CN110872744B

CN110872744B - Double-needle edge-covering sewing machine

Info

Publication number: CN110872744B
Application number: CN201811025773.XA
Authority: CN
Inventors: 陈旭辉
Original assignee: Cheesiang Sewing Machine SH Co ltd; Chee Siang Industrial Co Ltd
Current assignee: Cheesiang Sewing Machine SH Co ltd; Chee Siang Industrial Co Ltd
Priority date: 2018-09-04
Filing date: 2018-09-04
Publication date: 2021-05-25
Anticipated expiration: 2038-09-04
Also published as: CN110872744A

Abstract

The invention relates to a double-needle edge-covering sewing machine, which is provided with a needle bar mechanism, a hemmer and a feeding mechanism, wherein the needle bar mechanism is sequentially provided with two needles along a sewing path, the hemmer can sequentially move edge-covering materials along a feeding path and a discharging path, the feeding mechanism can simultaneously drive the edge-covering materials and sewing cloth to respectively move along the discharging path and the sewing path, so that the sewing cloth sequentially passes through the two needles, the edge-covering materials only pass through one needle, one machine stitches the sewing cloth to form a stitch, and the other needle stitches the edge-covering materials to the sewing cloth to cover the stitch, thereby completing the sewing operation and the edge-covering operation in one operation flow.

Description

Double-needle edge-covering sewing machine

Technical Field

The invention relates to a sewing machine for sewing a backpack or a handbag, in particular to a double-needle edge-covering sewing machine which can simultaneously complete sewing operation and edge-covering operation so as to improve production efficiency.

Background

The sewing machine mainly combines a plurality of layers of sewing materials by sewing threads, and various application requirements are continuously increased, so that the sewing machines on the market have various styles, and the sewing machines with different styles can be applied to sewing operation of different sewing materials.

Currently, a backpack or a handbag is mainly sewn by a sewing machine, when the backpack or the handbag is to be produced, two sewn fabrics are sewn and connected with each other by a flat sewing machine to form a sewing material, then the sewing material is moved to an edge-covering sewing machine, the edge-covering sewing machine sews an edge-covering material along the edge of the sewing material, and the edge-covering material is sewn and fixed on the sewing material.

As described above, in the case of manufacturing a backpack or a handbag, it is necessary to perform a sewing operation of sewing two sewn fabrics together and a hemming operation of sewing a hemming material to the edge of a sewn article after the sewing operation is completed.

Disclosure of Invention

The invention mainly aims to carry out sewing operation for sewing two sewing fabrics with each other, and simultaneously carry out edge covering operation for sewing edge covering materials on the edges of the two sewing fabrics, thereby shortening the operation time to improve the production efficiency.

To achieve the above objects, the present invention relates to a double needle hemming sewing machine which can fasten a hemming material to a sewing fabric along a sewing path and is mainly composed of a needle bar mechanism, a hemmer, and a feeding mechanism.

The needle bar mechanism is provided with a first needle and a second needle, the first needle and the second needle are arranged at intervals along the sewing path in sequence, the hemmer is provided with a guide part positioned between the first needle and the second needle, the guide part can move the edge covering material from a feeding path which is intersected with the sewing path at first and then move along a discharging path which is parallel to the sewing path to cover the edge covering material on the sewing cloth, in addition, the feeding mechanism can drive the sewing cloth to move along the sewing path and simultaneously drive the edge covering material to move through the second needle along the discharging path, wherein the first needle can stitch the sewing cloth to form a first stitch, and the second needle fixes the edge covering material and the sewing cloth to form a second stitch, the second traces are exposed out of the surface of the edge covering material, and the first traces are covered by the edge covering material.

In a preferred embodiment, the first needle and the second needle both present a straight pattern parallel to the sewing path such that the second stitch overlaps the first stitch, and in another preferred embodiment, the first needle and the second needle present a diagonal pattern offset from the sewing path such that the second stitch is spaced apart from the first stitch.

