CN109371584B

CN109371584B - Sewing thread feeding device

Info

Publication number: CN109371584B
Application number: CN201811565314.0A
Authority: CN
Inventors: 马瑞
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-12-20
Filing date: 2018-12-20
Publication date: 2023-08-22
Anticipated expiration: 2038-12-20
Also published as: WO2020125034A1; CN109371584A

Abstract

The embodiment of the invention relates to the technical field of fabric processing, in particular to a sewing thread feeding device, which comprises an upper thread needle, an upper thread positioning mechanism and a lower thread poking needle, wherein the lower thread poking needle is provided with a lower thread hole for penetrating a lower thread, the upper thread needle is arranged in a lifting manner, the lower end of the upper thread needle passes through the upper thread positioning mechanism after descending, the lower thread poking needle is arranged on the upper side of the upper thread positioning mechanism, and the lower thread poking needle is connected with a poking needle driving mechanism for driving the lower thread poking needle to swing around the axis where the upper thread needle is located. The bottom thread poking needle is utilized to drive the bottom thread to swing around the axis of the upper thread needle, the upper thread positioning mechanism is utilized to position the upper thread after the upper thread needle falls, the bottom thread poking needle is utilized to poke the upper thread, the bottom thread and the upper thread are wound and looped, the bottom thread shuttle core is replaced, the bottom thread only needs to be arranged on the bottom thread hole of the bottom thread poking needle in a penetrating mode, the thread feeding time of the bottom thread can be greatly improved, theoretically, the bottom thread can be fed infinitely, the size of the shuttle core is not limited any more, and the working efficiency is improved.

Description

Sewing thread feeding device

Technical Field

The invention relates to the technical field of fabric processing, in particular to a sewing thread feeding device.

Background

Sewing machine, embroidery machine are the necessary equipment that is used for processing clothes surface fabric, bedding and various (window) curtain cloth art, these equipment all need the upper thread to accomplish jointly with the bobbin thread and make, and the upper thread just is the line above the cloth, and the upper thread is worn to establish on the hole of syringe needle lower extreme, and the bobbin thread just is the line of placing below the cloth, all carry the bobbin thread through the shuttle cock stem in the past, and the shuttle cock stem still is equipped with the shuttle cock hook that is used for catching the upper thread simultaneously, and rotatory in-process shuttle cock hook catches the upper thread and makes upper thread and bobbin thread twine on the surface fabric form the chain.

The shuttle core is provided with the functions of conveying the bottom thread and hooking the upper thread, so that the volume of the shuttle core is greatly limited, a single spool needs to be prepared in the shuttle core, too many bottom threads cannot be wound on the spool, 100-200 shuttle cores need to be configured in a large-scale sewing machine, when the bottom threads are used up, the new shuttle cores need to be replaced every forty-five minutes on average, the shuttle core needs to be replaced, time and labor are wasted, the working efficiency is low, the phenomenon that the bottom threads are blocked easily occurs, and a large amount of bottom threads are wasted.

Disclosure of Invention

The embodiment of the invention aims to provide a sewing thread feeding device which is used for solving the problems of time and labor consumption, low working efficiency and waste of bottom threads in the existing shuttle peg replacement process, thoroughly replacing the shuttle peg and improving the production efficiency.

In order to achieve the above purpose, the sewing thread feeding device comprises an upper thread needle, an upper thread positioning mechanism and a bottom thread poking needle, wherein an upper thread hole for penetrating an upper thread is formed in the lower portion of the upper thread needle, a bottom thread hole for penetrating a bottom thread is formed in the bottom thread poking needle, the upper thread needle is arranged in a lifting mode, the lower end of the upper thread needle penetrates through the upper thread positioning mechanism after descending, the bottom thread poking needle is arranged on the upper side of the upper thread positioning mechanism, and the bottom thread poking needle is connected with a poking needle driving mechanism for driving the bottom thread poking needle to swing around the axis of the upper thread needle.

The sewing thread feeding device further comprises a bottom thread tensioning mechanism, the bottom thread passes through the bottom thread hole after passing through the bottom thread tensioning mechanism, and the bottom thread tensioning mechanism keeps the bottom thread between the bottom thread tensioning mechanism and the upper thread in a tensioning state.

