CN219772441U - Column type flat seaming machine - Google Patents

Abstract

The utility model provides a column type flat seaming machine, comprising: the sewing machine comprises a sewing body, a curved needle, a main feeding tooth and a plurality of needles, wherein the sewing body is provided with a lower shaft and a needle plate, the lower shaft is parallel to the X-axis, the lower shaft can drive the curved needle to swing, the curved needle is matched with the plurality of needles to generate a thread hooking motion, the lower shaft can drive the main feeding tooth to move back and forth along the Y-axis and move up and down along the Z-axis at the same time, the plurality of needles can move along the Z-axis to pass through the needle plate, the needle plate is provided with a penetrating part which can be penetrated by the needle, the needle plate extends from the periphery of the penetrating part to form a surrounding part which presents an arc curve state, in addition, the height position of a plurality of rows of main feeding tooth blocks of main feeding teeth in the Z-axis direction gradually decreases along the direction far away from the needle, so that the rows of main feeding tooth blocks are arranged together to form the arc curve state, therefore, the cylindrical flat seaming machine can seam materials in a curved surface shape, and practicability of the cylindrical flat seaming machine is improved.

Description

Column type flat seaming machine

Technical Field

The utility model relates to a flat seaming machine capable of producing chain type sewing stitches, in particular to a sewing material which can be used for sewing curved surfaces by a column type flat seaming machine.

Background

The sewing machine mainly combines a plurality of layers of sewing through sewing, and as technology continuously evolves, the sewing machine on the market at present has a plurality of styles, and sewing machines with different styles can be applied to sewing operations of different sewing objects, wherein the sewing machine on the market at present can selectively carry out sewing modes such as collar rolling, edge folding, flat seaming, splice seam or trimming on clothes.

Referring to fig. 1 and 2, a conventional column-type flat seaming machine 90 for sewing clothing or shoe uppers is shown, the conventional column-type flat seaming machine 90 has a sewing body 91, a needle bar mechanism 92, a presser foot mechanism 93 and a looper mechanism (not shown), as shown, the sewing body 91 has three parts of a head 911, a support 912 and a base 913, the interior of the head 911 has an upper shaft 914 capable of rotating, the interior of the base 913 has a lower shaft 915 parallel to the upper shaft 914, the lower shaft 915 is capable of rotating by the upper shaft 914, wherein the base 913 forms a column-type seat 916 arranged at intervals on the head 912 towards the head 911, a needle plate 917 below the needle bar mechanism 92 is mounted at the highest position of the column-type seat 916, and the needle plate 917 has a plurality of needle holes 917a.

The needle bar mechanism 92 has a plurality of needles 921, each needle 921 is located in one of the needle holes 917a of the needle plate 917, and the needle bar mechanism 92 is connected to the upper shaft 914 of the sewing body 91, so that the upper shaft 914 can drive the plurality of needles 921 to pass through the needle holes 917a when rotating, and the presser foot mechanism 93 has a presser foot 931 located at one side of the plurality of needles 921, and the presser foot 931 can approach or be far away from the needle plate 917, wherein the looper mechanism is located inside the column seat 916 of the sewing body 91, and the looper mechanism has a looper (not shown), wherein the looper mechanism is connected to the lower shaft 915 of the sewing body, so that the lower shaft 915 can drive the looper to swing when rotating through the upper shaft 914, and the looper can cooperate with the plurality of needles 921 to generate a thread hooking motion, so that a bobbin thread (not shown) passing through the looper can be interwoven with a plurality of threads (not shown) passing through the needle 921.

However, the needle plate 917 of the conventional column-type flat seaming machine 90 presents a planar appearance, that is, when the curved-surface-shaped sewing material abuts against the column-type seat 916 of the sewing body 91, the harder curved-surface-shaped material is not easy to be close to the needle plate 917, and an operator needs to hard bend the periphery of the sewing path of the material, so that when the conventional column-type flat seaming machine 90 wants to perform the sewing operation on the harder curved-surface-shaped material, the material is excessively extruded to generate wrinkles, resulting in uneven sewing and even excessive deformation of the material, and thus the conventional column-type flat seaming machine 90 is inconvenient to sew the curved-surface-shaped sewing material.

