CN217499647U - Flat seaming machine - Google Patents

Abstract

The utility model relates to a flat seaming machine contains: a sewing body, a plurality of machine needles, a curved needle, a fixed cutter and a movable cutter, wherein the sewing body is provided with a needle plate with a plurality of needle holes and a lower shaft capable of rotating, the needles can drive a plurality of needles to penetrate into one of the needle holes one by one, in addition, the curved needle can swing through the lower shaft, so that the curved needle is matched with a plurality of machine needles to generate thread hooking motion, the bottom thread can be interlaced with a plurality of needle threads, the movable cutter is provided with a bottom line cutting edge and a plurality of needle line cutting edges and can move back and forth between a line hooking position and a cutting position relative to the fixed cutter, wherein, when the movable cutter is at the thread hooking position, the cutting edge of the bottom thread can hook the bottom thread and each cutting edge of the needle thread can hook a needle thread individually, when the movable cutter moves to the cutting position, the bottom line can be cut off by the bottom line cutting edge and each needle line cutting edge can cut off one needle line individually, so that the load of the movable cutter for cutting off the needle lines can be reduced.

Description

Flat seaming machine

Technical Field

The utility model relates to a flat seaming machine capable of producing chain type sewing stitch, in particular to a flat seaming machine capable of ensuring to cut off all needle threads and bottom threads after finishing sewing operation.

Background

The sewing machine mainly combines a plurality of layers of sewing materials through sewing, and as the technology continuously evolves, the sewing machine on the market has a plurality of styles at present, while the sewing machine with different styles can be applied to the sewing operation of different sewing materials, wherein, the flat seaming machine which can selectively carry out sewing modes such as collar rolling, edge folding, flat seaming, splicing seam or edge decoration and the like on the clothes is available on the market at present.

Referring to fig. 1 and 2, a conventional pillar-type flat seaming machine 1 for sewing clothes or uppers, the conventional pillar-type flat seaming machine 1 includes a sewing body 10, a needle bar mechanism 11, a looper mechanism 12 and a thread cutting mechanism 13, as shown in the figure, the sewing body 10 includes three parts, a head 101, a pillar 102 and a base 103, the head 101 has an upper shaft 104 capable of rotating therein, the base 103 has a lower shaft 105 parallel to the upper shaft 104 therein, the lower shaft 105 is driven by the upper shaft 104 to rotate therein, wherein the base 103 forms a pillar-shaped seat 106 spaced from the pillar 102 toward the head 101, a needle plate 107 located below the needle bar mechanism 11 is installed at the highest position of the pillar-shaped seat 106, and the needle plate 107 has a plurality of needle holes 107 a.

The needle bar mechanism 11 has a plurality of needles 111, each needle 111 is located in one of the needle holes 107a of the needle plate 107 in a pair, and the needle bar mechanism 11 is connected to the upper shaft 104 of the sewing body 10, so that the upper shaft 104 can drive the needle 111 to pass through the needle hole 107a when rotating, the looper mechanism 12 is located inside the cylindrical seat 106 of the sewing body 10, and the looper mechanism 12 has a looper 121, wherein the looper mechanism 12 is connected to the lower shaft 105 of the sewing body 10, so that when the lower shaft 105 rotates through the upper shaft 104, the lower shaft 105 can drive the looper 121 to swing, and the looper 121 can cooperate with the plurality of needles 111 to generate thread hooking motion, so that a bottom thread 14 (shown in fig. 3A) penetrating through the looper 121 can be interlaced with a plurality of needle threads 15 (shown in fig. 3A) penetrating through the needle 111.

The thread cutting mechanism 13 has a fixed cutter 131, a movable cutter 132 and a thread clamping spring 133, the fixed cutter 131 is connected to the needle plate 107 of the cylindrical holder 106, the movable cutter 132 has a bottom thread edge 132a and a thread edge 132b arranged on one side of the bottom thread edge 132a, and the movable cutter 132 can swing back and forth relative to the fixed cutter 131, wherein the thread clamping spring 133 is used for allowing the bottom thread edge 132a or the thread edge 132b to contact the fixed cutter 131.

