CN210287755U

CN210287755U - Sewing machine and thread releasing device thereof

Info

Publication number: CN210287755U
Application number: CN201920986861.XU
Authority: CN
Inventors: 陈英杰; 颜文耀
Original assignee: Zhejiang Maqi Sewing Machine Co Ltd
Current assignee: Meiji Technology Group Co ltd
Priority date: 2019-06-27
Filing date: 2019-06-27
Publication date: 2020-04-10
Anticipated expiration: 2029-06-27

Abstract

The utility model belongs to the technical field of make up machinery, a sewing machine and thread take-up device thereof is related to, its thread take-up device who has solved current sewing machine assembles difficult scheduling problem. This thread slackening device includes thread trapper, pine line lever, driving source and pine line board, and this pine line lever includes fulcrum, power arm and resistance arm, and the length of power arm is greater than the length of resistance arm, and the output of this driving source is connected with the power arm of pine line lever, and can drive the pine line lever around the fulcrum swing, and this pine line board is connected with the resistance arm of pine line lever, and the pine line lever can drive the pine line board towards the thread trapper removal and realize the pine line through the swing of self. The utility model has the advantages of the assembly degree of difficulty is low, assembly efficiency is high.

Description

Sewing machine and thread releasing device thereof

Technical Field

The utility model belongs to the technical field of make up machinery, a sewing machine and thread slackening device thereof is related to.

Background

In a bag sewing machine, a thread slacking device is an indelible unit because when a thread is required to cut at the beginning and end of a bag sewing operation, it is generally required to put the sewing machine cover thread in a slackened state, and the time and state of the slackening process affect not only the cutting quality but also the labor intensity of an operator.

Therefore, many manufacturers research the thread releasing device of the overedger, for example, the thread releasing mechanism of the overedger disclosed in the chinese patent CN 205295676U comprises a thread passing plate, a thread pressing disc is arranged on one side surface of the thread passing plate, a support is arranged on the other side of the thread passing plate, a thread releasing cylinder is fixedly connected on the support, a piston rod of the thread releasing cylinder is fixedly connected with a movable frame, and the movable frame can be clamped between the thread passing plate and the thread pressing disc under the driving of the thread releasing cylinder. When the thread needs to be loosened, the thread loosening cylinder is controlled to drive the movable frame, so that the movable frame is clamped between the thread passing plate and the thread pressing disc, the upper thread is in a loose state, and the thread loosening is finished.

Although the thread releasing mechanism can release threads, the thread releasing mechanism still has the following defects:

when the thread is loosened, the thread loosening cylinder directly drives the movable frame to move along the horizontal direction to achieve thread loosening, the thread loosening cylinder needs to output large force to achieve thread loosening during working, therefore, the thread loosening cylinder has larger requirements on the diameter and the whole volume of the thread loosening cylinder, the cost is high, and in addition, the assembly difficulty brought by the large-diameter cylinder is doubled and improved for the overedger with extremely compact assembly space.

SUMMERY OF THE UTILITY MODEL

The utility model aims at having the above-mentioned problem to current technique, provided a sewing machine and thread slacking device thereof, the utility model aims to solve the technical problem that: how to improve the assembly convenience through reducing the assembly degree of difficulty of this pine line device.

The purpose of the utility model can be realized by the following technical proposal:

a thread slackening device of a sewing machine, characterized in that the thread slackening device comprises:

a wire clamping device;

the thread releasing lever comprises a fulcrum, a power arm and a resistance arm, and the length of the power arm is greater than that of the resistance arm;

the output end of the driving source is connected with the power arm of the thread releasing lever and can drive the thread releasing lever to swing around the fulcrum;

the thread loosening plate is connected with the resistance arm of the thread loosening lever;

the thread loosening lever can drive the thread loosening plate to move towards the thread clamping device through swinging of the thread loosening lever, so that thread loosening is achieved.

The working principle is as follows: when the thread needs to be loosened, the thread loosening lever is driven to swing through the driving source, so that the thread loosening plate is driven to move, the thread loosening plate moves towards the thread clamping device, and the thread loosening is achieved. Because the power arm length of the thread loosening lever is greater than the length of the resistance arm, compared with the prior art, the thread loosening can be realized only by outputting less force by the driving source, so that the energy consumption is reduced, the volume of the driving source can be reduced, the assembly space is saved, the assembly difficulty is reduced, and the assembly convenience is improved.