Disclosure of Invention

The utility model aims to improve the structural mode of a needle plate of a column type flat seaming machine and provide the column type flat seaming machine, so that the improved column type flat seaming machine is easy to sew curved surface-shaped sewing materials, the situation that the curved surface-shaped sewing materials are wrinkled in the sewing process of the improved column type flat seaming machine can be avoided, and the practicability of the column type flat seaming machine is further improved.

In order to achieve the above object, the present utility model provides a column-type flat seaming machine, which is set up in a cartesian coordinate system composed of an X-axis, a Y-axis and a Z-axis, and comprises: the sewing machine comprises a sewing body, a plurality of machine needles, a curved needle and a main feeding tooth, wherein the sewing body is provided with a lower shaft parallel to an X axis and a column-shaped seat formed by extending along the Z axis direction, one side of the column-shaped seat is provided with a needle plate, the needle plate forms a penetrating part positioned at the center of the needle plate and a surrounding part surrounding the penetrating part, the needle plate is provided with a plurality of needle holes and a main feeding through hole, the surrounding part is provided with an inner peripheral edge adjacent to the periphery of the penetrating part and an outer peripheral edge of a wheel expanding on the inner peripheral edge, and the surrounding part extends from the inner peripheral edge to the outer peripheral edge in an arc curved path, so that the surrounding part presents an arc curved state.

Each needle is individually located at one of the needle holes, and the plurality of needles can approach or be far away from the needle plate along the Z axis, so that the needles can pass through the needle holes, the curved needle is driven by the lower axis to swing, the curved needle is matched with the plurality of needles to generate hooking movement, and the main feeding teeth are driven by the lower axis to move back and forth along the Y axis and move up and down along the Z axis at the same time in the main feeding through hole, wherein the main feeding teeth are provided with a plurality of main feeding teeth blocks arranged along the Y axis direction, and the height positions of the main feeding teeth blocks in the Z axis direction are gradually reduced along the Y axis direction and far away from the needle holes, so that the main feeding teeth blocks are arranged together to form an arc curved pattern on the surrounding part.

In a preferred embodiment, the cylindrical flat seaming machine further has a differential feeding tooth and a cutting mechanism, the differential feeding tooth is driven by the lower shaft to move back and forth along the Y axis and move up and down along the Z axis in a differential feeding through hole formed in the penetrating portion, the differential feeding tooth is provided with a plurality of differential feeding tooth blocks arranged along the Y axis, and the height positions of the differential feeding tooth blocks in the Z axis direction are gradually decreased away from the pinholes along the Y axis direction, so that the differential feeding tooth blocks are commonly arranged to form an arc shape on the surrounding portion.

In addition, the thread cutting mechanism includes: the fixed cutter is fixed on the column-shaped seat, the movable cutter is pivoted on a cutter pivoting shaft piece connected with the column-shaped seat, so that the movable cutter can move relative to the fixed cutter, the tangent line driving assembly can bring the movable cutter close to the fixed cutter, the movable cutter is matched with the fixed cutter to cut off a needle line penetrating through the needle and a bottom line penetrating through the curved needle, the cutter pivoting shaft piece is parallel to a Y shaft, the cutter pivoting shaft piece is perpendicular to the lower shaft, and the movable cutter can longitudinally swing.

In this embodiment, the curved pin is pivotally connected to a curved pin pivot member connected to the post base, and the curved pin pivot member is parallel to the cutter pivot member.

The axle center of the curved needle pin-joint axle piece is overlapped with the cutter pin-joint axle piece, so that the swing axle center of the curved needle is overlapped with the swing axle center of the movable cutter, and further the movable cutter and the curved needle can swing longitudinally.

