CN108729044A - Sewing machine - Google Patents

Abstract

The present invention provides a kind of sewing machine.In having and crossing and reach the standard grade and capture and draw the sewing machine for the balance reached the standard grade, prevent the actuation cycles in the 1st needle from off-line and bouncing pilotage occurs.The balance (7) that sewing machine (1) has cross reach the standard grade (200) drawing lines (4) and capture and draw reach the standard grade (200).In such sewing machine (1), have by the baffle (820) moved in a manner of being present in the tank circuit (41) that can be situated between, the tank circuit (41) has drawing lines (4) in deep, and reach the standard grade (200) can be linked into, the baffle (820) is situated between every being present in the tank circuit (41) being linked into the when of reaching the standard grade (200).

Description

Sewing machine

Technical field

The present invention relates to a kind of sewing machine, having makes hooking portion mobile in a manner of crossing and reach the standard grade and utilizes the hooking The balance that portion captures and traction is reached the standard grade.

Background technology

Sewing machine is by forming the coil reached the standard grade and making to reach the standard grade in the coil reached the standard grade and offline friendship by offline be inserted through It knits and forms stitch.It reaches the standard grade and is inserted through in needle from roll, it is offline to be accommodated in spur in the state of being wound in peg or spindle In shuttle.Coil is formed by insert has the needle reached the standard grade to rise from lower dead center.The spur of shuttle captures coil, is capturing coil Shuttle rotates under state, and peg or spindle is drill-through to reach the standard grade, and thus reaches the standard grade and offline intertexture.Furthermore herein, as the preparation rank of sewing operations Section, roll is set on sewing machine by operator and including the line (reaching the standard grade) is inserted through in needle, in drawing lines Be arranged that the operation of the line (reaching the standard grade) is known as reaching the standard grade is linked into (or hanging wire).

In the device for being referred to as horizontal balance, hooking portion in a manner of crossing and reach the standard grade back and forth movement (for example, referring to patent Document 1, patent document 2).It is reaching the standard grade toward capturing on road, will reach the standard grade and draw as V shape in hook-shaped in the hooking portion of horizontal balance.It hooks It is separate from reaching the standard grade on the roads Xian Bufan, therefore the capture reached the standard grade is released.By these actions, including considerable amount of coil exists It is interior and generate (supply) stitch and form the required relaxation reached the standard grade, in addition optionally carry out the recycling (pull-up) of the relaxation.

In the past, if Operation switch disconnects, sewing machine makes needle stop in top dead centre.In horizontal balance, needle, which is in upper, to be stopped When point, the roads hooking Bu Ziwang rise to light to stop by the position into road after reaching the standard grade.Therefore, if being disconnected in Operation switch During exchange and reach the standard grade, then in the actuation cycles of the 1st needle after Operation switch is connected, hooking portion is from by past after reaching the standard grade Towards past road terminal in road.

If hooking portion into road from by being acted after reaching the standard grade, hooking portion can not be crossed initial into road Reach the standard grade, it is initial can not capture and draw into road reach the standard grade.It reaches the standard grade if can not capture and draw, generates following doubt：On Line not will produce relaxation, and the considerable amount of supply amount of coil is insufficient and spur can not be captured and be reached the standard grade.That is, there is the start week in the 1st needle Phase can not form the doubt of the so-called bouncing pilotage of stitch.

Therefore, it is proposed to a kind of roads hooking Bu Ziwang rise shut down when lighting in place between drawing lines sewing machine (such as With reference to patent document 2).In the sewing machine, after exchange of reaching the standard grade, certainly it can capture and draw from the actuation cycles of the 1st needle It reaches the standard grade, therefore reaches the standard grade and generate the considerable amount of relaxation of coil, and prevent the bouncing pilotage in the actuation cycles of the 1st needle.

However, the relaxation a great deal of reached the standard grade made in the actuation cycles of the 1st needle is possible to the presser feet from sewing machine Side and tensioner side supply of reaching the standard grade.Reason is：Stitch is not present in cloth, there is no caused by stitch for from presser feet side Supply obstruction.Which kind of degree is supplied from presser feet side and any one of tensioner side of reaching the standard grade, presser feet is depended on and reaches the standard grade and open The balance of the retentivity of reaching the standard grade of power device.

As the preparation before sewing, will be reached the standard grade from the extraction of the bottom side of presser feet by user.If the extraction is few, and due to The traction in hooking portion and largely reach the standard grade from the supply of presser feet side for coil a great deal of, then generate the institute to reach the standard grade from needle or cloth disengaging The doubt of the off-line of meaning.

In addition, sewing machine has flywheel.Flywheel is utilized when making needle rise and fall using manual operation.Drive needle mechanism with Drive the mechanism in hooking portion there are a part of common sparing, the manual operation of flywheel also will produce the displacement in hooking portion.Therefore, i.e., Just sewing machine is made to shut down when the roads hooking Bu Ziwang are lighted between drawing lines, sometimes also due to the hand of flywheel later It moves operation and hooking portion is made to be moved to the position for crossing drawing lines.

In the case where being operated manually to the flywheel, finally in the actuation cycles of the 1st needle, hooking portion can not capture And traction is reached the standard grade, the relaxation reached the standard grade has no sufficient ampleness, due to the pull-up reached the standard grade carried out using thread take-up spring, coil phase The supply amount of equivalent generates deficiency, and spur can not be captured and be reached the standard grade.That is, the bouncing pilotage in the actuation cycles for remaining the 1st needle that remain unchanged Doubt.

[existing technical literature]

[patent document]

[patent document 1] Japanese Patent Laid-Open 2-111392 bulletins

[patent document 2] Japanese Patent Laid-Open 2002-224481 bulletins

Invention content

[problem to be solved by the invention]

In this way, in having and crossing and reach the standard grade and capture and draw the sewing machine for the balance reached the standard grade, in the actuation cycles of the 1st needle In will produce the relaxation reached the standard grade it is few caused by off-line or the problems such as bouncing pilotage.The present invention is as described existing in order to solve The problem of technology and presenter, it is therefore intended that：In having and crossing and reach the standard grade and capture and draw the sewing machine for the balance reached the standard grade, Prevent the actuation cycles in the 1st needle from off-line and bouncing pilotage occurs.