Referring to fig. 3A and 3B, after the conventional pillar-type flat seaming machine 1 finishes a sewing operation on a dress or a shoe upper, the movable cutter 132 of the thread cutting mechanism 13 moves to a thread hooking position a1, such that the bottom thread cutting edge 132a of the movable cutter 132 is ready to hook the bottom thread 14, and the needle thread cutting edge 132B of the movable cutter 132 is ready to hook the plurality of needles 15, and then the movable cutter 132 swings from the thread hooking position a1 to a cutting position a2, such that the needle thread cutting edge 132B cooperates with the fixed cutter 131 to cut off the plurality of needles 15, and then the bottom thread cutting edge 132a cooperates with the fixed cutter 131 to cut off the bottom thread 14, and after the bottom thread 14 is cut off by the bottom thread cutting edge 132a and the fixed cutter 131, the thread ends of the needles 15 are in an undamped state, and the thread ends of the bottom thread 14 are clamped by both the movable cutter 132 and the thread clamping piece 133.

However, when the existing pillar-type flat seaming machine 1 sews clothes or thin materials, a thinner bobbin thread 14 and a thinner needle thread 15 are used, so that the single needle thread cutting edge 132b of the movable cutter 132 can cut off all the thinner needle threads 15 at one time in cooperation with the fixed cutter 131, however, when the conventional pillar-type flat seaming machine 1 sews the shoe upper or thick materials, the conventional pillar-type flat seaming machine 1 uses the thick ground thread 14 and the thick needle thread 15, so that a large resistance is generated when the single needle thread cutting edge 132b of the movable cutter 132 cooperates with the fixed cutter 131 to cut the thick needle thread 15, furthermore, the needle thread cutting edge 132b and the fixed cutter 131 are difficult to cut off all thick needle threads 15 together at one time, so that the thicknesses of the bobbin thread 14 and the needle thread 15 used in the conventional cylindrical flat seaming machine 1 are often limited, or the conventional cylindrical flat seaming machine 1 cannot be matched with an automatic thread cutting function.

SUMMERY OF THE UTILITY MODEL

The main objective of the utility model is to provide a flat seaming machine, its thread cutting mechanism's structure appearance for the flat seaming machine no matter uses thinner base thread and needle thread to come the sewing in dress or thin type material, still uses thicker base thread and needle thread to come the sewing in vamp or thick type material, and the thread cutting mechanism of flat seaming machine can both cut off many needle threads once only, and then improves the practicality of flat seaming machine.

In order to achieve the above object, the utility model provides a flat seaming machine, which comprises,

the sewing machine comprises a sewing body, a needle plate and a sewing head, wherein the sewing body is provided with a lower shaft capable of rotating and the needle plate positioned on one side of the lower shaft;

the needles can approach or depart from the needle plate, so that the needles can drive the needle lines to penetrate through the needle holes;

the curved needle is driven by the lower shaft to swing, so that the curved needle is matched with the needles to generate thread hooking motion, and a bottom thread penetrating through the curved needle can be interwoven with the plurality of needle threads; and

the thread cutting mechanism is provided with a fixed cutter fixed on the sewing body, a movable cutter capable of moving relative to the fixed cutter and a thread cutting driving component connected to the movable cutter, and the thread cutting driving component can drive the movable cutter to move from a thread hooking position for hooking the needle thread and the bottom thread to a cutting position close to the fixed cutter, so that the movable cutter can cut the needle thread and the bottom thread in cooperation with the fixed cutter;

the method is characterized in that: the movable cutter is provided with a bottom line cutting edge and a plurality of needle line cutting edges, the bottom line cutting edge can hook the bottom line, and each needle line cutting edge can hook one needle line in a one-to-one mode.

The flat seaming machine, wherein: when the movable cutter is positioned at the thread hooking position, all the needle and thread cutting edges are positioned at one side of the needle hole, and meanwhile, the fixed cutter is positioned at the other side of the needle hole.