The bottom line tensioning mechanism comprises a bottom line traction guide mechanism and a tensioning cam, the tensioning cam is rotatably arranged on one side of the bottom line traction guide mechanism, and the bottom line passes through the bottom line hole after passing through the bottom line traction guide mechanism.

The bottom line traction guide mechanism comprises two guide plates and a pressing plate, the pressing plate is arranged between the two guide plates, threading holes are formed in the guide plates, the tensioning cams are groove wheels, and the bottom line between the two guide plates is pressed into the wheel grooves of the tensioning cams by the pressing plate.

And the side wall of the wheel groove of the tensioning cam is provided with an air flow hole.

One end of the compression sheet is connected with a torsion spring which drives the compression sheet to rotate, and the other end of the compression sheet is fixed through a spring piece.

The needle pulling driving mechanism comprises a driving main shaft, a middle driving shaft sleeve and an eccentric swinging shaft, the eccentric swinging shaft is connected with the power mechanism through a rotating shaft, the axis of the eccentric swinging shaft is crossed with the axis of the rotating shaft, the eccentric swinging shaft is rotationally connected to the inner side of the middle driving shaft sleeve, the outer side of the middle driving shaft sleeve is fixedly provided with a radial shaft which is radially arranged on the middle driving shaft sleeve, the radial shaft is in sliding connection with one end of the driving main shaft, the axis of the radial shaft is perpendicular to the axis of the driving main shaft, and the bobbin thread needle pulling is fixed at the other end of the driving main shaft.

The facial line positioning mechanism comprises a fixed rod which is fixedly arranged and a positioning rod which is movably arranged, and the positioning rod is connected with the driving main shaft through a transverse reciprocating movement mechanism.

The transverse reciprocating mechanism comprises a stirring block and a stirring vertical rod, the stirring block is fixed on the driving spindle, the lower end of the stirring vertical rod is arranged on one side of the stirring block, the upper end of the stirring vertical rod is connected with a transversely arranged positioning rod, and the positioning rod is connected with a reset spring.

The sewing thread feeding device further comprises a cutting mechanism, the cutting mechanism comprises a fixed cutter and a movable cutter, the fixed cutter is fixedly arranged, and the movable cutter is connected with a swinging rod for driving the movable cutter to swing horizontally.

The embodiment of the invention has the following advantages:

according to the embodiment of the invention, the bottom thread poking needle is utilized to drive the bottom thread to swing around the axis of the upper thread needle, the upper thread positioning mechanism is utilized to position the upper thread after the upper thread needle falls, the bottom thread poking needle is utilized to poke the upper thread, so that the bottom thread and the upper thread are wound and looped, the bottom thread shuttle core is replaced, the bottom thread only needs to be arranged on the bottom thread hole of the bottom thread poking needle in a penetrating way, the thread feeding time of the bottom thread can be greatly improved, the bottom thread can be theoretically fed infinitely, the size of the shuttle core is not limited, and the working efficiency is improved.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.

Fig. 2 is a schematic view of embodiment 1 of the present invention after concealing the sewing panel.

Fig. 3 is a schematic view of a hidden sewing panel and a case cover plate according to embodiment 1 of the present invention.

Fig. 4 is a schematic view of a setting driving mechanism according to embodiment 1 of the present invention.

Fig. 5 is an exploded view of the setting needle driving mechanism of embodiment 1 of the present invention.

Fig. 6 is a schematic diagram of a bobbin thread tensioning mechanism according to embodiment 1 of the present invention.

Fig. 7 is a schematic diagram of a wire feeding method step one according to embodiment 1 of the present invention.

Fig. 8 is a schematic diagram of a second step of the wire feeding method in embodiment 1 of the present invention.

Fig. 9 is a left side view of the upper needle and the lower needle of fig. 8.

Fig. 10 is a schematic diagram of a wire feeding method step three according to embodiment 1 of the present invention.

Fig. 11 is a schematic diagram of a fourth wire feeding method in embodiment 1 of the present invention.