[technical means to solve problem]

In order to reach the purpose, sewing machine of the invention is to make to reach the standard grade and offline friendship using the co-operating of needle and shuttle The sewing machine of stitch is knitted and formed, and is characterized in that having：Balance crosses the drawing lines reached the standard grade and captures and draws on described Line；The tank circuit has the drawing lines in deep, and can be linked into described reach the standard grade；And baffle, can be situated between every being present in the tank circuit Mode move, and change the drawing lines, the baffle is situated between when being linked into described reach the standard grade every being present in the tank circuit.

Or have：Presser feet presses object to be sewn；And pressing elevating lever (lever), so that the presser feet is lifted, The action of the baffle and the pressing elevating lever interlocks, and during the presser feet rises, the baffle is situated between described every being present in In the tank circuit.

Or have：It reaches the standard grade tensioner, tension pressure is assigned to reaching the standard grade；The tensioner of reaching the standard grade has：It clips described The movable plate and fixed disk and actuator reached the standard grade, the actuator make the movable plate be moved towards the fixed disk, the gear Plate passes through the actuator start.

Or have：Sensor, that reaches the standard grade described in detection is linked into, and the baffle is based on detecting using the sensor The result that goes out and carry out Jie towards the tank circuit every existing and keep out of the way.

Or the sensor being linked into reached the standard grade described in detection is whether detection has on described on the drawing lines The sensor of line.

Or the sensor being linked into reached the standard grade described in detection is the sensing of the lifting of the detection pressing elevating lever Device.

Or the sensor being linked into reached the standard grade described in detection is the sensor for the lifting for detecting the presser feet.

As long as described be linked into as described reach the standard grade is set to the drawing lines reached the standard grade.

[The effect of invention]

According to the present invention, since generation relaxation of reaching the standard grade can be made being linked into the time point reached the standard grade, after exchange of reaching the standard grade The actuation cycles of 1st needle generate off-line and the possibility of bouncing pilotage declines.

Description of the drawings

Fig. 1 (a), Fig. 1 (b) are the figure for indicating sewing machine and being integrally formed, and Fig. 1 (a) indicates that appearance, Fig. 1 (b) indicate internal The overview of composition.

Fig. 2 is the stereogram constituted in detail for indicating balance.

Fig. 3 is the figure for the motion track for indicating hooking portion.

Fig. 4 is the exploded perspective view of tensioner of reaching the standard grade.

Fig. 5 is the isometric front view of tensioner of reaching the standard grade.

Fig. 6 is the rear isometric view of tensioner of reaching the standard grade.

Fig. 7 is the block diagram of the composition for the controller for indicating sewing machine.

Fig. 8 (a), Fig. 8 (b) are the state for indicating the baffle in the case where being linked into the opportunity reached the standard grade (timing), and Fig. 8 (a) is upper The vertical view of line tension device, Fig. 8 (b) are the enlarged plan view near baffle.

Fig. 9 (a), Fig. 9 (b) are the baffle kept out of the way, and Fig. 9 (a) is the vertical view of tensioner of reaching the standard grade, and Fig. 9 (b) is near baffle Enlarged plan view.

Figure 10 is the schematic diagram of the state reached the standard grade after expression baffle is kept out of the way.

Figure 11 is the stereogram for the state for indicating the balance after flywheel operation.

Figure 12 is the side view of the state reached the standard grade in the state that thread take-up spring bounces.

Figure 13 (a), Figure 13 (b) are the stereogram for indicating presser feet, and Figure 13 (a) is the state for indicating presser feet and declining, Figure 13 (b) To indicate the state of presser feet rising.

Figure 14 is to indicate another vertical view of tensioner of reaching the standard grade.

[explanation of symbol]

1：Sewing machine

1a：Chain-drive section

1b：Lathe portion

3：Needle

4：Drawing lines

5：Shuttle

6：Sewing machine engine

7：Balance

8：It reaches the standard grade tensioner

9：Controller

21：Needle plate

22：Presser feet

31：Shank

41：The tank circuit

61：Upper axis

62：Crank mechanism

63：Lower axle

64：Gear mechanism

65：Belt pulley

71：Hooking portion

71a：Toward road

71b：Return road

71c：Toward road beginning

72：Gear mechanism

72a：Barrel worm gear

72b：Cylinder wheel

73：Crank arm

74：Balance body

75：Walking bar rod

91：Drive control part

92：Tension force portion

93：Baffle controls portion

94：Operation portion

100：Cloth

200：It reaches the standard grade

300：It is offline

221：Compression bar

222：Compression bar skewback

222a：Surface plate

222b：Elevating lever

223：Compressed spring

224：Press elevating lever

224a：1st cam body

224b：2nd cam body

224c：Grip part

225：Thread tension releasing lever

225b：Output end

801：Fixed disk

802：Movable plate

803：Transmission shaft

804：Push plate

807：Compressed spring

808：Tension sets bar

808a：Pressing plate

808b：Shank

809：Slot hole

810：Rotary engine

811：Gear

812：1st flat surface

813：Helicla flute

814：2nd flat surface

815：Bulge

816：Thread take-up spring

817：Coil part

818：Arm

819：Leading part

820：Baffle

821：Toggle-action lever

822：Base rod

823：Billet bar

824：Elongate posts

825：Crank-pin

826：Input lever

L, L '：Path length

Δ L, Δ L '：Length

Lmax：Haulage

Tr：Track

Specific implementation mode

(the 1st embodiment)

(overall structure of sewing machine)

It is described in detail with reference to the sewing machine of the 1st embodiment of attached drawing pair.Sewing machine 1 shown in Fig. 1 (a), Fig. 1 (b) It is household, the special or industrial device sewed to cloth 100, needle 3 is fallen on being placed in the cloth 100 of needle plate 21, is made Reach the standard grade 200 with it is offline 300 interweave and form stitch.The sewing machine 1 has：Shank 31, needle 3 is supported using front end and With the needle 3 together back and forth movement；And shuttle 5, have spur in periphery and is rotated together with the spur.

