CN203754973U - Sewing machine - Google Patents
Sewing machine Download PDFInfo
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- CN203754973U CN203754973U CN201420045199.5U CN201420045199U CN203754973U CN 203754973 U CN203754973 U CN 203754973U CN 201420045199 U CN201420045199 U CN 201420045199U CN 203754973 U CN203754973 U CN 203754973U
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- 238000009958 sewing Methods 0.000 title claims abstract description 101
- 230000007246 mechanism Effects 0.000 claims abstract description 141
- 238000000034 method Methods 0.000 claims abstract description 9
- 230000008569 process Effects 0.000 claims abstract description 9
- 230000005540 biological transmission Effects 0.000 claims description 12
- 230000001360 synchronised effect Effects 0.000 claims description 6
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 19
- 238000005452 bending Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 239000004744 fabric Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
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Abstract
The utility model relates to a sewing machine. The sewing machine reliably enables a relieving mechanism of tension application of a main thread clamp and a switching mechanism of tension application of an auxiliary thread clamp to work independently. In a sewing process, the main thread clamp applies tension on a face thread, and the auxiliary thread clamp relieves tension application on the face thread. In a thread cutting process, a thread cutting electromagnetic element conducts driving, and an operation thread is utilized to pull a clamping hanging portion. A first arm portion rotates clockwise with a bearing shaft as a pivot. A first cam face pushes a relieving pin. The main thread clamp relieves tension application on the face thread. A second arm portion is in linkage with a first arm portion and rotates anticlockwise with a bearing shaft as the pivot. A second cam face relieves pushing on a switching pin. The auxiliary thread clamp applies tension on the face thread.
Description
Technical field
The utility model relate to a kind of have upper thread is applied to the main tension disk of tension force and the Sewing machines of secondary tension disk.
Background technology
Sewing machines has horn portion and support portion.Horn portion has shank.Shank moves along the vertical direction.Support portion has shuttle in inside.Shuttle (rotating shuttle, shuttle) is followed moving up and down of shank and is rotated.Shank is provided with eedle in bottom, supplies with upper thread.Shuttle storage is wound with the peg or spindle of bottom line.Thereby the bottom line that shuttle is supplied with upper thread and peg or spindle interweaves and on cloth, forms needle tracking.Line cylinder is supplied with upper thread towards eedle.Upper thread passes the pinprick of eedle via being located at the secondary tension disk of horn portion, main tension disk, thread take-up spring, cable guiding device, thread take-up tension lever, cable guiding device etc.Main tension disk applies and makes required tension force upper thread in the time making.Secondary tension disk applies and cuts off the required tension force of upper thread in the time of tangent line.Main tension disk is removed the tension force of upper thread is applied in the time of tangent line.
The size of the tension force that main tension disk applies upper thread according to the kind adjustment of cloth in the time making.In the time making, the size of the tension force that main tension disk applies upper thread is greater than the size of the tension force that secondary tension disk applies upper thread.Sewing machines in the time of thick thinner cloth of sewing fabric etc., the tension force that need to reduce upper thread to apply.After the size of the tension force applying with main tension disk has correspondingly carried out secondary tension disk adjusting, secondary tension disk may cannot apply suitable tension force to upper thread in the time of tangent line.Therefore it is unstable that, Sewing machines may cause the thread residual quantity after cut-out.The main tension disk of the Sewing machines described in 1999 No. 244565 communique of Japanese Unexamined Patent Publication and secondary tension disk act on upper thread in the time making and when tangent line respectively independently, therefore, and the tension force can suitably apply tension force while making and tangent line time.
In the Sewing machines described in above-mentioned communique, the mechanism that the mechanism that main tension disk releasing tension force applies and secondary tension disk switching tension force apply state is mechanism independent of each other, utilizes different drive sources to move.This Sewing machines carries out the synchronous of the work of main tension disk and the work of secondary tension disk by electrical control.Therefore, break down while causing synchronously at arbitrary drive source, this Sewing machines carries out the action of tangent line sometimes under the state that upper thread is not applied suitable tension force.In this case, upper thread may not be cut off and left behind, and is wound in thread cutting device.
Utility model content
The purpose of this utility model is, the Sewing machines that provides a kind of switching mechanism that can make reliably the tension force of cancel system that the tension force of main tension disk applies and secondary tension disk apply to work alone.
The Sewing machines of technical scheme 1 comprises: eedle, and it is penetrated with upper thread, utilizes the rotation of main shaft and moves up and down; Thread take-up tension lever, itself and moving up and down of above-mentioned eedle move up and down linkedly; And thread clamping mechanism, the upstream side that it is positioned at above-mentioned thread take-up tension lever on the feed path of upper thread, can apply tension force to upper thread; This Sewing machines is characterised in that, above-mentioned thread clamping mechanism comprises: the first tension disk, and it applies tension force to upper thread in the time making; The second tension disk, it is positioned at the upstream side of above-mentioned the first tension disk on above-mentioned feed path, in the time making in having removed the state of the tension force that opposite line applies; Cancel system, the tension force that it applies upper thread for removing above-mentioned the first tension disk; Switching mechanism, it switches to the state that can apply to upper thread tension force for the state of explaining above-mentioned the second tension disk by oneself tension force except upper thread is applied; Driving mechanism, it is synchronous above-mentioned cancel system and the above-mentioned switching mechanism of driving in the time of tangent line; And power source, it is for driving above-mentioned driving mechanism.In the time making, the first tension disk applies tension force to upper thread, and the second tension disk is removed the tension force that upper thread is applied.Upper thread can obtain suitable tension force and form needle tracking with bottom line from the first tension disk.In the time of tangent line, driving mechanism synchronously drives cancel system and switching mechanism.The first tension disk is removed the tension force that upper thread is applied, and the second tension disk applies tension force to upper thread.Sewing function obtains suitable tension force and cuts off upper thread from the second tension disk.In the time that power source drives driving mechanism, driving mechanism Mechanical Driven cancel system and switching mechanism.Therefore, cancel system and switching mechanism there will not be asynchronous, can move reliably.
The Sewing machines of technical scheme 2 is characterized in that, this Sewing machines also comprises: tangent mechanism, and it utilizes the driving force of above-mentioned power source to carry out work, for upper thread is cut off; And transmission member, it couples together above-mentioned power source and above-mentioned driving mechanism, for transmit the driving force of above-mentioned power source to above-mentioned driving mechanism.Sewing machines can make cancel system that the work of tangent mechanism that the driving force of utilizing power source carries out and the power of the power source that driving mechanism utilization is transmitted by transmission member carries out and the work interlock of switching mechanism in the time of tangent line.Sewing machines, owing to utilizing the power drive driving mechanism transmitting from a power source, therefore can be manufactured the application's structure at an easy rate.Sewing machines, owing to driving driving mechanism with a drive source, therefore, can not produce deviation at synchronization point.Therefore, Sewing machines can precision carry out following work well, that is, remove upper thread is applied make time tension force and cut off time upper thread is applied to tension force.