Furthermore, the curved needle is connected with a curved needle protecting piece, and the curved needle protecting piece are driven by the lower shaft to swing synchronously, wherein the column type flat seaming machine is further provided with a needle protecting piece which is arranged in the Y-axis direction of the curved needle protecting piece and is connected with the lower shaft, so that the needle protecting piece is driven by the lower shaft to protect the needle from bending when moving along the Z-axis.

The utility model is characterized in that the needle plate of the sewing body extends around the penetrating part to form a surrounding part which presents an arc curve shape, so that the whole needle plate presents an arc curve-shaped appearance model, in addition, the height positions of the rows of main feeding tooth blocks of the main feeding teeth along the Y-axis direction gradually decrease along with the distance from the needle hole, so that the rows of main feeding tooth blocks are arranged together to be approximately in accordance with the arc curve shape of the needle plate surrounding part, when the curved surface-shaped sewing material is abutted against the needle plate of the column seat, the curved surface-shaped sewing material is easy to contact with the plurality of main feeding tooth blocks which are arranged in the arc curve shape, the curved surface-shaped sewing material can contact with the surrounding part, and then the curved surface-shaped sewing material can be abutted against the needle plate as much as possible to avoid excessive deformation of the sewing material, when the column-shaped sewing machine carries out the sewing operation on the curved surface-shaped sewing material, the curved surface-shaped sewing material can be reduced to generate crease, even uneven stitching opportunities after sewing can be avoided, and the practicability of the column-shaped sewing machine can be improved.

Drawings

FIG. 1 is a perspective view of a conventional column-type flat seaming machine;

FIG. 2 is a side view of a prior art column-type flat seaming machine;

FIG. 3 is a perspective view of the column-type flat seaming machine of the present utility model;

FIG. 4 is a schematic view of the assembly of the feeding mechanism, the looper mechanism, the thread cutting mechanism and the needle protecting mechanism to the column base;

FIG. 5 is an exploded view of the feed mechanism, looper mechanism, thread cutting mechanism and needle guard mechanism;

fig. 6A is a perspective view of a needle plate;

fig. 6B is a top view of the needle plate;

FIG. 6C is a cross-sectional view of section A-A of FIG. 6B;

FIG. 6D is a cross-sectional view of section B-B of FIG. 6B;

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

FIG. 7B is a partial side view of the feed mechanism;

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

FIG. 9 is a schematic view of a thread cutting mechanism;

FIG. 10 is an exploded view of the needle guard mechanism;

fig. 11 is a schematic view of a column-type flat seaming machine sewing stitching material.

Reference numerals illustrate: 1-column type flat seaming machine; 10-sewing a body; 11-headstock; 12-supporting columns; 13-a base; 131-a work surface; 14-upper shaft; 15-lower shaft; 16-column type seat; 161-looper shaft struts; 162-needle plate; 162 A-A penetration; 162a 1-pinhole; 162a 2-main feed throughs; 162a 3-differential feed throughs; 162 b-a surrounding portion; 162b 1-inner peripheral edge; 162b 2-peripheral edge; 162b 3-front curve; 162b 4-rear curve; 162b 5-left arc; 162b 6-right arc curve; 17-the curved needle pin joint shaft piece; 18-the cutter is pivoted with a shaft piece; 20-a needle bar mechanism; 21-a needle bar; 22-machine needle; 30-a presser foot mechanism; 31-presser foot; 40-a feeding mechanism; 41-a main feed assembly; 411-main feed teeth; 411 a-main feed tooth block; 412-a main feed link; 412 A-A main slot; 412 b-a main slider; 413-a main feed drive assembly; 42-a differential feed assembly; 421-differential feed teeth; 421 a-differential feed tooth block; 422-differential feed linkage; 422 a-differential slot; 422 b-differential slide; 423-a differential feed drive assembly; 43-a plug pin; 50-a looper mechanism; 51-a curved needle drive assembly; 511-a curved needle eccentric; 512-bearing sleeve; 52-a curved needle linkage rod; 53-bending the needle stand; 54-bending the needle; 55-bending needle protecting piece; 60-a wire cutting mechanism; 61-fixing the cutter; 62-a movable cutter; 63-a tangential drive assembly; 631-a tangent movable lever; 632-tangential drive source; 70-a needle protection mechanism; 71-a needle guard drive assembly; 711-protecting needle eccentric wheel; 712-needle-protecting slider; 72-protecting needle linkage rod; 721-recess; 73-a needle protection seat; 74-needle guard; 80-sewing material; an L-arc path; 90-an existing column type flat seaming machine; 91-a sewing body; 911-vehicle head; 912-struts; 913-a base; 914-upper shaft; 915-lower shaft; 916-column type seat; 917-needle plate; 917 a-pinhole; 92-needle bar mechanism; 921-machine needle; 93-presser foot mechanism; 931-presser foot.

