TWI780736B - Presser foot device of overlock sewing machine - Google Patents

Abstract

A presser foot device of overlock sewing machine includes a swing mechanism, a pressure cloth mechanism and a pressure rod mechanism. The overlock sewing includes a body. The body having an axle joint hole, a fixed hole and a pressure bar hole. The swing mechanism having a swing element. The swing element is pivoted to the axle joint hole. The pressure cloth mechanism having a press arm and a pressing foot connected to the press arm. The press arm is connected to the swing element. The pressure rod mechanism includes an actuator and a pressure rod assembly. The actuator is pierced in the fixed hole and having a telescopic rod. The telescopic rod is connected to the pressure rod assembly. The pressure rod assembly penetrates the pressure bar hole to connect the press arm.

Description

Presser foot device of Coker sewing machine

The invention relates to the technology of a cocker sewing machine, especially a presser foot device of a cocker sewing machine.

The presser foot device of the existing koke sewing machine mainly includes a swing mechanism, a cloth pressing mechanism and a pressing bar mechanism, wherein the cloth pressing mechanism includes a pressing arm and a presser foot, and the pressing bar mechanism passes through the sewing machine body, and it includes A knob, a spring, a cylindrical tube and a pressure rod, the cylindrical tube is connected to the pressure rod, the spring is elastically clamped between the knob and the cylindrical tube, and the pressure of the presser foot on the object to be sewn is fully determined. Depends on how hard the knob is pressing against the spring. In addition, a presser foot lifting device is installed around the sewing machine body, and the presser foot device can be lifted by turning it manually.

However, the presser foot device of the existing koke sewing machine is still not perfect in actual use, because it is lifted by manual turning, it is necessary to make and assemble these associated components or mechanisms in addition, which not only has components In addition to the material cost and production cost, there is also the assembly cost, which will make the overall cost unable to be effectively controlled. In addition, the spring is used to change the pressure of the presser foot and cannot be digitized. Furthermore, the lifting height of the presser foot is limited by the surrounding components and cannot be effectively amplified, so it is not suitable for sewing some thick fabrics.

In view of this, the present inventor aimed at the above-mentioned deficiencies in the prior art, devoted himself to research and combined with the application of theories, and tried his best to solve the above-mentioned problems, which became the goal of the inventor's improvement.

An object of the present invention is to provide a presser foot device of a kecker sewing machine, which can not only simplify the overall structure of the presser foot device, but also increase the lifting height of the presser foot.

In order to achieve the above object, the present invention provides a presser foot device of a cocker sewing machine. The cocker sewing machine includes a body, and the body is provided with a shaft connection hole, a fixing hole and a pressure bar hole. The presser foot device includes A swing mechanism, a cloth pressing mechanism and a pressing rod mechanism, the swing mechanism has a swing piece, and the swing piece is pivotally connected to the shaft connection hole; the cloth pressing mechanism has a pressing arm and is connected to the pressing arm A presser foot at one end of the arm, the other end of the pressing arm is connected to the swing member; the pressing rod mechanism includes an actuating element and a pressing rod assembly, the actuating element is passed through the fixing hole, and the actuating The moving element has a telescopic rod, which is connected to one end of the pressing rod assembly, and the other end of the pressing rod assembly passes through the pressing rod hole to connect the pressing arm; wherein the telescopic movement of the telescopic rod , so that the pressing arm and the presser foot can be lifted or pressed together.

The present invention also has the following effects. With the arrangement of the universal joint, the concentricity deviation between the telescopic rod, the central shaft and the pressure rod can be tolerated, so that the assembly becomes simpler and easier. With the setting of the actuating element, the lifting height of the presser foot can be increased from the existing 7mm to more than 10mm while maintaining the same body structure, so that it can be applied to the sewing of fabrics of various thicknesses. By adjusting the pressure of the pressure regulating valve, the pressure of the presser foot can be digitized. Material costs, production costs and assembly costs of related components such as manual turning can be largely omitted.

The detailed description and technical content of the present invention are described below with the drawings, but the attached drawings are only for reference and description, and are not used to limit the present invention.

Please refer to Fig. 1 to Fig. 4, the present invention provides a presser foot device of a cocker sewing machine, the cocker sewing machine 8 includes a body 81, and the body 81 is provided with a shaft connection hole 82, a fixing hole 83 and a The presser hole 84 and the presser foot device 1 mainly include a swing mechanism 10 , a cloth presser 20 and a presser bar 30 .

