CN2270741Y - Three-needle multi-thread flat seaming machine - Google Patents

Abstract

The utility model relates to a three-needle multi-thread flat seaming machine, mainly composed of a needle rod mechanism, a flat seaming needle mechanism, a curved needle mechanism, a feeding mechanism, a knee lifting/pressing and thread releasing mechanism, a thread flattening mechanism, etc. The utility model uses three straight needles, one curved needle, and one flat seaming needle to do different sewing operations; the utility model can do three-needle flat sewing and collar rolling, edge rolling to middle thin fabric, such as various cotton sweaters, undershirts, etc., and can also do double-needle flat sewing and single-needle collar rolling.

Description

A kind of three pin flat seaming machines

The utility model relates to a kind of sewing mechanical equipment.

At present, the three pin flat seaming machines of selling on the domestic and international market, volume is big, mechanism is complicated, cost an arm and a leg, and is special-purpose machine, and purposes is single, and narrow application range is difficult to satisfy the needs of medium-sized and small enterprises and individual apparel industry.

It is little, in light weight, simple in structure that task of the present utility model provides a kind of volume, and three pin flat seaming machines of energy a tractor serves several purposes.

Of the present utility model being characterised in that: it is made of following mechanism:

Body profile: constitute key main body by support [6] and head [3], flywheel [1] is installed in the right-hand member head of main shaft [14], flywheel case [2], lower encioser [4], food tray [5], seam platform [7], needle plate [8], upper encloser [13] are installed in respectively on the support [6], pin case [9], wire pressing device assembly [10], lift and press lever [11], rear casing [12] to be installed in respectively on the head [3];

Needle bar mechanism: it is by shank link assembly [15], wobble crank [16], last axle [17], swing connecting bar [18], chain section pin [19], chain section [20], shank joint [21], shank [22], pin folder [23], staight needle [24] is in series, shank link assembly [15] two ends are connected with steel marble ball pivot on the wobble crank [16] with main shaft [14] respectively, last axle [17] is contained in the upper shaft hole on the head [3], swing connecting bar [18] and wobble crank [16] are fastened on respectively on the two ends of axle [17], shank [22] is contained in the needle bar hole of head [3] left end, and affixed with shank joint [21];

The pin mechanism of stretching tight: it is by swing connecting bar [26], sliding axle [31], chain section joint [29], chain section [34], chain section pin [35], chain section crank [36], needle shaft [33] stretches tight, punch block [37] stretches tight, the pin [38] that stretches tight is in series, resting guide [28] is fastened on head [3] left side, the back side, sliding axle [31] one ends are contained in the survey chute of resting guide [28], can horizontally slip along chute, affixed chain section joint [29] and socket swing connecting bar [26] on the axostylus axostyle, the other end spins and prevents axially outer collar [30] of moving, and swing connecting bar [26] is connected on the wobble crank [16] by screw axis [27] and nut [25];

Bending needing mechanism: it is made up of looper swing mechanism looper travel mechanism two parts;

The looper swing mechanism: it is installed between main shaft [14] left end head and the curved needle shaft [44], by large needle crank [39], large needle link assembly [40], looper drives crank [41], chain section [34], chain section joint [42], chain section [34], the driven crank of looper [43], curved needle shaft [44], looper frame [45], looper [46] is in series, large needle link assembly [40] two ends are connected with the steel marble ball pivot that looper drives on the crank [41] with large needle crank [39] respectively, chain section [34] drives crank [41] with looper, chain section joint [42], connect with chain section pin [35] between the driven crank of looper [43], looper drives crank [41] and is installed on the looper driving crank axle that is fixed on the support [6], can swing up and down;

Looper travel mechanism: it is made up of looper cam [47], swing connecting bar [48], pin [49], wobble crank [50], small rod [51], looper small rod [52], small rod slide block [53], curved needle shaft [44], looper frame [45], looper [46], looper cam [47] one ends are contained on the main shaft [14], one end is connected with wobble crank [50] by pin [49], wobble crank [50] other end is contained on the small rod axle [51], looper small rod [52] two ends are fixed in respectively on small rod axle [51] and the small rod slide block [53], and small rod slide block [53] is contained on the curved needle shaft [44];

