CN113930910B

CN113930910B - Thread pressing sewing mechanism and method for placket machine, placket machine and placket sewing method

Info

Publication number: CN113930910B
Application number: CN202010674026.XA
Authority: CN
Inventors: 叶彬
Original assignee: Bullmer Electromechanical Technology Co Ltd
Current assignee: Bullmer Electromechanical Technology Co Ltd
Priority date: 2020-07-14
Filing date: 2020-07-14
Publication date: 2023-07-25
Anticipated expiration: 2040-07-14
Also published as: CN113930910A

Abstract

The invention provides a thread pressing sewing mechanism and method for a fly sewing machine, the fly sewing machine and a fly sewing method; the thread pressing and sewing mechanism comprises a sewing machine head, two groups of presser foot mechanisms which are symmetrically arranged left and right, a presser foot main driving source, a left-direction cloth folding mechanism and a right-direction cloth folding mechanism; each group of presser foot mechanism comprises a clamp arm, an outer presser foot, an inner presser foot and an inner presser foot driving source, wherein the outer presser foot is used for pressing and pasting a large piece of cloth and is fixed on the clamp arm, the inner presser foot is used for pressing and pasting placket cloth, and the inner presser foot driving source is arranged on the clamp arm and is connected with the inner presser foot and drives the inner presser foot to move in a direction approaching or separating from the placket cloth; the main presser foot driving source is connected with the clamp arm and drives the outer presser foot and the inner presser foot to move in a direction approaching or separating from the large cloth piece and the placket; the left-hand plaiting mechanism and the right-hand plaiting mechanism both act on the placket. The sewing machine can sew out the pressing line on the placket machine, and the cloth piece is not required to be taken down from the placket machine to be taken down to the flat seaming machine for sewing the pressing line, so that the sewing machine is particularly suitable for sewing the hidden placket.

Description

Thread pressing sewing mechanism and method for placket machine, placket machine and placket sewing method

Technical Field

The invention relates to a line pressing and sewing mechanism for a placket machine.

The invention also relates to a thread pressing sewing method for the placket machine by using the thread pressing sewing mechanism.

The invention further relates to a placket machine comprising the line pressing and sewing mechanism.

The invention also relates to a placket sewing method by using the placket machine.

Background

At present, the sewing technology of the top fly of the garment comprises the following steps: first, as shown in fig. 1, a first stitch 133, a second stitch 134, and a third stitch 135, which are sequentially connected, are sewn to a large cloth piece 131 and a placket 132, and of course, only the first stitch 133 and the third stitch 135 may be sewn; secondly, as shown in fig. 2, the placket 132 is folded rightwards along the first section of the stitching 133, and a pressing line 136 which is close to the right side of the first section of the stitching 133 is sewn on the large cloth piece 131 and the placket 132; finally, as shown in fig. 3, the fly 132 is folded left along the pressing line 136, and the fly 132 and the large cloth piece 131 are cut between the pressing line 136 and the three-stage stitching line 135, so that the fly 132 and the large cloth piece 131 have a middle knife cutting line 137 between the pressing line 136 and the three-stage stitching line 135.

The existing placket machine is provided with a sewing mechanism and a presser foot mechanism, wherein the presser foot mechanism is provided with an outer presser foot for pressing a large cloth piece and an inner presser foot for pressing placket cloth, for example, an automatic adjusting mechanism for the placket machine presser foot is disclosed in Chinese patent specification with the application number 201510732646.3. When the placket machine is used for sewing the hidden placket, after the first section of stitching, the second section of stitching and the third section of stitching are finished, cloth is required to be taken to a flat seaming machine, then the placket cloth is manually turned over to finish sewing of line pressing, and then the middle knife cutting line is manually cut out by scissors. Therefore, the existing fly machine has single function, and can not realize automatic sewing of the hidden fly. In addition, because the middle knife cutting line is closer to the line pressing line, the requirement on the sewing technical content of the line pressing line is higher, and a skilled worker is required to operate the sewing of the line pressing line.

Disclosure of Invention

In view of the above-described drawbacks of the prior art, an object of the present invention is to provide a thread pressing and sewing mechanism for a fly machine, which can automatically complete sewing of a concealed fly.

In order to achieve the above purpose, the invention provides a thread pressing and sewing mechanism for a placket machine, which comprises a sewing machine head, two groups of presser foot mechanisms symmetrically arranged left and right, a presser foot main driving source, a left-hand cloth folding mechanism and a right-hand cloth folding mechanism; each group of presser foot mechanism comprises a clamp arm, an outer presser foot, an inner presser foot and an inner presser foot driving source, wherein the outer presser foot is used for pressing and pasting a large piece of cloth and is fixed on the clamp arm, the inner presser foot is used for pressing and pasting placket cloth, and the inner presser foot driving source is arranged on the clamp arm and is connected with the inner presser foot and drives the inner presser foot to move in a direction approaching or separating from the placket cloth; the main presser foot driving source is connected with the clamp arm and drives the outer presser foot and the inner presser foot to move in a direction approaching or separating from the large cloth piece and the placket; the left-hand plaiting mechanism and the right-hand plaiting mechanism both act on the placket.

Further, the line pressing sewing mechanism further comprises a movable driving source, a movable transmission mechanism and a presser foot adjusting mechanism, wherein the movable driving source is connected with the presser foot adjusting mechanism through the movable transmission mechanism and drives the presser foot adjusting mechanism to reciprocate back and forth, and the presser foot main driving source and the two groups of presser foot mechanisms are both arranged on the presser foot adjusting mechanism.

Further, the movable driving source is a motor, the movable transmission mechanism is a synchronous pulley assembly driven by the movable driving source to operate, and a conveyor belt in the synchronous pulley assembly is fixed with an adjusting frame of the presser foot adjusting mechanism.

Further, the presser foot adjusting mechanism comprises an adjusting rack, an adjusting driving source fixed on the adjusting rack, a left screw rod and a right screw rod which are both rotatably installed in the adjusting rack, and a left adjusting arm and a right adjusting arm which are both movably installed on the adjusting rack, wherein the adjusting driving source drives the left screw rod and the right screw rod to rotate, the left screw rod and the right screw rod are coaxially arranged and are fixed, the left adjusting arm is in threaded fit with the left screw rod, the right adjusting arm is in threaded fit with the right screw rod, and the directions of threads on the left screw rod and the right screw rod are opposite; the clamp arms of the two groups of presser foot mechanisms are fixedly connected with the left adjusting arm and the right adjusting arm respectively.

Further, the presser foot adjusting mechanism comprises an adjusting rack, an adjusting driving source fixed on the adjusting rack, a left screw rod and a right screw rod which are both rotatably arranged in the adjusting rack, a left adjusting arm and a right adjusting arm which are both movably arranged on the adjusting rack, and a sliding sleeve respectively fixedly sleeved on the left adjusting arm and the right adjusting arm, wherein the adjusting driving source drives the left screw rod and the right screw rod to rotate, the left screw rod and the right screw rod are coaxially arranged and are fixed with each other, the sliding sleeve on the left adjusting arm is in threaded fit with the left screw rod, the sliding sleeve on the right adjusting arm is in threaded fit with the right screw rod, and the directions of the threads on the left screw rod and the right screw rod are opposite; the clamp arms of the two groups of presser foot mechanisms are fixedly connected with the left adjusting arm and the right adjusting arm respectively.

Further, the left adjusting arm is rotatably mounted on the adjusting rack through a left screw rod, and the right adjusting arm is rotatably mounted on the adjusting rack through a right screw rod; the adjusting frame is provided with a movable driving block which can move up and down and is driven to move by a presser foot main driving source at the other end parts of the left adjusting arm and the right adjusting arm, a supporting shaft which extends leftwards and rightwards is fixedly arranged in each movable driving block, and the left adjusting arm and the right adjusting arm are respectively rotatably arranged on the supporting shafts in the two movable driving blocks.

Further, the lower extreme of adjusting the frame is fixed with the guide block that is located between two removal drive blocks, set up the guide slot that extends from top to bottom in the guide block, the tip of back shaft is located the guide slot, both sliding fit.

Further, each group of presser foot mechanisms further comprises an inner presser foot lifting mechanism connected between the inner presser foot and an inner presser foot driving source, wherein the inner presser foot driving source is provided with a telescopic driving part; the internal pressure foot lifting mechanism comprises a mounting bracket fixed on the clamp arm, a supporting plate fixed on the outer presser foot, a connecting sleeve fixed at the end part of the telescopic driving part and a swinging bracket rotatably mounted on the supporting plate, wherein the internal pressure foot driving source is rotatably mounted on the mounting bracket, the connecting sleeve is rotatably mounted on the swinging bracket, and the swinging bracket is fixed with the internal pressure foot.