Detailed Description

The advantages and features of the present utility model will become more apparent from the following description when taken in conjunction with the accompanying drawings and detailed description.

In the drawings of the present utility model, there is a cartesian rectangular coordinate system composed of an X-axis, a Y-axis, and a Z-axis, wherein both sides of the X-axis refer to the left and right sides of the column-type flat seaming machine 1, both sides of the Y-axis refer to the front and rear sides of the column-type flat seaming machine 1, both sides of the Z-axis refer to the upper and lower sides of the column-type flat seaming machine 1, and further, in the present utility model, directional terms such as "front", "rear", "left", "right", "up", "down" and the like refer to the direction in which the operator of the sewing machine is presented to the column-type flat seaming machine 1.

Referring to fig. 3, 4 and 5, the flat seaming machine 1 of the present utility model is mainly composed of a sewing body 10, a needle bar mechanism 20, a presser foot mechanism 30, a feeding mechanism 40, a looper mechanism 50, a thread cutting mechanism 60 and a needle protecting mechanism 70, wherein the sewing body 10 mainly comprises three parts of a head 11, a pillar 12 and a base 13, the head 11 has an upper shaft 14 capable of rotating around an X axis, the base 13 has a lower shaft 15 parallel to the X axis, the lower shaft 15 is capable of synchronously rotating through the upper shaft 14, wherein the base 13 has a table top 131 facing the head 11, and the base 13 forms a pillar base 16 located below the head 11 along a Z axis from the table top 131, wherein the pillar base 16 has a bent needle shaft pillar 161 having a hollow interior and a needle plate 162 assembled at the top of the bent needle shaft pillar 161, the looper shaft post 161 has a looper pivot shaft member 17 parallel to the Y-axis and a cutter pivot shaft member 18 parallel to the looper pivot shaft member 17 mounted therein such that the looper pivot shaft member 17 and the cutter pivot shaft member 18 are both perpendicular to the lower shaft 15, and in the preferred embodiment, the center of the looper pivot shaft member 17 overlaps the center of the cutter pivot shaft member 18, as shown in fig. 6A, 6B, 6C and 6D, the needle plate 162 has a penetration portion 162a located in the center region of the needle plate 162 and a surrounding portion 162B surrounding the penetration portion 162a, and the penetration portion 162a penetrates to form a plurality of needle holes 162a1, a main feed through hole 162a2 located in front of the needle hole 162a1 and a differential feed through hole 162a3 located behind the needle hole 162a1, wherein the main feed through hole 162a2 communicates with the differential feed through hole 162a3, the surrounding portion 162b has an inner peripheral edge 162b1 adjacent to the periphery of the penetrating portion 162a and an outer peripheral edge 162b2 extending from the inner peripheral edge 162b1 to the outer peripheral edge 162b1, and the outer peripheral edge 162b2 is lower than the inner peripheral edge 162b1, as shown in the figure, the surrounding portion 162b extends from the inner peripheral edge 162b1 to the outer peripheral edge along an arc curve path L, so that the surrounding portion 162b presents an arc shape, and further the whole needle plate 162 presents an arc shape, in this embodiment, the surrounding portion 162b extends on opposite front and rear sides of the penetrating portion 162a in the Y axis direction to form a front arc curved plate 162b3 and a rear arc curved plate 162b4 presenting an arc curved shape, and the surrounding portion 162b extends on opposite left and right sides of the penetrating portion 162a in the X axis direction to form a left arc curved plate 162b5 and a right arc plate 162b6 presenting an arc curved shape.