Presser foot device: it by live presser foot component [54], presser bar spring bracket [55], presser bar [56], depression bar spring [57], pressure regulating screw [58], lift and press a piece [59], spanner [60], spanner screw [61] to constitute, presser bar [56] is installed in the presser bar hole of head [3] left end, depression bar spring [57], pressure regulating screw [58] are sleeved on presser bar [56] upper end, pressure regulating screw [58] also spins with depression bar screw on the head [3], presser bar spring bracket [55] is fastened on presser bar [56] lower end, and be connected with the needle shaft that stretches tight [33], lift and press a piece [59] to be installed on the head [3];

Feed mechanism: it is made up of traverse mechanism before and after the feeding tooth and feeding tooth up-down mechanism two parts;

Traverse mechanism before and after the feeding tooth: it is by feeding cam [62], feeding connecting rod [63], needle gage is regulated crank [64], needle gage adjustment screw [65], crank of tooth frame axle [66], crank of tooth frame [67], pin [68], retainer [69], feeding tooth [72] constitutes, feeding cam [62] is installed on the main shaft [14], feeding connecting rod [63] is installed in needle gage with needle gage adjustment screw [65] and regulates in the arc groove of crank [64], needle gage is regulated crank [64] and is packed on the sleeve pipe of crank of tooth frame [67], crank of tooth frame [67] is contained on the crank of tooth frame axle [66], feeding tooth [72] is fixed on the retainer [69], and is connected with crank of tooth frame [67] by pin [68];

Feeding tooth up-down mechanism: it by tooth lifting cam [71], lift tooth connecting rod [70], retainer [69], feeding tooth [72] and constitute, tooth lifting cam [71] is contained on the main shaft [14], and suit lifts tooth connecting rod [70], lifts tooth connecting rod [70] upper end minor axis and matches with retainer [69] front end axis hole;

The moving pressure-raising of foot, thread releasing mechanism: it presses lever [11] by lifting, screw [77], promote screw [61], wire pressing device support plate [73], wire pressing device assembly [10], thread tension releasing disc [74], spring [76], loose ends lever [75] constitutes, wire pressing device support plate [73] and installation wire pressing device assembly [10] onboard, thread tension releasing disc [74] is contained in head [3] right-hand member, tension is connected with head [3] with thread tension releasing disc [74] lower end respectively at spring [76] two ends, lift and press lever [11] to be installed in head [3] back side, with screw [77] is fulcrum, head [3] right side is equipped with loose ends lever [75], and rabbets with the notch on the thread tension releasing disc [74];

Stroke line mechanism: it by stroke line cam [79], line crossing bracket assembly [78] is formed, stroking line cam [79] is sleeved on the large needle crank [39], line crossing bracket assembly [78] is installed near on the support that strokes line cam [79] [6] left side, wire-blocking board on the line crossing bracket assembly [78], cross the line plate and to stroke line cam [79] notch and both sides staggered, and leave the gap.

The utlity model has following advantage: 1. many kinds of function sewing, lay down a staight needle or two staight needles, perhaps lay down the pin that stretches tight, all can carry out different sewing works, can roll neck, rolling to what thin property fabric in various interlock fabrics, single jersey, the chemical fibre etc. carried out three pin flat-seams, also can do crosspointer flat-seam, single needle roll neck, three pins, crosspointer press strip seam, crosspointer waist-belt stumble seam, go up the sleeve seam, can obtain two-sided covering, bottom surface covering flat-seam stitching and double chainstitch; 2. volume is little, in light weight, compact conformation is simple, cost is low, low price, is fit to medium-sized and small enterprises and individual services industry.

The utility model is described in further detail below in conjunction with accompanying drawing and example.

Fig. 1 is the utility model body shape assumption diagram;

Fig. 2 is the utility model needle bar mechanism structure chart;

Fig. 3 is the utility model pin mechanism structure figure that stretches tight;

Fig. 4 is the utility model bending needing mechanism structure chart;

Fig. 5 is the utility model presser foot device structure chart;

Fig. 6 is the utility model feed mechanism structure chart;

Fig. 7 is the moving pressure-raising of the utility model foot, thread releasing mechanism structure chart;

Fig. 8 strokes the line mechanism structure chart for the utility model.