Shank 31 is extended vertically from the chain-drive section 1a of sewing machine 1 towards needle plate 21, and using the front end of 21 side of needle plate to needle 3 It is supported.It will be reached the standard grade and 200 be extracted out from roll by user, and be linked into the tank circuit formed in the chain-drive section 1a of sewing machine 1 In 41, it is inserted through needle 3, and then draw any amount, and is passed through along the bottom of presser feet 22.The slot bottom of the tank circuit 41 becomes sewing machine 1 The drawing lines 4 that reach the standard grade tensioner 8 and the balance 7 being had play a role.

Shuttle 5 has drum (drum) shape of the inner hollow of plane opening, vertically or horizontally pacifies relative to needle plate 21 Dress, and can rotate in a circumferential direction.The shuttle 5 has on circumferential surface to capture the spur of coil, is accommodated in inside Wind offline 300 peg or spindle.

Shank 31 is power source with shared sewing machine engine 6 with shuttle 5, is driven via respective transmission mechanism.? Link horizontal-extending upper axis 61 via crank mechanism 62 on shank 31.Crank mechanism 62 is converted to the rotation of upper axis 61 It moves along a straight line and is transferred to shank 31, thus shank 31 moves up and down.Furthermore flywheel 65 is installed on upper axis 61, can be passed through User manually come make 61 axis of upper axis rotate.

Shuttle 5 is provided in inside the lathe portion 1b of sewing machine 1, links horizontal extension via gear mechanism 64 on shuttle 5 Lower axle 63.In the case where shuttle 5 is horizontally disposed, gear mechanism 64 is the barrel worm gear that such as shaft angle is 90 degree.Gear The rotation of lower axle 63 is converted 90 degree and is transferred to shuttle 5 by mechanism 64, and thus shuttle 5 rotates horizontally.

In such sewing machine 1, by the back and forth movement of shank 31, needle 3 runs through cloth 100 with reaching the standard grade 200.Described When needle 3 rises from lower dead center, 200 formation coils of reaching the standard grade.Shuttle 5 is rotated when capturing coil using spur, extraction offline 300 Peg or spindle with the rotation of shuttle 5 drill-through coil.At this point, offline 300 also it is drill-through reach the standard grade 200 coil, reach the standard grade 200 with it is offline It is tightened up after 300 intertextures and forms stitch.

Act on the balance 7 of drawing lines 4 and tensioner 8 of reaching the standard grade reach the standard grade 200 extraction, reach the standard grade 200 tension force, on The relaxation of line 200 so extract out reach the standard grade 200 tension.As a result, control reach the standard grade 200 coil formed and stitch tension.

(balance)

Balance 7 shown in Fig. 2 is following device：With cross reach the standard grade 200 drawing lines 4 hooking portion 71, and pass through hooking The back and forth movement in portion 71 and repeating reach the standard grade 200 capture, traction and liberation in capture-process.Cross the hooking portion of drawing lines 4 The balance 7 in the 71 generally horizontal vertically extending sections for crossing drawing lines 4, the hooking portion 71 with horizontal back and forth movement is referred to as water Flat balance.

It is provided with to make the gear mechanism 72 of 71 horizontal movement of hooking portion on upper axis 61.The shape on the circumferential surface of upper axis 61 At there is barrel worm gear 72a, cylinder wheel 72b and barrel worm gear 72a with the axis orthogonal with upper axis 61 are ratcheting.By institute It states barrel worm gear 72a and cylinder wheel 72b forms gear mechanism 72.The gear mechanism 72 makes shaft angle be 90 degree, and will hang down The rotary motion faced directly is converted to the rotary motion on horizontal plane.

Cylinder wheel 72b doubles as crank gearing axis.It is elliptical plate to be linked in cylinder wheel 72b comprising shape (plate) crank arm 73.About crank arm 73, the bulging in the radial direction of a part of circumferential surface.The boomerang of obtuse angle opening (boomerang) the balance body 74 of shape is linked to the bulge of the crank arm 73 via crank-pin.Balance body 74 is by crank 73 side of arm has hooking portion 71 as cardinal extremity and in front end side.Walking bar rod 75 is linked to the curved of balance body 74 via crank-pin Qu Dian.One end of walking bar rod 75 is the fixing end for being connected to machine frame etc..

Furthermore in balance body 74, different in height from the point of contact of crank arm 73 and hooking portion 71, balance body 74 removes It bends to other than boomerang shape along the horizontal plane, section portion is set twice along short transverse bending, described section of portion make point of contact Side is different from 71 side height of hooking portion and extends.

If using the balance 7, hooking portion 71 is limited by walking bar rod 75, centered on the fixing end of walking bar rod 75 In the horizontal plane back and forth movement is carried out along arc-shaped.In addition, balance body 74 is limited by walking bar rod 75 and makes direction change, thus Hooking portion 71 by with centered on the point of contact of walking bar rod 75 in the horizontal plane along arc-shaped carry out back and forth movement.As shown in Figure 3 Like that, by the synthesis of two back and forth movement, hooking Bu71Wang road 71a follow different tracks from returning in the 71b of road.Hooking The roads Bu71Wang first half follows the track for being expanded to arc-shaped, and the rail that recess is arc-shaped is followed returning road latter half Mark.

As shown in Figures 2 and 3 like that, balance 7 is the arc-shaped to describe in the 71a first halfs of the roads hooking Bu71Wang Track is arranged with 200 mode intersected of drawing lines 4 of reaching the standard grade.In addition, the roads hooking Bu71Zi Wang sides of the beginning 71c towards drawing lines 4 Be formed as hook-shaped.Therefore, drawing lines 4 is crossed in the 71a of the roads hooking Bu71Wang, by 200 sides tangled that reach the standard grade present in drawing lines 4 Formula is captured, and is drawn in a manner of being quickly caught in and is reached the standard grade 200 moving on mobile.In addition, the roads hooking Bu71Fan In 71b with reach the standard grade 200 it is separate and will reach the standard grade 200 from trap state liberate, avoid drawing lines 4 and be back to road terminal, the roads Ji Wang Beginning 71c.