The flat seaming machine, wherein: the thread cutting mechanism is characterized in that the thread cutting mechanism is further provided with a thread clamping elastic sheet, the thread clamping elastic sheet is provided with a connecting part connected to the needle plate and a thread clamping part close to the fixed cutter, a guide part is arranged between the connecting part and the thread clamping part, the guide part is used for enabling the movable cutter to penetrate between the thread clamping part and the fixed cutter in the process of moving to the thread hooking position, and the thread clamping part can be in contact with the movable cutter to generate a thread clamping acting force acting on the movable cutter.

The wire clamping elastic sheet is further provided with an extending part which is arranged at intervals on the connecting part, one end of the extending part extends to form a deformable deformation part to be connected to the connecting part, the other end of the extending part forms an abutting part which is arranged at intervals on the wire clamping part, the wire cutting mechanism is further provided with an adjusting piece, the adjusting piece is locked on the connecting part through the extending part to change the interval distance between the connecting part and the extending part, so that the deformation part can generate deformation degrees of different degrees, and the abutting part can be in contact with the wire clamping part through the deformation parts of different deformation degrees to adjust the wire clamping acting force.

The utility model discloses a characteristics lie in that thread cutting mechanism's movable cutter is except being equipped with a bottom line blade, movable cutter still is equipped with a plurality of needle thread blades, make movable cutter remove when colluding the line position, the bottom line blade can catch on the bottom line, and each needle thread blade can catch on one to one in one needle thread, and then when movable cutter moves to cutting off the position from colluding the line position, the fixed cutter of bottom line blade cooperation can cut off the bottom line, and the fixed cutter of each needle thread blade cooperation can cut off a needle thread individually, therefore, the sewing machine no matter uses thinner bottom line and needle thread to come the sewing in the dress, still use thicker bottom line and needle thread to come the sewing in the vamp, thread cutting mechanism's movable cutter can both once only cut off many needle threads, and then improve the practicality of sewing machine.

Drawings

FIG. 1 is a side view of a prior art pillar-type flat seaming machine;

FIG. 2 is an exploded view of the needle, needle plate and looper;

FIG. 3A is a schematic view of a movable cutter of a conventional pillar type flat seaming machine at a thread hooking position;

FIG. 3B is a schematic diagram of a movable cutter of a conventional cylindrical flat seaming machine in a cutting position;

FIG. 4 is a perspective view of the flat seaming machine of the present invention;

FIG. 5 is a schematic view of the feeding mechanism, the needle bending mechanism and the thread cutting mechanism assembled to the cylindrical base;

FIG. 6 is an exploded view of the feeding mechanism, the looper mechanism and the thread cutting mechanism;

FIG. 7 is an exploded view of the feed mechanism;

FIG. 8 is an exploded view of the looper mechanism;

FIG. 9A is a perspective view of the thread cutting mechanism;

fig. 9B is an exploded view of the thread cutting mechanism relative to the needle plate;

FIGS. 10A and 10B are schematic views of the abutting portion contacting the clamping portion;

FIG. 11A is a schematic view of the flat seaming machine of the present invention completing a sewing operation;

FIG. 11B is a schematic view of the movable cutter moving to the thread hooking position;

fig. 11C is a schematic view of the movable cutter moving to the cutting position.

Description of reference numerals: 1-existing column type flat seaming machines; 10-sewing the body; 101-vehicle head; 102-a pillar; 103-a base; 104-an upper shaft; 105-a lower shaft; 106-column type seat; 107-needle plate; 107 a-pinhole; 11-a needle bar mechanism; 111-machine needles; 12-a needle bending mechanism; 121-bending needle; 13-a thread cutting mechanism; 131-fixing the cutter; 132-a movable cutter; 132 a-a bobbin thread cutting edge; 132 b-needle and thread edges; 133-a wire clip spring; 14-bottom line; 15-needle thread; a 1-hook position; a 2-cut position; 2-flat seaming machine; 20-sewing the body; 21-vehicle head; 22-a pillar; 23-a base; 231-a work table; 24-an upper shaft; 25-lower shaft; 26-a cylindrical seat; 261-bent-pin shaft support; 262-needle plate; 262 a-a pinhole; 262 b-feed through hole; 30-a needle bar mechanism; 31-needle bar; 32-machine needle; 40-a feeding mechanism; 41-feeding teeth; 42-a feed linkage; 421-slot hole; 43-a feed drive assembly; 44-a latch; 45-a slide block; 50-a needle bending mechanism; 51-a curved needle drive assembly; 511-eccentric wheel; 512-a bearing; 52-curved needle linkage; 53-curved needle seat; 531-bending the needle; 60-a thread cutting mechanism; 61-fixing the cutter; 611-fixed blade; 62-a movable cutter; 621-bottom line edge; 622-needle and line cutting edge; 63-a tangent drive assembly; 631-tangential turning bar; 632-tangent drive source; 64-a wire clip spring; 641-a connecting portion; 642-an extension; 643-a guide; 644-a wire clamping part; 645-deformation; 646-an abutment; 65-an adjustment member; 651-head; 652-threaded engagement; 70-needle thread; 80-bottom line; b1-hook position; b2-cut off position; f-wire clamping force.

