CN210765829U

CN210765829U - Thread trimming device based on large needle plate

Info

Publication number: CN210765829U
Application number: CN201921271094.0U
Authority: CN
Inventors: 綦玉全
Original assignee: Strong H Machinery Technology Co ltd
Current assignee: Strong H Machinery Technology Co ltd
Priority date: 2019-08-07
Filing date: 2019-08-07
Publication date: 2020-06-16
Anticipated expiration: 2029-08-07

Abstract

The utility model discloses a thread trimming device based on a large needle plate, wherein the middle part of the large needle plate body is provided with a needle hole for accommodating a sewing needle to shuttle, a fixed knife is fixedly arranged on the lower surface of the large needle plate body and one side of the needle hole, a movable knife is hinged, the movable knife can be driven by a transmission mechanism of a sewing machine to do reciprocating swing to be matched with the fixed knife in a shearing manner, different from the prior art, a second fixed knife and a cylinder are fixedly arranged on the lower surface of the large needle plate body and the other side of the needle hole, a second movable knife is hinged through a hinge shaft, the end of a cylinder rod of the cylinder is hinged with one end of a connecting rod, the other end of the connecting rod is hinged with the second movable knife, and the second movable knife is; and a square hole for allowing the thread end remained on the garment piece in the previous process to enter is formed in the large needle plate body corresponding to the shearing part of the second movable knife and the second fixed knife. The utility model discloses cut off the end of a thread that remains on the clothing piece and produce by last process in this process sewing operation, need not extra process, reduce the cost of labor.

Description

Thread trimming device based on large needle plate

Technical Field

The utility model relates to a sewing machine specifically is a trimming device based on big faller.

Background

The wire cutting device is integrated on the large needle plate, so that the modular design and convenient maintenance are of great significance. The utility model discloses a thread trimming mechanism of sewing machine that is disclosed as utility model patent with publication number CN204780201U, including actuating mechanism, fix stationary knife one on the faller downside and articulate the sword one that moves on the faller downside, move sword one and the cooperation of stationary knife is done the shearing action under actuating mechanism's effect, the faller downside is equipped with the suction element, suction element one end is connected with the getter device, it makes the driving piece one that the end day of the other end of this suction element is just right or keep away from with the pinhole of faller to have the drive piece one that is used for driving the suction element to make the other end of this suction element, be fixed with stationary knife two and articulated have the movable knife spare that has the cutting edge under the faller downside, still have on the faller to be used for driving the movable knife spare to make this move sword piece and stationary knife cooperation will follow the upper thread that wears. The utility model discloses an adopt comparatively complicated two sets of actuating mechanism to realize cutting short with the facial line that the surface fabric links to each other, still can not cut the end of a thread that remains on the clothing piece and produce by the process of the last way.

Disclosure of Invention

The utility model aims at overcoming the not enough of prior art, disclosing a structure more succinct, do not change the positive inherent form of faller a trimming device based on big faller, the technical scheme who adopts is:

a thread cutting device based on a large needle plate is characterized in that a needle hole for allowing a sewing needle to shuttle is formed in the middle of a large needle plate body, a fixed knife is fixedly arranged on the lower surface of the large needle plate body and one side of the needle hole, a movable knife is hinged to the lower surface of the large needle plate body, the movable knife can be driven by a transmission mechanism of a sewing machine to swing in a reciprocating mode so as to be matched with the fixed knife in a cutting mode, the thread cutting device is different from the prior art in that a second fixed knife and a cylinder are fixedly arranged on the lower surface of the large needle plate body and the other side of the needle hole, a second movable knife is hinged to a hinge shaft, the end of a cylinder rod of the cylinder is hinged to one end of a connecting rod, the other end of the connecting rod is hinged to the; and square holes for allowing the thread ends left on the garment piece in the previous working procedure to enter are formed in the large needle plate body corresponding to the shearing position of the second movable knife and the second fixed knife. The fixed knife and the movable knife are matched in a shearing mode to cut off the sewing thread generated between the sewing needle and the garment piece in the working procedure, and the second movable knife and the second fixed knife are matched in a shearing mode to cut off the thread end which is remained on the garment piece in the previous working procedure during the sewing operation in the working procedure, so that the additional working procedure is not needed, and the labor cost is reduced.