(tensioner of reaching the standard grade)

Fig. 4 is the exploded view of tensioner 8 of reaching the standard grade, and Fig. 5 is the isometric front view of tensioner 8 of reaching the standard grade.As shown in Figures 4 and 5 Like that, tensioner 8 of reaching the standard grade has face and is relatively fixed disk 801 and movable plate 802.Fixed disk 801 and movable plate 802 are at it Between clip 200 mode of drawing lines 4 of reaching the standard grade and be arranged.Movable plate 802 has ampleness by the transmission shaft 803 for reaching fixed disk 801 Ground runs through, and can be slided along the direction being separate with fixed disk 801.If movable plate 802 is contacted with fixed disk 801, pass through line Reaching the standard grade for road 4 200 is clipped by fixed disk 801 with movable plate 802,200 depressed power of reaching the standard grade.The pressing force is to reach the standard grade 200 Tension pressure.Reach the standard grade 200 by with movable plate 802 relative to the corresponding tension pressure of the contiguity intensity of fixed disk 801.

Hereinafter, fixed disk 801 is known as disk with the direction that movable plate 802 is separate separate direction, especially may be used The direction that Moving plate 802 is contacted with fixed disk 801 is known as disk and contacts direction, and the direction that 802 self-retaining disk 801 of movable plate leaves is claimed It is disk far from direction.In addition, before the direction of horizontal plane that is orthogonal with disk contact separation direction and extending along upper axis 61 is known as Direction from drawing lines 4 towards the entrance of the tank circuit 41 is especially known as front direction by rear direction, by the line from the entrance of the tank circuit 41 towards deep The direction in road 4 is known as rear direction.

Tensioner 8 of reaching the standard grade has in the back side of movable plate 802, i.e. with the face towards fixed disk 801 for opposite side The push plate (pusher) 804 of movable plate 802 is pushed towards fixed disk 801.Push rod 804 has multiple protrusions in 802 side of movable plate, can It is whole to movable plate 802 to apply uniform power and push.It is in the back side of push plate 804, i.e. with the face towards movable plate 802 Compressed spring 807 is arranged in opposite side.Push plate 804 is transmitted the insert of axis 803 with compressed spring 807, and compressed spring 807 is in disk Contact separation side upwardly extends.The front end of compressed spring 807 is connected to the back side of push plate 804.

Movable plate 802 is urged to fixed disk 801 by the applied force of compressed spring 807 via push plate 804, in movable plate Apply tension pressure corresponding with the shrinkage of compressed spring 807 between 802 and fixed disk 801.The tool of tensioner 8 of reaching the standard grade The standby tension for making compressed spring 807 shrink setting bar 808.

Tension sets opposite side of 808 folder of bar (rod) across compressed spring 807 and positioned at push plate 804.Tension sets bar 808 integrally have and are transmitted with the having ampleness perforative pressing plate 808a and orthogonal along separate direction contact with disk of axis 803 Front-rear direction extend shank 808b.Pressing plate 808a have the disc face identical or slightly wider with the outer diameter of compressed spring 807, It is chimeric with compressed spring 807 and from the center bulging of the disc face and the cylinder of embedded compressed spring 807.

Shank 808b is loosely inserted through along disk contact separation direction in the slot hole 809 of strip, and tension sets bar 808 by growing Hole 809 guides and is moved in parallel along disk contact separation direction.Tension sets bar 808 and is moved in parallel by contacting direction along disk, and Compressed spring 807 is set to shrink using pressing plate 808a.The shrinkage of compressed spring 807 is set the amount of movement of bar 808 by tension It determines.

The tensioner 8 of reaching the standard grade has the rotary engine 810 for making tension setting bar 808 move in parallel and gear 811.Rotation It is Stepping motor or servo to forward motivation 810.The rotary shaft of rotary engine 810 with gear 811 directly or via Other gear mesh.The flat surface of gear 811 and the shank 808b of tension setting bar 808 are in orthogonality relation.

It is formed with one side on the 1st flat surface 812 of gear 811 and describes spiral from the rotation center of gear 811 towards periphery The helicla flute 813 slowly extended on one side.The shank 808b of tension setting bar 808 is embedded in helicla flute 813.Gear 811 is convex Wheel, it is cam follower that tension, which sets bar 808,.If gear 811 rotates, tension sets 808 one side of bar and is limited by slot hole 809 System, is pushed from the central side of gear 811 to outer peripheral side on one side, and compressed spring 807 is made to be shunk along disk contact direction.On that is, The tension pressure of line 200 is controlled according to the rotation amount of rotary engine 810.

(thread take-up spring)

As shown in Figures 4 and 5 like that, thread take-up spring 816, which is attached to, reaches the standard grade on tensioner 8.The reply of thread take-up spring 816 is reached the standard grade 200 path lengths that relax and make drawing lines 4 generated increase, using the path length of growth come absorb reach the standard grade 200 slack.Institute The torsion spring that thread take-up spring 816 is made of metal wire rod is stated, there is portion coil (coil) 817 and arm (arm) 818.Arm 818 towards with The direction protrusion that the spool of coil part 817 is orthogonal extends, and is on the way implemented with multiple bending processes.

Coil part 817 is transmitted axis 803 and inserts embedding, and folder is located at across pairs of fixation disk 801 and movable plate 802 and compression The opposite side of spring 807.As an example of the tensioner 8 of reaching the standard grade, coil part 817 clip machine frame and with pairs of fixation disk 801 abut with movable plate 802.

Arm 818 extends annularly around great circle and along disk far from direction, crosses fixation disk 801 in column and movable plate 802, will The preceding end-rack of arm 818 is on transmission shaft 803.About arm 818, the two straight line wrists for crossing U-shaped as the crow flies in positive side are utilized Imaginary line and bending machining are at an angle of 90 degrees, are in L words or V shape if being observed from the direction of the spool along coil part 817.Arm 818 overbending direction is consistent with the coiling direction of coil part 817.