In the Sewing machines of technical scheme 3, it is characterized in that, above-mentioned driving mechanism comprises: the first arm, it is the plate body extending between above-mentioned switching mechanism and above-mentioned cancel system, and the mode support shaft supporting of its first end rotating, this first end is the end near above-mentioned that side of cancel system on the bearing of trend of above-mentioned the first arm; The second arm, it is the plate body extending between above-mentioned switching mechanism and above-mentioned cancel system, and the mode support shaft supporting of its second end rotating, this second end is the end near above-mentioned that side of switching mechanism on the bearing of trend of above-mentioned the second arm; Support, its mode that can rotate with the first connecting portion of above-mentioned the first arm and the second connecting portion of above-mentioned the second arm supports respectively this first connecting portion and this second connecting portion, this first connecting portion is the end of the above-mentioned cancel system of distance on bearing of trend of above-mentioned the first arm that side far away, and this second connecting portion is the end of the above-mentioned switching mechanism of distance on bearing of trend of above-mentioned the second arm that side far away; And connecting portion, it is located at above-mentioned the first connecting portion, is connected with above-mentioned transmission member; Above-mentioned the first arm has and the first cam surface of above-mentioned cancel system butt at above-mentioned first end; Above-mentioned the second arm has and the second cam surface of above-mentioned switching mechanism butt at above-mentioned the second end; Above-mentioned power source makes above-mentioned support, above-mentioned the first connecting portion and above-mentioned the second connecting portion position by above-mentioned transmission member and above-mentioned connecting portion is towards moving with the orthogonal direction of the bearing of trend of above-mentioned the first arm and above-mentioned the second arm, make respectively above-mentioned the first arm and above-mentioned the second arm rotate, thereby make above-mentioned the first cam surface drive above-mentioned cancel system, and make above-mentioned the second cam surface drive above-mentioned switching mechanism.Support part supports the first arm and the second arm.Driving mechanism moves the position of support by power source, thereby the first arm and the second arm are rotated linkedly, therefore, and can be reliably to cancel system and the synchronous transferring power of switching mechanism.
In the Sewing machines of technical scheme 4, it is characterized in that, above-mentioned driving mechanism comprises: arm, it is the plate body extending between above-mentioned switching mechanism and above-mentioned cancel system; The first cam surface, it is located at an end of the bearing of trend of above-mentioned arm, with above-mentioned cancel system butt; The second cam surface, it is located at the other end of the bearing of trend of above-mentioned arm, with above-mentioned switching mechanism butt; Bolster, its mode that can rotate with above-mentioned arm supports the bearing of trend central authorities of above-mentioned arm; And connecting portion, it is located at the other end of above-mentioned arm, is connected with above-mentioned transmission member; Above-mentioned power source rotates above-mentioned arm by above-mentioned transmission member and above-mentioned connecting portion centered by above-mentioned bolster, thereby makes above-mentioned the first cam surface drive above-mentioned cancel system, and makes above-mentioned the second cam surface drive above-mentioned switching mechanism.Sewing machines moves cancel system by arm is rotated on the first cam surface, and switching mechanism is moved on the second cam surface.Therefore, Sewing machines can the tension force in the time having reduced to residue in the making of upper thread in the time of tangent line after, tension force when upper thread is applied to tangent line.Therefore, Sewing machines can suppress to produce the situation of deviation because the state incision section line excessively being stretched at upper thread causes the thread residual quantity of the upper thread that residues in eedle.
The Sewing machines of technical scheme 5,6 is characterized in that, this Sewing machines has following structure, and this structure, in the time that above-mentioned power source drives, makes above-mentioned the first cam surface drive above-mentioned cancel system before above-mentioned the second cam surface drives above-mentioned switching mechanism.Sewing machines start from the first tension disk remove the tension force of upper thread is applied play the second tension disk upper thread has been applied to tension force till generation time poor., Sewing machines creates two tension disks and upper thread is not applied the state of tension force or two tension disks upper thread is only applied the state of some tension force.Therefore, Sewing machines can be after having removed and having residued in the tension force of upper thread after making, tension force when upper thread is applied to tangent line.Carry out tangent line under the state that remains the tension force while making time, may there is line run-bake-needle fault in Sewing machines after tangent line,, line resilience occurs and situation about coming off from eedle that is.Tension force while making by releasing, Sewing machines can prevent line run-bake-needle fault.
The Sewing machines of technical scheme 7,8 is characterized in that, this Sewing machines have can produce simultaneously above-mentioned the first tension disk Zi the state that upper thread is applied to tension force to removing state that the intermediateness of process of state of the tension force that upper thread is applied and above-mentioned the second tension disk explain the tension force except upper thread is applied by oneself to the structure of intermediateness of process of state that can apply tension force.Therefore, Sewing machines can create two tension disks and upper thread not applied the state of tension force or two tension disks upper thread is only applied the state of some tension force reliably.
The Sewing machines of technical scheme 9 is characterized in that, this Sewing machines also comprises: thread take-up spring, and it is located at above-mentioned the first tension disk, follows the upper thread mobile by moving up and down of above-mentioned thread take-up tension lever to swing up and down; And limiting mechanism, it utilizes the above-mentioned thread take-up spring of power limit being transmitted by above-mentioned cancel system to swing up and down.Cancel system is removed the tension force that the first tension disk applies upper thread, and makes limiting mechanism work and limit the swing of thread take-up spring.Therefore, Sewing machines is cutting off when upper thread, can prevent that thread take-up spring from swinging and after causing cutting off, residue in the situation of the raw deviation of line volume production of upper thread.
In the Sewing machines of technical scheme 10, it is characterized in that, above-mentioned the first tension disk has the tension seat of the frame that is fixed on above-mentioned Sewing machines; Above-mentioned thread take-up spring is incorporated in above-mentioned tension seat, and outstanding from the periphery of above-mentioned tension seat; Above-mentioned limiting mechanism comprises: stem portion, and it is along the periphery setting of above-mentioned tension seat; And abutting part, it is positioned at the end of above-mentioned stem portion, relative with above-mentioned tension seat; The power that above-mentioned stem portion utilization is transmitted by above-mentioned cancel system moves along the periphery of above-mentioned tension seat, thereby above-mentioned abutting part and above-mentioned tension seat are clipped in above-mentioned thread take-up spring between them and limit above-mentioned thread take-up spring and swing.Limiting mechanism is clipped in thread take-up spring by moving along the periphery of tension seat the swing that limits thread take-up spring between it and tension seat.Therefore, Sewing machines is cutting off when upper thread, can prevent that thread take-up spring from swinging and after causing cutting off, residue in the situation of the raw deviation of line volume production of upper thread.
Brief description of the drawings
Fig. 1 is the perspective elevation of Sewing machines 1.
Fig. 2 is by near the stereogram that the top ends of Sewing machines 15, part obtains after amplifying.
Fig. 3 is the stereogram of thread clamping mechanism 100.
Fig. 4 is the left view of thread clamping mechanism 100.
The front view of Tu5Shi Xian release link mechanism 150.
The rearview of Tu6Shi Xian release link mechanism 150.
Fig. 7 is the stereogram of limiting mechanism 180.
Front view when Tu8Shi Xian release link mechanism 150 works.
Stereogram when Tu9Shi Xian release link mechanism 150 works.
Figure 10 is the figure in the ON/OFF moment of electromagnetic component while representing tangent line.
Figure 11 is the front view of the line release link mechanism 250 of alter mode.
Detailed description of the invention
With reference to the accompanying drawings of an embodiment of the present utility model.The general structure of Sewing machines 1 is described with reference to Fig. 1.In the following description, use the top to bottom, left and right, front and rear shown in arrow in figure.
As shown in Figure 1, Sewing machines 1 has support portion 2, column sections 3, horn portion 4 and top ends 5.Support portion 2 extends along left and right directions, has lower shaft 21, shuttle mechanism 80, tangent mechanism 90 etc. in inside.Column sections 3 is extended towards top from the right part of support portion 2 side, has Timing Belt 31, motor of sewing machine 32 etc. in inside.Horn portion 4 extends towards left from the upside of column sections 3.Horn portion 4 is relative with the upper surface of support portion 2, has main shaft 41 etc. in inside.Motor of sewing machine 32 makes main shaft 41 look the clockwise direction rotation under state around a left side.