As shown in fig. 3, the needle bar mechanism 20 has a needle bar 21 substantially parallel to the Z axis, the needle bar 21 is assembled on the sewing body 10, and the lowest part of the needle bar 21 is provided with a plurality of needles 22 corresponding to the needle holes 162a1, wherein the upper shaft 14 rotates to drive the needle bar 21 to reciprocate up and down along the Z axis, so that each needle 22 can pass through one of the needle holes 162a1 by the needle bar 21 moving along the Z axis, whereby the plurality of needles 22 can approach or separate from the column base 16 of the sewing body 10 by the rotation of the upper shaft 14, each needle 22 is individually penetrated with a needle thread (not shown) so that when the needle 22 moves down to pass through the needle hole 162a1, the needle thread is brought into the needle hole 162a1 by the needle 22 moving, and a part of the needle thread is located inside the looper shaft support 161 of the column base 16, and the presser foot mechanism 30 has a presser foot 31 parallel to the needle bar 21, and the presser foot 31 is pressed down to the needle plate 162 by a pressing spring (not shown) to generate a pressing force to move down toward the needle plate 162a.

Referring to fig. 5, 7A and 7B, the feeding mechanism 40 is mainly located inside the column seat 16 of the sewing body 10, and the feeding mechanism 40 has a main feeding assembly 41 and a differential feeding assembly 42, wherein the main feeding assembly 41 has a main feeding tooth 411, a main feeding linkage 412 and a main feeding driving assembly 413, the main feeding tooth 411 is located at the main feeding through hole 162a2 of the needle plate 162, and the main feeding tooth 411 is assembled to the main feeding linkage 412, the main feeding tooth 411 is provided with a plurality of main feeding tooth blocks 411a arranged along the Y axis direction, the height positions of the plurality of main feeding tooth blocks 411a in the Z axis direction gradually decrease away from the needle hole 162a1 along the Y axis direction, so that the plurality of main feeding tooth blocks 411a are jointly arranged to form an arc curved pattern located at the front arc curved plate portion 162B3, the main feeding tooth 411 and the main feeding link 412 are connected with each other by way of assembling a sliding groove and a sliding rail, so that the main feeding tooth 411 can selectively adjust the height difference relative to the main feeding link 412, and further the relative height position between the main feeding tooth 411 and the needle plate 162 can be changed, in addition, the main feeding link 412 is positioned between the main feeding tooth 411 and the main feeding driving component 413, and a main long and narrow hole 412a is formed by penetrating a local area of the main feeding link 412, and the main feeding link 412 is provided with a main sliding block 412B at the position of the main long and narrow hole 412a, and a bolt 43 penetrates the main sliding block 412B to be pivotally connected to the curved needle shaft support 161 of the column base 16, so that the main feeding link 412 can swing relative to the curved needle shaft support 161, in addition, the main feeding driving component 413 is connected between the lower shaft 15 of the sewing body and the main feeding link 412, the main feeding driving assembly 413 can change the rotation motion of the lower shaft 15 into the forward and backward motion of the main feeding teeth 411 along the Y axis and the up and down motion along the Z axis, so that the main feeding teeth 411 can reciprocate forward and backward and up and down in the main feeding through holes 162a2 of the needle plate 162 at the same time, and the main feeding teeth 411 can generate an approximately elliptical motion track.