Detailed Description

The invention will be further described with reference to specific embodiments and drawings, the advantages and features of which will become more apparent as the description proceeds.

In the drawings, two sides of the X-axis refer to left and right sides of the flat seaming machine facing the operator, two sides of the Y-axis refer to front and rear sides of the flat seaming machine facing the operator, and two sides of the Z-axis refer to upper and lower sides of the flat seaming machine facing the operator.

Referring to fig. 4, 5 and 6, the flat seaming machine 2 of the present invention mainly comprises a sewing body 20, a needle bar mechanism 30, a feeding mechanism 40, a looper mechanism 50 and a thread cutting mechanism 60, wherein the sewing body 20 mainly comprises three parts, i.e. a head 21, a pillar 22 and a base 23, the head 21 has an upper shaft 24 capable of rotating around an X-axis, the base 23 has a lower shaft 25 parallel to the X-axis, the lower shaft 25 can rotate synchronously through the upper shaft 24, wherein the base 23 has a working table 231 facing the head 21, and the base 23 forms a column seat 26 below the head 21 along a Z-axis from the working table 231, as shown in the figure, the column seat 26 has a looper shaft pillar 261 with a hollow inside and a group of needle plates 262 mounted on the top of the looper shaft 261, the needle plate 262 is provided with a plurality of needle holes 262a (shown in fig. 9B) and a feed-through hole 262B (shown in fig. 9B).

The needle bar mechanism 30 has a needle bar 31 substantially parallel to the Z axis, the needle bar 31 is assembled on the upper shaft 24 of the sewing body 20, and the lowest part of the needle bar 31 is provided with needles 32 corresponding to the number of needle holes 262a, wherein the upper shaft 24 rotates to drive the needle bar 31 to reciprocate longitudinally along the Z axis, so that each needle 32 can pass through one needle hole 262a by the needle bar 31 moving along the Z axis, thereby a plurality of needles 32 can approach or separate from the column-shaped seat 26 of the sewing body 20 by the rotation of the upper shaft 24, each needle 32 individually passes through a needle thread 70 (as shown in fig. 11A), so that when the needle 32 moves downwards to pass through the needle hole 262a, the needle thread 70 is brought into the needle hole 262a by the moving needle 32, and a part of the needle thread 70 is located inside the looper shaft support 261 of the column-shaped seat 26.

Referring to fig. 6 and 7, the feeding mechanism 40 is mainly located in the column-shaped seat 26 of the sewing body 20, and the feeding mechanism 40 has a feeding tooth 41, a feeding linkage rod 42 and a feeding driving component 43, the feeding tooth 41 is aligned with the feeding through hole 262b of the needle plate 262, and the feeding tooth 41 is movably assembled with the feeding linkage rod 42, in this embodiment, the feeding tooth 41 and the feeding linkage rod 42 are connected with each other by the assembly of the sliding slot and the sliding track, so that the feeding tooth 41 can selectively adjust the height difference relative to the feeding linkage rod 42, and further the relative position between the feeding tooth 41 and the needle plate 262 can be changed, in addition, the feeding linkage rod 42 is located between the feeding tooth 41 and the feeding driving component 43, and a slot hole is formed through a local area of the feeding linkage rod 42, and the feeding linkage rod 42 is pivotally connected to the bending needle shaft of the column-shaped seat 26 at the slot 421 position through a pin 44 and a sliding block 45 penetrating through the slot 421 The column 261, in addition, the feeding driving component 43 is connected between the lower shaft 25 of the sewing body and the feeding linkage rod 42, and the feeding driving component 43 can change the rotation motion of the lower shaft 25 into the reciprocating motion of the feeding teeth 41 which can simultaneously move back and forth and up and down, so that the feeding teeth 41 can simultaneously move back and forth and up and down in the feeding through hole 262b of the needle plate 262, and the feeding teeth 41 can generate an approximately elliptical motion track.