Further, each group of presser foot mechanisms further comprises an inner presser foot lifting mechanism connected between the inner presser foot and an inner presser foot driving source, wherein the inner presser foot driving source is provided with a telescopic driving part; the inner pressure foot lifting mechanism comprises a mounting bracket fixed on the clamp arm and a swinging bracket rotatably mounted on the outer pressure foot, the inner pressure foot driving source is rotatably connected with the mounting bracket, the telescopic driving part is rotatably connected with the swinging bracket, and the swinging bracket and the inner pressure foot are fixed.

Further, each group of presser foot mechanisms further comprises an inner presser foot lifting mechanism connected between the inner presser foot and an inner presser foot driving source, wherein the inner presser foot driving source is provided with a telescopic driving part; the internal pressure foot lifting mechanism comprises a mounting bracket fixed on the clamp arm, a driving rack driven by an internal pressure foot driving source to move left and right, a mounting plate fixed on the external pressure foot, a rotating shaft rotatably mounted on the mounting plate, a driving gear fixed on the rotating shaft and a swinging bracket, wherein the driving rack is meshed with the driving gear, and two ends of the swinging bracket are respectively fixed with the rotating shaft and the internal pressure foot.

Further, the left cloth folding mechanism comprises a right side air blowing pipe fixed on the left end face of the outer presser foot in the right side pressure foot assembly, two ends of the right side air blowing pipe are respectively connected with an air pipe joint and an air pipe plug, and a plurality of left-facing air blowing holes are formed in the right side air blowing pipe; the right cloth folding mechanism comprises a left side air blowing pipe fixed on the right end face of the outer presser foot in the left side pressure foot assembly, two ends of the left side air blowing pipe are respectively connected with an air pipe joint and an air pipe plug, and a plurality of right-facing air blowing holes are formed in the left side air blowing pipe.

Further, the left cloth folding mechanism further comprises a left cloth folding driving source, a left presser foot base which is driven by the left cloth folding driving source and moves leftwards and downwards, and a left cloth folding presser foot which is rotatably arranged on the left presser foot base through a presser foot shaft, wherein the left cloth folding presser foot can press and paste the placket cloth; the right cloth folding mechanism further comprises a right cloth folding driving source, a right presser foot base which is driven by the right cloth folding driving source and moves downwards to the right, and a right cloth folding presser foot which is rotatably arranged on the right presser foot base through a presser foot shaft, wherein the right cloth folding presser foot can press and paste placket cloth.

Further, a torsion spring is sleeved on the presser foot shaft, two ends of the torsion spring in the left cloth folding mechanism are respectively abutted to the left cloth folding presser foot base and the left cloth folding presser foot, and two ends of the torsion spring in the right cloth folding mechanism are respectively abutted to the right cloth folding presser foot base and the right cloth folding presser foot.

Further, the inner presser foot, the left cloth folding presser foot and the right cloth folding presser foot are tooth-shaped presser feet and are provided with a plurality of cloth pressing teeth which are arranged front and back; when the inner presser foot and the left cloth folding presser foot are pressed against the placket front cloth, cloth pressing teeth on the left cloth folding presser foot are opposite to cloth pressing teeth on the inner presser foot in the left foot pressing mechanism and are arranged in a front-back collinear staggered manner; when the inner presser foot and the right cloth folding presser foot are pressed against the placket front cloth, cloth pressing teeth on the right cloth folding presser foot are opposite to cloth pressing teeth on the inner presser foot in the right foot pressing mechanism and are arranged in a front-back collinear staggered mode.

The invention also provides a line pressing and sewing method for the placket machine, which uses the line pressing and sewing mechanism, and the line pressing and sewing method sequentially comprises the following steps:

s1, placing a placket on a preset position on a large cloth piece, wherein a presser foot main driving source acts to drive an outer presser foot and an inner presser foot to move towards a direction close to the large cloth piece and the placket, so that inner presser feet in two groups of presser foot mechanisms respectively press the left side and the right side of the placket, and outer presser feet in the two groups of presser foot mechanisms respectively press the large cloth piece;

s2, sewing a first section of stitching and three sections of stitching positioned on the right side of the first section of stitching on the large cloth piece and the placket cloth by the sewing machine head;

s3, an inner presser foot driving source in the presser foot mechanism acts to drive the inner presser foot to move in a direction away from the placket cloth;

s4, the right cloth folding mechanism acts to enable the placket cloth to be folded rightwards along the first section of stitching line;

s5, an inner presser foot driving source in the presser foot mechanism acts to drive the inner presser foot to move towards the direction close to the placket cloth, and the inner presser foot in the right presser foot mechanism is pressed and attached to the folded placket cloth;

s6, sewing a pressing line positioned on the right side of the first section of the sewing thread on the large cloth piece and the placket cloth by the sewing machine head.

The invention further provides a placket machine, which comprises a frame, a bedplate fixed on the frame and the line pressing and sewing mechanism, wherein the sewing machine head, the presser foot mechanism, the left cloth folding mechanism and the right cloth folding mechanism are all arranged above the bedplate.

Further, the fly machine further comprises a cutter mechanism, wherein the cutter mechanism is arranged above the platen, and the cutter mechanism is provided with a cutter capable of moving towards a direction approaching or separating from the fly cloth.

The invention also provides a front fly sewing method, which uses the front fly machine, and comprises the following steps in sequence:

s2, sewing a first section of stitching and three sections of stitching positioned on the right side of the first section of stitching on the large cloth piece and the placket at the sewing machine head;

S6, sewing a pressing line positioned on the right side of the first section of the stitching line on the large cloth piece and the placket cloth by the sewing machine head;

s7, an inner presser foot driving source in the presser foot mechanism acts to drive the inner presser foot to move in a direction away from the placket cloth;

s8, the left folding mechanism acts to enable the placket cloth which is folded right in the step S4 to be folded left along the pressing line;

s9, an inner presser foot driving source in the presser foot mechanism acts to drive the inner presser foot to move towards the direction close to the placket cloth, and the inner presser feet in the two groups of presser foot mechanisms respectively press and paste the placket cloth;

s10, a cutter in the cutter mechanism moves towards the direction close to the placket cloth, the placket cloth and the large cloth piece are cut, and a middle cutter cutting line positioned between the pressing line and the three-section stitching line is formed on the placket cloth and the large cloth piece.

As described above, the thread pressing sewing mechanism and method for a placket machine, the placket machine and the placket sewing method according to the present invention have the following advantages:

the large cloth piece and the placket cloth can be pressed and pasted, the placket cloth can be turned left and right, the large cloth piece and the placket cloth can be sewn, and the first section stitching line and the third section stitching line can be sequentially sewn, the placket cloth can be turned left and right, and the pressing line can be sewn through the mutual matching among the presser foot mechanism, the left-hand placket mechanism and the right-hand placket mechanism. Therefore, the thread pressing device can sew out thread pressing lines on the fly machine, cloth pieces do not need to be additionally taken down from the fly machine and taken to the flat sewing machine to sew out the thread pressing lines, and the thread pressing device is particularly suitable for sewing the hidden fly, enriches functions of the fly machine, improves automation degree and sewing efficiency of sewing the hidden fly by the fly machine, and finally improves sewing quality of the hidden fly.

Drawings

Fig. 1 to 3 are schematic flow diagrams of a placket sewing process.

Fig. 4 is a schematic structural view of the fly frame in the present application.

Fig. 5 and 6 are schematic views of the connection between the presser foot adjusting mechanism and the presser foot mechanism embodiment of the present application under different viewing angles.

Fig. 7 is a schematic structural view of a first embodiment of a presser foot mechanism in the present application.

Fig. 8 is an exploded view of fig. 7.

Fig. 9 is a schematic structural view of a second embodiment of a presser foot mechanism in the present application.

Fig. 10 is an exploded view of the right foot-pressing mechanism of fig. 9.

Fig. 11 is a schematic structural view of a third embodiment of a presser foot mechanism in the present application.

Fig. 12 is an exploded view of the right foot-pressing mechanism of fig. 11.

Fig. 13 is a schematic structural diagram of a left-hand folding mechanism and a right-hand folding mechanism in the present application.