As shown in fig. 5, 7A and 7B, the differential feeding assembly 42 of the feeding mechanism 40 has a differential feeding tooth 421, a differential feeding linkage 422 and a differential feeding driving assembly 423, the differential feeding tooth 421 is located in the differential feeding through hole 162a3 of the needle plate 162, and the differential feeding tooth 421 is assembled to the differential feeding linkage 422, wherein the differential feeding tooth 421 is provided with a plurality of differential feeding tooth blocks 421a arranged along the Y-axis direction, the height positions of the differential feeding tooth blocks 421a along the Z-axis direction are gradually decreased away from the needle hole 162a1 along the Y-axis direction, so that the differential feeding tooth blocks 421a are commonly arranged to form an arc shape to be located in the rear arc curved plate 162B4, in this embodiment, the differential feeding tooth 421 and the differential feeding linkage 422 are mutually connected by assembling means of a chute and a slide rail, so that the differential feeding tooth 421 can selectively adjust the height difference relative to the differential feeding linkage 422, further, the relative height position between the differential feeding teeth 421 and the needle plate 162 can be changed, in addition, the differential feeding linkage 422 is located between the differential feeding teeth 421 and the differential feeding driving assembly 423, and the differential feeding linkage 422 is disposed in the X-axis direction of the main feeding linkage 412, wherein, a differential slit 422a is formed through a partial region of the differential feeding linkage 422, and a differential slider 422B penetrated by the latch 43 is disposed inside the differential slit 422a, so that the differential feeding linkage 422 can swing relative to the looper shaft support 161, in addition, the differential feeding driving assembly 423 is connected between the lower shaft 15 of the sewing body and the differential feeding linkage 422, and the differential feeding driving assembly 423 can change the rotation motion of the lower shaft 15 to allow the differential feeding teeth 421 to move back and forth and move up and down simultaneously, so that the differential feeding teeth 421 can reciprocate back and forth and up and down in the differential feeding through hole 162a3 of the faller 162 at the same time, and the differential feeding teeth 421 can generate a motion track of approximately elliptical shape.

Referring to fig. 5 and 8, the looper mechanism 50 is mainly composed of a looper driving assembly 51, a looper linkage rod 52 and a looper seat 53, wherein the looper driving assembly 51 has a looper eccentric 511 and a bearing sleeve 512, the looper eccentric 511 is connected to the lower shaft 15 of the sewing body 10, the bearing sleeve 512 is sleeved on the periphery of the looper eccentric 511, in addition, one end of the looper linkage rod 52 is pivoted on the periphery of the bearing sleeve 512, the other end of the looper linkage rod 52 is pivoted on the looper seat 53, the looper seat 53 is provided with a looper 54 close to the needle plate 162, the looper seat 54 is pivoted on the looper pivot shaft 17, and the looper seat 53 is connected with a looper protecting needle 55, so that the looper 54 and the looper protecting needle 55 can swing synchronously relative to the looper shaft 161, thereby, when the lower shaft 15 of the sewing body 10 rotates, the bearing sleeve 512 rotates around the lower shaft 15 through the looper eccentric 511, so that the looper linkage rod 52 can swing around the looper seat 52, and thus a plurality of loopers can swing the loopers (the looper needle seat 20) reciprocally, so that the looper needle seat 52 can not swing.