There is top ends 5 at the left of horn portion 4.Top ends 5 has thread take-up tension lever driving mechanism 50, needle bar drive device 10, thread clamping mechanism 100(with reference to Fig. 3 in inside) etc.The right-hand member of main shaft 41 is connected with motor of sewing machine 32, and the left end of main shaft 41 is connected with shank up-down mechanism 45.Motor of sewing machine 32 rotates main shaft 41.Main shaft 41 transmits the revolving force of motor of sewing machine 32 to shank up-down mechanism 45 and thread take-up tension lever driving mechanism 50, thereby drives shank up-down mechanism 45 and thread take-up tension lever driving mechanism 50.Thread take-up tension lever driving mechanism 50 has thread take-up tension lever 51.Thread take-up tension lever 51 moves up and down and provokes upper thread in the time making.Thread take-up tension lever driving mechanism 50 is connected with needle bar drive device 10 in left side.Needle bar drive device 10 has shank 11, shank carrying cylinder 12, shank carrying cylinder 13, shank anchor ear 14 etc.Shank carrying cylinder 12 and shank carrying cylinder 13 are all fixed on the frame (omitting diagram) of Sewing machines 1.The upper and lower that shank carrying cylinder 12 and shank carrying cylinder 13 support respectively shank 11, guiding shank 11 up and down direction moves.The position of shank anchor ear 14 between shank carrying cylinder 12 and shank carrying cylinder 13 keeps shank 11.Shank anchor ear 14 is connected with shank up-down mechanism 45 by thread take-up tension lever driving mechanism 50.Shank up-down mechanism 45 transmits to shank anchor ear 14 driving force of following the rotation of main shaft 41 and produce.Shank anchor ear 14 drives linkedly with thread take-up tension lever 51, and shank 11 is moved up and down.The lower end side of shank 11 comes out from the downside of top ends 5, extends towards below.Shank 11 is provided with eedle 7 in lower end.Lower shaft 21 extends along left and right directions, has belt wheel 23 at right-hand member.Main shaft 41 has belt wheel 42 in the position corresponding with the position of the belt wheel 23 of lower shaft 21.Belt wheel 42 and belt wheel 23 are connected by Timing Belt 31.Motor of sewing machine 32 rotates main shaft 41, and makes lower shaft 21 look the clockwise direction rotation under state around a left side by Timing Belt 31.Lower shaft 21 has lower shaft gear 22 in the left side of belt wheel 23.Shuttle mechanism 80 has the shuttle axle 81 extending along left and right directions.Shuttle axle 81 configures abreast with lower shaft 21, and shuttle axle 81 has shuttle shaft gear 84 at right-hand member.Shuttle shaft gear 84 engages with the lower shaft gear 22 of lower shaft 21.Shuttle axle 81 is driven in lower shaft 21, looks the counter clockwise direction rotation under state around a left side.Shuttle axle 81 has rotating shuttle 8 at left end.Rotating shuttle 8 together rotates with shuttle axle 81.Rotating shuttle 8 is provided with bobbin case 82.Bobbin case 82 storages are wound with the peg or spindle (omitting diagram) of bottom line.Support portion 2 is provided with needle plate (omitting diagram) on top.Rotating shuttle 8 is positioned at the below of needle plate.Shank 11 is positioned at the top of needle plate.In the time that shank 11 declines, the appearance pin hole (omitting diagram) that the lower end of eedle 7 is passed in needle plate upper shed arrives rotating shuttle 8.Rotating shuttle 8 cooperates with shank 11, and the bottom line of drawing from bobbin case 82 is crisscrossed to the upper thread that eedle 7 keeps.Needle plate top chosen by the upper thread after staggered with bottom line by thread take-up tension lever 51, thereby on cloth, form needle tracking.Tangent mechanism 90 is positioned at the top of shuttle mechanism 80 and is near the position of appearance pin hole of needle plate.Tangent mechanism 90 has movable knife (omitting diagram) and dead knife (omitting diagram).Movable knife can rotate along the periphery of rotating shuttle 8.Tangent mechanism 90 by tangential cam (omit diagram) etc. with tangent line electromagnetic component 190(with reference to Fig. 3) be connected.Tangent line electromagnetic component 190 drives with the opportunity that is input as of tangent line signal.In the time that tangent line electromagnetic component 190 drives, tangential cam carries out work.Tangential cam transmits the driving force of shuttle axle 81 to movable knife.Upper thread and bottom line are clipped in their middle cut-outs by movable knife and dead knife.
The structure of thread clamping mechanism 100 is described with reference to Fig. 2～Fig. 7.As shown in Figure 2 and Figure 3, thread clamping mechanism 100 has main tension disk 110, secondary tension disk 130, removes pin 120, switches pin 140 and line release link mechanism 150.Main tension disk 110 and secondary tension disk 130 are fixed on the frame of Sewing machines 1, are exposed to the front surface of top ends 5.Main tension disk 110 is positioned at the bottom of top ends 5 front surfaces.Main tension disk 110 mainly applies tension force to upper thread in the time making.Secondary tension disk 130 is positioned at the top of top ends 5 front surfaces.Secondary tension disk 130 mainly applies tension force to upper thread in the time of tangent line.Main tension disk 110 and secondary tension disk 130 form to eedle 7 to be supplied with around a part for the feed path of the upper thread on line cylinder 6.Secondary tension disk 130 is positioned at the position by feed path upstream side than main tension disk 110.Feed path comprises cable guiding device 43, secondary tension disk 130, main tension disk 110, wire-hanging hook 55, cable guiding device 56, thread take-up tension lever 51 and cable guiding device 57～59.Cable guiding device 43 the upper surface of horn portion 4 towards above outstanding, guide the upper thread of drawing from line cylinder 6 to secondary tension disk 130.Wire-hanging hook 55 is positioned at the left of main tension disk 110.Cable guiding device 56 is positioned at the top of main tension disk 110.Wire-hanging hook 55 and cable guiding device 56 guide the upper thread after secondary tension disk 130 and main tension disk 110 to thread take-up tension lever 51.Main tension disk 110 has thread take-up spring 115.Thread take-up spring 115 is positioned at autonomous tension disk 110 to be supplied with to wire-hanging hook 55 on the path of upper thread, forms a part for feed path.Cable guiding device 57 is located at the position relative with cable guiding device 56 at the left of thread take-up tension lever 51, guides the upper thread after thread take-up tension lever 51 to shank 11.Cable guiding device 58 and cable guiding device 59 are located at the bottom of shank 11, guide the upper thread after cable guiding device 57 guiding to eedle 7.