Fig. 12 is a schematic diagram of a wire feeding method step five according to embodiment 1 of the present invention.

In the figure: the needle thread tension device comprises a transmission case 2-gear 3-upper thread plate 4-upper thread needle 5-lower thread tension mechanism 6-lower thread poking needle 7-fixed knife 8-movable knife 9-fixed rod 10-positioning rod 11-lead sheet 12-driving main shaft 13-driving block 14-intermediate driving shaft sleeve 15-swinging shaft sleeve 16-poking block 17-poking vertical rod 18-reset spring 19-rotating shaft 20-eccentric swinging shaft 21-radial shaft 22-guide piece 23-compressing piece 24-threading hole 25-tension cam 26-air flow hole 27-spring piece 28-pulling ring 29-spring piece 30-clamping groove 31-first lower thread V-shaped space included angle 32-upper thread V-shaped space included angle 33-second lower thread V-shaped space included angle.

Detailed Description

Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present invention, which is described by the following specific examples.

It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the invention to the extent that it can be practiced, since modifications, changes in the proportions, or otherwise, used in the practice of the invention, are not intended to be critical to the essential characteristics of the invention, but are intended to fall within the spirit and scope of the invention. Also, the terms "upper", "lower", "left", "right", "inner", "outer", "middle", and the like are used herein for descriptive purposes only and are not intended to limit the scope of the invention for which the invention may be practiced or for which the relative relationships may be altered or modified without materially altering the technical context.

Example 1

Referring to fig. 1 to 3, the sewing thread feeding device comprises a transmission case 1, a thread plate 3, a thread needle 4, a thread positioning mechanism, a bottom thread poking needle 6 and a bottom thread tensioning mechanism 5, wherein the thread plate 3 is arranged on the upper side of the transmission case 1, a thread hole for penetrating a thread is formed in the lower portion of the thread needle 4, a bottom thread hole for penetrating the bottom thread is formed in the bottom thread poking needle 6, the thread needle 4 is arranged in a lifting mode and penetrates through the hole in the thread plate 3, the lower end of the descending lower end of the thread needle 4 penetrates through the thread positioning mechanism, the bottom thread poking needle 6 is arranged on the upper side of the thread positioning mechanism, the bottom thread poking needle 6 is connected with a poking needle driving mechanism for driving the needle to swing around the axis of the thread needle 4, the poking needle driving mechanism is arranged in the transmission case 1, a gear 2 connected with the poking needle driving mechanism is arranged on one side of the transmission case 1, and the gear 2 is connected with a motor. The bottom thread passes through the bottom thread hole after passing through the bottom thread tensioning mechanism 5, and the bottom thread tensioning mechanism 5 keeps the bottom thread between the bottom thread tensioning mechanism 5 and the upper thread in a tensioning state.

The sewing thread feeding device also comprises a cutting mechanism, and the thread is cut off after sewing or embroidering a flower, so that the degree of automation is further improved. The cutting mechanism of the embodiment comprises a fixed cutter 7 and a movable cutter 8, wherein the fixed cutter 7 is fixedly arranged on the lower side of the upper thread plate 3, the movable cutter 8 is arranged on the lower side or the upper side of the fixed cutter 7 in a swinging way, and the movable cutter 8 is connected with a swinging rod for driving the movable cutter 8 to swing horizontally.