The swing mechanism 10 mainly includes a swing member 11, a link assembly 12 and a torsion spring 13. The swing member 11 mainly includes a shaft 111, a longitudinal arm 112 connected to the end of the shaft 111 and a longitudinal arm 112 connected to the end of the longitudinal arm 112. A transverse arm 113, the shaft 111 is pivotally connected in the aforementioned shaft connection hole 82, the longitudinal arm 112 is arranged perpendicular to the shaft 111, the transverse arm 113 is arranged parallel to the shaft 111, and the shaft 111 is pivotally connected to the shaft After the hole 82 is reversed, the longitudinal arm 112 and the transverse arm 113 will swing back and forth. The connecting rod assembly 12 is sleeved on the end of the shaft rod 111 away from the longitudinal arm 112, and mainly includes a connecting rod 121 and a beam ring 122, which are used to provide a knee lifter (not shown in the figure) When the connecting rod 121 is turned downward, it drives the tie ring 122 to move together, and when the connecting rod 121 is turned upward, it swings independently. The torsion spring 13 is sleeved on the shaft 111 and one end of the torsion spring is hooked on the connecting rod 121 to provide a return force after the connecting rod 121 is turned.

The cloth pressing mechanism 20 mainly includes a pressing arm 21, a presser foot 22 and a latch 23. One end of the pressing arm 21 is connected to the aforementioned transverse arm 113 through the latch 23, and the presser foot 22 is connected to the pressing arm 21 away from the transverse arm. 113 at one end. A clamped section 211 is disposed on a region of the pressing arm 21 adjacent to the presser foot 22 .

The pressing rod mechanism 30 mainly includes an actuating element 31 and a pressing rod assembly 34. The actuating element 31 in this embodiment is a pneumatic cylinder, but it is not limited to this type, and it passes through a first sleeve 38. It is connected to the aforementioned fixing hole 83, and two oil stop collars 831 are sheathed on the outer periphery of the first sleeve 38 to prevent leakage of lubricating oil inside. The pneumatic cylinder 31 mainly includes a cylinder body 32 and a telescopic rod 33 connected to the cylinder body 32. After the gas is input or output inside the cylinder body 32, the telescopic rod 33 can be telescopically moved relative to the cylinder body 32. An end far away from the cylinder body 32 is provided with an external thread 331 and a nut 332 screwed to the external thread 331 .

The pressing rod assembly 34 mainly includes a central shaft 35, a universal joint 36 and a pressing rod 37. The central shaft 35 has a polygonal rod segment 351 and a circular rod segment 352 extending from the polygonal rod segment 351. In the polygonal rod segment 351 A screw hole 353 is provided on the end surface of the screw hole 353, and the screw hole 353 is used to be screwed to the aforementioned external thread 331, and to be locked tightly through the nut 332. An end of the circular rod section 352 away from the polygonal rod section 351 is provided with a buckle groove 354 .

The universal joint 36 mainly includes a cap 361, a plurality of gaskets 362, a plurality of O-rings 363 and a buckle 364, the cap 361 is sleeved on the aforementioned circular rod section 352, one O-ring 363 and each pad The piece 362 is accommodated inside the cap 361 and sleeved with the circular rod section 352, and then the buckle 364 is fastened to the corresponding buckle groove 354. At this time, the O-ring 363 and each gasket 362 are clamped on the cap 361. and the buckle 364; then, another O-ring 363 is sleeved on the outer peripheral edge of the buckle groove 354 of the circular rod section 352, wherein the cap 361 is screwed on one end of the pressing rod 37, so that the other An O-ring 363 is clamped between the buckle 364 and the pressing rod 37 . Each O-ring 363 is made of soft material, which can be an elastic body.

The pressure rod 37 is connected to the aforementioned pressure rod hole 84 through a second sleeve 39, and it is provided with an external thread 371 for the cap 361 to be screwed. The clamping fork 372 is connected to the clamped section 211 corresponding to the aforementioned pressing arm 21 .

Further, the presser foot device 1 of the present invention also includes a pressure regulating valve 40, and the pressure regulating valve 40 communicates with the aforesaid actuating element 31 through two air delivery pipes 50, so as to adjust the pressure of the pressure regulating valve 40 so that the aforesaid pressure can be adjusted. The pressure of the foot 22 can be digitized.

Please refer to Fig. 5 and Fig. 6, during use, through the actuation of the actuating element 31 to the pressing rod assembly 34, when the telescopic rod 33 moves downward, the pressing rod 37 will hold the fork 372 against the pressing arm 21 does the action of pressing down; On the contrary, when telescoping link 33 moves upwards, pressing rod 37 will be lifted upwards together with pressing arm 21 and presser foot 22.

In summary, the presser foot device of the present invention can indeed achieve the expected purpose of use, and solve the lack of conventional knowledge, and because of its novelty and progress, it fully meets the requirements of the invention patent application, according to the patent law To file an application, please check carefully and grant the patent of this case to protect the rights of the inventor.