Referring to fig. 5 and 9, the thread cutting mechanism 60 is mounted on the cylindrical seat 16 of the sewing body 10, and the thread cutting mechanism 60 has a fixed cutter 61, a movable cutter 62 and a thread cutting driving component 63, wherein the fixed cutter 61 is connected to the needle plate 162 of the cylindrical seat 16, such that the fixed cutter 61 is close to the needle hole 162a1 of the needle plate 162, and further the height position of the fixed cutter 61 is higher than the cutter pivot shaft 18 of the looper shaft support 161, and the movable cutter 62 is pivoted to the cutter pivot shaft 18, such that the movable cutter 62 can swing relative to the fixed cutter 61 inside the looper shaft support 161 of the cylindrical seat 16, as shown in the drawing, because the movable cutter 62 is pivoted to the cutter pivot shaft 18, such that the height position of the movable cutter 62 is lower than the fixed cutter 61, and in addition, the thread cutting driving component 63 has a thread cutting movable rod 631 located inside the looper shaft support 161 and a thread cutting driving source 632 located inside the base 13, one end of the thread cutting movable rod 631 is connected to the central region of the movable cutter 62, and the other end of the thread cutting movable rod 631 is connected to the thread cutting driving source 632, and the movable cutter rod 631 can selectively swing relative to the looper shaft 161 along the looper shaft 61 to the looper shaft 18, such that the movable cutter shaft 631 can swing relative to the looper shaft 62 to the fixed cutter shaft 18.

Referring to fig. 5 and 10, the needle protecting mechanism 70 is mainly composed of a needle protecting driving component 71, a needle protecting linkage rod 72 and a needle protecting seat 73, wherein the needle protecting driving component 71 is provided with a needle protecting eccentric wheel 711 and a needle protecting sliding block 712, the needle protecting eccentric wheel 711 is connected to the lower shaft 15 of the sewing body 10, the needle protecting sliding block 712 is sleeved on the periphery of the needle protecting eccentric wheel 711, in addition, one end of the needle protecting linkage rod 72 is provided with a concave part 721 to be sleeved on the needle protecting sliding block 712, and the other end of the needle protecting linkage rod 72 is connected to the needle protecting seat 73, wherein the needle protecting seat 73 is provided with a needle protecting part 74 close to the needle plate 162, and the needle protecting part 74 is arranged in the Y-axis direction of the curved needle protecting part 55, thereby, when the needle protecting eccentric wheel 711 rotates around the lower shaft 15 of the sewing body 10, the needle protecting eccentric wheel 711 can drive the needle protecting sliding block 712 to move along the Y-axis direction and the Z-axis direction simultaneously, and the needle protecting sliding block 712 can move along the Y-axis direction and the Z-axis direction simultaneously along the Y-axis direction and the Z-axis direction along the needle protecting sliding block 22 can be prevented from moving along the needle protecting needle 22, and the needle protecting needle 22 can move along the needle protecting needle 22 in the Z-axis direction along the needle protecting needle bar 22 when the needle protecting seat 22 is driven by the needle protecting needle bar 22 and the needle protecting needle linking rod 22.

Referring to fig. 11, in a specific application of sewing material 80 with a curved surface shape in the column flat seaming machine 1, the sewing material 80 with a curved surface shape is placed on the needle plate 162 of the sewing body 10, because the front curved plate 162b3, the rear curved plate 162b4, the left curved plate 162b5 and the right curved plate 162b6 of the surrounding portion 162b of the needle plate 162 can effectively avoid the sewing material 80, so that the sewing material 80 with a curved surface shape can contact the penetrating portion 162a of the needle plate 162, and the sewing material 80 with a curved surface shape can simultaneously contact the main feeding tooth 411a of the main feeding tooth 411 and the differential feeding tooth 412a of the differential feeding tooth, so that the sewing material 80 with a curved surface shape can be abutted against the needle plate 162 as much as possible to avoid gaps between the sewing material 80 and the needle plate 162, and the presser foot mechanism 30 31 can contact the penetrating portion 162a of the presser foot 162, thereby reducing the occurrence of wrinkles when the sewing material 80 with a curved surface shape is abutted against the needle plate 31, and preventing the needle bar mechanism 20 from moving uniformly and preventing the needle bar mechanism 20 from passing through the curved surface of the sewing material 54 and the needle bar machine from being sewn.