In the thread releasing device of the sewing machine, the thread releasing device comprises a thread releasing mounting plate, the thread releasing plate is movably matched with the thread releasing mounting plate, and the thread releasing can be realized by sliding towards the thread clamping device; the thread loosening device further comprises a resetting mechanism which can enable the thread loosening plate to slide in the direction away from the thread clamping device. When the thread needs to be loosened, the driving source drives the thread loosening plate to move towards the thread clamping device through the thread loosening lever, so that the thread loosening is realized; after the thread is loosened, the thread loosening plate can slide towards the direction far away from the thread clamping device under the action of the resetting mechanism, and resetting is realized.

In the thread releasing device of the sewing machine, the reset mechanism comprises a reset spring, one end of the reset spring is fixed on the thread releasing mounting plate, and the other end of the reset spring is connected with the thread releasing lever. When the thread needs to be loosened, the driving source can drive the thread loosening lever to overcome the elastic force of the reset spring to drive the thread loosening plate to move; when the thread is loosened, the thread loosening plate can be reset under the action of the reset spring.

In the thread releasing device of the sewing machine, the thread releasing mounting plate is provided with a limit screw, and the thread releasing plate is provided with a sliding groove in sliding fit with the limit screw. After the design has spout and stop screw, can carry out spacingly to the moving direction of pine line board, avoid it to take place the leap up of left and right direction and move, improve its stability and accurate nature when sliding.

In the thread releasing device of the sewing machine, the limiting screw is provided with a limiting groove matched with the sliding groove. The cooperation of spacing groove and spout still can carry out the spacing of fore-and-aft direction to the pine line board, avoids it to take place to leap up along the fore-and-aft direction, stability and accurate nature when further improving the pine line board and removing to improve pine line stability.

In the thread releasing device of the sewing machine, a first strip-shaped hole is formed in the power arm of the thread releasing lever along the length direction of the power arm, and a first connecting piece movably matched with the first strip-shaped hole is arranged at the output end of the driving source; a second strip-shaped hole is formed in the resistance arm of the thread loosening lever along the length direction of the resistance arm, and a second connecting piece movably matched with the second strip-shaped hole is arranged on the thread loosening plate. When the thread loosening lever swings, the lengths of the power arm and the resistance arm are changed, and the first strip-shaped hole, the first connecting piece, the second strip-shaped hole and the second connecting piece are designed, so that when the thread loosening lever swings, the first connecting piece and the second connecting piece can slide in the first strip-shaped hole and the second strip-shaped hole, and clamping stagnation is avoided by matching with the action of the thread loosening lever.

In the thread releasing device of the sewing machine, the thread releasing device further comprises a driving source mounting plate arranged on the thread releasing mounting plate, the driving source is fixed on the driving source mounting plate, and the fulcrum of the thread releasing lever is arranged on the driving source mounting plate. With each part integration such as driving source, driving source mounting panel, pine line board, tension disk on the pine line mounting panel, can integrate into an subassembly, convenient equipment is maintained.

In the thread releasing device of the sewing machine, the thread releasing plate is provided with a thread releasing claw which can push open a thread clamping piece on the thread clamping device. The thread loosening plate moves to enable the thread loosening claw to move between the two thread clamping sheets to jack the two thread clamping sheets apart, and therefore thread loosening is achieved.

The sewing machine is characterized by comprising the thread releasing device.

Compared with the prior art, the utility model has the advantages of it is following:

1. the driving source in the application can realize the thread loosening only by outputting less force, thereby reducing the energy consumption, reducing the volume of the driving source and saving the assembly space, thereby reducing the assembly difficulty and improving the assembly convenience;

2. with each part integration such as driving source, driving source mounting panel, pine line board, tension disk in this application on the pine line mounting panel, can integrate into an subassembly, convenient equipment is maintained.

Drawings

Fig. 1 is a schematic front view of the thread releasing device in the embodiment.

Fig. 2 is a schematic reverse structure of the thread releasing device in the embodiment.

Fig. 3 is a schematic structural diagram of the loose wire mounting plate in the embodiment.

Fig. 4 is a schematic structural diagram of the loosening plate in the embodiment.