In addition, the feeding mechanism is concavely arranged on one side close to the guide part to form a penetrating space, and the penetrating space is used for accommodating one part of the guide part.

In this embodiment, the feeding mechanism has a needle plate, a feeding tooth, an inner presser foot and an outer presser foot, wherein the needle plate is positioned below the needle bar mechanism, and a needle plate groove is formed at one side close to the needle bar mechanism in a concave manner, the feeding teeth can move relative to the needle plate and are concavely provided with a feeding tooth groove communicated with the needle plate groove, wherein the inner presser foot is positioned above the feeding teeth and can drive the edge covering material and the sewing cloth to move together with the feeding teeth, one side of the inner presser foot close to the feeding teeth is concavely provided with an inner presser foot groove corresponding to the feeding teeth groove, so that the needle plate groove, the feeding tooth groove and the inner presser foot groove together form the penetrating space, the outer pressure foot is positioned above the needle plate and can clamp the edge-covering material and the sewing cloth together with the needle plate.

The invention is characterized in that two machine needles are arranged in sequence along a sewing path, and a guide part of a hemmer can change an action path of a binding material, so that the binding material can be changed from a feeding path to a discharging path to move, the sewing material sequentially passes through a first machine needle and a second machine needle along the sewing path, and simultaneously the binding material only passes through the second machine needle along the discharging path, thereby, when the sewing operation of sewing the sewing material is carried out, the binding operation of sewing the binding material on the edge of the sewing material can be carried out simultaneously, and the operation time can be further shortened to improve the production efficiency.

Drawings

FIG. 1 is a perspective view of a double needle overedge seam machine;

FIG. 2 is a schematic view of the needle bar mechanism, the hemmer and the feeding mechanism relative to the sewing machine body;

FIG. 3 is a schematic view showing the arrangement of the needle bar mechanism, the hemmer and the feeding mechanism;

FIG. 4 is a schematic diagram of the first needle and the second needle arranged in a diagonal arrangement;

FIG. 5 is a schematic view of the protrusion of the guide penetrating between the first needle and the second needle;

FIG. 6A is a perspective view of the feed mechanism;

FIG. 6B is a side view of the feed mechanism;

FIG. 6C is an exploded view of the feed mechanism;

FIG. 7A is a schematic view of the hemming material being inserted through the hemmer;

FIG. 7B is a schematic view of the operation of the needle bar mechanism and the feeding mechanism;

FIG. 7C is a schematic view of the binding material being sewn to two sewn panels;

FIG. 7D is a schematic view of the covering material covering the first trace;

FIG. 8A is a schematic diagram of a first pin being vertically aligned with a second pin;

FIG. 8B is a schematic diagram illustrating the second trace overlapping the first trace;

FIG. 8C is a schematic diagram of the first pin being arranged offset from the second pin;

fig. 8D is a schematic diagram of the first trace being arranged at intervals on the second trace.

Description of reference numerals: 1-double needle edge-covering sewing machine; 10-sewing machine body; 11-vehicle head; 12-a pillar; 13-a base; 14-a containing space; 20-a needle bar mechanism; 21-needle clip; 22-a first needle; 23-a second needle; 30-a hemmer; 31-a guide; 311-an opening; 312-a bump; 40-a feeding mechanism; 41-feeding teeth; 411-feeding tooth groove; 42-a presser foot assembly; 421-inner presser foot; 421 a-inner pin groove; 422-outer presser foot; 43-needle plate; 431-pin holes; 432-needle plate grooves; 44-a through space; 50-edge covering material; 51-sewing cloth; 511-stitching blocks; d1-stitching path; d2-feed path; d3 — discharge path; l1 — first trace; l2-second trace.

Detailed Description

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

In the present specification, directional terms such as "front", "rear", "left", "right", "up", "down", and the like refer to directions faced by a sewing machine operator.