Referring to fig. 4 to 5, the setting needle driving mechanism includes a driving spindle 12, an intermediate driving shaft sleeve 14 and an eccentric oscillating shaft 20, the eccentric oscillating shaft 20 is connected with the gear 2 through a rotating shaft 19, the axis of the eccentric oscillating shaft 20 is crossed with the axis of the rotating shaft 19, the eccentric oscillating shaft 20 is rotatably connected inside the intermediate driving shaft sleeve 14, a radial shaft 21 is fixed outside the intermediate driving shaft sleeve 14 and radially arranged on the radial shaft 14, the radial shaft 21 is slidably connected with one end of the driving spindle 12, the axis of the radial shaft 21 is perpendicular to the axis of the driving spindle 12, and the bottom wire setting needle 6 is fixed at the other end of the driving spindle 12. The rotary shaft 19 of this embodiment is fixedly connected with a swinging shaft sleeve 15, one end surface of the swinging shaft sleeve 15 is a wedge surface, and the eccentric swinging shaft 20 is vertically fixed on the wedge surface. The swinging shaft sleeve 15 is driven to rotate in the rotating process of the rotating shaft 19, the eccentric swinging shaft 20 rotates eccentrically, the middle driving shaft sleeve 14 is driven to synchronously and eccentrically swing in the rotating process of the eccentric swinging shaft 20, the radial shaft 21 of the middle driving shaft sleeve 14 is in sliding connection with the driving block 13 at the end part of the driving main shaft 12, the middle driving shaft sleeve 14 drives the driving main shaft 12 to axially move and simultaneously rotate, and finally the bottom thread poking needle 6 is driven to do irregular circular swinging around the axis of the upper thread needle 4, so that poking of the upper thread is realized, all parts are tightly matched, a plurality of power mechanisms are not needed to obtain, and the structure is simple.

The facial line positioning mechanism comprises a fixed rod 9 which is fixedly arranged and a positioning rod 10 which is movably arranged, and the positioning rod 10 is connected with a driving main shaft 12 through a transverse reciprocating movement mechanism. The transverse reciprocating mechanism comprises a poking block 16 and a poking vertical rod 17, the poking block 16 is fixed on the driving main shaft 12, the lower end of the poking vertical rod 17 is arranged on one side of the poking block 16, the upper end of the poking vertical rod is connected with a transversely arranged positioning rod 10, and the positioning rod 10 is connected with a reset spring 18.

Referring to fig. 6, the bobbin thread tension mechanism 5 includes a bobbin thread traction guide mechanism and a tension cam 25, the tension cam 25 is rotatably disposed at one side of the bobbin thread traction guide mechanism, and the bobbin thread passes through the bobbin thread hole after passing through the bobbin thread traction guide mechanism. The bottom line traction guide mechanism comprises two guide plates 22 and a pressing plate 23, the pressing plate 23 is arranged between the two guide plates 22, threading holes 24 are formed in the guide plates 22, the tightening cams 25 are groove wheels, the pressing plate 23 presses the bottom line between the two guide plates 22 into the wheel grooves of the tightening cams 25, the bottom line is pushed back and forth through rotation of the tightening cams 25, and accordingly the bottom line pulling needle 6 is matched with the action of the bottom line pulling needle 6, when the bottom line pulling needle 6 swings to the side far from the tightening cams 25, the tightening cams 25 rotate to the direction far from the pressing plate 23, the bottom line is properly loosened, and when the bottom line pulling needle 6 swings to the side close to the tightening cams 25, the tightening cams 25 are pulled up, so that the bottom line is tightened, and the bottom line is kept to have constant tension all the time.

One end of the compressing sheet 23 is connected with a torsion spring for driving the compressing sheet to rotate, the other end of the compressing sheet is fixed through a spring sheet 27, the spring sheet 27 is vertically fixed on a supporting plate, the supporting plate is fixedly connected with the transmission case 1, a tensioning motor is fixed on one side of the supporting plate, the compressing sheet 23, the guide sheet 22 and the tensioning cam 25 are fixed on the other side of the supporting plate, an output shaft of the tensioning motor is connected with the tensioning cam 25, the upper end of the spring sheet 27 is provided with a downward bent elastic sheet 29, a clamping groove 30 for fixing the compressing sheet 23 is formed in the lower side of the elastic sheet 29, a pull ring 28 is arranged on the supporting plate, the pull ring 28 is arranged on the outer side of the spring sheet 27, the spring sheet 27 is pressed inwards by the pull ring 28, the spring sheet 27 is reliably fixed on the compressing sheet 23, when a wire is required to be replaced, the spring sheet 27 is pulled outwards, the compressing sheet 23 swings upwards under the driving of the torsion spring, a new bottom wire is passed through a threading hole 24 of the guide sheet 22, and the wire replacement is convenient.