In the figure, 1, a wire clamper; 2. a thread releasing lever; 3. a fulcrum; 4. a power arm; 5. a resistance arm; 6. a drive source; 7. loosening the thread plate; 8. a loose wire mounting plate; 9. a reset mechanism; 10. a reset spring; 11. a limit screw; 12. a chute; 13. a first strip-shaped hole; 14. a first connecting piece; 15. a strip-shaped hole II; 16. a second connecting piece; 17. a drive source mounting plate; 18. a thread releasing claw; 19. a first mounting hole; 20. a first fastener; 21. a nut; 22. a strip-shaped hole III; 23. a second mounting hole; 24. and a second nut.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, 2 and 3, the thread releasing device comprises a thread clamping device 1 and a thread releasing mounting plate 8, wherein the thread clamping device 1 is arranged on the thread releasing mounting plate 8. Preferably, the thread releasing mounting plate 8 is provided with a mounting hole I19, the thread clamping device 1 penetrates through the mounting hole I19 through a fastener I20, the thread clamping device 1 and the thread releasing mounting plate 8 are fixed on a machine head together, and the thread clamping device 1 is provided with a thread clamping sheet capable of clamping a suture.

As shown in fig. 1 and 2, the thread releasing device further comprises a thread releasing plate 7, and a thread releasing claw 18 capable of pushing open a thread clamping piece on the thread clamping device 1 is arranged on the thread releasing plate 7.

Preferably, the thread releasing plate 7 is movably matched with the thread releasing mounting plate 8, and the thread releasing can be realized by sliding towards the direction of the thread clamping device 1. Specifically, the thread releasing mounting plate 8 is provided with a limit screw 11, the thread releasing plate 7 is provided with a sliding groove 12 in sliding fit with the limit screw 11, and the limit screw 11 is provided with a limit groove in fit with the sliding groove 12. Thereby avoiding bouncing out of the predetermined trajectory of the limp board 7.

Preferably, the number of the limiting screws 11 is two, and the limiting screws are positioned between the two wire clamps 1, and the rear planes of the limiting grooves are aligned with the contact planes of the two wire clamps 1, so that the wire loosening of the two wire clamps 1 is more synchronous.

Although the thread loosening plate 7 disclosed in the drawings of the specification slides in a linear direction to loosen the thread. But not limited to the line loosening plate 7 only moving along the direction, it can move along different angles and tracks according to actual needs, as long as it can finally reach the line clamping device 1 to push the line clamping sheet open to realize line loosening.

As shown in fig. 1 and 2, the thread releasing device further includes a driving source 6 and a thread releasing lever 2. Preferably, the thread releasing device further comprises a driving source mounting plate 17 arranged on the thread releasing mounting plate 8, and the driving source 6 is fixed on the driving source mounting plate 17, and the specific fixing mode can be realized by adopting a fastening piece, welding and the like. The fulcrum 3 of the thread releasing lever 2 is provided on the drive source mounting plate 17. The output of driving source 6 is connected with power arm 4 of pine line lever 2, and resistance arm 5 of pine line lever 2 is connected with pine line board 7, and the length of power arm 4 of pine line lever 2 is greater than the length of resistance arm 5, and driving source 6 just can drive the swing of pine line lever 2 around fulcrum 3 to drive pine line board 7 and remove towards wire holder 1 and realize the pine line.

Specifically, the drive source 6 in the present embodiment may be a drive source capable of outputting linear motion, such as an electromagnet or an air cylinder. The fulcrum 3 is provided on the driving source mounting plate 17, and specifically, a shaft screw hinged to the release lever 2 may be provided on the driving source mounting plate 17 to form the fulcrum 3. Of course, the shaft position screw can be replaced by various parts such as a rotating shaft, a pin and the like.

In order to avoid clamping stagnation, a strip-shaped hole I13 is formed in the power arm 4 of the thread releasing lever 2 along the length direction of the power arm, and a connecting piece I14 in movable fit with the strip-shaped hole I13 is arranged at the output end of the driving source 6. Preferably, the output shaft of the driving source 6 has a screw thread, and a nut 21 is connected to the output shaft through the screw thread, and the connecting member 14 is disposed on the nut 21, and preferably, the connecting member 14 may be a driving pin, a screw, or the like.

Two strip holes 15 are formed in the resistance arm 5 of the thread loosening lever 2 along the length direction of the resistance arm, and a second connecting piece 16 movably matched with the two strip holes 15 is arranged on the thread loosening plate 7. Specifically, a third strip-shaped hole 22 is formed in the thread loosening mounting plate 8, a second mounting hole 23 is formed in the thread loosening plate 7, and the second connecting piece 16 sequentially penetrates through the third strip-shaped hole 22 and the second mounting hole 23 and is in threaded connection with a second nut 24. The accuracy of the loose wire plate 7 in moving is further improved.