Referring to fig. 1 and 2, a double needle hemming sewing machine 1 of the present invention includes a sewing machine body 10, the sewing machine body 10 includes a head 11, a pillar 12 and a base 13, and a receiving space 14 for passing a cloth is formed between the head 11, the pillar 12 and the base 13, wherein an upper shaft (not shown) parallel to an X-axis direction is assembled in the head 11 and connected to a needle bar mechanism 20 assembled in the head 11, a hemmer 30 is assembled outside the base 13 and located in the receiving space 14, a lower shaft (not shown) parallel to the upper shaft is assembled in the base 13 and driven by the upper shaft to rotate, and a feeding mechanism 40 is provided between the head 11 and the base 13 and connected to the upper shaft and the lower shaft at the same time, thereby, in this embodiment, the double needle hemming sewing machine 1 of the present invention mainly comprises the sewing machine body 10, a sewing machine body 14, a sewing machine body 12, and a sewing machine body 13, a needle bar mechanism 20, a hemmer 30 and a feeding mechanism 40.

Referring to fig. 3 and 4, the needle bar mechanism 20 has a needle holder 21 located in the accommodating space 14, and the needle holder 21 is provided with a first needle 22 close to the operator of the sewing machine and a second needle 23 far from the operator of the sewing machine at one end close to the base 13.

As shown in fig. 4, the first needle 22 and the second needle 23 are spaced apart from each other along a sewing path D1 parallel to the Y-axis, and the first needle 22 and the second needle 23 are arranged together in a diagonal arrangement offset from the sewing path D1, wherein the first needle 22 is further away from the pillar 12 of the sewing machine body 10 than the operator, and the second needle 23 is further away from the operator than the first needle 22 is from the pillar 12.

Referring to fig. 5, the hemming device 30 is used for passing a hemming material 50 (shown in fig. 7A), and a guide portion 31 is provided at an end near the needle bar mechanism 20 between the first needle 22 and the second needle 23, the guide portion 31 can change a moving path of the hemming material 50, so that the hemming material 50 can move from a feeding path D2 (shown in fig. 7A) intersecting a sewing path D1 (parallel to the X axis) to a discharging path D3 (shown in fig. 7A) parallel to a sewing path D1 (parallel to the Y axis), and the guide portion 31 can change a shape of the hemming material 50 in addition to the moving path of the hemming material 50, as shown in the figure, a portion of the guide portion 31 forms an opening 311 close to the sewing machine operator, and the remaining portion of the guide portion 31 forms a projection 312 far from the sewing machine operator, here, the bump 312 is located between the first needle 22 and the second needle 23, so that the opening 311 is located on the outer peripheral side of the first needle 22.

Referring to fig. 6A to 6C, in order to clearly show the structure of the feeding mechanism 40, the sewing machine body 10, the needle bar mechanism 20 and the hemmer 30 are omitted, and as shown in the figure, the feeding mechanism 40 has a feeding tooth 41 capable of moving by being driven by a lower shaft (not shown), a presser foot assembly 42 mounted on the headstock 11 and a needle plate 43 mounted on the base 13.

As shown in the figure, a part of the feeding teeth 41 is located inside the base 13 of the sewing machine body 10, and the upper part of the feeding teeth 41 passes through a needle plate hole 431 formed in the needle plate 43, and the feeding teeth 41 are recessed on the side close to the needle bar mechanism 20 to form a feeding teeth recess 411 located inside the needle plate hole 431, wherein, the presser foot assembly 42 has an inner presser foot 421 located right above the feeding teeth 41 and an outer presser foot 422 located right above the needle plate 43, the inner presser foot 421 is recessed on the side close to the feeding teeth 41 to form an inner presser foot recess 421a corresponding to the feeding teeth recess 411, in addition, the needle plate 43 is recessed to form a needle plate recess 432 connected to the needle plate hole 431, and the needle plate recess 432 is close to the needle bar mechanism 20 and connected to the feeding teeth recess 411, so that the feeding teeth recess 411, the inner presser foot recess 421a and the needle plate recess 432 jointly form a penetrating space 44 close to the guide portion 31, as shown in fig. 5, when the guide portion 31 of the hemmer 30 is positioned between the first needle 22 and the second needle 23, the projection 312 of the guide portion 31 is positioned inside the penetration space 44.