Fig. 14 is an exploded view of the left fold mechanism of fig. 13.

Fig. 15 is a schematic view showing the cooperation of the right cloth folding presser foot and the inner presser foot in the right presser foot pressing mechanism in the present application.

Fig. 16 to 18 are schematic views illustrating the working principle of the right cloth folding presser foot in the present application.

Fig. 19 is a state diagram of the fly machine in the present application when the first stitch and the three stitches are sewn.

Fig. 20 is a state diagram of the placket machine in the present application when the placket fabric is turned right.

Fig. 21 is a state diagram of the fly machine in the present application when the fly cloth after the pressing line is sewn is turned left.

Fig. 22 is a state diagram of the fly machine in the present application when cutting the fly cloth and the large cloth piece.

Description of element reference numerals

10. Presser foot main driving source

20. Presser foot mechanism

21. Clamp arm

22. Outer presser foot

23. Inner presser foot

231. Inner presser foot seat

232. Inner presser foot body

24. Inner presser foot driving source

25. Inner presser foot lifting mechanism

251. Mounting bracket

252. Supporting plate

253. Connecting sleeve

254. Swing support

255. Driving rack

256. Mounting plate

257. Rotary shaft

258. Driving gear

259. Swinging support shaft

26. Presser foot adapter block

30. Left cloth folding mechanism

31. Right side air blowing pipe

32. Tracheal joint

33. Tracheal choke plug

34. Left cloth folding driving source

35. Left presser foot base

36. Left cloth folding presser foot

37. Presser foot shaft

38. Torsion spring

40. Right cloth folding mechanism

41. Left side air blowing pipe

42. Right cloth folding driving source

43. Right-hand presser foot base

44. Right cloth folding presser foot

50. Mobile driving source

60. Movable transmission mechanism

61. Conveyor belt

62. Active synchronous wheel

63. Driven synchronous wheel

70. Presser foot adjusting mechanism

71. Adjusting rack

72. Adjusting the drive source

73. Left side screw rod

74. Right screw rod

75. Left adjusting arm

76. Right adjusting arm

77. Movable driving block

78. Supporting shaft

79. Guide block

710. Sliding sleeve

80. Rack

90. Platen plate

110. Cutter mechanism

120. Supporting frame

131. Large cloth piece

132. Front fly cloth

133. First section suture

134. Two-section suture

135. Three-section suture

136. Wire pressing

137. Middle knife cutting line

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 adjustments of the sizes, which are otherwise, used in the practice of the invention, are included in the spirit and scope of the invention which is otherwise, without departing from the spirit or scope thereof. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like are used herein for descriptive purposes only and not for purposes of limitation, and are intended to limit the scope of the invention as defined by the claims and the relative terms thereof as construed as corresponding to the claims.

As shown in fig. 4, the present application provides a fly machine comprising a frame 80, a platen 90 fixed to an upper end of the frame 80, and a thread pressing sewing mechanism. For convenience of description, the following directions are defined in the following examples: the longitudinal direction of the platen 90 is defined as the front-rear direction, the width direction of the platen 90 is defined as the left-right direction, and the thickness direction of the platen 90 is defined as the up-down direction. Further, the thread pressing sewing mechanism for the placket machine in the present application includes a sewing machine head, two groups of presser foot mechanisms 20, a presser foot main driving source 10, a left-hand cloth folding mechanism 30, and a right-hand cloth folding mechanism 40, which are symmetrically arranged, and the sewing machine head, the presser foot mechanism 20, the left-hand cloth folding mechanism 30, and the right-hand cloth folding mechanism 40 are all installed above the platen 90. The main shaft in the sewing machine head extends axially in the left-right direction. As shown in fig. 5 and 6, each set of presser foot mechanisms 20 includes a clamp arm 21, an outer presser foot 22 for pressing a large cloth piece 131 and fixed to the clamp arm 21 by screws, an inner presser foot 23 for pressing a placket 132, and an inner presser foot driving source 24 mounted to the clamp arm 21, the inner presser foot driving source 24 being connected to the inner presser foot 23 for driving the inner presser foot 23 to move in a direction approaching or separating from the placket 132; the presser foot main driving source 10 is connected with the clamp arm 21 and drives the outer presser foot 22 and the inner presser foot 23 to move in a direction approaching or separating from the large cloth piece 131 and the placket 132; both the left-hand plaiting mechanism 30 and the right-hand plaiting mechanism 40 act on the fly 132.

The invention also provides a line pressing and sewing method for the placket machine, which sequentially comprises the following steps of:

s1, placing a placket 132 at a preset position on a large cloth piece 131, and enabling a presser foot main driving source 10 to act to drive an outer presser foot 22 and an inner presser foot 23 to move towards a direction approaching the large cloth piece 131 and the placket 132, wherein the inner presser feet 23 in the two groups of presser foot mechanisms 20 respectively press the left side and the right side of the placket 132, and the outer presser feet 22 in the two groups of presser foot mechanisms 20 respectively press the large cloth piece 131 as shown in FIG. 19;

s2, a sewing machine head sequentially sews a first section of stitching 133 and three sections of stitching 135 positioned on the right side of the first section of stitching 133 on the large cloth piece 131 and the placket 132, as shown in FIG. 1;

s3, when the inner presser foot driving source 24 in the presser foot mechanism 20 operates to drive the inner presser foot 23 to move in a direction away from the placket 132, the inner presser foot 23 is separated from the placket 132 and is not pressed against the placket 132, but the outer presser foot 22 is still pressed against the large cloth piece 131;

s4, the right cloth folding mechanism 40 acts to enable the placket 132 to be folded rightwards along the first section of stitching 133, as shown in FIG. 20;

s5, the inner presser foot driving source 24 in the presser foot mechanism 20 operates to drive the inner presser foot 23 to move towards the direction of the placket 132, so that the inner presser foot 23 in the right presser foot mechanism 20 is pressed against the folded placket 132;

S6, the sewing machine head sews a pressing line 136 positioned on the right side of the first section of the stitching line 133 on the large cloth piece 131 and the placket 132, as shown in fig. 2.

From the above, the thread pressing and sewing mechanism according to the present application can press and attach the large cloth piece 131 and the placket 132, turn the placket 132 left and right, and sew the large cloth piece 131 and the placket 132, and sequentially sew the first-stage thread 133 and the three-stage thread 135, turn the placket 132, and sew the thread pressing and sewing 136 by the mutual cooperation among the presser foot mechanism 20, the left-hand placket mechanism 30, and the right-hand placket mechanism 40. Therefore, the pressing line 136 can be sewn on the fly machine, and the cloth piece does not need to be taken down from the fly machine to be taken down to the flat sewing machine to be sewn on the pressing line 136, so that the flat sewing machine is particularly suitable for sewing the hidden fly, enriches functions of the fly machine, improves the automation degree and sewing efficiency of sewing the hidden fly by the fly machine, and finally improves the sewing quality of the hidden fly.

Further, as shown in fig. 4, the fly machine further includes a cutter mechanism 110, the cutter mechanism 110 being mounted above the platen 90, the cutter mechanism 110 having a cutter movable in a direction toward or away from the fly 132. Preferably, the cutter moves in a reciprocating manner. Based on the fly sewing machine provided with the cutter mechanism 110, the application also provides a fly sewing method, which comprises the steps S7 to S10 after the step S6 besides the steps S1 to S6. Specifically, after the step S6 is performed and the pressing lines 136 are sewn on the large cloth piece 131 and the placket 132, the placket sewing method sequentially performs the following steps:

S7, when the inner presser foot driving source 24 in the presser foot mechanism 20 operates to drive the inner presser foot 23 to move in a direction away from the placket 132, the inner presser foot 23 is separated from the placket 132 and is not pressed against the placket 132, but the outer presser foot 22 is still pressed against the large cloth piece 131;

s8, the left folding mechanism 30 acts to enable the placket 132 folded right in the step S4 to be folded left along the pressing line 136, as shown in FIG. 21;

s9, the inner presser foot driving source 24 in the presser foot mechanism 20 operates to drive the inner presser foot 23 to move towards the front fly 132, so that the inner presser feet 23 in the two groups of presser foot mechanisms 20 press against the front fly 132 respectively, as shown in FIG. 22;

s10, a cutter in the cutter mechanism 110 moves towards the direction close to the fly cloth 132, cuts the fly cloth 132 and the large cloth piece 131, and a middle cutter cutting line 137 between the pressing line 136 and the three-section stitching line 135 is formed on the fly cloth 132 and the large cloth piece 131, as shown in fig. 3.