As shown in Figure 4, main tension disk 110 has tension seat 111, clamp axle 112, the first cable-clamping disc 113, the second cable-clamping disc 114, thread take-up spring 115, clamp platen 116, clamp spring 117, fixed component 118 and drive rod 119.Tension seat 111 is the pedestals on fore-and-aft direction with the drum of axis hole.Tension seat 111 is held in clamp axle 112 in its axis hole.Tension seat 111 is fixed on the frame of Sewing machines 1 by screw (omitting diagram).Clamp axle 112 is the axis bodies along the drum of fore-and-aft direction extension.Clamp axle 112 is inserted into rearward end in the axis hole of tension seat 111 and is fixed with screw (omit and illustrate).Clamp axle 112 has axis hole (omitting diagram) at axle center place.The axis hole of clamp axle 112 can run through for drive rod 119.Clamp axle 112 has external screw thread at the outer peripheral face of front, has slit 112A in side.Slit 112A is formed near its central authorities from the front end of clamp axle 112 along the axle center of clamp axle 112.Slit 112A is connected with the axis hole of clamp axle 112.Slit 112A can insert for the bridge part of clamp platen 116 (omitting diagram).Clamp axle 112 is fixed with thread take-up spring 115 in stem portion periphery.Thread take-up spring 115 is helical spring.Thread take-up spring 115 is enclosed within spire the stem portion periphery of clamp axle 112, and is incorporated in tension seat 111.One end of thread take-up spring 115 is formed with hook-shaped wire portion 115A.Wire portion 115A is outstanding from the periphery of tension seat 111.Thread take-up spring 115 has the spring force on the main clockwise direction of looking under state, can on above-below direction, swing.The first cable-clamping disc 113 and the second cable-clamping disc 114 are all the metallic plates in central authorities with the plate-like of axis hole.The first cable-clamping disc 113 with the second cable-clamping disc 114 so that the mode that plate face is each other faced mutually configure, their the outer Zhou Dynasty separately of direction warpages away from each other.The first cable-clamping disc 113 makes concave side under the state of tension seat 111, make the axis hole of clamp axle 112 through the first cable-clamping disc 113.The concave side of the first cable-clamping disc 113 is relative with the spire of thread take-up spring 115.The second cable-clamping disc 114 makes convex side under the state of the first cable-clamping disc 113, make the axis hole of clamp axle 112 through the second cable-clamping disc 114.The first cable-clamping disc 113 and the second cable-clamping disc 114 can rotate with respect to clamp axle 112.Clamp platen 116 is discoideus member, has axis hole in central authorities.The axis hole of clamp platen 116 is a pair of semi-circular shape, has banded bridge part (omitting diagram) between this pair of semi-circular shape part.Clamp platen 116 has jut (omitting diagram) in the periphery of the plate face of a side.Jut be shaped as the ring-type rounding on circumferentially.Clamp platen 116 makes the axis hole of clamp axle 112 through clamp platen 116 under the state facing to the second cable-clamping disc 114 at the plate that makes jut side.The concave side of jut and the second cable-clamping disc 114 connects.The bridge part of clamp platen 116 is arranged in the slit 112A of clamp axle 112.Clamp spring 117 is helical spring.Clamp spring 117 is from front distolateral its external diameter increase backward.Clamp spring 117 is disposed at the front side of clamp platen 116, is enclosed within on clamp axle 112.Clamp spring 117 is disposed at rearward end the recess of the jut of clamp platen 116.Clamp spring 117 pushes clamp platen 116, towards tension seat 111 sides to the second cable-clamping disc 114 and first cable-clamping disc 113 application of forces.The member that fixed component 118 is nut type.Fixed component 118 is threadedly engaged with the external screw thread of clamp axle 112.Fixed component 118 can be screwed into the optional position on fore-and-aft direction and the front end of clamp spring 117 is positioned with respect to clamp axle 112.Clamp spring 117 presses the power of the second cable-clamping disc 114 and the first cable-clamping disc 113 to change with respect to the position of clamp axle 112 according to fixed component 118 towards tension seat 111 thrusters.The bar that drive rod 119 is thin footpath.Drive rod 119 is in the rear end of tension seat 111 is inserted into the axis hole of clamp axle 112.The front end of drive rod 119 in the axis hole of clamp axle 112 with the bridge part butt of clamp platen 116.The rear end of drive rod 119 is outstanding towards the rear from the rear end of tension seat 111, with the front end butt of removing pin 120.The active force that main tension disk 110 utilizes clamp spring 117 in the time making is clipped in upper thread between the first cable-clamping disc 113 and the second cable-clamping disc 114 and upper thread is applied to tension force.Removing pin 120 is the member along the pole shape of fore-and-aft direction extension.The retaining member (omitting diagram) of being located in frame keeps this releasing pin 120 to remove pin 120 mode that direction moves forwards, backwards.The end face of removing the leading section 121 of pin 120 is plane, and rearward end 122 is hemispherical.The rear end butt of leading section 121 and drive rod 119.The first cam surface 167 butts of the first arm 160 of rearward end 122 and line release link mechanism 150.
Main tension disk 110 clips and maintains limiting mechanism 180 between tension seat 111 and releasing pin 120.Limiting mechanism 180 extends along the cable-clamping disc 113 sides outer Zhou Dynasty first of tension seat 111.As shown in Fig. 4, Fig. 7, limiting mechanism 180 has hole portion 181, base portion 182, stem portion 183 and abutting part 184.Hole portion 181, at base portion 182 place's openings, has the diameter that can run through for drive rod 119.Base portion 182 has round plate 182A and the 182B of fan portion.Round plate 182A is leaning on the roughly oblong plate-like portion of offering porose portion 181 on the position of end side than central authorities.The 182B of fan portion is the plate-like portion that the external peripheral zone apart from hole portion 181 that side far away of round plate 182A is fan-shaped expansion.Base portion 182 is positioned at the rear of tension seat 111.Stem portion 183 is that the acies of the 182B of fan portion outer circumferential side is to circular-arc the position extending out towards front.The inner circumferential side part of stem portion 183 and roughly same footpath of the periphery of tension seat 111, stem portion 183 is along the periphery configuration of tension seat 111.Stem portion 183 has taper surface 183A in the part of the side of front.Abutting part 184 is the leading section of stem portion 183.Abutting part 184 with the protuberance 111A(of front that is located at tension seat 111 with reference to Fig. 4) relative.Limiting mechanism 180 can move up in front and back with respect to tension seat 111.Now, stem portion 183 moves along the periphery of tension seat 111.The wire portion 115A that accompanies thread take-up spring 115 between abutting part 184 and protuberance 111A, can limit the swing of thread take-up spring 115.Accompany thread take-up spring 115 between abutting part 184 and protuberance 111A time, the taper surface 183A of stem portion 183 prevents from disturbing between wire portion 115A and stem portion 183.
As shown in Figure 4, secondary tension disk 130 has tension seat 131, clamp axle 132, the first cable-clamping disc 133, the second cable-clamping disc 134, cable guiding device 135, clamp platen 136, clamp spring 137, fixed component 138 and drive rod 139.The secondary structure of tension disk 130 and the structure of main tension disk 110 are roughly the same, therefore, different structures are only described.The active force that secondary tension disk 130 utilizes clamp spring 137 in the time of tangent line is clipped in upper thread between the first cable-clamping disc 133 and the second cable-clamping disc 134 and upper thread is applied to tension force.Cable guiding device 135 is the board members that extend along the vertical direction and be bent.Cable guiding device 135 is positioned at the rear of the first cable-clamping disc 133.Jun Chao front, the above-below direction both ends bending of cable guiding device 135.Cable guiding device 135 has wire guide 135A at the kink of upper end side, has wire guide 135B(with reference to Fig. 3 at the kink of lower end side).Through cable guiding device 43(with reference to Fig. 2) after upper thread from the wire guide 135A of cable guiding device 135 upper end side, pass.Upper thread after wire guide 135A passes from the first cable-clamping disc 133 and the second cable-clamping disc 134, then passes the wire guide 135B of cable guiding device 135 lower end side, thereby is directed to main tension disk 110.The drive rod 139 of secondary tension disk 130 and the front end butt that switches pin 140.Switching pin 140 is the member along the pole shape of fore-and-aft direction extension.Be located at retaining member in the frame of Sewing machines 1 and keep this switching pin 140 to switch the mode that pin 140 can be mobile to front-rear direction.The end face that switches the leading section 141 of pin 140 is plane, and rearward end 142 is hemispherical.The rear end butt of leading section 141 and drive rod 139.The second cam surface 177 butts of the second arm 170 of rearward end 142 and line release link mechanism 150.
As shown in Fig. 4～Fig. 6, line release link mechanism 150 has the first arm 160 and the second arm 170.The first arm 160 is to switch pin 140 and removing the elongated plate body extending along the vertical direction between pin 120.The first arm 160 has upper end 161 and bottom 162 at above-below direction both ends.Upper end 161 is apart from the end of removing pin 120 that side far away on above-below direction.Bottom 162 is near the end of removing pin 120 those sides on above-below direction.The first arm 160 has in bottom 162 towards right-hand outstanding cam base portion 163.The stem portion 165 between upper end 161 and bottom 162 of the first arm 160 is step-like bending on fore-and-aft direction.Bottom 162 is positioned at than position (with reference to Fig. 4) on the front, upper end 161.The first arm 160 offers support holes 164 in bottom 162.The bolster 152 being fixed in the frame of Sewing machines 1 is embedded in support holes 164.The first arm 160 can rotate taking bolster 152 as fulcrum.