Referring to fig. 6 and 8, the looper mechanism 50 is mainly composed of a looper driving assembly 51, a looper linkage 52 and a looper base 53, the looper driving assembly 51 has two parts of an eccentric wheel 511 and a bearing 512, the eccentric wheel 511 is connected to the lower shaft 25 of the sewing body 20, the bearing 512 is sleeved on the periphery of the eccentric wheel 511, in addition, one end of the looper linkage 52 is sleeved on the periphery of the bearing 512, the other end of the looper linkage 52 is pivoted on the looper base 53, wherein the looper base 53 is installed with a looper 531 close to the needle plate 262, thereby, when the lower shaft 25 of the sewing body 20 rotates, the axis of the bearing 512 rotates around the lower shaft 25 through the eccentric wheel 511, so that the looper linkage 52 can make reciprocating swing through the bearing 512, and the looper linkage 52 making reciprocating swing can drive the looper 53 to swing, so that the looper 531 can make a plurality of needles 32 of the needle bar mechanism 30 generate thread hooking motion, so that a bobbin thread 80 (shown in fig. 11B) attached to the looper 531 can be interlaced with the plurality of needle threads 70.

Referring to fig. 9A and 9B, the thread cutting mechanism 60 is installed on the cylindrical base 26 of the sewing body 20, and the thread cutting mechanism 60 has a fixed cutter 61, a movable cutter 62, a thread cutting driving assembly 63, a thread clamping spring 64 and an adjusting member 65, wherein the fixed cutter 61 is connected to the needle plate 262 of the cylindrical base 26, and one side of the fixed cutter 61 is provided with a fixed blade 611 close to the needle hole 262a of the needle plate 262, the movable cutter 62 is located inside the looper shaft support 261 of the cylindrical base 26, and the movable cutter 62 is provided with a bottom thread cutting edge 621 and a plurality of thread cutting edges 622 arranged at different positions, wherein the movable cutter 62 is located under the fixed blade 611 such that the height position of the movable cutter 62 is lower than that of the fixed cutter 61, the thread cutting driving assembly 63 has a thread cutting rotating rod 631 located inside the cylindrical base 26 and a thread cutting driving source 632 located inside the base 23, the one end of tangent line dwang 631 is connected in activity cutter 62, and the other end of tangent line dwang 631 is connected in tangent line driver source 632, and tangent line driver source 632 can drive tangent line dwang 631 and swing for carry out wobbling tangent line dwang 631 and can drive activity cutter 62 selectivity and be close to or keep away from in fixed cutter 61.

The thread clamping elastic sheet 64 of the thread cutting mechanism 60 has a connection part 641 and an extension part 642 arranged at an interval on the connection part 641, the connection part 641 is connected to the needle plate 262 of the pillar-shaped seat 26, wherein one end of the connection part 641 sequentially forms a guide part 643 presenting an inclined pattern and a thread clamping part 644 extending from the guide part 643, and the thread clamping part 644 is close to the fixed cutting knife 61 of the thread cutting mechanism 60, in this embodiment, because the guide part 643 presents an inclined pattern, the guide part 643 can generate a height difference between the connection part 641 and the thread clamping part 644, and the guide part 643 is used to allow the moving movable cutting knife 62 to penetrate between the thread clamping part 644 and the fixed cutting knife 61, so that the thread clamping part 644 can contact the movable cutting knife 62 to generate a thread clamping force F (as shown in fig. 10A) acting on the movable cutting knife 62, so that the bottom line cutting edge of the movable cutting knife 62 or one of the needle lines 622 can contact the fixed cutting edge 611 of the fixed cutting knife 61, as shown in the figure, the connecting portion 641 extends to form a deformable deformation portion 645 at an end away from the guiding portion 643 to connect to the extending portion 642, and the extending portion 642 extends to form an abutting portion 646 arranged at an interval at the yarn clamping portion 644 at an end away from the deformation portion 645.