In Fig. 1, the right-hand member of platform-type support [6] is equipped with the head [3] perpendicular to last plane, needle plate [8] is contained in the left side, last plane of support [6], shank on the head [3] connects the pin folder, three staight needles are aimed at three on the needle plate [8] and are held pin hole, seam platform [7] also is equipped with on the last plane of support [6], upper encloser [13], seam platform [7] can be gone up seam platform screw by support [6] and turn left as dead axle, lower encioser [4] is equipped with in the front of support [6], rotate forward after can moving right by the hinge on the lower encioser connecting plate, the flywheel that is connected with main shaft [1] is contained in the right side of support [6] and the flywheel case [2] of safe usefulness is housed, food tray [5] is connected with the bottom surface of support [6], the pin case [9] of security protection is equipped with in the left side of head [3], and can axially turn left moving with the pin cover, the back side of head [3] is equipped with and is lifted the rear casing [12] of pressing lever [11] and playing security protection, the preceding right side of face of head [3] is equipped with pressure-raising, the wire pressing device assembly [10] of thread releasing mechanism promptly constitutes the utility model body profile.

In Fig. 2, crank on the main shaft [14] drives shank link assembly [15], shank link assembly [15] two ends are connected with the fastening steel marble of main shaft [14] and wobble crank [16] respectively with ball pivot, the upper end of shank link assembly [15] is equipped with and is only put dog, be used for preventing that steel marble from swinging, under the drive of shank link assembly [15], the go up axle [17] of balance staff crank [16] on head [3] swings; Swing connecting bar [18] is connected respectively by last axle [17] with wobble crank [16], so along with the swing of balance staff crank [16] is also up and down reciprocatingly swung; Swing connecting bar [18] is connected with chain section pin [19] with shank joint [21] by chain section [20], shank [22] is fastened in the shank joint [21] with screw, the shank joint is equipped with the line crossing bracket that take-up is used on [21], pin folder [23] is equipped with in the lower end of shank [22], staight needle [24], like this, drive shank [22] when swing connecting bar [18] is done swing and in the needle bar hole of head [3], do reciprocating motion vertically with respect to the appearance pin hole of the needle plate [8] on the support [6], make the sewing on staight needle [24] the puncture needle plate [8] on the pin folder [23] and penetrate the triangle wire loop that the looper back side on the bending needing mechanism forms, line crossing bracket on the shank joint [21] also pumps thereupon simultaneously, plays the effect of take-up.

In Fig. 3, balance staff crank [16] is made left and right sides reciprocally swinging around the axle [17] of going up of head [3], head [3] is equipped with resting guide [28], chain section joint [29], be connected in the chute of resting guide [28] by sliding axle [31], chain section joint [29] is screwed on sliding axle, swing connecting bar [26] two ends respectively with balance staff crank [16] on screw axis [27], nut [25] is connected with sliding axle [31], and prevent to move axially with collar [30], like this, when balance staff crank [16] is swung, by swing connecting bar [26], sliding axle [31] drives chain section joint [29] and does to move back and forth about level in the chute of resting guide [28]; Chain section joint [29] is connected with chain section pin [35] with an end of chain section [34], chain section crank [36], the other end of chain section crank [36] is fastened on head [3] lower end with screw and stretches tight on the needle shaft [33], and be equipped with and prevent axially movable collar [32], the stretch tight lower end of needle shaft [33] is fixed with the punch block that stretches tight [37], the pin that stretches tight [38], when chain section joint [29] is mobile, level reciprocal arc swing around about staight needle is also made in stretch tight needle shaft [33] swing of drive, the pin [38] that thereupon stretches tight; The pin [38] that stretches tight catches on the pin suture that stretches tight when moving to rightmost, and drive suture to left movement, staight needle during to Far Left [24] begins to descend, and the short staight needle of rightmost [24] passes through in the needlework front of stretching tight, and all the other two pieces of staight needles [24] pass through from the needlework back of stretching tight, after two pieces of long staight needles [24] penetrate the needlework ring that stretches tight, the pin [38] that stretches tight begins to move right, and begins to connect with staight needle [24] suture, the pin that stretches tight [38] when moving to rightmost staight needle [24] also drop to extreme lower position, tighten up stitching, promptly finish a circulation.