Therefore, the front fly machine that this application relates to can realize in proper order making first section suture 133 and three sections suture 135, turning over a front fly cloth 132, making the line 136, reverse turn over a front fly cloth 132, and cut a front fly cloth 132 and big cloth piece 131, so the front fly machine can accomplish the hidden front fly automatically and make technology, need not rely on flush joint machine and manual work to cut a front fly cloth 132 and big cloth piece 131, degree of automation improves greatly, finally is showing improvement hidden front fly and is making efficiency and quality.

Further, as shown in fig. 4, the thread pressing sewing mechanism according to the present application further includes a moving driving source 50, a moving transmission mechanism 60, and a presser foot adjusting mechanism 70, wherein the moving driving source 50 is connected to the presser foot adjusting mechanism 70 through the moving transmission mechanism 60, and drives the presser foot adjusting mechanism 70 to reciprocate back and forth, and the presser foot main driving source 10 and the two sets of presser foot mechanisms 20 are both mounted on the presser foot adjusting mechanism 70. In the initial state of the placket machine, the two groups of presser foot mechanisms 20 are positioned at the rear side of the sewing machine head, and the outer presser foot 22 and the inner presser foot 23 in the two groups of presser foot mechanisms 20 are far away from the platen 90; when the hidden placket is required to be sewn, the movable driving source 50 acts, the movable driving source 50 drives the presser foot adjusting mechanism 70 to move forward through the movable transmission mechanism 60, and the presser foot adjusting mechanism 70 drives the presser foot main driving source 10 and the two groups of the presser foot mechanisms 20 to move forward together, so that the two groups of the presser foot mechanisms 20 move to the sewing machine head; after the hidden door front is sewn, the movable driving source 50 drives the presser foot adjusting mechanism 70 to move backwards through the movable transmission mechanism 60, and the presser foot adjusting mechanism 70 drives the presser foot main driving source 10 and the two groups of presser foot mechanisms 20 to move backwards together, so that the two groups of presser foot mechanisms 20 are reset.

The following description will be given of preferred configurations of the movement transmission mechanism 60, the presser foot adjusting mechanism 70, the presser foot mechanism 20, the left-hand folding mechanism 30, and the right-hand folding mechanism 40 in the sewing mechanism.

Movement transmission mechanism 60

As shown in fig. 4, the movable driving source 50 is a motor, and a fixing frame is fixed on the upper end surface of the rear section of the platen 90, and the movable driving source 50 is fixed on the fixing frame to realize installation and fixation. The movable transmission mechanism 60 is a synchronous pulley assembly driven and operated by the movable driving source 50, the synchronous pulley assembly comprises a driving synchronous pulley 62, a driven synchronous pulley 63 and a conveying belt 61 sleeved on the peripheries of the driving synchronous pulley 62 and the driven synchronous pulley 63, the driving synchronous pulley 62 is fixed on a motor shaft of the movable driving source 50 and directly driven and rotated by the movable driving source 50, the driven synchronous pulley 63 is rotatably mounted on a fixing frame, and the lower section part of the conveying belt 61 is fixed with an adjusting frame 71 of the presser foot adjusting mechanism 70. When the moving transmission mechanism 60 rotates forward from the left view of fig. 4, the belt 61 drives the adjusting frame 71 to move forward when the belt 61 is driven to rotate anticlockwise by the driving synchronizing wheel 62 and the driven synchronizing wheel 63, so as to drive the presser foot adjusting mechanism 70, the presser foot main driving source 10 and the two groups of presser foot mechanisms 20 to move forward together; when the moving transmission mechanism 60 rotates reversely, the driving synchronizing wheel 62 and the driven synchronizing wheel 63 drive the conveying belt 61 to rotate clockwise, the conveying belt 61 drives the adjusting rack 71 to move backwards, and then drives the presser foot adjusting mechanism 70, the presser foot main driving source 10 and the two groups of the presser foot mechanisms 20 to move backwards together, so that the two groups of the presser foot mechanisms 20 can reciprocate forwards and backwards.

Presser foot adjusting mechanism 70

The presser foot adjusting mechanism 70 is used for adjusting the interval between the two sets of presser foot mechanisms 20 and driving the outer presser foot 22 and the inner presser foot 23 in the two sets of presser foot mechanisms 20 to move in the direction approaching or separating from the platen 90 at the same time.

As shown in fig. 5 and 6, the presser foot adjusting mechanism 70 includes an adjusting frame 71, an adjusting drive source 72 fixed to the left side of the adjusting frame 71, left and right lead screws 73 and 74 both rotatably mounted in the adjusting frame 71, and left and right adjusting arms 75 and 76 both movably mounted to the adjusting frame 71; the left screw rod 73 and the right screw rod 74 extend left and right and are coaxially arranged, the adjusting driving source 72 is a motor, a motor shaft of the adjusting driving source 72 is fixed with the right end of the right screw rod 74, and the left end of the right screw rod 74 is fixedly connected with the right end of the left screw rod 73 through a coupler; the left adjusting arm 75 is directly screwed with the left screw 73, the right adjusting arm 76 is directly screwed with the right screw 74, or, the left adjusting arm 75 is screwed with the left screw 73, and the right adjusting arm 76 is screwed with the right screw 74 through a sliding sleeve 710, namely: the left screw rod 73 is in threaded fit with a sliding sleeve 710 fixedly sleeved on the left adjusting arm 75, and the right screw rod 74 is in threaded fit with a sliding sleeve 710 fixedly sleeved on the right adjusting arm 76; the screw threads on the left side screw 73 and the right side screw 74 are opposite in direction; the front end of the left adjusting arm 75 is fixedly connected to the rear end of the clamp arm 21 in the left foot pressing mechanism 20, and the front end of the right adjusting arm 76 is fixedly connected to the rear end of the clamp arm 21 in the right foot pressing mechanism 20. When the adjusting drive source 72 rotates, the adjusting drive source 72 drives the left screw rod 73 and the right screw rod 74 to rotate, and then the left adjusting arm 75 and the right adjusting arm 76 move in opposite directions or in opposite directions, so as to drive the left and right groups of presser foot mechanisms 20 to move in opposite directions or in opposite directions, thereby reducing or increasing the distance between the left and right groups of presser foot mechanisms 20, realizing the distance adjustment, and meeting the sewing requirements of dark fly with different sizes.

Further, as shown in fig. 5 and 6, the left screw 73 and the right screw 74 are rotatably mounted to the adjustment frame 71 through bearings, and the left adjustment arm 75 is screw-fitted with the left screw 73 and the right adjustment arm 76 is screw-fitted with the right screw 74, so that the left adjustment arm 75 is rotatably mounted to the adjustment frame 71 through the left screw 73, the right adjustment arm 76 is rotatably mounted to the adjustment frame 71 through the right screw 74, and the left screw 73 and the right screw 74 constitute the rotation centers of the left adjustment arm 75 and the right adjustment arm 76. The adjusting frame 71 is provided with a movable driving block 77 capable of moving up and down at the rear ends of a left adjusting arm 75 and a right adjusting arm 76, the presser foot main driving source 10 is provided with two cylinders or electromagnets which are arranged left and right and are fixed on the adjusting frame 71, the output ends of the cylinders or electromagnets are fixed with the movable driving block 77 and drive the movable driving block 77 to reciprocate up and down, a supporting shaft 78 extending left and right is fixedly arranged in each movable driving block 77, and the rear ends of the left adjusting arm 75 and the right adjusting arm 76 are respectively rotatably arranged on the supporting shafts 78 in the two movable driving blocks 77. When the presser foot main driving source 10 drives the moving driving block 77 to move downwards, the moving driving block 77 drives the rear ends of the left adjusting arm 75 and the right adjusting arm 76 to move downwards, and then the front ends of the left adjusting arm 75 and the right adjusting arm 76 are tilted upwards, so that the outer presser foot 22 and the inner presser foot 23 in the two groups of presser foot mechanisms 20 are far away from the platen 90, and neither the outer presser foot 22 nor the inner presser foot 23 is pressed against cloth. When the presser foot main driving source 10 drives the movement driving block 77 to move upwards, the movement driving block 77 drives the rear ends of the left adjusting arm 75 and the right adjusting arm 76 to move upwards, and then the front ends of the left adjusting arm 75 and the right adjusting arm 76 tilt downwards, so that the outer presser foot 22 and the inner presser foot 23 in the two groups of presser foot mechanisms 20 are close to the platen 90, and the outer presser foot 22 and the inner presser foot 23 are pressed.