The adjusting member 65 of the thread cutting mechanism 60 has a head portion 651 and a thread engaging portion 652 extending from the head portion 651, the thread engaging portion 652 sequentially penetrates through the extending portion 642 of the thread clamping elastic sheet 64 and the connecting portion 641 of the thread clamping elastic sheet 64 to be engaged with the pin plate 262 of the column base 26 by threads, in this embodiment, because the thread engaging portion 652 is engaged with the pin plate 262 by threads, when the thread engaging portion 652 rotates relative to the pin plate 262, the head portion 651 can linearly move to be close to the extending portion 642, and further the head portion 651 can be pressed against the extending portion 642, so that the extending portion 642 can be displaced relative to the connecting portion 641 of the thread clamping elastic sheet 64, so that the deformation portion 645 of the thread clamping elastic sheet 64 can be deformed by the displaced extending portion 642, as shown in fig. 10A, in a preferred embodiment, the thread engaging portion 652 rotates clockwise relative to the pin plate 262, so that the head portion 651 moves to push the extending portion 642, the extension portion 642 is close to the connection portion 641 to reduce the distance between the connection portion 641 and the extension portion 642, and the deformation portion 645 is deformed to present a first deformation degree, and meanwhile, the abutting portion 646 of the clip wire spring 64 can contact the clip wire portion 644 through the deformation portion 645 presenting the first deformation degree, so as to greatly increase the magnitude of the clip wire acting force F, as shown in fig. 10B, the thread engaging portion 652 rotates counterclockwise relative to the pin plate 262, so that the head 651 displaces in the direction away from the extension portion 642 to increase the distance between the connection portion 641 and the extension portion 642, and the deformation portion 645 deforms from the first deformation degree to a second deformation degree different from the first deformation degree, and meanwhile, the abutting portion 646 of the clip wire spring 64 can still contact the clip wire portion 644 through the deformation portion 645 presenting the second deformation degree, and can slightly reduce the magnitude of the clip wire acting force F, therefore, the adjusting member 65 rotates relative to the needle plate 262 to change the distance between the connecting portion 641 and the extending portion 642, so that the deformation portion 645 can generate different degrees of deformation to adjust the clamping force F.

Referring to fig. 11A to 11C, in order to cut the bottom thread 80 and the plurality of needle threads 70 by the movable cutter 62 of the thread cutting mechanism 60, first, as shown in fig. 11A, when the flat seaming machine 2 completes the sewing operation of the clothes or the shoe upper, the plurality of needles 32 of the needle bar mechanism 30 stay above the needle plate 262 of the sewing body 20, and meanwhile, the looper 531 of the looper mechanism 50 stays below the needle plate 262, so that the looper 531 is close to the needle hole 262a of the needle plate 262.