In Fig. 4, the bending needing mechanism swing; The left end head of main shaft [14] is equipped with the large needle crank [39] with eccentric pellet shot from a slingshot, the below is equipped with looper and is driven crank [41], large needle connecting rod [40] two ends drive the fastening steel marble of crank [41] with large needle crank [39] and looper respectively with ball pivot and are connected, be equipped with in the middle of the large needle connecting rod [40] and only put dog, be used for preventing that steel marble from swinging, when the eccentric pellet shot from a slingshot of main shaft [14] drive large needle crank [39] rotated, looper drove the looper driving crank axle of crank [41] on support [6] and does up and down reciprocatingly to swing; Looper drives crank [41] and is connected with chain section pin [35] with chain section [34], chain section joint [42], chain section [34], the driving driven crank of looper [43], driving the driven crank of looper [43] is fixed on the curved needle shaft [44], when looper drives crank [41] when up and down reciprocatingly swinging, about becoming in axis hole, curved needle shaft [44] back and forth rotates, looper frame [45] is fastening to be contained on the curved needle shaft [44], looper [46] is housed on the frame, promptly becomes the needle shaft of going for a stroll [44] left and right sides reciprocally swinging with back and forth rotating about curved needle shaft [44];

Bending needing mechanism moves: be fixed with looper cam [47] and live with swing connecting bar [48] on main shaft [14] and be connected, wobble crank [50] is connected with small rod axle [51], wobble crank [50] is hinged with pin [49] with swing connecting bar [48] other end, makes small rod axle [51] do front and back when main shaft [14] rotates and back and forth rotates; Because looper small rod [52] is fixed on the small rod axle [51], so become reciprocally swinging before and after small rod axle [51] is done with the rotation of small rod axle [51]; Be equipped with on the looper small rod [52] can be movable small rod slide block [53] with back and forth promote curved needle shaft [44] before and after chute on the curved needle shaft [44] is connected, to looper [46] the work front and back on the looper frame [45] that is packed on the curved needle shaft [44] are moved back and forth; The left and right sides reciprocally swinging of looper [46] and front and back move back and forth to intersect simultaneously carries out, when staight needle [24] from the extreme lower position bottom out, looper [46] also begins from farthest right position to left movement, when staight needle [24] rises to certain altitude, the staight needle line forms wire loop under sewing, looper [46] continues to left movement and penetrates three wire loops on three staight needles [24] successively, when staight needle [24] length arrives the extreme higher position, by the feeding tooth [72] on the feed mechanism, begin sewing is moved forward, the wire loop of the whole staight needles [24] that caught on by looper [46] is elongated, and tightened up previous stitching, at this moment looper [46] Far Left simultaneously forward (to operator's direction) move a certain distance, sewing transferred a distance between needle point tracers from, staight needle [24] descends and to puncture sewing once more and to penetrate the triangle wire loop at looper [46] back side, staight needle [24] continues to descend, looper [46] moves right, looper thread is blocked the formation looper thread by staight needle [24] and the staight needle line wears connection mutually, staight needle [24] moves to extreme lower position, looper [46] also moves to rightmost, move a certain distance backward simultaneously, finish a circulation.

In Fig. 5, presser bar [56] perpendicular to needle plate [8] is housed in the strut kong of head [3], and with depression bar spring [57], pressure regulating screw [58] is connected on the strut kong upper end, pressure regulating screw [58] is connected with the depression bar screw of head [3], can regulate with respect to the sewing pressure size on needle plate [8] or the needle plate being fastened at the presser foot component alive [54] of presser bar [56] lower end, the presser feet spanner [60] of presser bar [56] upper end connects with presser feet spanner screw [61], can to press a piece [59] be fulcrum by being installed in lifting on the head [3], when swinging presser bar [56] and the presser foot component [54] of living are lifted or descend at presser feet spanner [60], for prevent that presser foot component alive [54] from swinging in sewing, on presser bar [56], be fixed with the presser bar spring bracket [55] of trough of belt mouth, notch is connected with the needle shaft that stretches tight [33], presser foot component [54] rises when living, during decline, presser bar spring bracket [55] is that guiding moves with the needle shaft that stretches tight [33] up and down with presser bar [56].

In Fig. 6, feeding cam [62] is housed on the main shaft [14], tooth lifting cam [71], feeding cam [62] acts on feeding connecting rod [63], with needle gage adjustment screw [65] feeding connecting rod [63] being regulated in crank [64] the circular arc notch at needle gage again connects, needle gage is regulated crank [64] and is packed on the sleeve pipe of crank of tooth frame [67] with screw, crank of tooth frame [67] can carry out the front and back reciprocally swinging around crank of tooth frame axle [66], and by retainer [69], pin [68] is connected with feeding tooth [72], therefore, when feeding cam [62] rotated with main shaft [14], feeding tooth [72] produced and moves forward and backward; Tooth lifting cam [71] on the main shaft [14] is set with lifts tooth connecting rod [70], there is the minor axis activity upper end of lifting tooth connecting rod [70], be matched with in retainer [69] the front end axis hole, when tooth lifting cam [71] rotates with main shaft [14], lift tooth connecting rod [70] drive retainer [69] and move up and down; Like this, the elliptical path of synthesizing is moved and is finished gap sewing conveying before and after feeding tooth [72] just can carry out in the alveolus of needle plate [8], up and down, regulate seam mark density size, can unclamp needle gage adjusting spiral shell pin [65] moves up and down in the circular arc notch of needle gage adjusting crank [64] together with feeding connecting rod [63], thereby changed moment, and crank of tooth frame [67] swing traverse is changed, needle gage adjustment screw [65] position more down, it is that feeding tooth [72] is mobile just little that crank of tooth frame [67] swing is healed little, otherwise then opposite.