The above description is illustrative of the utility model and is not restrictive, and it will be appreciated by those skilled in the art that many modifications, changes, or equivalents may be made without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims (7)

1. A column-type flat seaming machine set up in a cartesian coordinate system consisting of an X-axis, a Y-axis and a Z-axis, comprising:

the sewing machine comprises a sewing body, a needle plate and a sewing machine, wherein the sewing body is provided with a lower shaft parallel to an X axis and a column-shaped seat formed by extending along a Z axis, one side of the column-shaped seat is provided with the needle plate, the needle plate is provided with a penetrating part positioned in the center of the needle plate and a surrounding part surrounding the penetrating part, the needle plate is provided with a plurality of needle holes and a main feeding through hole, the surrounding part is provided with an inner peripheral edge adjacent to the periphery of the penetrating part and an outer peripheral edge which is expanded on the inner peripheral edge, and the surrounding part extends from the inner peripheral edge to the outer peripheral edge in an arc path, so that the surrounding part presents an arc curve shape;

a plurality of needles each individually positioned at one of the needle holes, and the plurality of needles being capable of being moved toward or away from the needle plate along the Z-axis so that the needles can pass through the needle holes;

the curved needle is driven by the lower shaft to swing, so that the curved needle is matched with the plurality of machine needles to generate hooking movement; and

the main feeding teeth are driven by the lower shaft and can move back and forth along the Y axis and move up and down along the Z axis at the same time in the main feeding through hole, the main feeding teeth are provided with a plurality of main feeding tooth blocks arranged along the Y axis direction, the height positions of the main feeding tooth blocks in the Z axis direction are gradually decreased away from the pinholes along the Y axis direction, and the main feeding tooth blocks are arranged together to form an arc curve pattern on the surrounding part.

2. The machine according to claim 1, further comprising a differential feeding tooth driven by the lower shaft to move back and forth along the Y-axis and up and down along the Z-axis in a differential feeding through hole formed in the penetrating portion, wherein the differential feeding tooth is provided with a plurality of differential feeding tooth blocks arranged along the Y-axis, and the height positions of the differential feeding tooth blocks in the Z-axis direction are gradually decreased away from the needle hole along the Y-axis direction, so that the differential feeding tooth blocks are commonly arranged to form an arc shape on the surrounding portion.

3. The column-type flat seaming machine according to claim 1, further comprising a thread cutting mechanism comprising:

the fixed cutter is fixed on the column-shaped seat;

the movable cutter is pivoted with a cutter pivot shaft piece connected with the column-shaped seat, so that the movable cutter can move relative to the fixed cutter; and

the tangent line driving assembly can bring the movable cutter close to the fixed cutter, so that the movable cutter can cut off a needle line penetrating through the needle and a bottom line penetrating through the curved needle by matching with the fixed cutter;

the cutter pin-joint shaft piece is parallel to the Y axis, so that the cutter pin-joint shaft piece is perpendicular to the lower axis, and the movable cutter can swing longitudinally.

4. The flat seaming machine according to claim 3, wherein the loopers are pivotally connected to a looper pivot shaft connected to the column base, and the looper pivot shaft is parallel to the cutter pivot shaft.

5. The column-type flat seaming machine according to claim 4, wherein the pivot of the looper pivot overlaps the cutter pivot such that the swing pivot of the looper overlaps the swing pivot of the movable cutter, whereby both the movable cutter and looper can swing longitudinally.

6. The flat seaming machine according to claim 1, wherein the loopers are connected with a looper guard, and both the loopers and the looper guard are driven by the lower shaft to swing synchronously.

7. The flat seaming machine according to claim 6, further comprising a needle guard arranged in a Y-axis direction of the curved needle guard and connected to the lower shaft such that the needle guard is driven by the lower shaft to protect the needle from bending when moving along the Z-axis.