TW202009341A - Bounding edge sewing machine with double needles - Google Patents

Abstract

The present invention relates to a bounding edge sewing machine with double needles, including a needle mechanism, a curling mechanism and a feeding mechanism. The needle mechanism has two needles following a sewing path. The curling mechanism can move a bounding edge cloth following a feeding path and an unloading path in sequence. The feeding mechanism can drive the bounding edge cloth and a sewing cloth moving simultaneously following the unloading path and sewing path respectively. So that the sewing cloth passes through two needles in sequence, and the bounding edge cloth only passes through one needle. As a result, one of the needles sews the sewing cloth to generate a stitch; the other needle sews the bounding edge cloth on the sewing cloth, so the bounding edge cloth can cover the stitch. Therefore, the present invention can finish both sewing and bounding process in one standard processing procedure.

Description

Double needle overlock sewing machine

The invention relates to a sewing machine for sewing backpacks or handbags, in particular to a double-needle hemming sewing machine which can simultaneously complete sewing operations and hemming operations to improve production efficiency.

The sewing machine mainly combines several layers of stitched objects through stitching, and with the increasing demand for various applications, there are many types of sewing machines on the market, and different types of sewing machines can be applied to Sewing operations for different sewing objects.

At present, backpacks or handbags are mainly sewn by sewing machines. When a backpack or handbag is to be produced, two sewing fabrics must be stitched together by a sewing machine to form a stitch. The object is moved to the edge sewing machine, and the edge sewing machine sews the edge material along the edge of the stitched material, so that the edge material is sewn and fixed to the stitched material.

It can be seen that at present, the production of backpacks or handbags requires the sewing operation of sewing the two sewn fabrics to each other, and the sewing operation of sewing the hemming material to the edge of the stitched material can be carried out after the sewing operation is completed, so It takes a lot of production time to complete a backpack or handbag, and it is difficult to improve production efficiency.

The main purpose of the present invention is to perform the sewing operation of sewing two sewn fabrics to each other, and also to perform the selvaging operation of sewing the selvage material to the edges of the two sewn fabrics, thereby shortening the working time and improving the production Efficient, and, when the hemming operation is completed, the hemming material can cover one of the stitches, so that the stitches are hidden without being exposed, thereby preventing the stitches from being damaged due to the exposure and meeting the requirements of aesthetics.

In order to achieve the foregoing object, the present invention relates to a double-needle overlock sewing machine, which can sew and fix an overlock material to a sewn fabric along a sewing path, and is mainly composed of a needle bar mechanism , A curling device and a feeding mechanism.

The needle bar mechanism has a first needle and a second needle. The first needle and the second needle are sequentially spaced along the sewing path, and the curler has a first needle located on the first needle. The guide part between the second needle and the guide part can move the hemming material through a feeding path intersecting the sewing path first, and then follow a parallel path to the sewing path The discharge path moves to cover the sewn material with the sewn material, and the feed mechanism can drive the sewn material to move along the sewn path, and simultaneously drive the selvage material with the sewn material. The material path moves past the second needle, wherein the first needle can sew the sewn fabric to form a first stitch, and the second needle stitches the overwrapping material to the sewn fabric It is fixed to form a second stitch, and the second stitch is exposed on the surface of the encapsulating material, and the first stitch is covered by the encapsulating material.

In a preferred embodiment, both the first needle and the second needle present a straight line parallel to the sewing path, so that the second stitch overlaps the first stitch, and the other stitch In a preferred embodiment, the first needle and the second needle are arranged in an oblique line that is located on the sewing path, so that the second stitch and the first stitch are arranged at intervals.

In addition, the feed mechanism is recessed on a side close to the guide part to form a penetration space, and the penetration space is used to accommodate a part of the guide part.