Referring to fig. 7A, the binding material 50 is inserted into the hemmer 30 along the feeding path D2, so that the binding material 50 penetrates into a space between the first needle 22 and the second needle 23, the binding material 50 changes its shape through the guide 31 to assume a U-shape, and the movement path is changed to extend the binding material 50 in a direction away from the sewing machine operator along the discharge path D3, and then, as shown in fig. 7B, the upper shaft and the lower shaft are rotated simultaneously, so that the rotating upper shaft can drive the needle clamp 21 of the needle bar mechanism 20 to move along an approximately elliptical motion track, further, the first needle 22 and the second needle 23 reciprocate back and forth and up and down along the Y axis and the Z axis at the same time, the rotating lower shaft can drive the feeding teeth 41 of the feeding mechanism 40 to reciprocate back and forth along the Y-axis direction, so that the feeding teeth 41 and the needle clip 21 can synchronously reciprocate back and forth along the Y axis.

As shown in the figure, when the upper shaft rotates, the upper shaft can also drive the inner presser foot 421 of the presser foot assembly 42 to reciprocate back and forth and up and down along the Y axis and the Z axis and drive the outer presser foot 422 of the presser foot assembly 42 to reciprocate up and down along the Z axis, wherein when the inner presser foot 421 is driven by the upper shaft to move towards the feeding teeth 41, the outer presser foot 422 is driven by the upper shaft to be away from the needle plate 17.

Referring to fig. 7C, two sewing fabrics 51 are overlapped with each other, and the two sewing fabrics 51 are moved into the accommodating space 14 of the sewing machine body 10 along a sewing path D1, in this embodiment, the right edges of the two sewing fabrics 51 are provided with a sewing block 511 capable of being covered by the hemming material 50, as shown in the figure, when the sewing block 511 of the two sewing fabrics 51 is close to the opening 311 of the hemmer 30, the inner presser foot 421 and the feed tooth 41 are respectively close to each other through the upper shaft and the lower shaft, so that the inner presser foot 421 and the feed tooth 41 clamp the hemming material 50 and the two sewing fabrics 51 together, and the inner presser foot 421 and the feed tooth 41 drive the two sewing fabrics 51 to move along the sewing path D1 together, and simultaneously the inner presser foot 421 and the feed tooth 41 drive the hemming material 50 to move along the feeding path D2 together, and then move along the discharge path D3 through the guide portion 31, so that the two sewing fabrics 51 pass under the first needle 22 and then pass under the second needle 23, and the two sewing fabrics 51 move out of the accommodating space 14 in a direction away from the operator of the sewing machine, and the edge covering material 50 only passes under the second needle 23 and also moves out of the accommodating space 14 in a direction away from the operator of the sewing machine, wherein when the inner presser foot 421 and the feeding teeth 41 drive the edge covering material 50 and the two sewing fabrics 51 to move together, the guiding portion 31 can also move back and forth with the feeding teeth 41 and the inner presser foot 421.

When the inner press foot 421 and the feeding tooth 41 clamp the edge-covering material 50 and the two sewing fabrics 51 together, the first needle 22 and the second needle 23, respectively, move downward, simultaneously entraining a suture, such that the first needle 22 passes through the stitching block 511, the second needle 23 penetrates through the edge covering material 50 and the sewing block 511, and then, the inner presser foot 421 and the feeding tooth 41 are matched to simultaneously drive the edge covering material 50 and the two sewing cloth 51 to synchronously move along the discharging path D3 and the sewing path D1 respectively, so that the first needle 22 performs the sewing operation of sewing and fixing the two sewing cloth 51, while the second needle 23 performs a hemming operation for sewing and fixing the edges of the sewing cloths 51 of the hemming material 50 to the sewing block 511 at the same time, in this embodiment, when the binding material 50 and the two sewing cloths 51 move along the discharge path D3 and the sewing path D1, respectively, the first needle 22 and the second needle 23 also reciprocate along the Y axis at the same time.