In the thread take-up spring 816, the U-shaped bending section of arm 818 is functioned as leading part 819.It will by user It reaches the standard grade and 200 is linked into leading part 819, the applied force bounced in arc-shaped in addition is applied to leading part 819 by coil part 817.Draw 200 forces that line portion 819 was tightened up reach the standard grade, with along tension reach the standard grade 200 be formed by drawing lines 4 mode it is depressed.Separately On the one hand, about leading part 819, if reaching the standard grade 200 generations relaxation, the applied force accumulated using coil part 817 is caught on one side 200 one sides of reaching the standard grade are bounced in arc-shaped, and making to reach the standard grade 200 is formed by the bending of drawing lines 4, in other words, the path length of drawing lines 4 is made to increase Add, using drawing lines 4 absorb reach the standard grade 200 slack.

In addition, when that will reach the standard grade 200 hanging wires in drawing lines 4, reach the standard grade 200 is linked into seam in a manner of being contacted with leading part 819 It threads in machine 1.At this point, since arm 818 is bent in V shape, thus it is formed with front in 200 side that is linked into of reaching the standard grade and is installed on leading part 819 receiving port, so the both sides of leading part 819 be formed with prevent reach the standard grade 200 the guide line (guideline) to fall off.

(baffle)

As shown in Figures 4 and 5 like that, baffle 820 is set up in the tensioner 8 of reaching the standard grade.Baffle 820 is reaching the standard grade 200 Setting or exchange, i.e. hanging wire when Jie every being present in the tank circuit 41, will be blocked between the entrance of the tank circuit 41 and drawing lines 4.In addition, hanging Enter after reaching the standard grade 200, baffle 820 is kept out of the way from the tank circuit 41.As a result, reach the standard grade 200 exchange when, reach the standard grade 200 does not have along 4 ground of drawing lines Relaxation.Baffle 820 be extended be in the one end of toggle-action lever 821 positioned at the tank circuit 41 side barrier plate.

The baffle 820 is rotated in arc-shaped centered on the crank-pin 825 of toggle-action lever 821 and is intervened in the tank circuit 41.It is bent Shank 821 is provided integrally with base rod 822, the billet bar 823 extended from the bending of one end of base rod 822 and from base rod The elongate posts 824 that 822 other end bending extends, whole is in substantially U-shaped of the both ends towards equidirectional bending.Furthermore in this reality It applies in mode, elongate posts 824 are separately formed with base rod 822, are coupled with base rod 822 using screw etc..

The end for making billet bar 823 is contacted with the 2nd flat surface 814 of gear 811 (with reference to Fig. 6).2nd flat part 814 is It is formed with the opposing face of the 1st flat surface 812 of helicla flute 813.Base rod 822 extends to logical from gear 811 towards disk contact direction Until crossing compressed spring 807 in column, movable plate 802 and fixed disk 801, substantially central portion using crank-pin 825 rotationally It is pivotally supported.

Elongate posts 824 pass through the side of pairs of movable plate 802 and fixed disk 801 and cross drawing lines 4, extend to the tank circuit 41 Entrance side until.The front end of the elongate posts 824 is rolled over and is extended towards 41 lateral bending of the tank circuit, and the prolongation is baffle 820.Furthermore in order to make baffle 820 intervene the tank circuit 41 in 3 side of needle compared to thread take-up spring 816, elongate posts 824 are towards sewing machine Lathe portion rolls and is tiltedly bent.

As shown in Figure 6, it is formed with the ladder extended within the scope of the certain angle of gear 811 on the 2nd flat surface 814 The bulge 815 of shape.The forming position of bulge 815 is that the billet bar 823 of toggle-action lever 821 is described on the 2nd flat surface 814 Motion track on.If gear 811 is rotated using rotary engine 810, the billet bar 823 1 of bulge 815 and toggle-action lever 821 It causes, then billet bar 823 is urged upwardly, and elongate posts 824 rotate centered on crank-pin 825 and in a manner of close to the tank circuit 41. The baffle 820 for being set to one end of elongate posts 824 as a result, intervenes the tank circuit 41.

On the contrary, if gear 811 carries out reverse rotation, the billet of bulge 815 and toggle-action lever 821 using rotary engine 810 Bar 823 is inconsistent, then billet bar 823 drops to the 2nd flat surface 814, and elongate posts 824 are centered on crank-pin 825 and with from slot The separate mode in road 41 rotates on the contrary.The baffle 820 for being set to one end of elongate posts 824 as a result, is kept out of the way from the tank circuit 41.

Furthermore the forming position of bulge 815 is when tension setting bar 808 is located at center or the most external of helicla flute 813 It is that the billet bar 823 of toggle-action lever 821 climbs up the position of bulge 815.That is, in tensioner 8 of reaching the standard grade to 200 application tension pressures of reaching the standard grade In the state of power, baffle 820 is not involved in the tank circuit 41.

(controller)

Fig. 7 is the block diagram of the composition for the controller 9 for indicating sewing machine 1.As shown in Figure 7, interior in sewing machine 1 to set The controller 9 of control sewing machine engine 6 and tensioner 8 etc. of reaching the standard grade.Controller 9 includes so-called computer or microcomputer and periphery Device.Computer or microcomputer have the operation control for being also known as central processing unit (Central Processing Unit, CPU) Device processed, be also known as the read only memory (read only memory, ROM), store program and the memory of data, with And it is also known as the working storage of random access memory (random access memory, RAM).Peripheral device includes to make For sewing machine engine 6 or the operation portion 94 of the reach the standard grade motor drive of tensioner 8 etc. and the input link of user.Operation Portion 94 is touch screen or dial or foot controller etc..

The controller 9 at least has the drive based on calculation control unit and motor drive by the execution of program Dynamic control unit 91 and tension force portion 92 and baffle controls portion 93.If being stopped operation to the input of operation portion 94, drive control part 91 stop drive signal of the output to sewing machine engine 6 on defined opportunity.The output of drive signal stops opportunity as balance 7 Hooking portion 71 be located at toward road beginning when.

Tension force portion 92 controls tensioner 8 of reaching the standard grade.Specifically the rotation amount of rotary engine 810 is controlled.Described Force control unit 92 makes rotary engine 810 rotate according to tension information is reached the standard grade, make fixed disk 801 in the clamping of movable plate 802 Pressing force is applied to and reaches the standard grade 200 by line 200.Tension information of reaching the standard grade be input in operation portion 94 determining for reaching the standard grade The content of 200 tension, and be the seams such as the amplitude of the selection of quality etc. or sew style, cloth feed amount, cloth thickness, sewing velocity, needle It threads condition.