In Fig. 7, wire pressing device support plate [73] and three wire pressing device assemblies [10] are equipped with in the front of head [3], the thread tension releasing disc [74] of band three-jaw and gathering sill is contained on the support plate [73] with the activity of spiral shell pin, the lower end of thread tension releasing disc [74] is connected tension with spring [76] with head [3], loose ends lever [75] is equipped with on head [3] right side, and be connected with notch on the thread tension releasing disc [74], head [3] back side is equipped with to lift and is pressed lever [11], by screw [77] is the fulcrum carry-over moment, lift and press lever [11] right-hand member hole to be connected with the melon seeds chain on the frame foot pedal, lift after stressed and press lever [11] left end to touch presser feet spanner screw [61] presser bar [56] and work presser foot component [54] are lifted, right-hand member shake-up loose ends lever [75] makes thread tension releasing disc [74] move up by guide groove simultaneously, even the three-jaw on the thread tension releasing disc [74] is pushed the tension disc in three wire pressing device assemblies [10], i.e. loose ends simultaneously aside.

In Fig. 8, on support [6], what the left end of main shaft [14] and large needle crank [39] were assembled with the trough of belt mouth strokes line cam [79], line crossing bracket assembly [78] is equipped with near the place of stroking line cam [79] in left side at support [6], during installation, the wire-blocking board on the line crossing bracket assembly [78] is crossed the line plate and to stroke line cam [79] notch and both sides staggered and leave the gap, when main shaft [14] rotates, stroke line cam [79] thereupon and rotate relative to line crossing bracket assembly [78] is staggered; Looper thread is by crossing coil and crossing the cable-through hole of line plate both sides on the coil holder assembly [78], and in the notch that strokes line cam [79] by the wire-blocking board on the line crossing bracket assembly [78], penetrate the through wires hole of the looper [46] on the bending needing mechanism at last; When stroking line cam [79] rotation, can stroke line by the eccentric size of cam, when looper [46] is moved into [24] three wire loops of staight needle left, stroking the more than half off-centre of line cam [79] is loose looper thread backward, when looper [46] when Far Left begins to move right, stroke the more than half off-centre of line cam [79] and promptly tighten up looper thread forward.

Claims (1)

1. pin flat seaming machine, it is characterized in that: it is made of following mechanism:

The body profile: constitute key main body by support [6] and head [3], flywheel [1] is installed in the right-hand member head of main shaft [14], and flywheel case [2], lower encioser [4], food tray [5], seam platform [7], needle plate [8], upper encloser [13] are installed in respectively on the support [6]; Pin case [9], wire pressing device assembly [10], lift and press lever [11], rear casing [12] to be installed in respectively on the head [3];

Needle bar mechanism: it is by shank link assembly [15], wobble crank [16], last axle [17], swing connecting bar [18], chain section pin [19], chain section [20], shank joint [21], shank [23], pin folder [23], staight needle [24] is in series, shank link assembly [15] two ends are connected with steel marble ball pivot on the wobble crank [16] with main shaft [14] respectively, last axle [17] is contained in the upper shaft hole on the head [3], swing connecting bar [18] and wobble crank [16] are fastened on respectively on the two ends of axle [17], shank [22] is contained in the needle bar hole of head [3] left end, and affixed with shank joint [21];

The pin mechanism of stretching tight: it is by swing connecting bar [26], sliding axle [31], chain section joint [29], chain section [34], chain section pin [35], chain section crank [36], needle shaft [33] stretches tight, punch block [37] stretches tight, the pin [38] that stretches tight is in series, resting guide [28] is fastened on head [3] left side, the back side, sliding axle [31] one ends are contained in the chute of resting guide [28], can horizontally slip along chute, affixed chain section joint [29] and socket swing connecting bar [26] on the axostylus axostyle, the other end spins and prevents axially movable collar [30], and swing connecting bar [26] is connected on the wobble crank [16] by screw axis [27] and nut [25];