In this embodiment, the feed mechanism has a needle plate, a feed tooth, an inner presser foot, and an outer presser foot, wherein the needle plate is located below the needle bar mechanism and close to the needle bar mechanism. A pin plate recess is formed on one side, and the feed tooth can move relative to the pin plate, and a feed tooth groove communicated with the pin plate groove is recessed and formed, wherein the inner pressure foot is located on the feed Above the teeth, and together with the feeding teeth can drive the hemming material and sewing fabric to move, and the inner pressure foot is recessed on the side close to the feeding teeth to form an internal pressure corresponding to the groove of the feeding teeth The foot groove enables the needle plate groove, the feeding tooth groove and the inner presser foot groove to form the above-mentioned threading space, in addition, the outer presser foot is located above the needle plate and can be clamped together with the needle plate Securing the above-mentioned hemming materials and sewing fabrics.

The invention is characterized in that the two needles are arranged in sequence along the sewing path, and the guide part of the curling device can change the moving path of the edging material, so that the edging material can be changed from the feeding path to the discharging path Move to allow the sewn fabric to pass the first needle and the second needle in sequence along the above-mentioned sewing path, and at the same time, the edging material only passes through the second needle along the above-mentioned discharge path. During the sewing operation of sewing fabrics, the hemming operation of sewing the hemming material to the edge of the sewing fabric can also be performed at the same time, which can shorten the operation time to improve the production efficiency, and when the hemming operation is completed, the stitches are wrapped The edge material is covered without being exposed, thereby preventing the stitches from being damaged due to the exposure and meeting the aesthetic requirements.

In order to facilitate a deeper and more clear and detailed understanding and understanding of the structure, use and characteristics of the present invention, the preferred embodiment is cited, and the detailed description in conjunction with the drawings is as follows:

In this manual, directional words such as "front", "rear", "left", "right", "up", "down" refer to the direction that the sewing machine operator is facing.

Please refer to FIG. 1 and FIG. 2, the double needle overlock sewing machine 1 of the present invention has a sewing machine body 10. The sewing machine body 10 is provided with a head 11, a support 12 and a base 13. The head 11, support 12 and base 13 An accommodation space 14 through which the cloth passes is formed between the three, wherein an upper shaft parallel to the X-axis direction (not shown) is assembled inside the head 11 and the upper shaft is connected to a needle bar mechanism assembled on the head 11 20. In addition, a crimper 30 located inside the accommodating space 14 is assembled outside the base 13, and a lower shaft (not shown) parallel to the upper shaft is assembled inside the base 13, and the lower shaft is driven by the upper shaft. It can rotate. Among them, a feed mechanism 40 connected to the upper shaft and the lower shaft is provided between the front head 11 and the base 13, whereby in this embodiment, the double needle overlock sewing machine 1 of the present invention is mainly composed of the sewing machine body 10. The needle bar mechanism 20, the crimper 30, and the feed mechanism 40 are formed.

Please refer to FIG. 3 and FIG. 4, the needle bar mechanism 20 has a needle clamp 21 located in the accommodating space 14. The needle clamp 21 is provided with a first needle close to the sewing machine operator at an end close to the base 13 22 and a second needle 23 remote from the sewing machine operator.

As shown in FIG. 4, the first needle 22 and the second needle 23 are sequentially spaced along a sewing path D1 parallel to the Y axis, and the first needle 22 and the second needle 23 are common The arrangement presents an oblique line arrangement that is located on the sewing path D1. In addition to the sewing machine operator, the first needle 22 is further away from the support 12 of the sewing machine body 10, and the second needle 23 is away from In addition to the sewing machine operator, it is closer to the support 12 than the first needle 22.

Please refer to FIG. 5, the crimper 30 is used for inserting a wrapping material 50 (as shown in FIG. 7A ), and is provided with a first needle 22 and a second machine at the end close to the needle bar mechanism 20 The guide portion 31 between the needles 23 can change the moving path of the edging material 50, so that the edging material 50 can pass through a feeding path D2 (parallel to the X axis) intersecting with the sewing path D1 (parallel to the X axis) As shown in FIG. 7A), it changes into a discharge path D3 (as shown in FIG. 7A) parallel to the sewing path D1 (parallel to the Y axis), and the guide portion 31 can change the movement of the edge material 50 In addition to the path, the guide 31 can also change the shape of the edging material 50. As shown in the figure, a part of the guide 31 forms an opening 311 close to the sewing machine operator, and the remaining part of the guide 31 A protrusion 312 is formed away from the operator of the sewing machine, wherein the protrusion 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.