Until baffle controls portion 93 makes the driving of rotary engine 810 until baffle 820 intervenes the tank circuit 41, prevent to reach the standard grade 200 It is linked into a manner of reaching drawing lines 4.The driving opportunity of rotary engine 810 be reach the standard grade 200 swap time.For example, existing in advance The entrance setting of the tank circuit 41 detects 200 proximity sensor (not shown) being linked into drawing lines 4 of reaching the standard grade.It is set when in drawing lines 4 It is equipped in the case of reaching the standard grade 200, is detected using proximity sensor and reach the standard grade 200.On the other hand, if due to trimming or line exchange It will reach the standard grade and 200 be removed from drawing lines 4, then proximity sensor, which can not detect, reaches the standard grade 200.Baffle controls portion 93 is with crank as a result, The mode that the billet bar 823 of bar 821 climbs up bulge 815 makes rotary engine 810 drive.

(effect)

As shown in Fig. 8 (a), Fig. 8 (b), reach the standard grade 200 swap when, baffle controls portion 93 200 is linked into reaching the standard grade Before so that baffle 820 is moved in advance between the entrance of the tank circuit 41 and drawing lines 4.That is, in advance driving rotary engine 810, and make Bulge 815 is consistent with the billet bar 823 of toggle-action lever 821.Billet bar 823 is urged upwardly, and thus toggle-action lever 821 is with crank-pin 825 rotate for center line, and elongate posts 824 close to the tank circuit 41, intervene in the tank circuit 41 by the baffle 820 for being set to the front end of elongate posts 824.

If being linked into the state that baffle 820 intervenes the tank circuit 41 and reaching the standard grade 200, reaching the standard grade 200 becomes following state：It can not arrive It is hooked on baffle 820 up to drawing lines 4.At this point, reach the standard grade 200 path length compared with reaching the standard grade 200 along the path length L of drawing lines 4 long Δ L。

Secondly, as shown in Fig. 9 (a), Fig. 9 (b), about tension force portion 92, when the actuation cycles in the 1st needle make day Before putting down 7 pairs of 200 carry out drawing-in motions of reaching the standard grade, i.e., before drive control part 91 makes sewing machine engine 6 drive, believed according to upper line tension It ceases and rotary engine 810 is made to rotate, using movable plate 802 with fixed disk 801 to 200 application tension pressures of reaching the standard grade.Furthermore institute The actuation cycles for calling the 1st needle refer to the initial actuation cycles that proximity sensor detects to reach the standard grade after 200 be linked into, and are to set Set or exchange the initial needle after reaching the standard grade 200 or after the sewing comprising trimming action is interrupted in stitch formation action Back and forth movement.

At this point, using tension force portion 92, the billet bar 823 of toggle-action lever 821 declines from bulge 815, and baffle 820 is from slot Keep out of the way on road 41.In this way, as shown in Figure 10, reach the standard grade for 200 for what is extended according to the path length by baffle 820, Even if into drawing lines 4, the relaxation by length Δ L amounts also only will produce.

As shown in Figure 10, make the driving of sewing machine engine 6 in drive control part 91 and balance 7 is caught using hooking portion 71 It catches and draws when reaching the standard grade 200, a part of haulage Lmax is carried using the slack caused by 200 that makes to reach the standard grade of baffle 820 For.Therefore, by using the traction of balance 7 and from 22 side of presser feet supply reach the standard grade 200 line amount maximum also just be Lmax- Δs L And reduce, and the so-called off-line in the actuation cycles of the 1st needle after 200 exchanges of reaching the standard grade is inhibited.

If in addition, operating flywheel 65, as shown in Figure 11, hooking portion 71 sometimes in the stopped process of sewing machine 1 Stop from drawing lines 4 is crossed toward road beginning.If exchanging reach the standard grade 200 in this condition, in the actuation cycles hooking portion 71 of the 1st needle It can not capture and draw and reach the standard grade 200.Therefore, can not be made using balance 7 reach the standard grade 200 coil amount.

But as shown in Figure 12, it after 200 just exchanges of reaching the standard grade, is generated compared to thread take-up spring by baffle 820 816 reach the standard grade 200 when path length L ' for Δ L ' amounts relaxation.Therefore, even if in the actuation cycles hooking portion 71 of the 1st needle It can not capture and draw and reach the standard grade 200, and then thread take-up spring 816 reaches the standard grade 200, reach the standard grade 200 also remaining with length Δ L ' amounts It is abundant, therefore the doubt for generating so-called bouncing pilotage is reduced.

(effect)

In this way, the balance 7 that the sewing machine 1 has cross reach the standard grade 200 drawing lines 4 and capture and draw and reach the standard grade 200.? In such sewing machine 1, have by baffle 820 that is mobile and changing drawing lines 4, the slot in a manner of being present in the tank circuit 41 of being situated between Road 41 has drawing lines 4 in deep, and can be linked into and reach the standard grade 200, and the baffle 820 is situated between every being present in the tank circuit being linked into the when of reaching the standard grade 200 In 41.

200 are reached the standard grade if being linked into as a result, and described reach the standard grade 200 will not reach drawing lines 4 and hook on baffle 820, and along drawing lines 4 state increases compared to path length.Therefore, if baffle 820 is kept out of the way from the tank circuit 41,200 generations of reaching the standard grade relaxation.Therefore, upper The 200 line amount of coil forming amount of reaching the standard grade in the actuation cycles of the 1st needle after the exchange of line 200 will not be insufficient, to prevent The bouncing pilotage of meaning and off-line.

In addition, in baffle 820 be attached to reaching the standard grade tensioner 8.That is, using making movable plate 802 be moved towards fixed disk 801 Actuator makes 820 start of baffle.As a result, using same actuator carry out tension pressure control with reach the standard grade 200 exchange when Loose makes, and the cost cutting of sewing machine 1 is brought due to the reduction of part number of packages.