Further, in this embodiment, the air flow holes 26 are formed on the sidewall of the wheel groove of the tension cam 25, and in the process of rotating the tension cam 25, the air flow holes 26 form a certain air flow, so that the hair attached to the bottom line can be blown down, and the processing quality is higher.

The wire feeding method of the invention comprises the following steps:

step one, referring to fig. 7, the broken line is a bottom line, the solid line passing through the upper needle 4 is an upper line, the upper needle 4 is at the highest point, and the bottom line poking needle 6 is positioned at the leftmost end and in front of the lower part of the upper needle 4; the upper thread passes the upper thread hole of upper thread needle 4, and the upper thread behind upper thread needle 4 receives the tensioning force of cloth on the upper thread board 3, and the bobbin thread passes the bobbin thread hole on the bobbin thread dialling needle 6 from the right to the left, and the bobbin thread on the left of bobbin thread dialling needle 6 receives the tensioning force of cloth on upper thread board 3, and at this moment, left bobbin thread and bobbin thread dialling needle 6 form a first bobbin thread V type space contained angle 31 that is located upper thread needle 4 left side below.

Step two, referring to fig. 8 to 9, when the needle 4 moves down with the upper thread, the needle 6 swings right with the lower thread, and the needle 4 pulls the needle 4 down to pass through the lower thread and the V-shaped space included angle 32 formed by the needle 6. When the upper thread needle 4 reaches the lower end limit position, the lower thread pulling needle 6 reaches the right end limit position at the same time. At this time, referring to fig. 9, the upper thread needle 4 forms a V-shaped space angle with the upper thread on the left side thereof, the knife tip of the bottom thread poking needle 6 is positioned on the right side of the upper thread needle 4, and the left bottom thread is positioned in front of the upper thread needle 4 and the front upper thread thereof.

Step three, referring to fig. 10, when the bottom thread pulling needle 6 pulls the bottom thread to move to the rear of the upper thread needle 4, the driving shaft drives the positioning rod 10 to move at the same time, and the positioning rod 10 cooperates with the fixing rod 9 to clamp the upper thread or block one side of the upper thread. At this time, the tip of the bottom thread pulling needle 6 pulls the bottom thread to wind the upper thread needle 4 from front to back and the upper thread at the front side of the upper thread needle 4, and the tip of the bottom thread pulling needle 6 passes through the upper thread V-shaped space included angle 32 formed by the upper thread and the upper thread needle 4 behind the upper thread needle 4 in the figure.

Step four, referring to fig. 11, when the knife tip of the bottom thread poking needle 6 enters into the upper thread V-shaped space included angle 32 formed by the rear upper thread and the upper thread needle 4 behind the upper thread needle 4, the upper thread needle 4 moves upwards, and the upper thread is wound below the bottom thread poking needle 6 and does not move upwards along with the upper thread needle 4. When the bottom thread pulling needle 6 moves to the left limit position, the left bottom thread and the bottom thread pulling needle 6 form a second bottom thread V-shaped space included angle 33 positioned at the left lower part of the upper thread needle 4, and the upper thread needle 4 reaches the highest point.

Step five, referring to fig. 12, the fabric moves a certain distance, the bottom thread pulling needle 6 moves to the right, meanwhile, the upper thread needle 4 moves a certain distance relative to the fabric on the upper side of the fabric and passes through the fabric downwards again, the upper thread needle 4 is inserted into the second bottom thread V-shaped space included angle 33 before the upper thread on the bottom thread pulling needle 6 breaks away from the bottom thread pulling needle 6, when the bottom thread pulling needle 6 swings to the right limit position, the upper thread on the bottom thread pulling needle 6 breaks away from the bottom thread pulling needle 6, but because the upper thread needle 4 which falls down again at this time drives the upper thread to be inserted into the second bottom thread V-shaped space included angle 33, the upper thread which falls off from the bottom thread pulling needle 6 winds into a ring with the bottom thread at the second bottom thread V-shaped space included angle 33, and thus the winding of the upper thread and the bottom thread is completed reciprocally to form a lock chain.

While the invention has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.