Please refer to FIGS. 6A to 6C. In order to clearly show the structure of the feeding mechanism 40, the drawing of the sewing machine body 10, the needle bar mechanism 20 and the crimper 30 is omitted. As shown in the figure, the feeding mechanism 40 has a A feed tooth 41 that can be driven by a lower shaft (not shown) and can move, a presser foot assembly 42 mounted on the head 11, and a needle plate 43 mounted on the base 13.

As shown in the figure, a part of the feed tooth 41 is located inside the base 13 of the sewing machine body 10, and the upper part of the feed tooth 41 passes through a needle plate hole 431 formed in the needle plate 43, and the feed tooth 41 is close to the needle bar mechanism 20 A feeding tooth groove 411 inside the needle plate hole 431 is formed concavely on one side of the needle plate, wherein the presser foot assembly 42 has an inner presser foot 421 directly above the feed tooth 41 and an outer pressure directly above the needle plate 43 The foot 422 and the inner presser foot 421 are concavely formed on the side near the feed tooth 41 to form an inner presser foot groove 421a corresponding to the feed tooth groove 411, and the needle plate 43 is concavely formed to communicate with the needle plate hole 431 The needle plate groove 432 is close to the needle bar mechanism 20 and communicates with the feed tooth groove 411, so that the feed tooth groove 411, the inner presser foot groove 421a and the needle plate groove 432 are common A penetrating space 44 is formed close to the guide portion 31. As shown in FIG. 5, when the guide portion 31 of the curler 30 is located between the first needle 22 and the second needle 23, the guide portion 31 The bump 312 is located inside the penetration space 44.

Please refer to FIG. 7A, the hemming material 50 is threaded on the hemming device 30 along the feeding path D2, so that the hemming material 50 penetrates into the space between the first needle 22 and the second needle 23, so that The hemming material 50 changes its shape through the guide portion 31 to show a U-shaped shape, and changes the moving path so that the hemming material 50 extends along the discharge path D3 away from the sewing machine operator. Then, please refer to As shown in FIG. 7B, the upper shaft and the lower shaft rotate at the same time, so that the rotating upper shaft can drive the needle clamp 21 of the needle bar mechanism 20 to move along an approximately elliptical trajectory, so that the first needle 22 and The second needle 23 simultaneously reciprocates back and forth and up and down along the Y axis and Z axis, and the rotating lower axis can drive the feeding teeth 41 of the feeding mechanism 40 to move back and forth along the Y axis direction, so that the feeding teeth 41 Both the needle clamp 21 and the needle clamp 21 can 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 Z-axis as well as the external pressure of the presser foot assembly 42 The foot 422 reciprocates up and down along the Z axis. When the inner presser foot 421 is driven by the upper shaft and moves toward the feed tooth 41, the outer presser foot 422 is driven by the upper shaft and is away from the needle plate 17.

Referring to FIG. 7C, the two sewn fabrics 51 are overlapped with each other, and the two sewn fabrics 51 are moved into the accommodating space 14 of the sewing machine body 10 along the sewn path D1. In this embodiment, the two sewn fabrics The right edge of the fabric 51 is set as a stitching block 511 that can be covered by the hemming material 50. As shown in the figure, when the stitching block 511 of the two-stitched fabric 51 is close to the opening 311 of the curler 30, the internal pressure The foot 421 and the feed tooth 41 approach each other through the upper and lower shafts respectively, so that the inner presser foot 421 and the feed tooth 41 jointly clamp the edging material 50 and the two sewn fabrics 51, so that the inner presser foot 421 and the feed tooth 41 The two sewn fabrics 51 are driven together to move along the sewing path D1, and at the same time, the inner presser foot 421 and the feed tooth 41 together drive the hemming material 50 to move along the feeding path D2 first, and then pass through the guide portion 31 Moving along the discharge path D3, the two sewn fabrics 51 pass under the first needle 22 first, and then under the second needle 23, and the two sewn fabrics 51 are moved away from the sewing machine operator In the accommodating space 14, at the same time, the edging 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, in which, when the inner presser foot 421 and the feed tooth 41 drive together When the hemming material 50 and the two-sewn cloth 51 move, the guide portion 31 also reciprocates with the feed tooth 41 and the inner presser foot 421 in synchronization.