Furthermore, a fixed seat is fixedly arranged on the lower surface of the large needle plate body corresponding to the square hole, an air suction pipe is fixedly arranged on the fixed seat, and the pipe orifice of the air suction pipe is over against the square hole. Therefore, the thread end passing through the square hole is automatically sucked without utilizing gravity to hang in or manually penetrate.

Furthermore, a bolt is screwed on the hinge shaft, a screw rod of the bolt is sleeved with a spring, one end of the spring abuts against the bolt head, and the other end of the spring abuts against the second movable knife. The clearance and the pressure between the second movable knife and the second fixed knife can be adjusted at any time, and the side effect generated after the knife tool is worn is counteracted.

Further, a groove is formed by extending upwards from the lower surface of the large needle plate body, a circular needle plate is fixedly arranged at the bottom of the groove, the needle hole is formed in the center of the circular needle plate, the lower surface of the circular needle plate also extends upwards to form a step surface, and the distance between the step surface and the upper surface of the large needle plate body is 1-1.8 mm; the edge of the fixed knife extends to the bottom of the groove and is abutted against the lower surface of the circular needle plate. Therefore, the thread end of the bottom thread of the cloth can be within 2MM after the sewing machine finishes sewing and cuts the thread.

Furthermore, a reflective eye is arranged in the square hole or close to the square hole, the reflective eye sends a signal to a control device after detecting that a garment piece passes through, and the control device controls the cylinder to act to cut threads and controls the air suction device to provide negative pressure for the air suction pipe. The automation degree is better, more energy-conserving, more can increase of service life.

Further, the square hole extends to the shearing part of the second movable knife and the second fixed knife to form an acute angle. After the thread head is pulled to the sharp angle, the thread head is limited, so that the thread head is favorable for shearing and is more favorable for shearing.

Further, the tail end of the movable knife is hinged to the lower surface of the large needle plate body, one end of the connecting plate is hinged to the middle of the movable knife, and the connecting plate drives the movable knife to swing through the driving mechanism so that the movable knife is in shearing fit with the fixed knife.

Further, the edge end of the fixed knife is tangent to the pinhole. Therefore, the thread end is cut after exceeding the needle hole, and the cutting is more facilitated.

Drawings

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

Fig. 2 is a schematic structural diagram of another view angle of the present invention.

Fig. 3 is a schematic structural diagram of another view angle of the present invention.

Fig. 4 is a schematic structural diagram of the circular needle plate of the present invention.

Fig. 5 is a schematic structural view of another view angle of the circular needle plate of the present invention.

Detailed Description

As shown in fig. 1-3, in a thread trimming apparatus based on a large needle plate, a needle hole 101 for accommodating a sewing needle to shuttle is formed in the middle of a large needle plate 100, a fixed knife 103 is fixedly arranged on the lower surface of the large needle plate 100 and one side of the needle hole 101, a movable knife 102 is hinged to the fixed knife 103, the movable knife 102 can be driven by a transmission mechanism of a sewing machine to swing back and forth to be in shearing fit with the fixed knife 103, a second fixed knife 104 and a cylinder 106 are fixedly arranged on the lower surface of the large needle plate 100 and the other side of the needle hole 101, a second movable knife 105 is hinged to the other side of the needle hole 101 through a hinge shaft, a rod end of the cylinder 106 is hinged to one end of a connecting rod 107, the other end of the connecting rod 107 is hinged to the second movable knife 105, and the second movable knife 105 is in shearing fit with the; a square hole 108 into which the thread end remaining on the workpiece in the previous step can be inserted is formed in the large needle plate body 100 at a position corresponding to a cut portion between the second movable blade 105 and the second fixed blade 104. A fixing seat 109 is fixedly arranged on the lower surface of the large needle plate body 100 corresponding to the square hole 108, an air suction pipe 110 is fixedly arranged on the fixing seat 109, and the opening of the air suction pipe 110 is opposite to the square hole 108. The hinge shaft is screwed with a bolt 112, a screw of the bolt 112 is sleeved with a spring, one end of the spring is propped against the head of the bolt, and the other end of the spring is propped against the second movable knife 105. And a reflective eye is arranged in the square hole 108 or close to the square hole, the reflective eye sends a signal to a control device after detecting that a garment piece passes through, and the control device controls the cylinder 106 to act to cut threads and controls an air suction device to provide negative pressure for the air suction pipe 110. The square hole 108 extends to form an acute angle 111 where the second movable knife 105 and the second fixed knife 104 meet. A groove 114 is formed by extending upwards from the lower surface of the large needle plate body 100, a circular needle plate 115 is fixedly arranged at the bottom of the groove 114, the needle hole 101 is arranged at the center of the circular needle plate 115, the lower surface of the circular needle plate 115 also extends upwards to form a step surface 116, and the distance between the step surface and the upper surface of the large needle plate body is 1-1.8 mm; the edge of the fixed blade 103 extends toward the bottom of the recess 114 and abuts against the lower surface of the circular needle plate 115. The tail end of the movable knife 102 is hinged to the lower surface of the large needle plate body 100, one end of a connecting plate 113 is hinged to the middle of the movable knife 102, and the connecting plate 113 reciprocates through a driving mechanism to drive the movable knife 102 to swing so that the movable knife 102 is in shearing fit with the fixed knife 103. The edge end of the fixed knife 103 is tangent to the pinhole 101.