The first arm 160 has the first cam bit 166 in the upper end, right side of cam base portion 163.The first cam bit 166 has the first cam surface 167.The first cam surface 167 has inclined plane part 167A and planar portions 167B.Inclined plane part 167A extends towards front upper place from the connecting portion between it and cam base portion 163.Planar portions 167B, from the bending of the upper end of inclined plane part 167A, extends towards top substantially in parallel with the surface of cam base portion 163.Remove rearward end 122 and first cam surface 167 butts of pin 120.In the time that the first arm 160 rotates taking bolster 152 as fulcrum, the rearward end 122 of removing pin 120 moves on the first cam surface 167.The first arm 160 has fulcrum post 151 in upper end 161.Fulcrum post 151 is projected into the rear surface side of the first arm 160.The mode that fulcrum post 151 can rotate with the bottom 172 of the second arm 170 supports this bottom 172.Fulcrum post 151 allows to relatively rotate between upper end 161 and bottom 172.The first arm 160 has hook part 168 in upper end 161.Hook part 168 is to be turned back towards front in the right part of upper end 161 and the upper and lower a pair of tabular component that arranges.The dop portion 196 of hook part 168 engaging operating line 195 between upper and lower a pair of tabular component.Interval between the upper and lower a pair of tabular component of hook part 168 is larger than the size of operating line 195, and less than the size of dop portion 196.Hook part 168 is positioned at the below of fulcrum post 151.Hook part 168 is positioned at the right side of the dop portion 196 of operating line 195.When present dynasty right side pull operation line 195, dop portion 196, towards right-hand pushing hook part 168, moves 161Chao right side, upper end.The first arm 160 rotates around the main clockwise direction of looking under state taking bolster 152 as fulcrum.The first arm 160 has reset projection 169 in bottom 162.Reset projection 169 is extended towards below from bottom 162.Reset projection 169 engages with the one end of spring (omitting diagram).The other end of spring is fixed on the frame of Sewing machines 1.The projection 169 that makes spring to reset moves towards right side.The first arm 160 rotates around main counter clockwise direction of looking under state taking bolster 152 as fulcrum.The second arm 170 is to switch pin 140 and removing the elongated plate body extending along the vertical direction between pin 120.The length of the second arm 170 is less than the length of the first arm 160.The second arm 170 has upper end 171 and bottom 172 at above-below direction both ends.Upper end 171 is near the end of switching pin 140 those sides on above-below direction.Bottom 172 is apart from the end of switching pin 140 that side far away on above-below direction.The second arm 170 has in upper end 171 towards right-hand outstanding cam base portion 173.The stem portion 175 between upper end 171 and bottom 172 of the second arm 170 is step-like bending on fore-and-aft direction.Bottom 172 is positioned at than the position at 171Kao rear, upper end (with reference to Fig. 4).The second arm 170 offers support holes 174 in upper end 171.The bolster 153 being fixed in the frame of Sewing machines 1 is embedded in support holes 174.The second arm 170 can rotate taking bolster 153 as fulcrum.The second arm 170 the right part of cam base portion 173 have towards above the second outstanding cam bit 176.The second cam surface 177 has inclined plane part 177A and planar portions 177B.Inclined plane part 177A extends towards front upper place from the connecting portion between it and cam base portion 173.Planar portions 177B, from the bending of the upper end of inclined plane part 177A, extends towards top substantially in parallel with the surface of cam base portion 173.Switch rearward end 142 and second cam surface 177 butts of pin 140.In the time that the second arm 170 rotates taking bolster 153 as fulcrum, the rearward end 142 of switching pin 140 moves on the second cam surface 177.The second arm 170 offers slotted hole 178(with reference to Fig. 6 in bottom 172).Slotted hole 178 has long limit on above-below direction.The second arm 170, so that the overlapping mode of the rear side of the upper end 161 of its bottom 172 and the first arm 160 configures, is inserted into fulcrum post 151 in slotted hole 178.Fulcrum post 151 can move along the inner peripheral surface of slotted hole 178.The bottom 172 of the second arm 170 and the upper end 161 of the first arm 160 can relatively rotate.
As shown in Figure 3, thread clamping mechanism 100 is connected with tangent line electromagnetic component 190 by operating line 195.Tangent line electromagnetic component 190 is power sources that tangent mechanism 90 is worked.The push rod (plunger) 191 of tangent line electromagnetic component 190 from tangent line electromagnetic component 190 towards right-hand extension.Push rod 191 is connected with an end of electromagnetic component bar 192.The mode axle that support portion 2 can rotate with electromagnetic component bar 192 supports the other end of this electromagnetic component bar 192.Therefore, tangent line electromagnetic component 190 drives push rod 191 and electromagnetic component bar 192 is rotated.Electromagnetic component bar 192 has jut 193 and fixed part 194.Jut 193 is outstanding towards left at the fore-and-aft direction central portion of electromagnetic component bar 192.In the time that electromagnetic component bar 192 rotates, jut 193 is to tangential cam bar axle (omitting diagram) transferring power.Tangential cam bar axle makes tangential cam (omitting diagram) work, thereby drives tangent mechanism 90(with reference to Fig. 1).Fixed part 194 extends towards below from electromagnetic component bar 192.The other end of fixed part 194 fixing operation lines 195.Operating line 195 runs through from being disposed in the pipe 197 in support portion 2, column sections 3 and horn portion 4.The dop portion 196 of operating line 195 1 ends is stuck in hook part 168 places of the first arm 160.
The action of thread clamping mechanism 100 is described.As mentioned above, thread clamping mechanism 100 couples together line release link mechanism 150 and tangent line electromagnetic component 190 by operating line 195.In the time making, the push rod 191 of tangent line electromagnetic component 190 maintains main body from tangent line electromagnetic component 190 towards right-hand outstanding state.The fixed part 194 of electromagnetic component bar 192 is positioned at the position away from tangent line electromagnetic component 190 those sides.The spring (omitting diagram) of the line release link mechanism 150 of thread clamping mechanism 100 is towards the reset projection 169 of the bottom 162 of right-hand pushing the first arm 160.The first arm 160 rotates around main counter clockwise direction of looking under state taking bolster 152 as fulcrum.The fulcrum post 151 of upper end 161 pushes the slotted hole 178 of the bottom 172 of the second arm 170 towards left.The second arm 170 rotates around the main clockwise direction of looking under state taking bolster 153 as fulcrum.Therefore, the upper end 171 of the upper end 161 of the first arm 160 and bottom 162 and the second arm 170 and bottom 172 are arranged in (with reference to Fig. 5) on straight line on above-below direction.
As shown in Figure 5, remove pin 120 rearward end 122(with reference to Fig. 4) coupling part between cam base portion 163 and the inclined plane part 167A of the first cam surface 167.As shown in Figure 4, the drive rod 119 of main tension disk 110 is not subject to remove the pushing force of pin 120, does not push clamp platen 116.Therefore the active force that, main tension disk 110 utilizes clamp spring 117 is clipped in upper thread between the first cable-clamping disc 113 and the second cable-clamping disc 114 and upper thread is applied to tension force.
As shown in Figure 5, the coupling part of the rearward end 142 of switching pin 140 between inclined plane part 177A and the planar portions 177B of the second cam surface 177.As shown in Figure 4, the drive rod 139 of secondary tension disk 130 is subject to switching the pushing force towards front of pin 140 and pushes clamp platen 136.Clamp platen 136 overcomes the active force of clamp spring 137 towards front pushing clamp spring 137.The second cable-clamping disc 134 slows down the power that pushes towards the rear the first cable-clamping disc 133.The state of secondary tension disk 130 tension force in having removed opposite line and applying.The state of having removed tension force is not limited to the state that the tension force that makes the upper thread apply is zero, also comprises the state that only applies some tension force.Tension force when upper thread is only applied to some tension force is can be to not making the enough little tension force of the degree exerting an influence.The size of having removed the tension force under the state of tension force depends on the movable length of drive rod 139 on fore-and-aft direction.If change the angle of inclination of the inclined plane part 177A of the second cam surface 177, the movable length of drive rod 139 can change.In the time that the movable length of drive rod 139 is elongated, the tension force of having removed under the state of tension force levels off to zero.For example, also can between the first cable-clamping disc 133 and cable guiding device 135, Compress Spring be set, and in the first cable-clamping disc 133 with the enough little state of pressing the second cable-clamping disc 134 of trying hard to recommend, produce the tension force under the state of having removed tension force.Also be the same for main tension disk 110.When Sewing machines 1 carries out tangent line finishing to make, input tangent line signal.Tangent line electromagnetic component 190, because the input of tangent line signal drives, is pulled into tangent line electromagnetic component 190 inside by push rod 191.One end of electromagnetic component bar 192 is towards tangent line electromagnetic component 190 side shiftings.Fixed part 194 is towards tangent line electromagnetic component 190 side shiftings, pull operation line 195.Operating line 195 transmits the driving force of tangent line electromagnetic component 190 to line release link mechanism 150.