When the inner presser foot 421 and the feed tooth 41 jointly clamp the edging material 50 and the two sewn fabrics 51, the first needle 22 and the second needle 23 respectively entrain a stitch and move downward, making the first machine The needle 22 passes through the sewing block 511, and the second needle 23 passes through the edging material 50 and the sewing block 511, and then, in conjunction with the inner presser foot 421 and the feed tooth 41, simultaneously drives the edging material 50 and the two sewn fabrics 51 simultaneously moves along the discharge path D3 and the sewing path D1, so that the first needle 22 performs the sewing operation of sewing the two sewn fabrics 51 to each other, and the second needle 23 simultaneously performs the edge-sealing material 50 The sewing of the edges of the two sewn fabrics 51 is fixed to the seaming operation of the sewing block 511. In this embodiment, the hemming material 50 and the two sewn fabrics 51 are simultaneously performed along the discharge path D3 and the sewing path D1 During the movement, the first needle 22 and the second needle 23 also reciprocate along the Y axis.

When the sewing operation is completed, the surface of the sewing fabric 51 forms a first stitch L1 located in the stitching block 511, and when the wrapping operation is completed, the hemming material 50 covers the stitching block 511, so that The first stitch L1, and the surface of the hemming material 50 forms a second stitch L2 located on the right side of the first stitch L1. In this embodiment, when each stitch of sewing and hemming is completed, The first needle 22 and the second needle 23 will be away from the needle plate 43. At this time, the inner presser foot 421 will be away from the feed tooth 41 without pressing the wrapping material 50 and the sewing fabric 51, while the outer presser foot 422 will Close to the needle plate 43, the external presser foot 422 and the needle plate 43 are clamped together between the two sewn fabrics 51 and the overlying material, so as to avoid the movement of the sewn fabric 51 and the overlying material.

However, the second stitch L2 is located on the right side of the first stitch L1 for illustrative purposes only, that is, as shown in FIGS. 8A and 8B, the first needle 22 is linearly arranged back and forth on the second needle 23, so that A needle 22 and a second needle 23 are arranged to form a straight line parallel to the sewing path D1, so that the second stitch L2 overlaps the first stitch L1, or as shown in FIGS. 8C and 8D, the The first needle 22 is close to the support 12 of the sewing machine body 10, and the second needle 23 is far away from the support 12 of the sewing machine body 10, so that the first needle 22 and the second needle 23 are arranged to form an offset and inclined to the sewing path D1, so that the second stitch L2 is located on the left side of the first stitch L1.

The above-mentioned embodiments are only for the convenience of describing the present invention and are not limiting. Without departing from the spirit of the present invention, those skilled in the art who are familiar with this industry and applying the patent scope of the present invention and various simple modifications and modifications made by the invention description should still Included in the following patent applications.

1‧‧‧Double needle overlock sewing machine 10‧‧‧Sewing machine body 11‧‧‧Head 12‧‧‧Pillar 13‧‧‧‧Base 14‧‧‧Accommodation space 20‧‧‧Needle bar mechanism 21‧‧‧ Needle clamp 22‧‧‧ First needle 23‧‧‧Second needle 30‧‧‧Crimpers 31‧‧‧Guide part 311‧‧‧Opening 312‧‧‧Bump 40‧‧‧Feeding mechanism 41‧ ‧‧Feeding tooth 411‧‧‧Feeding tooth groove 42‧‧‧Presser foot assembly 421‧‧‧Inner presser foot 421a‧‧‧Inner presser foot groove 422‧‧‧External presser foot 43‧‧‧Needle plate 431‧ ‧‧Needle plate hole 432‧‧‧Needle plate groove 44‧‧‧Threading space 50‧‧‧Overlay material 51‧‧‧Sewing fabric 511‧‧‧Sewing block D1‧‧‧Sewing path D2‧ ‧‧ Feeding path D3‧‧‧ Feeding path L1‧‧‧ First stitch L2‧‧‧Second stitch