Claims

1. The utility model provides a thread trimming device based on big faller, the middle part of big faller plate body (100) has pinhole (101) that hold the sewing needle to shuttle through the lower surface of big faller plate body (100) one side of pinhole (101) sets firmly fixed sword (103), and movable sword (102) are established to the hinge, movable sword (102) can be driven by sewing machine's drive mechanism do reciprocal swing with fixed sword (103) are cuted the cooperation, its characterized in that: a second fixed knife (104) and an air cylinder (106) are fixedly arranged on the lower surface of the large needle plate body (100) and the other side of the needle hole (101), a second movable knife (105) is hinged through a hinge shaft, the rod end of a cylinder rod of the air cylinder (106) is hinged to one end of a connecting rod (107), the other end of the connecting rod (107) is hinged to the second movable knife (105), and the second movable knife (105) is in shearing fit with the second fixed knife (104); and a square hole (108) for allowing the thread end remained on the garment piece in the previous process to enter is formed in the large needle plate body (100) corresponding to the shearing part of the second movable knife (105) and the second fixed knife (104).

2. The thread trimming device based on the large needle plate as claimed in claim 1, wherein: the lower surface of the large needle plate body (100) corresponding to the square hole (108) is fixedly provided with a fixed seat (109), an air suction pipe (110) is fixedly arranged on the fixed seat (109), and the opening of the air suction pipe (110) is over against the square hole (108).

3. The thread trimming device based on the large needle plate as claimed in claim 1, wherein: a bolt (112) is screwed on the hinge shaft, a screw rod of the bolt (112) is sleeved with a spring, one end of the spring is propped against the head of the bolt, and the other end of the spring is propped against the second movable knife (105).

4. The thread trimming device based on the large needle plate as claimed in claim 1, wherein: a groove (114) is formed by upward extending from the lower surface of the large needle plate body (100), a circular needle plate (115) is fixedly arranged at the bottom of the groove (114), the needle hole (101) is arranged at the center of the circular needle plate (115), the lower surface of the circular needle plate (115) also extends upwards to form a step surface (116), and the distance between the step surface and the upper surface of the large needle plate body is 1-1.8 mm; the edge of the fixed blade (103) extends to the bottom of the recess (114) and abuts against the lower surface of the circular needle plate (115).

5. The thread trimming device based on the large needle plate as claimed in claim 2, wherein: and a reflective eye is arranged in the square hole (108) or close to the square hole, the reflective eye sends a signal to a control device after detecting that a garment piece passes through, and the control device controls the cylinder (106) to act to cut threads and controls the air suction device to provide negative pressure for the air suction pipe (110).

6. A large needle board based thread trimmer according to claim 1 or 2, wherein: the square hole (108) extends to the shearing part of the second movable knife (105) and the second fixed knife (104) to form an acute angle (111).

7. The thread trimming device based on the large needle plate as claimed in claim 4, wherein: the tail end of the movable knife (102) is hinged to the lower surface of the large needle plate body (100), one end of the connecting plate (113) is hinged to the middle of the movable knife (102), and the connecting plate (113) drives the movable knife (102) to swing through the driving mechanism so that the movable knife (102) and the fixed knife (103) are in shearing fit.

8. The thread trimming device based on the large needle plate as claimed in claim 4, wherein: the edge end of the fixed knife (103) is tangent to the pinhole (101).