When the sewing operation is completed, a first stitch L1 located in the sewing block 511 is formed on the surface of the sewing cloth 51, and when the package change operation is completed, the binding material 50 covers the sewing block 511, so that the first stitch L1 is formed, and a second stitch L2 located on the right side of the first stitch L1 is formed on the surface of the binding material 50.

However, the second stitch L2 is located at the right side of the first stitch L1 for convenience of illustration only, that is, as shown in fig. 8A and 8B, the first needle 22 is linearly arranged back and forth on the second needle 23, so that the first needle 22 and the second needle 23 are arranged in a straight line parallel to the sewing path D1, and the second stitch L2 is overlapped with the first stitch L1, or as shown in fig. 8C and 8D, the first needle 22 is close to the pillar 12 of the sewing machine body 10, and the second needle 23 is far from the pillar 12 of the sewing machine body 10, so that the first needle 22 and the second needle 23 are arranged to be offset to be inclined to the sewing path D1, and the second stitch L2 is located at the left side of the first stitch L1.

The foregoing description and examples are exemplary only, and are not intended to limit the scope of the invention in any way. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention, and that such changes and modifications may be made without departing from the spirit and scope of the invention.

Claims

1. A two-needle hemming machine capable of securing a hem material to a sewn fabric along a sewing path, the two-needle hemming machine comprising:

a needle bar mechanism having a first needle and a second needle, the first needle and the second needle being spaced apart in sequence along the stitching path;

a hemmer having a guide portion between the first needle and the second needle, the guide portion being capable of changing the hemming material from a feed path intersecting the sewing path to a discharge path parallel to the sewing path for movement to cover the hemming material on the sewing material; and

the feeding mechanism can drive the sewing cloth to sequentially pass through the first needle and the second needle along the sewing path and simultaneously drive the edge covering material to move through the second needle along the discharging path, and a penetrating space is concavely arranged on one side close to the guide part of the feeding mechanism and used for accommodating one part of the guide part;

the sewing material is sewn by the first machine needle to form a first stitch, the edge covering material and the sewing material are sewn and fixed by the second machine needle to form a second stitch, the second stitch is exposed on the surface of the edge covering material, and the first stitch is covered by the edge covering material.

2. The double needle hemming sewing machine of claim 1, wherein: the first needle and the second needle both present a straight line pattern parallel to the sewing path, such that the second stitch is coincident with the first stitch.

3. The double needle hemming sewing machine of claim 1, wherein: the first machine needle and the second machine needle are in a slant line arrangement state deviating from the sewing path, so that the second stitch and the first stitch are arranged at intervals.

4. The double needle hemming sewing machine of claim 1, wherein: the feed mechanism comprises:

the needle plate is positioned below the needle bar mechanism, and a needle plate groove is formed on one side close to the needle bar mechanism in a concave mode;

the feeding teeth can move relative to the needle plate and are concavely provided with a feeding tooth groove communicated with the needle plate groove;

the inner presser foot is positioned above the feeding teeth and can drive the edge covering material and the sewing cloth to move together with the feeding teeth, and one side of the inner presser foot close to the feeding teeth is concavely provided with an inner presser foot groove corresponding to the feeding tooth groove, so that the needle plate groove, the feeding tooth groove and the inner presser foot groove form the penetrating space together; and

and the outer presser foot is positioned above the needle plate and can clamp the edge covering material and the sewing cloth together with the needle plate.