Referring to fig. 11B, next, the tangent driving source 632 of the tangent driving assembly 63 drives the tangent rotating rod 631 of the tangent driving assembly 63 to rotate counterclockwise, so that the movable knife 62 of the tangent mechanism 60 can move to contact with the guiding portion 643 of the thread clamping elastic sheet 64, and further the movable knife 62 can penetrate between the fixed knife 61 of the tangent mechanism 60 and the thread clamping portion 644 of the thread clamping elastic sheet 64 through the guiding portion 643, so that the bottom line cutting edge 621 of the movable knife 62 and each needle line cutting edge 622 of the movable knife 62 can pass through all needle holes 262a of the needle plate 262, so that each needle line cutting edge 622 can be ready to hook one needle line 70 individually, meanwhile, the bottom line cutting edge 621 of the movable knife 62 can be ready to hook the bottom line 80, and when the tangent driving source 632 reaches the limit position, the movable knife 62 stays at a thread hooking position B1, each needle line cutting edge of the movable knife 62 can be located at the left side of each corresponding needle hole 262a as shown in the figure, meanwhile, the fixed cutter 61 is located at the right side of all the needle holes 262a as shown in the figure, and then as shown in fig. 11C, the cutting line driving source 632 drives the cutting line rotating rod 631 to rotate clockwise, so that the movable cutter 62 moves from the thread hooking position B1 to a cutting position B2, and the plurality of needle thread cutting edges 622 and the bottom thread cutting edges 621 can sequentially pass through the fixed cutter 61, so that the plurality of needle thread cutting edges 622 cooperate with the fixed cutting edge 611 of the fixed cutter 61 to cut off the plurality of needle threads 70 first, and then the bottom thread cutting edges 621 cooperate with the fixed cutting edge 611 to cut off the bottom thread 80, after the fixed cutter 61 cooperates with the movable cutter 62 to cut off the plurality of bottom threads 70 and the bottom thread 80, the thread end of the needle thread 70 is in an unclamped state, and the thread end of the bottom thread 80 is located between the movable cutter 132 and the thread clamping portion 644 of the thread clamping elastic sheet 64 to be clamped together by the movable cutter 132 and the thread clamping portion 644.

The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (4)

1. A flat seaming machine comprises a flat seaming machine body,

the sewing machine comprises a sewing body, a needle plate and a sewing head, wherein the sewing body is provided with a lower shaft capable of rotating and the needle plate positioned on one side of the lower shaft;

the needles can approach or depart from the needle plate, so that the needles can drive the needle lines to penetrate through the needle holes;

the curved needle is driven by the lower shaft to swing, so that the curved needle is matched with the needles to generate thread hooking motion, and a bottom thread penetrating the curved needle can be interwoven with the plurality of needle threads; and

the thread cutting mechanism is provided with a fixed cutter fixed on the sewing body, a movable cutter capable of moving relative to the fixed cutter and a thread cutting driving component connected to the movable cutter, and the thread cutting driving component can drive the movable cutter to move from a thread hooking position for hooking the needle thread and the bottom thread to a cutting position close to the fixed cutter, so that the movable cutter can cut the needle thread and the bottom thread in cooperation with the fixed cutter;

the method is characterized in that: the movable cutter is provided with a bottom line cutting edge and a plurality of needle line cutting edges, the bottom line cutting edge can hook the bottom line, and each needle line cutting edge can hook one needle line in a one-to-one mode.

2. The flat seaming machine of claim 1, wherein: when the movable cutter is positioned at the thread hooking position, all the needle and thread cutting edges are positioned at one side of the needle hole, and meanwhile, the fixed cutter is positioned at the other side of the needle hole.

3. The flat seaming machine of claim 1, wherein: the thread cutting mechanism is characterized in that the thread cutting mechanism is further provided with a thread clamping elastic sheet, the thread clamping elastic sheet is provided with a connecting part connected to the needle plate and a thread clamping part close to the fixed cutter, a guide part is arranged between the connecting part and the thread clamping part, the guide part is used for enabling the movable cutter to penetrate between the thread clamping part and the fixed cutter in the process of moving to the thread hooking position, and the thread clamping part can be in contact with the movable cutter to generate a thread clamping acting force acting on the movable cutter.

4. A flat seaming machine according to claim 3, wherein: the wire clamping elastic sheet is further provided with an extending part which is arranged at intervals on the connecting part, one end of the extending part extends to form a deformable deformation part to be connected with the connecting part, the other end of the extending part forms an abutting part which is arranged at intervals on the wire clamping part, the wire cutting mechanism is further provided with an adjusting piece, the adjusting piece is locked on the connecting part through the extending part to change the interval distance between the connecting part and the extending part, so that the deformation part can generate deformation degrees of different degrees, and the abutting part can be in contact with the wire clamping part through the deformation parts of different deformation degrees to adjust the wire clamping acting force.

Images