It is worth noting that through the design of the thread releasing lever 2, the energy consumption output of the driving source 6 can be reduced, the size of the driving source 6 is further reduced, the assembling space is saved, the assembling difficulty is reduced, and the assembling convenience is improved. Although the driving source 6 is preferably a linear driving source in the present embodiment, the driving source 6 may be configured as a rotary driving source or the like, and the thread releasing lever 2 may still function as a power saving. And in order to further improve the assembly convenience, with the integrated design of the thread trapper 1, the thread releasing lever 2, the drive source 6, the thread releasing plate 7 on the thread releasing mounting plate 8, form the form of an subassembly, reduce the installation face, convenient equipment is maintained. However, other solutions, such as designing the above parts as a split type, may be possible, but may be somewhat difficult to assemble.

As shown in fig. 2, the thread releasing device further comprises a resetting mechanism 9 which can make the thread releasing plate 7 slide in the direction away from the thread clamping device 1. In this embodiment, the reset mechanism 9 includes the reset spring 10, and one end of the reset spring 10 is fixed in on the thread releasing mounting plate 8, and the other end of the reset spring 10 is connected with the thread releasing lever 2, and the reset spring 10 realizes the reset of the thread releasing plate 7 through self elasticity. However, as another scheme, the driving source 6 can drive the loosening plate 7 to reset by its own reset, which is only inferior to the scheme using the reset spring 10 in feasibility.

The working principle of the utility model is as follows: when needing the pine line, drive the swing of pine line lever 2 through driving source 6 to drive the removal of pine line board 7, make the removal of pine line board 7 towards thread trapper 1, realize the pine line.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A thread slackening device of a sewing machine, characterized in that the thread slackening device comprises:

a wire gripper (1);

the thread releasing lever (2), the thread releasing lever (2) comprises a fulcrum (3), a power arm (4) and a resistance arm (5), and the length of the power arm (4) is greater than that of the resistance arm (5);

the output end of the driving source (6) is connected with the power arm (4) of the thread releasing lever (2), and the driving source can drive the thread releasing lever (2) to swing around the fulcrum (3);

the thread loosening plate (7), the thread loosening plate (7) is connected with the resistance arm (5) of the thread loosening lever (2);

the thread loosening lever (2) can drive the thread loosening plate (7) to move towards the thread clamping device (1) through self swing to realize thread loosening.

2. The thread releasing device of a sewing machine according to claim 1, characterized in that the thread releasing device comprises a thread releasing mounting plate (8), the thread releasing plate (7) is movably engaged with the thread releasing mounting plate (8) and can release thread by sliding towards the thread clamp (1); the thread loosening device further comprises a resetting mechanism (9) which can enable the thread loosening plate (7) to slide towards the direction far away from the thread clamping device (1).

3. The thread releasing device of a sewing machine according to claim 2, wherein the return mechanism (9) comprises a return spring (10), one end of the return spring (10) is fixed to the thread releasing mounting plate (8), and the other end of the return spring (10) is connected to the thread releasing lever (2).

4. The thread releasing device of a sewing machine according to claim 2, wherein a limit screw (11) is provided on the thread releasing mounting plate (8), and a sliding groove (12) which is slidably fitted with the limit screw (11) is provided on the thread releasing plate (7).

5. The thread releasing device of a sewing machine according to claim 4, wherein the limit screw (11) is provided with a limit groove which is matched with the sliding groove (12).

6. The thread releasing device of the sewing machine according to claim 1, 2, 3, 4 or 5, characterized in that the power arm (4) of the thread releasing lever (2) is provided with a first strip-shaped hole (13) along the length direction thereof, and the output end of the driving source (6) is provided with a first connecting piece (14) movably matched with the first strip-shaped hole (13); two (15) in strip hole have been seted up along self length direction in resistance arm (5) of pine line lever (2), have on pine line board (7) with two (15) clearance fit's in strip hole connecting piece two (16).

7. The thread slacking off device of a sewing machine according to claim 2, 3, 4 or 5, further comprising a driving source mounting plate (17) provided on the thread slacking off mounting plate (8), wherein the driving source (6) is fixed to the driving source mounting plate (17), and wherein the fulcrum (3) of the thread slacking off lever (2) is provided on the driving source mounting plate (17).

8. The thread releasing device of a sewing machine according to claim 1 or 2 or 3 or 4 or 5, characterized in that the thread releasing plate (7) is provided with a thread releasing claw (18) which can push open a thread clamping piece on the thread clamping device (1).

9. A sewing machine characterized in that it comprises a thread slacking off device according to any one of claims 1 to 8.