KR20090000396U - Automatic yarn cutting device of sewing machine - Google Patents

Abstract

The present invention relates to an automatic trimming control mechanism of a sewing machine, the main configuration of the bracket, the trimming knife drive device, the mounting force regulator release device and the pressure cylinder member, the bracket is a side of the sewing machine head so that each member can be assembled and assembled When the pneumatic cylinder operates the trimming drive device, the trimming knife connecting rod drives the moving knife to cut the sewing thread, and the trimming knife drive device also drives the cam by using the interlocking rod at the same time. The force regulator release device slows down the thread tension regulator while catching the sewing thread according to the movement of the moving knife in a timely manner, and the upper sewing thread is provided with a tension margin to operate the trimming knife drive device.

Description

Automatic trimming control mechanism of sewing machine {AUTOMATIC YARN CUTTING DEVICE OF SEWING MACHINE}

The present invention relates to an automatic trimming control mechanism of a sewing machine, and more particularly, to a control mechanism for effectively controlling the operation of a trimming knife driving device and a mounting force regulator release device.

As is known, a sewing machine having an automatic trimming function, when controlling the operation of the trimming knife, has to fit with the timing when the thread tensioner slows down the thread, and the trimming knife catches the sewing thread so that a proper extension margin is created in the sewing thread. It can be cut while being pulled by the hook of the hook.

Currently, the sewing machine with automatic trimming function is divided into two designs in the power source part of the trimming knife control mechanism and the tension regulator release mechanism. Firstly, the trimming knife control mechanism and the tensioning force release mechanism have their own independent power sources. Such a design must be adjusted and calibrated innumerably repeatedly, and when the trimming knife breaks the thread and the tensioning force slows the thread. This adjustment procedure is complicated and time consuming because it can be adjusted. The second method is to drive the trimming knife control mechanism and the tension regulator release mechanism with a single power source. The drawback of this structure is that the thread release shaft swing of the tension regulator release mechanism is determined after the stroke of the trimming knife is confirmed. It becomes fixed and impossible to adjust, so that there is a slight error in the time that the tensioner slows down the thread.

Therefore, the present invention adopts a structure driven by a single power source and proceeds to a new improvement, and when the thread cutting knife breaks the thread and the thread tension regulator slows the thread together, it can be made smoothly. The tension regulator makes it simpler and faster to control when the thread is released.

An object of the present invention is to provide a design for the automatic trimming control mechanism of the sewing machine, when the single sewing stroke of the sewing machine is finished, the automatic cutting device is smoothly driven to automatically cut the thread, and The thread tension controller is to make the trimming work more smoothly by delaying the thread in a timely manner according to the thread cutting work.

A second object of the present invention is to provide a design for an automatic trimming control mechanism of a sewing machine, and to simultaneously drive a trimming knife driving device and a mounting force regulator release device through an interlocking lever installed on the bracket by the pressure cylinder. .

According to the present invention, in the automatic trimming control mechanism of the sewing machine, as a bracket installed on the side of the sewing machine head, the interlocking rod is fitted inside the body, the fixing sheet is fixedly connected to the outer portion, and the bracket is supported on the inner bottom of the body Is installed vertically, each of the cam and the operating lever is fixed to the end of each side of the interlocking rod located on the outside of the body, and the bracket is separately fitted to the end of the operating lever is fixed in the interlocking rod; A trimming knife drive device consisting of a push rod, a swing lever, and a trimming knife connecting rod, wherein a bar is fixedly connected to one end of a push rod, the other end is pivotally connected to a swing lever, and the other end of the swing lever is a trimming knife connecting rod and a pivot. Is connected, the other end of the cutting knife connecting rod is a cutting knife drive device axially connected to the moving cutting knife; A tension regulator release device consisting of a swing lever, a roller, and a pull rod, wherein the lever body of the swing lever is axially connected to be movable and positioned at an upper end of the support, and both ends of the swing lever are respectively a roller and a pull. A tension regulator release device which is provided so that the rod bottom end is pivotally connected and fixed, and that brakes are applied to the thread slowing operation of the tension regulator while the tip of the full rod is engaged; And a pressure cylinder providing a power source of the trimming knife driving device and the mounting force regulator release device, wherein the pressure cylinder is connected to the fixed seat, and a crossbar is connected to an axial lever end of the front end of the pressure cylinder, and the crossbar is operated. And a pneumatic cylinder inserted into and coupled to the pneumatic cylinder, wherein the axial lever of the pneumatic cylinder moves in the lateral direction while moving the interlocking rod through the operation lever, thereby causing the interlocking rod to be trimmed. It is characterized in that to drive the drive device and the mounting force regulator release device at the same time.

As described above, according to the present invention by adopting a structure driven by a single power source, when the thread cutting knife breaks the thread and the mounting force adjuster slows down the thread to match each other, the mounting force regulator The timing of the slowing down operation of the machine can be adjusted more simply and quickly.

Hereinafter, with reference to the accompanying drawings and embodiments will be described in detail the structural features and other operations, purposes of the present invention.

As shown in Figures 1 to 4, the automatic trimming control mechanism design of the sewing machine of the present invention is the bracket (1), the trimming knife drive device (2), the tension adjusting device release device (3) and the air pressure cylinder (4) The main configuration includes the assembly. Bracket (1) is a mounting table mounted in a substantially U-shape on the side of the sewing machine head 10, one interlocking rod 11 is fitted horizontally inside the mounting table, the fixing sheet 12 is fixedly connected to the outer portion In addition, the bracket 1 has a support 13 installed vertically at the inner bottom of the body, and the interlocking rod 11 has a back spring 14 and a back up ring ( 15 is fitted, the cam 16 and the operating lever 17 is fixed to the end of each side of the interlocking rod (11) located outside the body of the bracket (1), the operating lever (17) of the interlocking rod (11) One bar (18) is fitted separately at the portion where the end of the) is fixed.