As shown in Figure 8, Figure 9, in the time of tangent line electromagnetic component 190 pull operation line 195, dop portion 196 is towards right-hand movement.Dop portion 196, towards the hook part 168 of right-hand pushing the first arm 160, makes upper end 161 towards right-hand movement.The first arm 160 rotates around the main clockwise direction of looking under state taking bolster 152 as fulcrum.The fulcrum post 151 of upper end 161 is towards the slotted hole 178 of the bottom 172 of right-hand pushing the second arm 170.The second arm 170 rotates around main counter clockwise direction of looking under state taking bolster 153 as fulcrum.Follow the rotation of the first arm 160, the first cam bit 166 moves towards lower left taking bolster 152 as fulcrum.The coupling part of the rearward end 122 of releasing pin 120 between inclined plane part 167A and cam base portion 163 moves to inclined plane part 167A, and moves towards planar portions 167B on the first cam surface 167.The first cam surface 167 is removed pin 120 towards front pushing.Remove the drive rod 119 of the main tension disk 110 of pin 120 pushing.Drive rod 119 pushes clamp platen 116.Clamp platen 116 overcomes the active force of clamp spring 117 towards front pushing clamp spring 117.The second cable-clamping disc 114 slows down the power that pushes towards the rear the first cable-clamping disc 113.Main tension disk 110 is removed the tension force that upper thread is applied.
Remove pin 120 at pushing drive rod 119(with reference to Fig. 4) time, push the base portion 182 of limiting mechanism 180 simultaneously.Limiting mechanism 180 moves towards front.Abutting part 184 and protuberance 111A are clipped in the wire portion 115A of thread take-up spring 115 between them.Therefore, limiting mechanism 180 can limit the swing of thread take-up spring 115 reliably.Follow the rotation of the second arm 170, the second cam bit 176 moves towards upper left side taking bolster 153 as fulcrum.The rearward end 142 of switching pin 140 moves towards the coupling part between inclined plane part 177A and cam base portion 173 from the coupling part between inclined plane part 177A and planar portions 177B on the second cam surface 177.Switch the power that pin 140 slows down the drive rod 139 of the secondary tension disk 130 of pushing.The power that drive rod 139 pushes clamp platen 136 slows down.Clamp spring 137 is in the state to clamp platen 136 application of forces towards the rear.Therefore the active force that, secondary tension disk 130 utilizes clamp spring 137 is clipped in upper thread between the first cable-clamping disc 133 and the second cable-clamping disc 134 and upper thread is applied to tension force.
In the time of tangent line, operating line 195 transmits the driving force of tangent line electromagnetic component 190, and the first arm 160 and the second arm 170 are rotated simultaneously.During releasing pin 120 is mobile on the first cam surface 167, switches pin 140 and move on the second cam surface 177., the first cam surface 167 pushing releasing pin 120, the second cam surfaces 177 slow down the pushing to switching pin 140.Now, produce simultaneously main tension disk 110 Zi the state that upper thread is applied to tension force to removing the intermediateness of process of state of the tension force that upper thread is applied and state that secondary tension disk 130 is explained the tension force except upper thread is applied by oneself to the intermediateness that upper thread is applied to the process of the state of tension force.The autonomous tension disk 110 of thread clamping mechanism 100 start to remove to the tension force of upper thread apply play secondary tension disk 130 upper thread applied to tension force till generation time poor., thread clamping mechanism 100 has and can remove main tension disk 110 simultaneously and keep the state of upper thread and the period that secondary tension disk 130 keeps the state of upper thread.Therefore, can in the time of tangent line, to realize the tension force while making to residue in the making of upper thread be zero to thread clamping mechanism 100 or level off to zero state.
As shown in figure 10, in the time having the input of tangent line signal, in the time that the position of rotation of main shaft 41 arrives 15 °, it is low speed that motor of sewing machine 32 makes rotating speed.Tangent line electromagnetic component 190 starts to drive in the time that the position of rotation of main shaft 41 is 230 °.In the time that the position of rotation of main shaft 41 is 230 °, near the lower end of the movable range of shank 11 in moving up and down, it is the moment that stops signal under output needle.Under pin, signal is the testing result based on encoder (omit diagram) and the signal exported, and this encoder detects the anglec of rotation of the output shaft of motor of sewing machine 32.As shown in the thread take-up tension lever curve movement of Figure 10, thread take-up tension lever 51 in the time that the position of rotation of main shaft arrives 300 °, the lower end of the movable range in moving up and down.Movable knife and dead knife exceed 360 ° and line is cut off while further arriving 35 ° at the position of rotation of main shaft 41.In the time that the position of rotation of main shaft 41 is 35 °, near the upper end of the movable range of shank 11 in moving up and down, it is the moment that starts signal on output needle.On pin signal the same with signal under pin be the signal of encoder output.Tangent line electromagnetic component 190 stops driving in the time that the position of rotation of main shaft 41 is 55 °.In the time that the position of rotation of main shaft 41 is 55 °, for shank 11, it is the moment that stops signal on output needle.Now, motor of sewing machine 32 stops driving.It is the position of rotation of main shaft 41 period between 230 °～360 ° that thread clamping mechanism 100 can make main tension disk 110 remove moment that moment of the tension force that upper thread is applied and secondary tension disk 130 apply tension force to upper thread in the time of tangent line.Thread clamping mechanism 100 can, by changing size, the angle of inclination of the inclined plane part 167A of the first cam surface 167 and the inclined plane part 177A of the second cam surface 177, be adjusted the above-mentioned moment.Thread clamping mechanism 100 can, by changing distance and the distance between bolster 153 and the second cam bit 176 etc. between bolster 152 and the first cam bit 166, be adjusted the above-mentioned moment.
As mentioned above, in the time making, main tension disk 110 applies tension force to upper thread, and secondary tension disk 130 is removed the tension force that upper thread is applied.Upper thread independently tension disk 110 obtains suitable tension force and forms needle tracking with bottom line.In the time of tangent line, the synchronous driving of line release link mechanism 150 removed pin 120 and switched pin 140.Main tension disk 110 is removed the tension force that upper thread is applied, and secondary tension disk 130 applies tension force to upper thread.Sewing machines 1 can obtain suitable tension force and cut off upper thread from secondary tension disk 130.Line release link mechanism 150 Mechanical Driven are removed pin 120 and are switched pin 140.Therefore, remove pin 120 and switch pin 140 not produce synchronism deviation, can move reliably.
The driving of the tangent mechanism 90 that the power that Sewing machines 1 can make utilization be provided by tangent line electromagnetic component 190 in the time of tangent line carries out and line release link mechanism 150 utilize releasing pin 120 and the switching that the power of the tangent line electromagnetic component 190 being transmitted by operating line 195 carries out to sell 140 work interlock.