Figure 1 is a perspective view of a double-needle overlock sewing machine; Figure 2 is a schematic diagram of a needle bar mechanism, a curling device and a feeding mechanism relative to the sewing machine body; Figure 3 is a needle bar mechanism, a curling device and a feeding mechanism Schematic diagram of the arrangement relationship; FIG. 4 is a schematic diagram of the arrangement of the first needle and the second needle in a diagonal arrangement; FIG. 5 is a projection of the guide portion penetrating between the first needle and the second needle Fig. 6A is a perspective view of the feeding mechanism; Fig. 6B is a side view of the feeding mechanism; Fig. 6C is an exploded view of the feeding mechanism; Fig. 7A is a schematic view of the hemming material passing through the crimper; Fig. 7B is The schematic diagram of the operation of the needle bar mechanism and the feeding mechanism; FIG. 7C is a schematic diagram of the sewing and fixing of the hemming material on the fabric with two stitches; FIG. 7D is a schematic diagram of the covering material covering the first stitch; FIG. 8A is the first needle A schematic view of a vertical arrangement on the second needle; FIG. 8B is a schematic view of the second stitch overlapping the first stitch; FIG. 8C is a schematic view of the first needle being arranged offset on the second needle; and FIG. 8D is a first A schematic diagram of stitches arranged at intervals on the second stitch.

20‧‧‧Needle bar mechanism

21‧‧‧ Needle clamp

22‧‧‧ First machine needle

23‧‧‧Second machine needle

30‧‧‧Crimpers

31‧‧‧Guiding Department

311‧‧‧ opening

312‧‧‧Bump

40‧‧‧Feeding mechanism

41‧‧‧Feeding tooth

42‧‧‧Presser foot assembly

421‧‧‧Internal presser foot

422‧‧‧External presser foot

43‧‧‧ Needle plate

431‧‧‧Pin board hole

Claims (5)

A double-needle hemming sewing machine can sew a hemming material to a sewn fabric along a sewing path. The above-mentioned double-needle hemming sewing machine includes: a needle bar mechanism with a first needle and a first Two needles, the first needle and the second needle are sequentially spaced along the sewing path; an edge curler has a guide portion between the first needle and the second needle, The guide part can change the edge material from a feeding path intersecting the sewing path to a discharging path parallel to the sewing path, so that the edge material covers the sewing fabric; And a feeding mechanism, which can drive the sewn fabric to pass the first needle and the second needle in sequence along the sewn path, and simultaneously drive the wrapping material to move through the second path along the discharge path Machine needle; wherein, the first machine needle sews the sewn fabric to form a first stitch, and the second needle sews the edging material and the sewn fabric to form a second stitch, and The second stitch is exposed on the surface of the encapsulating material, and the first stitch is covered by the encapsulating material. The double-needle hemming sewing machine as described in item 1 of the scope of the patent application, wherein both the first needle and the second needle present a straight line parallel to the sewing path, so that the second stitch overlaps The first stitch above. The double-needle overlock sewing machine as described in item 1 of the patent application scope, wherein the first needle and the second needle are arranged in an oblique line located on the sewing path, so that the second stitch and the above The first stitches are arranged at intervals. The double-needle hemming sewing machine as described in item 1 of the patent application scope, wherein the feed mechanism is recessed on a side near the guide portion to form a penetration space for accommodating the guide portion a part of. The double-needle hemming sewing machine as described in item 4 of the patent application scope, wherein the feed mechanism includes: a needle plate located below the needle bar mechanism, and a needle plate is recessed on the side close to the needle bar mechanism Groove; a feeding tooth, which can move relative to the needle plate, and recessed to form a feeding tooth groove communicating with the needle plate groove; an internal presser foot, located above the feeding tooth, and capable of The feeding teeth together drive the hemming material and the sewing fabric to move, and the inner presser foot is recessed on the side close to the feeding tooth to form an inner presser foot groove corresponding to the feed tooth groove, so that the needle plate The groove, the feed tooth groove and the inner presser foot groove together form the above-mentioned passing space; and an outer presser foot is located above the needle plate and can clamp the edging material and the sewing seam together with the needle plate Cloth.

Images