Furthermore it is described as long as sewing machine 1 has the structure that baffle 820 can be made to intervene and keep out of the way relative to the tank circuit 41 Any one of known composition can also be used in actuation mechanism.For example, other than rotary engine 810, it also can be in solenoid coil (solenoid) or the front end of the actuator of the generations linear motion such as voice coil (voice coil) engine disposes baffle 820, profit The solenoid coil or voice-coil motor are controlled with controller 9.

(the 2nd embodiment)

It is described in detail with reference to the sewing machine 1 of the 2nd embodiment of attached drawing pair.For the phase isomorphism with the 1st embodiment At and identical function enclose the same symbol and detailed description will be omitted.

As shown in Figure 13 (a) and Figure 13 (b), the presser feet 22 of sewing machine 1 can be along the direction liter being separate with cloth 100 Drop.Presser feet 22 liberates the cloth 100 clipped by needle plate 21 and presser feet 22 by rising and reaches the standard grade 200.Therefore, rise in presser feet 22 It period, cloth 100 and reaches the standard grade 200 commutative.

Such presser feet 22 can detachably be installed on the front end of compression bar 221.The sole of presser feet 22 be situated between every cloth 100 and towards Needle plate 21.Compression bar 221 is placed in sewing machine machine frame, is extended vertically towards needle plate 21, can be lifted along bar axis direction.Pass through compression bar 221 rising, presser feet 22 liberate cloth 100 and reach the standard grade 200, and by the decline of compression bar 221, presser feet 22 is by compress 100 and reaches the standard grade 200。

Herein, compression bar skewback 222 is fixed on compression bar 221.Compression bar 221 is coped with the displacement of compression bar skewback 222 and is lifted.Pressure Bar skewback 222 includes the surface plate 222a being mounted on compression bar 221 and the elevating lever from surface plate 222a extensions 222b。

Surface plate 222a is orthogonal with the axis of compression bar 221 and extends, and is fixed on the compression bar 221 inserted using fastening etc. On.For the viewpoint of intensity, being extended on the surface plate 222a has reinforcing plate, is formed with comprising surface plate 222a's U-shaped shape.Elevating lever 222b extends from surface plate 222a.The elevating lever 222b is along orthogonal or oblique with the axis of compression bar 221 Direction extends.

It is provided with compression bullet on one side in the upper surface of surface plate 222a, in other words, in opposite with the face of 22 side of presser feet Spring 223.Compressed spring 223 is coaxial with compression bar 221 and one end is made to drop to surface plate 222a, and the other end, which becomes, is fixed on sewing machine The fixing end of machine frame.The distance between fixing end and surface plate 222a are shorter than the drift of compressed spring 223.That is, compression bullet Spring 223 is reduced and is inserted by compression bar 221, is exerted a force always towards descent direction to compression bar skewback 222.

If pressing upwards on the elevating lever 222b of compression bar skewback 222, the compression bar 221 of compression bar skewback 222 is fixed with to resistance to compression The applied force of contracting spring 223 and rise, if elevating lever 222b declines, by the applied force of compressed spring 223 under compression bar 221 Drop.

Elevating lever 222b is supported from the depressed elevating lever 224 in lower section.Pressing elevating lever 224 is using pin and rotationally By the stock (rod) that axis supports, the 1st cam body 224a, the 2nd cam body 224b and grip part 224c are formed in each portion. 1st cam body 224a is to be extended around rotary shaft and will rotate axial side as the plane cam of cam surface.2nd cam Body 224b is to be arranged in parallel and will rotate axial side in a thickness direction with the 1st cam body 224a as cam surface Plane cam.Grip part 224c is the bar that self-forming has the base portion of the 1st cam body 224a and the 2nd cam body 224b to extend.

That is, the 1st cam body 224a is the plate along the dilatation shaft of compression bar 221, have in a manner of through plate plane loosely Insert has pin and the rotary shaft orthogonal with the extending direction of compression bar 221 and elevating lever 222b.1st cam body 224a is compared to lifting Bar 222b and the lower section for being configured at 22 side of presser feet, upper side is placed in by elevating lever 222b.Upper side makes flat surface and inclined surface Connection, the front end of elevating lever 222b touches inclined surface.The inclined surface rises to elevating lever 222b.

Grip part 224c extends from the side of the 1st cam body 224a, and exposing can be held to the outside of sewing machine 1 by user It holds.If towards inclined surface be abrupt slope direction rotate grip part 224, elevating lever 222b by the 1st cam body 224a by upward It lifts, thus compression bar 221 and presser feet 22 rise.

2nd cam body 224b has the plate shape of substantially elliptical, side by side with the 1st cam body 224a.In other words, it presses The thickness range of half is the 1st cam body 224a in the side of elevating lever 224, other the other half thickness ranges are the 2nd cam Body 224b.The cam surface of thread tension releasing lever 225 and the 2nd cam body 224b.Thread tension releasing lever 225 is the bar of substantially linear.

The central part of the thread tension releasing lever 225 is rotatably supported by axis using pin.One end self-marketing is towards the 2nd cam body 224b extends, and is contacted from 221 side of compression bar with the 2nd cam body 224b.Therefore, the output end 225b of thread tension releasing lever 225 passes through grip part The rotation of 224c and tilted to the direction far from compression bar 221.

As shown in Figure 14, the track Tr intermediaries that thread tension releasing lever 225 rotates by rotating grip part 224c by user Every there are input levers 826.Input lever 826 extends from the toggle-action lever 821 for tensioner 8 of reaching the standard grade.That is, user rotates grip part 224c, thread tension releasing lever 225 is towards making the direction of 826 displacement of input lever be pulled to, and thus baffle 820 rotates.

Input lever 826 extends from base rod 822.More specifically, extend between billet bar 823 and elongate posts 824, from short Bar 823 is observed, and the direction risen when billet bar 823 climbs up bulge 815 is present in.The output end 225b of thread tension releasing lever 225 Between billet bar 823 and input lever 826, operated by the output end 225b run-off the straights of thread tension releasing lever 225 by user When, it is moved along from input lever 826 towards the direction of elongate posts 824.