Sewing machines 1 can utilize the power drive line release link mechanism 150 transmitting from a tangent line electromagnetic component 190, therefore, can manufacture at an easy rate.Sewing machines 1, due to a tangent line electromagnetic component 190 drive wire release link mechanisms 150, therefore, can synchronously can not produce deviation.Therefore, Sewing machines 1 can precision carry out following work well, that is, remove upper thread is applied make time tension force and cut off time upper thread is applied to tension force.Fulcrum post 151 with the first arm 160 and the second arm 170 in relative rotation mode link this first arm 160 and the second arm 170.The first arm 160 and second arm 170 of line release link mechanism 150 rotate linkedly, therefore, and can be reliably to removing pin 120 and switching pin 140 synchronous transferring power.Sewing machines 1 makes to remove to be sold for 120 periods of moving on the first cam surface 167 and switches the period synchronization that pin 140 moves on the second cam surface 177., the period of the first cam surface 167 pushing releasing pins 120 and the second cam surface 177 slow down the period synchronization of the pushing to switching pin 140.Therefore, Sewing machines 1 can produce provisionally main tension disk 110 simultaneously and removed state and the secondary tension disk 130 that tension force applies and removed the state that tension force applies.Sewing machines 1 can the tension force in the time having reduced to residue in the making of upper thread in the time of tangent line after, tension force when upper thread is applied to tangent line.Therefore, Sewing machines 1 can suppress to cut off under the state because excessively being stretched at upper thread the situation of the thread residual quantity generation deviation that causes the upper thread that residues in eedle 7.
Line release link mechanism 150 removes the tension force that main tension disk 110 applies upper thread, and limiting mechanism 180 is worked and limit the swing of thread take-up spring 115.Therefore, Sewing machines 1 can prevent cutting off when upper thread, and thread take-up spring 115 rotates and after causing cutting off, residues in the situation of the raw deviation of line volume production of upper thread.
In the present embodiment, main tension disk 110 is equivalent to the first tension disk of the present utility model.Secondary tension disk 130 is equivalent to the second tension disk of the present utility model.Remove pin 120 and be equivalent to cancel system of the present utility model.Switch pin 140 and be equivalent to switching mechanism of the present utility model.Line release link mechanism 150 is equivalent to driving mechanism of the present utility model.Tangent line electromagnetic component 190 is equivalent to power source of the present utility model.Operating line 195 is equivalent to transmission member of the present utility model.Fulcrum post 151 is equivalent to support of the present utility model.Hook part 168 is equivalent to connecting portion of the present utility model.
The utility model can carry out various changes except above-mentioned embodiment.Sewing machines 1 is not limited to and uses operating line 195, also can use other the mechanical structure such as gear, bar from tangent line electromagnetic component 190 to thread clamping mechanism 100 transferring power.Sewing machines 1 also can arrange with the electromagnetic component of tangent line electromagnetic component 190 interlocks and drive thread clamping mechanism 100 on thread clamping mechanism 100.The first arm 160 of above-mentioned embodiment and the rotation direction of the second arm 170 are examples.The first arm 160 also can rotate towards the direction different from embodiment with the second arm 170.In this case, the planar portions 177B of the planar portions 167B of the first cam surface 167 and inclined plane part 167A and the second cam surface 177 and the formation position of inclined plane part 177A are as long as change according to the rotation direction of the first arm 160 and the second arm 170 respectively.
The first arm 160 and the second arm 170 also can one form.The line release link mechanism 250 of alter mode is described with reference to Figure 11.Below, for the incomplete structure explanation identical with above-mentioned embodiment.Line release link mechanism 250 has arm 260.Arm 260 is to switch pin 140 and removing the elongated plate body extending along the vertical direction between pin 120.Arm 260 has bottom 261 and upper end 262 at above-below direction both ends.Arm 260 offers support holes 264 in above-below direction substantial middle.The bolster 251 being fixed in the frame of Sewing machines 1 is embedded in support holes 264.Arm 260 can rotate taking bolster 251 as fulcrum.
Bottom 261 has towards right-hand the first outstanding cam bit 266, and upper end 262 has towards right-hand the second outstanding cam bit 276.The first cam bit 266 has the first cam surface 267 at front surface.The first cam surface 267 has inclined plane part 267A and planar portions 267B.Inclined plane part 267A is positioned at the right part of bottom 261, extends towards right front.Planar portions 267B is from the right-hand member bending of inclined plane part 267A, with the front surface of bottom 261 substantially in parallel towards right-hand extension.Remove rearward end 122 and first cam surface 267 butts of pin 120.In the time that arm 260 rotates taking bolster 251 as fulcrum, the rearward end 122 of removing pin 120 moves on the first cam surface 267.The second cam bit 276 has the second cam surface 277 at front surface.The second cam surface 277 has planar portions 277A and inclined plane part 277B.Inclined plane part 277B is positioned at the right part of upper end 262, extends towards right front.Planar portions 277A is from the right-hand member bending of inclined plane part 277B, with the front surface of upper end 262 substantially in parallel towards right-hand extension.Switch rearward end 142 and second cam surface 277 butts of pin 140.In the time that arm 260 rotates taking bolster 251 as fulcrum, the rearward end 142 of switching pin 140 moves on the second cam surface 277.Arm 260 has hook part 268 in upper end 262.Hook part 268 is by turning back the right part of upper end 262 to arrange towards the rear.Hook part 268 engaging operating lines 195.When present dynasty right side pull operation line 195, move towards right side by hook part 268 upper end 262.Arm 260 rotates around the main clockwise direction of looking under state taking bolster 251 as fulcrum.Arm 260 has spring (omit diagram), spring all the time towards make arm 260 taking bolster 251 as fulcrum around main direction of looking the counter clockwise direction rotation under state to arm 260 application of forces.In the time of tangent line electromagnetic component 190 pull operation line 195, the upper end 262 of arm 260 by hook part 268 towards right-hand movement.Arm 260 rotates around the main clockwise direction of looking under state taking bolster 251 as fulcrum.Follow the rotation of arm 260, the first cam bit 266 moves towards left taking bolster 251 as fulcrum.The rearward end 122 of removing pin 120 moves to inclined plane part 267A above, and moves towards planar portions 267B on the first cam surface 267.The first cam surface 267 is removed pin 120 towards front pushing.Remove pin 120 and remove the tension force that main tension disk 110 applies upper thread.Follow the rotation of arm 260, the second cam bit 276 is taking bolster 251 as fulcrum towards right-hand movement.The rearward end 142 of switching pin 140 moves towards inclined plane part 277B from planar portions 277A on the second cam surface 277.The second cam surface 277 slows down the power of switching pin 140 towards front pushing.Switching pin 140 makes secondary tension disk 130 in upper thread being applied to the state of tension force.Therefore,, in alter mode, the arm 260 that one forms can be to removing pin 120 and switching the driving that pin 140 both sides transmit tangent line electromagnetic component 190.
In the time of tangent line, main tension disk 110 is removed moment that tension force applies and also can be started to apply early than secondary tension disk 130 moment of tension force.For example, the second cam bit 176 can change and form position, makes the rearward end 142 of switching pin 140 in the time making, be positioned at the planar portions 177B of the second cam surface 177.In this case, cam base portion 173 can be towards forming near the position skew of the bottom 172 of the second arm 170 than the position of above-mentioned embodiment.Sewing machines 1 creates main tension disk 110 and secondary tension disk 130 both sides and upper thread is not applied the state of tension force or main tension disk 110 and secondary tension disk 130 both sides and only upper thread applied the state of some tension force.Therefore, Sewing machines 1 can be after having removed and having residued in the tension force of upper thread after making, tension force when upper thread is applied to tangent line.Carry out tangent line under the state that remains the tension force while making time, may there is line run-bake-needle fault in Sewing machines 1 after tangent line,, line resilience occurs and situation about coming off from eedle 7 that is.Tension force while making by releasing, Sewing machines 1 can prevent line run-bake-needle fault.
Claims (10)
1. a Sewing machines, it comprises:
Eedle (7), it is penetrated with upper thread, utilizes the rotation of main shaft (41) and moves up and down;
Thread take-up tension lever (51), itself and moving up and down of above-mentioned eedle move up and down linkedly; And
Thread clamping mechanism (100), the upstream side that it is positioned at above-mentioned thread take-up tension lever on the feed path of upper thread, can apply tension force to upper thread;
This Sewing machines (1) is characterised in that,
Above-mentioned thread clamping mechanism comprises:
The first tension disk (110), it applies tension force to upper thread in the time making;
The second tension disk (130), it is positioned at the upstream side of above-mentioned the first tension disk on above-mentioned feed path, in the time making in having removed the state of the tension force that opposite line applies;
Cancel system (120), the tension force that it applies upper thread for removing above-mentioned the first tension disk;
Switching mechanism (140), it switches to the state that can apply to upper thread tension force for the state of explaining above-mentioned the second tension disk by oneself tension force except upper thread is applied;
Driving mechanism (150,250), it is synchronous above-mentioned cancel system and the above-mentioned switching mechanism of driving in the time of tangent line; And
Power source (190), it is for driving above-mentioned driving mechanism.