Preferably, as shown in fig. 6, a guide block 79 located between two moving driving blocks 77 is fixed at the lower end of the adjusting frame 71, the guide block 79 is concave and is arranged downward, guide grooves extending up and down are formed in the left and right arm portions of the guide block 79, and the end portions of the supporting shafts 78 are located in the guide grooves and are in sliding fit with the guide grooves, so that a guiding effect is achieved for up-and-down reciprocating movement of the moving driving blocks 77, the moving driving blocks 77 move stably, and therefore the stability of movement of the outer presser foot 22 and the inner presser foot 23 in the two groups of presser foot mechanisms 20 in the directions approaching or separating from the bedplate 90 is improved.

Presser foot mechanism 20

As shown in fig. 5, each of the presser foot mechanisms 20 further includes an inner presser foot lifting mechanism 25 connected between the inner presser foot 23 and the inner presser foot driving source 24, the inner presser foot driving source 24 has a telescopic driving portion capable of reciprocating left and right, the inner presser foot driving source 24 is a cylinder or an electromagnet, preferably a cylinder, and the inner presser foot driving source 24 drives the inner presser foot 23 to move in a direction away from or close to the platen 90 by the inner presser foot lifting mechanism 25, thereby realizing that the inner presser foot 23 presses against the placket 132 or the inner presser foot 23 does not press against the placket 132 when the outer presser foot 22 presses against the large cloth piece 131. The structure of the inner presser foot lifting and lowering mechanism 25 can have various structures, and the inner presser foot lifting and lowering mechanism 25 based on different structures can enable the presser foot mechanism 20 to have various embodiments. Three preferred embodiments of presser foot mechanism 20 are provided below.

As shown in fig. 7 and 8, the inner presser foot lifting mechanism 25 in the first embodiment of the presser foot mechanism 20 includes a mounting bracket 251, a support plate 252, a connecting sleeve 253, a swing pivot 259, and a swing bracket 254, the mounting bracket 251 is fixed to the outside of the clamp arm 21 by a screw, the outer end of the support plate 252 is fixed to the inside of the outer presser foot 22 by a screw, the outer end of the inner presser foot driving source 24 is rotatably mounted to the mounting bracket 251, the inner end of the telescopic driving portion of the inner presser foot driving source 24 is fixedly connected to the connecting sleeve 253, the connecting sleeve 253 is rotatably mounted to the swing bracket 254 by a shaft member extending forward and backward, the swing pivot 259 extends forward and backward and is fixed to the inner end of the support plate 252, the outer end of the swing bracket 254 is rotatably mounted to the support plate 252 by the swing pivot 259, and the inner end of the swing bracket 254 is fixed to the rear end of the inner presser foot 23 by a screw. When the telescopic driving part of the inner presser foot driving source 24 moves in a telescopic manner, the swinging bracket 254 is driven to rotate around the swinging support shaft 259 through the connecting sleeve 253, and the swinging bracket 254 drives the inner presser foot 23 to swing around the swinging support shaft 259 together by an angle, so that the inner presser foot 23 is pressed against the fly cloth 132 or the inner presser foot 23 is not pressed against the fly cloth 132.

As shown in fig. 9 and 10, the inner presser foot lifting mechanism 25 in the second embodiment of the presser foot mechanism 20 includes a mounting bracket 251 fixed to the upper end of the clamp arm 21 by a screw, and a swinging bracket 254, the outer end of the swinging bracket 254 is rotatably mounted to the inner side of the outer presser foot 22 by a shaft member extending forward and backward, one end of the inner presser foot driving source 24 is rotatably connected to the mounting bracket 251 by a pin extending forward and backward, the telescopic driving portion of the inner presser foot driving source 24 is rotatably connected to the swinging bracket 254, and the inner end of the swinging bracket 254 is fixed to the rear end of the inner presser foot 23 by a screw. When the telescopic driving part of the inner presser foot driving source 24 moves in a telescopic manner, the swinging bracket 254 is driven to rotate around the shaft member, and the swinging bracket 254 drives the inner presser foot 23 to swing around the shaft member together by an angle, so that the inner presser foot 23 is pressed against the fly cloth 132 or the inner presser foot 23 is not pressed against the fly cloth 132.

As shown in fig. 11 and 12, the inner presser foot lifting mechanism 25 in the third embodiment of the presser foot mechanism 20 includes a mounting bracket 251 fixed to the outer side of the clamp arm 21 by screws, a driving rack 255 extending from left to right, a mounting plate 256 fixed to the inner side of the outer presser foot 22 by screws, a rotation shaft 257 extending forward and backward, a driving gear 258, and a swinging bracket 254, the inner presser foot driving source 24 is fixed to the mounting bracket 251, the telescopic driving portion of the inner presser foot driving source 24 is fixed to the driving rack 255, the driving rack 255 is engaged with the driving gear 258, both front and rear ends of the rotation shaft 257 are rotatably mounted in the mounting plate 256 by bearings, the outer ends of the driving gear 258 and the swinging bracket 254 are fixed to the rotation shaft 257, and the inner end of the swinging bracket 254 is fixed to the rear end of the inner presser foot 23 by screws. When the telescopic driving part of the inner presser foot driving source 24 moves in a telescopic manner, the telescopic driving part drives the driving rack 255 to move left or right, so as to drive the driving gear 258 to rotate, and further drive the rotating shaft 257 and the swinging bracket 254 to swing together around the central axis of the rotating shaft 257 by an angle, thereby realizing that the inner presser foot 23 is pressed against the fly cloth 132 or the inner presser foot 23 is not pressed against the fly cloth 132.

In the three embodiments of the presser foot mechanism 20 described above, as shown in fig. 5, 9 or 11, the presser foot mechanism 20 includes the presser foot switching block 26, the outer end of the presser foot switching block 26 in the left-right direction is fixed to the clamp arm 21 by a screw, and the inner end of the presser foot switching block 26 in the left-right direction is fixed to the front end of the left-side adjusting arm 75 or the right-side adjusting arm 76 by a screw, thereby achieving the fixed connection of the presser foot mechanism 20 to the left-side adjusting arm 75 and the right-side adjusting arm 76.

Left-hand plaiting mechanism 30 and right-hand plaiting mechanism 40

The left cloth folding mechanism 30 is used for acting on the placket 132 to drive the placket 132 to turn left, and the right cloth folding mechanism 40 is used for acting on the placket 132 to drive the placket 132 to turn right.

As shown in fig. 7 and 8, the left folding mechanism 30 includes a right air blowing pipe 31 fixed on the left end face of the outer presser foot 22 in the right presser foot assembly, the right air blowing pipe 31 extends back and forth, the front and back ends of the right air blowing pipe 31 are respectively connected with an air pipe joint 32 and an air pipe plug 33, a plurality of left air blowing holes are formed in the right air blowing pipe 31, and an air pipe groove for accommodating the right air blowing pipe 31 is formed in the left end face of the outer presser foot 22 in the right presser foot assembly. When the outer presser foot 22 is pressed against the large cloth piece 131, the outer presser foot 22 and the right air blowing pipe 31 in the right presser foot assembly are both positioned on the right side of the placket 132, and at this time, after air is introduced into the right air blowing pipe 31, air flow is output leftwards through the air blowing holes in the right air blowing pipe 31, so that the placket 132 is driven to turn leftwards. Similarly, the right cloth folding mechanism 40 comprises a left air blowing pipe 41 fixed on the right end face of the outer presser foot 22 in the left presser foot assembly, the left air blowing pipe 41 extends back and forth, the front end and the rear end of the left air blowing pipe 41 are respectively connected with an air pipe joint 32 and an air pipe plug 33, a plurality of air blowing holes facing right are formed in the left air blowing pipe 41, and an air pipe groove for accommodating the left air blowing pipe 41 is formed in the right end face of the outer presser foot 22 in the left presser foot assembly. When the outer presser foot 22 is pressed against the large cloth piece 131, the outer presser foot 22 and the left air blowing pipe 41 in the left presser foot assembly are both positioned at the left side of the placket 132, and at this time, after air is introduced into the left air blowing pipe 41, the air blowing hole on the left air blowing pipe 41 outputs air flow rightward, so as to drive the placket 132 to turn over rightward.