Bending needing mechanism: it is made up of looper swing mechanism and looper travel mechanism two parts;

The looper swing mechanism: it is installed between main shaft [14] left end head and the curved needle shaft [44], by big needle bar crank [39], large needle link assembly [40], looper drives crank [41], chain section [34], chain section joint [42], chain section [34], the driven crank of looper [43], curved needle shaft [44], looper frame [45], looper [46] is in series, large needle link assembly [40] two ends are connected with the steel marble ball pivot that looper drives on the crank [41] with large needle crank [39] respectively, chain section [34] drives crank [41] with looper, chain section joint [42], connect with chain section pin [35] between the driven crank of looper [43], looper drives crank [41] and is installed on the looper driving crank axle that is fixed on the support [6], can swing up and down;

Looper travel mechanism: it is made up of looper cam [47], swing connecting bar [48], pin [49], wobble crank [60], small rod [51], looper small rod [52], small rod slide block [53], curved needle shaft [44], looper frame [45], looper [46], looper cam [47] one ends are contained on the main shaft [14], one end is connected with wobble crank [50] by pin [49], wobble crank [50] other end is contained on the small rod axle [51], looper small rod [52] two ends are fixed in respectively on small rod axle [51] and the small rod slide block [53], and small rod slide block [53] is contained in curved needle shaft] 44] on;

Presser foot device: it by live presser foot component [54], presser bar spring bracket [55], presser bar [56], depression bar spring [57], pressure regulating screw [58], lift and press a piece [59], wrench [60], spanner screw [61] to constitute, presser bar [56] is installed in the presser bar hole of head [3] left end, presser feet spring [57], pressure regulating screw [58] are sleeved on presser bar [56] upper end, pressure regulating screw [58] and the depression bar screw on head [3] spin, presser bar spring bracket [55] is fastened on presser bar [56] lower end, and be connected in the needle shaft that stretches tight [33], lift and press a piece [59] to be installed on the head [3];

Feed mechanism: it is made up of traverse mechanism before and after the feeding tooth and feeding tooth up-down mechanism two parts;

Traverse mechanism before and after the feeding tooth: it is by feeding cam [62], feeding connecting rod [63], needle gage is regulated crank [64], needle gage adjustment screw [65], crank of tooth frame axle [66], crank of tooth frame [67], pin [68], retainer [69], feeding tooth [72] constitutes, feeding cam [62] is installed on the main shaft [14], feeding connecting rod [63] is installed in needle gage with needle gage adjustment screw [65] and regulates in the arc groove of crank [64], needle gage is regulated crank [64] and is packed on the sleeve pipe of crank of tooth frame [67], crank of tooth frame [67] is contained on the crank of tooth frame axle [66], feeding tooth [72] is fixed on the retainer [69], and is connected with crank of tooth frame [67] by pin [68];

Up-down mechanism: it by tooth lifting cam [71], lift tooth connecting rod [70], retainer [69], feeding tooth [72] and constitute, tooth lifting cam [71] is contained on the main shaft [14], and suit lifts tooth connecting rod [70], lifts tooth connecting rod [70] upper end minor axis and matches with retainer [69] front end axis hole;

The moving pressure-raising of foot, thread releasing mechanism: it presses lever [11] by lifting, screw [77], promote screw [61], wire pressing device support plate [73], wire pressing device assembly [10], thread tension releasing disc [74], spring [76], the loose ends lever constitutes, wire pressing device support plate [73] and installation wire pressing device assembly [10] onboard, thread tension releasing disc [74] is contained in head [3] right-hand member, tension is connected with head [3] with thread tension releasing disc [74] lower end respectively at spring [76] two ends, lift and press lever [11] to be installed in head [3] back side, with screw [77] is fulcrum, head [3] right side is equipped with loose ends lever [75], and the interlocking of the notch on thread tension releasing disc [74];

Stroke line mechanism: it by stroke line cam [79], line crossing bracket [78] is formed, stroking line cam [79] is sleeved on the large needle crank [39], line crossing bracket assembly [78] is installed near on the support that strokes line cam [79] [6] left side, wire-blocking board on the line crossing bracket assembly [78], cross the line plate and stroke line cam [79] notch and two hand hay cutters are staggered, and leave the gap.

Images