2. Sewing machines according to claim 1, is characterized in that,
This Sewing machines also comprises:
Tangent mechanism (90), it utilizes the driving force of above-mentioned power source to carry out work, for upper thread is cut off; And
Transmission member (195), it couples together above-mentioned power source and above-mentioned driving mechanism, for transmit the driving force of above-mentioned power source to above-mentioned driving mechanism.
3. Sewing machines according to claim 2, is characterized in that,
Above-mentioned driving mechanism comprises:
The first arm (160), it is the plate body extending between above-mentioned switching mechanism and above-mentioned cancel system, and mode support shaft (152) supporting of its first end (162) rotating, this first end is the end near above-mentioned that side of cancel system on the bearing of trend of this first arm (160);
The second arm (170), it is the plate body extending between above-mentioned switching mechanism and above-mentioned cancel system, and mode support shaft (153) supporting of its second end (171) rotating, this second end is the end near above-mentioned that side of switching mechanism on the bearing of trend of the second arm (170);
Support (151), its mode that can rotate with first connecting portion (161) of above-mentioned the first arm and second connecting portion (172) of above-mentioned the second arm supports respectively this first connecting portion and this second connecting portion, this first connecting portion is the end of the above-mentioned cancel system of distance on bearing of trend of above-mentioned the first arm that side far away, and this second connecting portion is the end of the above-mentioned switching mechanism of distance on bearing of trend of above-mentioned the second arm that side far away; And
Connecting portion (168), it is located at above-mentioned the first connecting portion, is connected with above-mentioned transmission member;
Above-mentioned the first arm has and first cam surface (167) of above-mentioned cancel system butt at above-mentioned first end;
Above-mentioned the second arm has and second cam surface (177) of above-mentioned switching mechanism butt at above-mentioned the second end;
Above-mentioned power source makes above-mentioned support, above-mentioned the first connecting portion and above-mentioned the second connecting portion position by above-mentioned transmission member and above-mentioned connecting portion is towards moving with the orthogonal direction of the bearing of trend of above-mentioned the first arm and above-mentioned the second arm, make respectively above-mentioned the first arm and above-mentioned the second arm rotate, thereby make above-mentioned the first cam surface drive above-mentioned cancel system, and make above-mentioned the second cam surface drive above-mentioned switching mechanism.
4. Sewing machines according to claim 2, is characterized in that,
Above-mentioned driving mechanism comprises:
Arm (260), it is the plate body extending between above-mentioned switching mechanism and above-mentioned cancel system;
The first cam surface (267), it is located at an end (261) of the bearing of trend of above-mentioned arm, with above-mentioned cancel system butt;
The second cam surface (277), it is located at the other end (262) of the bearing of trend of above-mentioned arm, with above-mentioned switching mechanism butt;
Bolster (251), its mode that can rotate with above-mentioned arm supports the bearing of trend central authorities of above-mentioned arm; And
Connecting portion (268), it is located at the other end of above-mentioned arm, is connected with above-mentioned transmission member;
Above-mentioned power source rotates above-mentioned arm by above-mentioned transmission member and above-mentioned connecting portion centered by above-mentioned bolster, thereby makes above-mentioned the first cam surface drive above-mentioned cancel system, and makes above-mentioned the second cam surface drive above-mentioned switching mechanism.
5. Sewing machines according to claim 3, is characterized in that,
This Sewing machines has following structure, and this structure, in the time that above-mentioned power source drives, makes above-mentioned the first cam surface drive above-mentioned cancel system before above-mentioned the second cam surface drives above-mentioned switching mechanism.
6. Sewing machines according to claim 4, is characterized in that,
This Sewing machines has following structure, and this structure, in the time that above-mentioned power source drives, makes above-mentioned the first cam surface drive above-mentioned cancel system before above-mentioned the second cam surface drives above-mentioned switching mechanism.
7. Sewing machines according to claim 5, is characterized in that,
This Sewing machines have can produce simultaneously above-mentioned the first tension disk Zi the state that upper thread is applied to tension force to removing state that the intermediateness of process of state of the tension force that upper thread is applied and above-mentioned the second tension disk explain the tension force except upper thread is applied by oneself to the structure of intermediateness of process of state that can apply tension force.
8. Sewing machines according to claim 6, is characterized in that,
This Sewing machines have can produce simultaneously above-mentioned the first tension disk Zi the state that upper thread is applied to tension force to removing state that the intermediateness of process of state of the tension force that upper thread is applied and above-mentioned the second tension disk explain the tension force except upper thread is applied by oneself to the structure of intermediateness of process of state that can apply tension force.
9. according to the Sewing machines described in any one in claim 1～8, it is characterized in that,
This Sewing machines also comprises:
Thread take-up spring (115), it is located at above-mentioned the first tension disk, follows the upper thread mobile by moving up and down of above-mentioned thread take-up tension lever to swing up and down; And
Limiting mechanism (180), it utilizes the above-mentioned thread take-up spring of power limit being transmitted by above-mentioned cancel system to swing up and down.
10. Sewing machines according to claim 9, is characterized in that,
Above-mentioned the first tension disk has the tension seat (111) of the frame that is fixed on above-mentioned Sewing machines;
Above-mentioned thread take-up spring is incorporated in above-mentioned tension seat, and outstanding from the periphery of above-mentioned tension seat;
Above-mentioned limiting mechanism comprises:
Stem portion (183), it is along the periphery setting of above-mentioned tension seat; And
Abutting part (184), it is positioned at the end of above-mentioned stem portion, relative with above-mentioned tension seat;
The power that above-mentioned stem portion utilization is transmitted by above-mentioned cancel system moves along the periphery of above-mentioned tension seat, thereby above-mentioned abutting part and above-mentioned tension seat are clipped in above-mentioned thread take-up spring between them and limit above-mentioned thread take-up spring and swing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013017945A JP2014147539A (en) | 2013-01-31 | 2013-01-31 | Sewing machine |
| JP2013-017945 | 2013-01-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203754973U true CN203754973U (en) | 2014-08-06 |
Family
ID=51250272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420045199.5U Expired - Lifetime CN203754973U (en) | 2013-01-31 | 2014-01-24 | Sewing machine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2014147539A (en) |
| CN (1) | CN203754973U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110205753A (en) * | 2018-02-28 | 2019-09-06 | 兄弟工业株式会社 | Sewing machine and line tension detection device |
| CN113089199A (en) * | 2021-04-08 | 2021-07-09 | 上海富山精密机械科技有限公司 | Intelligent thread tension balancing device for sewing machine and sewing machine |
-
2013
- 2013-01-31 JP JP2013017945A patent/JP2014147539A/en active Pending
-
2014
- 2014-01-24 CN CN201420045199.5U patent/CN203754973U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110205753A (en) * | 2018-02-28 | 2019-09-06 | 兄弟工业株式会社 | Sewing machine and line tension detection device |
| CN110205753B (en) * | 2018-02-28 | 2022-02-08 | 兄弟工业株式会社 | Sewing machine and thread tension detection device |
| CN113089199A (en) * | 2021-04-08 | 2021-07-09 | 上海富山精密机械科技有限公司 | Intelligent thread tension balancing device for sewing machine and sewing machine |
| CN113089199B (en) * | 2021-04-08 | 2022-06-21 | 上海富山精密机械科技有限公司 | Intelligent thread tension balancing device for sewing machine and sewing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2014147539A (en) | 2014-08-21 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140806 |
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| CX01 | Expiry of patent term |