Claims

1. A sewing thread feeding device, characterized in that: the sewing thread feeding device comprises an upper thread needle (4), an upper thread positioning mechanism and a lower thread poking needle (6), wherein an upper thread hole for penetrating an upper thread is formed in the lower portion of the upper thread needle (4), a lower thread hole for penetrating a lower thread is formed in the lower thread poking needle (6), the upper thread needle (4) is arranged in a lifting mode, the lower end of the upper thread needle (4) penetrates through the upper thread positioning mechanism after descending, the lower thread poking needle (6) is arranged on the upper side of the upper thread positioning mechanism, and the lower thread poking needle (6) is connected with a poking needle driving mechanism for driving the lower thread poking needle to swing around the axis where the upper thread needle (4) is located;

the needle shifting driving mechanism comprises a driving main shaft (12), an intermediate driving shaft sleeve (14) and an eccentric swinging shaft (20), wherein the eccentric swinging shaft (20) is connected with a power mechanism through a rotating shaft (19), the axis of the eccentric swinging shaft (20) is crossed with the axis of the rotating shaft (19), the eccentric swinging shaft (20) is rotationally connected with the inner side of the intermediate driving shaft sleeve (14), the outer side of the intermediate driving shaft sleeve (14) is fixedly provided with a radial shaft (21) along the radial direction of the intermediate driving shaft sleeve, the radial shaft (21) is in sliding connection with one end of the driving main shaft (12), the axis of the radial shaft (21) is perpendicular to the axis of the driving main shaft (12), and the bottom line needle shifting (6) is fixed at the other end of the driving main shaft (12).

2. The sewing thread feeding device of claim 1, wherein: the sewing thread feeding device further comprises a bottom thread tensioning mechanism (5), the bottom thread passes through the bottom thread hole after passing through the bottom thread tensioning mechanism (5), and the bottom thread tensioning mechanism (5) keeps the bottom thread between the bottom thread tensioning mechanism (5) and the upper thread in a tensioning state.

3. The sewing thread feeding device of claim 2, wherein: the bottom line tensioning mechanism (5) comprises a bottom line traction guide mechanism and a tensioning cam (25), the tensioning cam (25) is rotatably arranged on one side of the bottom line traction guide mechanism, and the bottom line passes through the bottom line hole after passing through the bottom line traction guide mechanism.

4. A sewing thread feeding device as claimed in claim 3, wherein: the bottom line traction guide mechanism comprises two guide plates (22) and a pressing plate (23), the pressing plate (23) is arranged between the two guide plates (22), threading holes (24) are formed in the guide plates (22), the tensioning cams (25) are groove-shaped wheels, and the pressing plate (23) presses the bottom line between the two guide plates (22) into the wheel grooves of the tensioning cams (25).

5. The sewing thread feeding device of claim 4, wherein: and the side wall of the wheel groove of the tensioning cam (25) is provided with an air flow hole (26).

6. The sewing thread feeding device of claim 4, wherein: one end of the pressing piece (23) is connected with a torsion spring for driving the pressing piece to rotate, and the other end of the pressing piece is fixed through a spring piece (27).

7. The sewing thread feeding device of claim 1, wherein: the facial line positioning mechanism comprises a fixed rod (9) and a movable positioning rod (10), wherein the fixed rod (9) and the movable positioning rod (10) are fixedly arranged, and the positioning rod (10) is connected with a driving main shaft (12) through a transverse reciprocating movement mechanism.

8. The sewing thread feeding device of claim 7, wherein: the transverse reciprocating mechanism comprises a stirring block (16) and a stirring vertical rod (17), the stirring block (16) is fixed on the driving main shaft (12), the lower end of the stirring vertical rod (17) is arranged on one side of the stirring block (16), the upper end of the stirring vertical rod is connected with a transversely arranged positioning rod (10), and the positioning rod (10) is connected with a reset spring (18).

9. The sewing thread feeding device of claim 1, wherein: the sewing thread feeding device further comprises a cutting mechanism, the cutting mechanism comprises a fixed cutter (7) and a movable cutter (8), the fixed cutter (7) is fixedly arranged, and the movable cutter (8) is connected with a swinging rod for driving the movable cutter to swing horizontally.