When the flap 132 is folded to the left by the right air tube 31 or the flap 132 is folded to the right by the left air tube 41, there may be a phenomenon that the flap 132 is folded or uneven, and based on this, as shown in fig. 13 and 14, the left folding mechanism 30 further includes a left folding driving source 34, a left presser foot base 35, and a left folding presser foot 36 rotatably mounted to the left presser foot base 35 by a presser foot shaft 37 extending forward and backward, the left folding driving source 34 is a cylinder or an electromagnet, and the left folding driving source 34 is mounted so as to incline to the left as going downward, so that the driving portion of the left folding driving source 34 can extend obliquely downward to the left, and the left presser foot base 35 is fixed to the lower end of the driving portion of the left folding driving source 34, and is directly driven to move obliquely downward to the left by the left folding driving source 34, so that the left folding presser foot 36 can press the flap 132. When the right side air blowing pipe 31 blows air left and turns over the placket 132 left, the left folded cloth driving source 34 acts to drive the left presser foot base 35 to move obliquely and linearly leftwards and downwards, the left presser foot base 35 drives the left folded cloth presser foot 36 to move obliquely and linearly leftwards and downwards together, and the left folded cloth presser foot 36 has a stroke of moving leftwards, so when the left folded cloth presser foot 36 presses the placket 132, the placket 132 is driven to move leftwards together, thereby smoothing wrinkles on the placket 132 and realizing accurate leftward folding of the placket 132.

Similarly, as shown in fig. 13 and 14, the right cloth folding mechanism 40 further includes a right cloth folding driving source 42, a right presser foot base 43, and a right cloth folding presser foot 44 rotatably mounted on the right presser foot base 43 by a presser foot shaft 37 extending forward and backward, the right cloth folding driving source 42 is a cylinder or an electromagnet, and the right cloth folding driving source 42 is mounted obliquely so as to be inclined downward and rightward as it goes downward, so that the driving portion of the right cloth folding driving source 42 can be protruded obliquely downward and rightward, the right presser foot base 43 is fixed to the lower end of the driving portion of the right cloth folding driving source 42, and the right cloth folding presser foot 44 can be pressed against the door front cloth 132 by being directly driven by the right cloth folding driving source 42 to linearly move obliquely downward and rightward. When the left air blowing pipe 41 blows air to the right and turns over the placket 132 to the right, the right placket driving source 42 acts to drive the right presser foot base 43 to move obliquely and linearly to the right and lower directions, as shown in fig. 16 and 17, the right presser foot base 43 drives the right placket presser foot 44 to move obliquely and linearly to the right and lower directions together, and the right placket presser foot 44 has a stroke of moving to the right, so that when the right placket presser foot 44 presses the placket 132, the placket 132 is driven to move together to the right, as shown in fig. 18, wrinkles on the placket 132 are smoothed, and the placket 132 is folded to the right accurately.

Preferably, as shown in fig. 14, the presser foot shafts 37 of the left-hand folding mechanism 30 and the right-hand folding mechanism 40 are respectively sleeved with a torsion spring 38, both ends of the torsion spring 38 in the left-hand folding mechanism 30 are respectively abutted against the left-hand presser foot base 35 and the left-hand presser foot 36 to apply downward force to the left-hand presser foot 36, and both ends of the torsion spring 38 in the right-hand folding mechanism 40 are respectively abutted against the right-hand presser foot base 43 and the right-hand presser foot 44 to apply downward force to the right-hand presser foot 44. As shown in fig. 13, the left-hand folding driving source 34 in the left-hand folding mechanism 30 and the right-hand folding driving source 42 in the right-hand folding mechanism 40 are both fixedly mounted on the same support frame 120, the support frame 120 is fixed on the upper end surface of the platen 90, the left-hand folding driving source 34 and the left-hand folding presser foot 36 in the left-hand folding mechanism 30 are distributed on the right side, and the right-hand folding driving source 42 and the right-hand folding presser foot 44 in the right-hand folding mechanism 40 are distributed on the left side.

Further, the inner presser foot 23, the left cloth folding presser foot 36 and the right cloth folding presser foot 44 are all toothed presser feet, and all have a plurality of cloth pressing teeth arranged front to back. Specifically, as shown in fig. 8, the inner presser 23 includes an inner presser foot 231 and an inner presser foot 232 fixed by screws, and the rear end of the inner presser foot 231 is fixed to the swing bracket 254 by screws, thereby fixedly connecting the entire inner presser 23 to the swing bracket 254, and a plurality of cloth pressing teeth arranged in front and rear are provided on the inner end side of the inner presser foot 232 of the inner presser 23. As shown in fig. 13, the left end side of the left cloth folding presser foot 36 is provided with a plurality of cloth pressing teeth arranged front and back, and the right end side of the right cloth folding presser foot 44 is provided with a plurality of cloth pressing teeth arranged front and back. When the inner presser foot 23 and the left cloth folding presser foot 36 are pressed against the placket 132, cloth pressing teeth on the left cloth folding presser foot 36 are opposite to cloth pressing teeth on the inner presser foot 23 in the left foot pressing mechanism 20 and are arranged in a front-back collinear staggered manner; when the inner presser foot 23 and the right presser foot 44 are pressed against the fly 132, as shown in fig. 15, the presser teeth on the right presser foot 44 are arranged in a staggered manner in a manner so as to face each other and to be collinear in the front-rear direction with the presser teeth on the inner presser foot 23 in the right presser foot mechanism 20. Here, the front-back collinear staggered arrangement means that: the cloth pressing teeth on the inner presser foot 23 are positioned between two adjacent cloth pressing teeth in the left cloth folding presser foot 36 or the right cloth folding presser foot 44, and the cloth pressing teeth on the left cloth folding presser foot 36 or the right cloth folding presser foot 44 are positioned between two adjacent cloth pressing teeth in the inner presser foot 23.

Further, the working principle of the fly sewing machine with the structure when sewing the fly is as follows:

1. in the initial state, the two sets of presser foot mechanisms 20 are located at the rear side of the sewing machine head, and the outer presser foot 22 and the inner presser foot 23 of the two sets of presser foot mechanisms 20 are both tilted upward and away from the platen 90.

2. A large cloth piece 131 and a placket 132 are placed on the bedplate 90, a pedal of the placket machine is stepped on by feet, an electronic control module of the placket machine sends an instruction to the movable driving source 50 after receiving a signal, the movable driving source 50 rotates, and the presser foot adjusting mechanism 70, the presser foot main driving source 10 and the two groups of presser foot mechanisms 20 are driven to move forwards together through the movable transmission mechanism 60 until the two groups of presser foot mechanisms 20 move forwards to the sewing machine head.

3. The presser foot main driving source 10 operates to drive the movement driving block 77 to move upward, thereby driving the front ends of the left and right regulating arms 75 and 76 to tilt downward, so that the outer presser foot 22 and the inner presser foot 23 in the two sets of presser foot mechanisms 20 are moved in the direction approaching the platen 90 until the outer presser foot 22 and the inner presser foot 23 are pressed against each other. At this time, as shown in fig. 19, the inner presser feet 23 of the two sets of presser foot mechanisms 20 are respectively pressed against the left and right sides of the fly cloth 132, the outer presser feet 22 of the two sets of presser foot mechanisms 20 are respectively pressed against the large cloth piece 131, and the outer presser feet 22 of the two sets of presser foot mechanisms 20 are respectively positioned on the left and right sides of the fly cloth 132.

4. The sewing machine head sequentially sews a first section of stitch 133, a second section of stitch 134, and a third section of stitch 135 positioned on the right side of the first section of stitch 133 on the large cloth piece 131 and the placket 132, and the first section of stitch 133, the second section of stitch 134, and the third section of stitch 135 are sequentially connected as shown in fig. 1.

5. The inner presser foot driving source 24 in the two sets of presser foot assemblies operates to drive the inner presser foot 23 to rotate upwards through the inner presser foot lifting mechanism 25, so that the inner presser foot 23 is far away from the placket 132 and does not press the placket 132, but the outer presser foot 22 still presses the large cloth piece 131.

6. The left air blowing pipe 41 is filled with air, and air blowing holes on the left air blowing pipe 41 output air flow rightwards and blow the fly cloth 132 rightwards, so that the fly cloth 132 is driven to turn right; then, when the right cloth folding driving source 42 is operated to drive the right presser foot base 43 to move obliquely and linearly downward to the right, the right cloth folding presser foot 44 presses the fly 132 and drives the fly 132 to move rightward together, as shown in fig. 20. To this end, the turnup of the fly 132 along the first length of stitch 133 is completed, as shown in fig. 2.