1: Presser foot device

10: Swing mechanism

11: Oscillating piece

111: shaft

112: longitudinal arm

113: transverse arm

12: Connecting rod assembly

121: Connecting rod

122: beam ring

13: torsion spring

20: Cloth pressing mechanism

21: Press arm

211: Clamped section

22: Presser foot

23: Latch

30: Press rod mechanism

31: Actuation element

32: Cylinder

33: telescopic rod

331: External thread

332: Nut

34: Pressure rod assembly

35:Axis

351:Polygon pole segment

352: round rod segment

353: screw hole

354: buckle slot

36: universal joint

361: cap

362: Gasket

363: O-ring

364: buckle

37: pressure rod

371: External thread

372: Gripping Fork

38: First sleeve

381: oil stop collar

39: Second sleeve

40: pressure regulating valve

50: air pipe

8: Cocker sewing machine

81: Body

82: shaft connection hole

83: Fixing hole

84: Pressure rod hole

Fig. 1 is the appearance diagram of the combination of the presser foot device of the present invention installed on the koke sewing machine.

Fig. 2 is a three-dimensional view of the swing mechanism, the cloth pressing mechanism and the pressing rod mechanism of the present invention.

Fig. 3 is an exploded view of the pressing rod mechanism of the present invention.

Fig. 4 is a combined side view of the swing mechanism, the cloth pressing mechanism and the pressing rod mechanism of the present invention.

Fig. 5 is a partial sectional view of the presser foot device of the present invention for pressing downwards.

Fig. 6 is a partial cross-sectional view of the upward lift of the presser foot device of the present invention.

30: Press rod mechanism

31: Actuation element

32: Cylinder

33: telescopic rod

331: External thread

332: Nut

34: Pressure rod assembly

35:Axis

351:Polygon pole segment

352: round rod segment

353: screw hole

354: buckle slot

36: universal joint

361: cap

362: Gasket

363: O-ring

364: buckle

37: pressure rod

371: External thread

372: Gripping Fork

38: First sleeve

381: oil stop collar

39: Second sleeve

Claims (9)

A presser foot device of a koke sewing machine, the koke sewing machine includes a body, the body is provided with a shaft connection hole, a fixing hole and a presser hole, the presser foot device includes: a swing mechanism with a swing piece , the swinging member is pivotally connected to the shaft connection hole; a cloth pressing mechanism has a pressing arm and a presser foot connected to one end of the pressing arm, and the other end of the pressing arm is connected to the swinging member and a pressing rod mechanism, including an actuating element and a pressing rod assembly, the actuating element is passed through the fixing hole, and the actuating element has a telescopic rod, and the pressing rod assembly includes a central shaft, a universal joint and a pressing rod, the telescopic rod is connected to one end of the central shaft, the other end of the central shaft is movably connected to one end of the pressing rod through the universal joint, and the other end of the pressing rod is passed through the pressing rod The hole is used to connect the pressing arm; through the telescopic movement of the telescopic rod, the pressing arm and the presser foot can be lifted or pressed together. The presser foot device of the Coker sewing machine as described in claim 1, wherein the universal joint includes a cap, a plurality of gaskets, an O-ring and a buckle, the central shaft has a circular rod section, and the circular The rod section is provided with a buckle groove, the cap is sleeved on the circular rod section and fixed on the pressure rod, the O-ring and each of the gaskets are sleeved on the circular rod section, and the buckle corresponds to the buckle The groove snaps in and holds the O-ring and each of the spacers between the cap and the tab. The presser foot device of the Coker sewing machine as described in claim 2, wherein the universal joint further includes another O-ring, and the other O-ring is sleeved on the circular rod section and clamped on the between the buckle and the bar. According to claim 2, the presser foot device of a cocker sewing machine, wherein the O-ring is an elastic body. The presser foot device of a cock sewing machine as claimed in claim 1, wherein the actuating element is a pneumatic cylinder. According to claim 5, the presser foot device of a cocker sewing machine further includes a pressure regulating valve, and the pressure regulating valve is connected to the pneumatic cylinder through two air delivery pipes. The presser foot device of the Coker sewing machine as described in Claim 1, wherein the central shaft has a polygonal rod section and a circular rod section extending from the polygonal rod section, and a screw hole is provided on the end surface of the polygonal rod section, The telescopic rod is provided with an external thread, and the external thread is screwed corresponding to the screw hole. According to claim 1, the presser foot device of a koke sewing machine, wherein the pressing rod is provided with a clamping fork, the pressing arm has a clamped section, and the clamping fork is connected corresponding to the clamped section. The presser foot device of the coker sewing machine as described in claim 1, wherein the telescopic rod is connected to the fixing hole through a first sleeve, and the pressing rod assembly includes a pressing rod, and the pressing rod passes through a second The sleeve is threaded and combined with the pressure rod hole.

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