Therefore, if being operated by the output end 225b run-off the straights of thread tension releasing lever 225 by user, the output end 225b Input lever 826 is pushed over towards 824 side of elongate posts, elongate posts 824 also rotate in a manner of being left from input lever 826, and baffle 820 is intervened In the tank circuit 41.

In this way, the sewing machine 1 of present embodiment has the pressing elevating lever 224 for making presser feet 22 lift, the pressing is made to rise The action for dropping action and the baffle 820 of bar 224 interlocks, and during presser feet 22 rises, baffle 820 is made to be situated between every being present in the tank circuit 41 In.

Reach the standard grade 200 be linked into be make presser feet 22 rise in the state of carry out.It reaches the standard grade that is, the rising of presser feet 22 becomes 200 signal being linked into.Therefore, when presser feet 22 rises, if baffle 820 is made to be situated between every being present in the tank circuit 41,200 are reached the standard grade not It can reach in drawing lines 4 and hook on baffle 820.Therefore, reach the standard grade 200 exchange after the 1st needle actuation cycles in, reach the standard grade The line amount of 200 coil forming amount will not be insufficient, to prevent so-called bouncing pilotage and off-line.

And say, in the sewing machine 1, can also carry certainly illustrate in embodiment 1 using rotary engine 810 The shifting of the baffle 820 interlocked with the action of pressing elevating lever 224 illustrated in the mobile mechanism of baffle 820 and embodiment 2 This two of motivation structure.Therefore, illustrate in using the mobile mechanism of the baffle 820 of rotary engine 810 and embodiment 2 Using pressing elevating lever 224 baffle 820 mobile mechanism in, setting interrupter so that respective action will not be by another The influence of the action of one.For example, when baffle 820 using rotary engine 810 groove portion can be situated between every exist act the case where Under, by the contact of bulge 815 and billet bar 823, toggle-action lever 821 is rotated centered on crank-pin, and baffle 820 is situated between every presence In the tank circuit 41.Meanwhile input lever 826 is also moved towards disk far from direction.That is, due to the output of input lever 826 and thread tension releasing lever 225 225b isolation is held, therefore the action for pressing elevating lever 224 will not be caused using the action of the baffle of rotary engine 810 820 It influences.

Conversely, working as in baffle 820 not in the state that rotary engine 810 is acted by that can be situated between in the way of existing, such as Described in upper with the action gearing of pressing elevating lever 224 and in the case of the rotation of toggle-action lever 821, since billet bar 823 can be from gear 811 isolation, therefore the rotation of toggle-action lever 821 will not impact gear 811.

That is, such case refers to the barrier driving mechanism of the action gearing of Ke And Let and pressing elevating lever 224 and utilizes rotation Forward the barrier driving mechanism of motivation 810.Even if the barrier driving mechanism especially interlocked with the action of pressing elevating lever 224 is not It puts into the state of the power supply of the main body of sewing machine 1 and also correctly functions, therefore by And Let barrier drivings mechanism, according to The state of sewing machine 1 when operating condition or hanging wire, operator can selectively use them, to realize really Hanging wire.

(variation)

In the 2nd embodiment, the rising of presser feet 22 is made to be interlocked with the mechanically moving of baffle 820.It is not limited to This, may also set up the sensor of the rising of detection presser feet 22, compression bar 221 or pressing elevating lever 224, utilizes signal wire to connect and senses Device and controller 9, the detection signal of sensor is input in controller 9, and baffle controls portion 93 makes to reach the standard grade the rotation of tensioner 8 Engine 810 drives.

As sensor, proximity sensor can be listed below：It is configured at presser feet 22, compression bar 221 or pressing elevating lever 224 Nearby, it and detects the close of presser feet 22, compression bar 221 or pressing elevating lever 224 or deviates from, but not limited to this.

(other embodiment)

Embodiments of the present invention are illustrated as described above, but can without departing from the spirit of the invention into Row is various to be omitted, displacement, changes.Moreover, the embodiment or its deformation are contained in the range or purport of invention, and include In the range with the invention described in claim for equalization.

Claims (8)

1. a kind of sewing machine, using the co-operating of needle and shuttle come make to reach the standard grade with offline intertexture and form stitch, and the seam The machine of threading is characterized in that having：

Balance crosses the drawing lines reached the standard grade and captures and reaches the standard grade described in traction；

The tank circuit has the drawing lines in deep, and can be linked into described reach the standard grade；And

Baffle is moved by that can be situated between in a manner of being present in the tank circuit, and changes the drawing lines,

The baffle is situated between when being linked into described reach the standard grade every being present in the tank circuit.

2. sewing machine according to claim 1, it is characterised in that have：

Presser feet presses object to be sewn；And

Elevating lever is pressed, the presser feet is made to lift,

The action of the baffle and the pressing elevating lever interlocks, and during the presser feet rises, the baffle is situated between every being present in In the tank circuit.

3. sewing machine according to claim 1 or 2, it is characterised in that have：

It reaches the standard grade tensioner, tension pressure is assigned to described reach the standard grade,

The tensioner of reaching the standard grade has：

The movable plate reached the standard grade and fixed disk and actuator are clipped,

The actuator makes the movable plate be moved towards the fixed disk,

The baffle passes through the actuator start.

4. sewing machine according to claim 1, it is characterised in that have：

Sensor, that reaches the standard grade described in detection is linked into,

The baffle carries out Jie towards the tank circuit based on the result detected using the sensor every existing and keep out of the way.

5. sewing machine according to claim 4, it is characterised in that：

The sensor being linked into reached the standard grade described in detection is to detect whether to have the sensor reached the standard grade on the drawing lines.

6. sewing machine according to claim 2, it is characterised in that have：

Sensor detects the lifting of the pressing elevating lever,

The baffle carries out Jie towards the tank circuit based on the result detected using the sensor every existing and keep out of the way.

7. sewing machine according to claim 2, it is characterised in that have：

Sensor detects the lifting of the presser feet,

The baffle carries out Jie towards the tank circuit based on the result detected using the sensor every existing and keep out of the way.

8. according to the sewing machine described in any one of claims 1 or 2 or 4 or 5, it is characterised in that：

Described be linked into is that described reach the standard grade is set in the drawing lines reached the standard grade.