7. The inner presser foot driving source 24 in the two groups of presser foot assemblies acts, the inner presser foot 23 is driven to rotate downwards through the inner presser foot lifting mechanism 25, at this time, the inner presser foot 23 in the left presser foot assembly is pressed and stuck on the large cloth piece 131, the inner presser foot 23 in the right presser foot mechanism 20 is pressed and stuck on the folded placket 132, and cloth pressing teeth on the inner presser foot 23 in the right presser foot mechanism 20 and cloth pressing teeth on the right presser foot 44 are opposite and are arranged in a front-back collinear staggered manner; then, the right cloth folding driving source 42 is reset, and the right cloth folding presser foot 44 is reset and is far away from the placket 132. Thus, the switching between the right cloth folding presser 44 and the inner presser 23 in the right presser mechanism 20 is completed.

8. The sewing machine head sews a tuck thread 136 on the large cloth piece 131 and the placket 132 on the right side of the first section of stitch 133 as shown in fig. 2.

9. The inner presser foot driving source 24 in the two groups of presser foot assemblies operates to drive the inner presser foot 23 to rotate upwards through the inner presser foot lifting mechanism 25, so that the inner presser foot 23 is far away from the placket 132 again and does not press the placket 132, but the outer presser foot 22 still presses the large cloth piece 131.

10. The right side air blowing pipe 31 is filled with air, and air blowing holes on the right side air blowing pipe 31 output air flow leftwards and blow the fly cloth 132 leftwards, so that the fly cloth 132 is driven to turn left; then, when the left cloth folding driving source 34 is operated to drive the left presser foot base 35 to move obliquely and linearly downward to the left, the left cloth folding presser foot 36 presses the fly 132 and drives the fly 132 to move leftward together, as shown in fig. 21. To this end, the fly 132 folded rightward in step S4 is folded leftward along the pressing line 136, as shown in fig. 3.

11. The inner presser foot driving source 24 in the two groups of presser foot assemblies acts, the inner presser foot 23 is driven to rotate downwards by the inner presser foot lifting mechanism 25, at this time, the inner presser foot 23 in the left presser foot assembly is pressed against the placket 132, the inner presser foot 23 in the right presser foot mechanism 20 is also pressed against the placket 132, and the cloth pressing teeth on the inner presser foot 23 in the left presser foot mechanism 20 are opposite to the cloth pressing teeth on the left folded cloth presser foot 36 and are arranged in a front-back collinear staggered manner; after that, the left cloth folding driving source 34 is reset, and the left cloth folding presser foot 36 is reset and is away from the fly 132. Thus, the switching between the left cloth folding presser 36 and the inner presser 23 in the left presser foot mechanism 20 is completed, as shown in fig. 22.

12. The cutter in the cutter mechanism 110 moves in a direction approaching the fly 132 to cut the fly 132 and the large cloth piece 131, and a middle cutter cut line 137 between the pressing line 136 and the three-stage stitching line 135 is formed on the fly 132 and the large cloth piece 131, as shown in fig. 3.

In summary, the present invention effectively overcomes the disadvantages of the prior art and has high industrial utility value.

The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims

1. The utility model provides a mechanism is made up in line ball that top fly machine used, includes sewing machine head, its characterized in that: the thread pressing and sewing mechanism further comprises two groups of presser foot mechanisms (20), a presser foot main driving source (10), a left cloth folding mechanism (30) and a right cloth folding mechanism (40) which are symmetrically arranged left and right; each group of presser foot mechanism (20) comprises a clamp arm (21), an outer presser foot (22) which is used for pressing and pasting a large cloth piece (131) and is fixed on the clamp arm (21), an inner presser foot (23) which is used for pressing and pasting a placket fabric (132), and an inner presser foot driving source (24) which is arranged on the clamp arm (21), wherein the inner presser foot driving source (24) is connected with the inner presser foot (23) and drives the inner presser foot (23) to move towards or away from the placket fabric (132); the presser foot main driving source (10) is connected with the clamp arm (21) and drives the outer presser foot (22) and the inner presser foot (23) to move towards or away from the large cloth piece (131) and the placket (132); the left-direction cloth folding mechanism (30) and the right-direction cloth folding mechanism (40) both act on the placket cloth (132);

The left cloth folding mechanism (30) comprises a left cloth folding driving source (34), a left presser foot base (35) which is driven by the left cloth folding driving source (34) and moves leftwards and downwards, and a left cloth folding presser foot (36) which is rotatably arranged on the left presser foot base (35) through a presser foot shaft (37), wherein the left cloth folding presser foot (36) can press and paste a placket (132); the right cloth folding mechanism (40) comprises a right cloth folding driving source (42), a right presser foot base (43) driven by the right cloth folding driving source (42) and moving downwards to the right, and a right cloth folding presser foot (44) rotatably mounted on the right presser foot base (43) through a presser foot shaft (37), wherein the right cloth folding presser foot (44) can press and paste a placket (132);

the inner pressing foot (23), the left cloth folding presser foot (36) and the right cloth folding presser foot (44) are tooth-shaped presser feet and are provided with a plurality of cloth pressing teeth which are arranged front and back; when the inner pressure foot (23) and the left cloth folding presser foot (36) are pressed against the placket (132), cloth pressing teeth on the left cloth folding presser foot (36) are opposite to cloth pressing teeth on the inner pressure foot (23) in the left foot pressing mechanism (20) and are arranged in a front-back collinear staggered manner; when the inner pressure foot (23) and the right cloth folding presser foot (44) are pressed against the placket (132), cloth pressing teeth on the right cloth folding presser foot (44) are opposite to cloth pressing teeth on the inner pressure foot (23) in the right foot pressing mechanism (20) and are arranged in a front-back collinear staggered mode.

2. The thread pressing sewing mechanism of claim 1, wherein: the automatic presser foot adjusting mechanism further comprises a movable driving source (50), a movable transmission mechanism (60) and a presser foot adjusting mechanism (70), wherein the movable driving source (50) is connected with the presser foot adjusting mechanism (70) through the movable transmission mechanism (60) and drives the presser foot adjusting mechanism (70) to reciprocate back and forth, and the presser foot main driving source (10) and the two groups of presser foot mechanisms (20) are both arranged on the presser foot adjusting mechanism (70).

3. The thread pressing sewing mechanism of claim 2, wherein: the movable driving source (50) is a motor, the movable transmission mechanism (60) is a synchronous pulley assembly driven by the movable driving source (50) to operate, and a conveying belt (61) in the synchronous pulley assembly is fixed with an adjusting rack (71) of the presser foot adjusting mechanism (70).

4. The thread pressing sewing mechanism of claim 2, wherein: the presser foot adjusting mechanism (70) comprises an adjusting rack (71), an adjusting driving source (72) fixed on the adjusting rack (71), a left screw rod (73) and a right screw rod (74) which are rotatably installed in the adjusting rack (71), and a left adjusting arm (75) and a right adjusting arm (76) which are movably installed on the adjusting rack (71), wherein the adjusting driving source (72) drives the left screw rod (73) and the right screw rod (74) to rotate, the left screw rod (73) and the right screw rod (74) are coaxially arranged and fixed, the left adjusting arm (75) is in threaded fit with the left screw rod (73), the right adjusting arm (76) is in threaded fit with the right screw rod (74), and the threaded directions on the left screw rod (73) and the right screw rod (74) are opposite; the clamp arms (21) of the two groups of presser foot mechanisms (20) are fixedly connected with the left adjusting arm (75) and the right adjusting arm (76) respectively.

5. The thread pressing sewing mechanism of claim 2, wherein: the presser foot adjusting mechanism (70) comprises an adjusting frame (71), an adjusting driving source (72) fixed on the adjusting frame (71), a left screw rod (73) and a right screw rod (74) which are rotatably installed in the adjusting frame (71), a left adjusting arm (75) and a right adjusting arm (76) which are movably installed on the adjusting frame (71), and a sliding sleeve (710) fixedly sleeved on the left adjusting arm (75) and the right adjusting arm (76) respectively, wherein the adjusting driving source (72) drives the left screw rod (73) and the right screw rod (74) to rotate, the left screw rod (73) and the right screw rod (74) are coaxially arranged and fixed, the sliding sleeve (710) on the left adjusting arm (75) is in threaded fit with the left screw rod (73), the sliding sleeve (710) on the right adjusting arm (76) is in threaded fit with the right screw rod (74), and the threaded directions on the left screw rod (73) and the right screw rod (74) are opposite; the clamp arms (21) of the two groups of presser foot mechanisms (20) are fixedly connected with the left adjusting arm (75) and the right adjusting arm (76) respectively.

6. The thread pressing sewing mechanism according to claim 4 or 5, wherein: the left adjusting arm (75) is rotatably mounted on the adjusting frame (71) through a left screw rod (73), and the right adjusting arm (76) is rotatably mounted on the adjusting frame (71) through a right screw rod (74); the adjusting frame (71) is provided with a movable driving block (77) which can move up and down and is driven to move by the main presser foot driving source (10) at the other end parts of the left adjusting arm (75) and the right adjusting arm (76), a supporting shaft (78) which extends leftwards and rightwards is fixedly arranged in each movable driving block (77), and the left adjusting arm (75) and the right adjusting arm (76) are respectively rotatably arranged on the supporting shafts (78) in the two movable driving blocks (77).

7. The thread pressing sewing mechanism of claim 6, wherein: the lower extreme of regulation frame (71) is fixed with guide block (79) that are located between two removal drive blocks (77), set up the guide way that extends from top to bottom in guide block (79), the tip of back shaft (78) is located the guide way, both sliding fit.

8. The thread pressing sewing mechanism of claim 1, wherein: each group of presser foot mechanisms (20) further comprises an inner presser foot lifting mechanism (25) connected between the inner presser foot (23) and an inner presser foot driving source (24), and the inner presser foot driving source (24) is provided with a telescopic driving part; the internal pressure foot lifting mechanism (25) comprises a mounting bracket (251) fixed on the clamp arm (21), a supporting plate (252) fixed on the outer pressure foot (22), a connecting sleeve (253) fixed at the end part of the telescopic driving part, and a swinging bracket (254) rotatably mounted on the supporting plate (252), the internal pressure foot driving source (24) is rotatably mounted on the mounting bracket (251), the connecting sleeve (253) is rotatably mounted on the swinging bracket (254), and the swinging bracket (254) and the internal pressure foot (23) are fixed.

9. The thread pressing sewing mechanism of claim 1, wherein: each group of presser foot mechanisms (20) further comprises an inner presser foot lifting mechanism (25) connected between the inner presser foot (23) and an inner presser foot driving source (24), and the inner presser foot driving source (24) is provided with a telescopic driving part; the inner pressure foot lifting mechanism (25) comprises a mounting bracket (251) fixed on the clamp arm (21) and a swinging bracket (254) rotatably mounted on the outer pressure foot (22), the inner pressure foot driving source (24) is rotatably connected with the mounting bracket (251), the telescopic driving part is rotatably connected with the swinging bracket (254), and the swinging bracket (254) and the inner pressure foot (23) are fixed.

10. The thread pressing sewing mechanism of claim 1, wherein: each group of presser foot mechanisms (20) further comprises an inner presser foot lifting mechanism (25) connected between the inner presser foot (23) and an inner presser foot driving source (24), and the inner presser foot driving source (24) is provided with a telescopic driving part; the inner pressure foot lifting mechanism (25) comprises a mounting bracket (251) fixed on the clamp arm (21), a driving rack (255) driven by an inner pressure foot driving source (24) to move left and right, a mounting plate (256) fixed on the outer pressure foot (22), a rotating shaft (257) rotatably mounted on the mounting plate (256), a driving gear (258) fixed on the rotating shaft (257), and a swinging bracket (254), wherein the driving rack (255) is meshed with the driving gear (258), and two ends of the swinging bracket (254) are respectively fixed with the rotating shaft (257) and the inner pressure foot (23).

11. The thread pressing sewing mechanism of claim 1, wherein: the left cloth folding mechanism (30) comprises a right side air blowing pipe (31) fixed on the left end face of an outer presser foot (22) in the right side presser foot assembly, two ends of the right side air blowing pipe (31) are respectively connected with an air pipe joint (32) and an air pipe plug (33), and a plurality of left-facing air blowing holes are formed in the right side air blowing pipe (31); the right cloth folding mechanism (40) comprises a left side air blowing pipe (41) fixed on the right end face of the outer presser foot (22) in the left side pressure foot assembly, two ends of the left side air blowing pipe (41) are respectively connected with an air pipe joint (32) and an air pipe plug (33), and a plurality of right-facing air blowing holes are formed in the left side air blowing pipe (41).

12. The thread pressing sewing mechanism of claim 1, wherein: the presser foot shaft (37) is sleeved with a torsion spring (38), two ends of the torsion spring (38) in the left cloth folding mechanism (30) are respectively abutted with the left cloth folding presser foot base (35) and the left cloth folding presser foot (36), and two ends of the torsion spring (38) in the right cloth folding mechanism (40) are respectively abutted with the right cloth folding presser foot base (43) and the right cloth folding presser foot (44).

13. A line pressing and sewing method for a placket machine is characterized in that: use of a thread-pressing sewing mechanism according to any one of claims 1 to 12, the thread-pressing sewing method comprising the following steps in order:

s1, placing a placket (132) at a preset position on a large cloth piece (131), enabling a presser foot main driving source (10) to act, driving an outer presser foot (22) and an inner presser foot (23) to move towards a direction approaching the large cloth piece (131) and the placket (132), respectively pressing the inner presser foot (23) in two groups of presser foot mechanisms (20) on the left side and the right side of the placket (132), and respectively pressing the outer presser foot (22) in the two groups of presser foot mechanisms (20) on the large cloth piece (131);

s2, the sewing machine head sequentially sews a first section of suture (133) and a third section of suture (135) positioned on the right side of the first section of suture (133) on the large cloth piece (131) and the placket (132);

s3, an inner presser foot driving source (24) in the presser foot mechanism (20) acts to drive the inner presser foot (23) to move in a direction away from the placket (132);

s4, the right cloth folding mechanism (40) acts to enable the placket (132) to be folded rightwards along the first section of stitching (133);

s5, an inner pressure foot driving source (24) in the presser foot mechanism (20) acts to drive the inner pressure foot (23) to move towards the direction close to the fly cloth (132), and the inner pressure foot (23) in the right pressure foot mechanism (20) is pressed and stuck on the folded fly cloth (132);

S6, the sewing machine head is used for sewing a pressing line (136) positioned on the right side of the first section of stitching line (133) on the large cloth piece (131) and the placket (132).

14. A fly frame comprising a frame (80) and a platen (90) fixed to the frame (80), characterized in that: the sewing machine further comprising the thread pressing sewing mechanism of any one of claims 1-12, wherein the sewing machine head, the presser foot mechanism (20), the left-hand plaiting mechanism (30), and the right-hand plaiting mechanism (40) are all mounted above the platen (90).

15. The fly machine as claimed in claim 14, wherein: the device also comprises a cutter mechanism (110), wherein the cutter mechanism (110) is arranged above the bedplate (90), and the cutter mechanism (110) is provided with a cutter which can move towards or away from the placket (132).

16. A method for sewing a top fly is characterized in that: the fly sewing method using the fly machine of claim 15, comprising the steps of, in order:

S2, a sewing machine head sequentially sews a first section of suture (133) and three sections of suture (135) positioned on the right side of the first section of suture (133) on a large cloth piece (131) and a placket (132);

s6, sewing a pressing line (136) positioned on the right side of the first section of the stitch (133) on the large cloth piece (131) and the placket (132) by the sewing machine head;

s7, an inner presser foot driving source (24) in the presser foot mechanism (20) acts to drive the inner presser foot (23) to move in a direction away from the placket (132);

s8, the left folding mechanism (30) acts to enable the placket (132) folded rightwards in the step S4 to be folded leftwards along the pressing line (136);

s9, an inner pressure foot driving source (24) in the presser foot mechanism (20) acts to drive the inner pressure foot (23) to move towards the direction close to the placket cloth (132), and the inner pressure feet (23) in the two groups of presser foot mechanisms (20) are respectively pressed against the placket cloth (132);

S10, a cutter in the cutter mechanism (110) moves towards a direction close to the fly cloth (132), the fly cloth (132) and the large cloth piece (131) are cut, and a middle cutter cutting line (137) positioned between a pressing line (136) and three sections of stitching lines (135) is formed on the fly cloth (132) and the large cloth piece (131).