The cutting knife driving device 2 is composed of a push rod 21, a swing lever 22, and a cutting knife connecting rod 23. The bar 18 is fixedly connected to one end of the push rod 21, the other end is pivotally connected to the swing lever 22, and the lever body of the swing lever 22 is pivotally connected to the sewing machine head 10 so as to be movable. And one end thereof is pivotally connected to the trimming knife connecting rod 23, and the other end of the trimming knife connecting rod 23 is axially connected to the moving trimming knife 5.

The mounting force regulator release device 3 is composed of a swing lever 31, a roller 32, and a pull rod 33, and is axially connected to allow the lever body of the swing lever 31 to move, It is positioned at the upper end, and both ends of the swing lever 31 are provided so that the lower ends of the roller 32 and the pull rod 33 are pivotally connected, respectively, and the tip of the pull rod 33 is engaged. Braking is applied to the thread slowing action of the tension regulator.

The pressure cylinder (4) provides a power source for the trimming knife drive device (2) and the mounting force regulator release device (3), and the pressure cylinder (4) is horizontally connected to the fixed seat (12), and the pressure cylinder (4). The crossbar 42 is radially connected to the end of the axial lever 41 at the front end, so that the crossbar 42 is inserted into the actuating lever 17, and the pressure cylinder 4 has the axial lever 41 at the rear end. The cushioning rubber gasket 43 and the seat ring 44 are fitted to the body, and the work ring of the axial lever 41 is adjusted and fixed by the seat ring 44, and the buffer rubber gasket 43 is fixed. The silver axial lever 41 can reduce the impact force with the pressure cylinder 4 body during the operation stroke.

Using the member, when the axial lever 41 of the air pressure cylinder 4 moves the linkage rod 11 through the actuating lever 17 and the position is moved in the transverse direction, on the other hand, the linkage rod (11) drives the trimming knife drive device (2) through the bar 18 so that the moving knife 5 cuts the sewing thread proceeds, on the other hand the cam 16 and the roller 32 By appropriately supporting and pushing, the swing lever 31 drives the pull rod 33 so that the mounting tension controller delays the upper sewing thread in a timely manner, so that the moving blade 5 can pull the upper sewing thread in tension. Will be produced.

In addition, as shown in Figures 5 and 6, in order to ensure that the overall operation of the trimming knife driving device 2 and the mounting force regulator release device (3) cooperatively, the present invention is a pressure cylinder (4) Trimmer knife driving device by installing a single bar 18 in the interlocking portion of the drive device 2 so that the bar 18 is properly adjusted in the axial direction from the rod body of the linkage rod 11. The interlocking angle of (2) was made smooth and certain. In addition, the cam 16, which is connected to the other end of the interlocking rod 11, may also be adjusted in the axial direction as appropriate in the rod body of the interlocking rod 11 as well. In this way, the time when the cam 16 pushes the roller 32 is adjusted precisely, and when the moving knife 5 catches and rotates the sewing thread, the mounting force adjuster timely slows down the upper sewing thread.

Next, since the interlocking spring 11 and the backing ring 15 are installed in the body of the rod in the body of the bracket 1, the interlocking rod 11 is a pressure cylinder (4). When the position is moved in the axial direction by the backup ring 15 is moved horizontally along it, while the backup ring 15 stores the energy while pressing the abdominal spring 14 (see FIG. 7). . The stored energy can provide the power required when the linkage rod 11 returns, and when the linkage rod 11 returns, the trimming knife drive device 1 and the mounting force regulator release device 3 are restored. Since it is pulled as much as possible, the amount of power required is also determined by the position adjustment of the backup ring 15.

However, the above description is only limited to the preferred embodiment of the present invention, and thus the present invention cannot be limited to the scope of the present invention, and thus, a simple or equivalent effect or change based on the patent application scope and the present invention specification of the present invention or In the case where the equation is added, it turns out that it belongs to the utility model registration scope of the present invention.

In summary, the automatic trimming control mechanism of the sewing machine of the present invention has the effect that the sewing machine drives the moving trimmer and at the same time slows down the sewing thread, the overall structure and the arrangement are simple, and therefore, the effect must be enhanced. Since the operation of the means is also original and novel and meets the requirements of the utility model, the utility model registration is filed in accordance with the law.

1 is a three-dimensional view of the present invention combined with a sewing machine,

2 is an exploded three-dimensional view of the present invention,

3 is a combination stereoscopic view of the present invention,

Figure 4 is a combination three-dimensional view of the present invention from another angle,

Figure 5 is a plan view combination structure in a state looking down the present invention,

Figure 6 is a local combination cross-sectional view of the mounting force regulator release device of the present invention and

7 is an operation of the mounting force regulator release device of the present invention.

* Explanation of symbols for the main parts of the drawings

1: base 2: trimmer knife drive 3: tension adjuster release device

4: pressure cylinder 5: movable trimmer 10: sewing machine head

11: linkage rod 12: fixing sheet 13: support

14: Abdominal spring 15: Backup ring 16: Cam

17: operating lever 18: bar 22: swing lever

23: trimming knife connecting rod

32: roller 33: pull rod 41: axial lever

42: crossbar 43: cushioning rubber gasket 44: positioning ring

A: thickness

Claims (4)

In the automatic thread trimming control mechanism of the sewing machine, A bracket is installed on the side of the sewing machine head, the interlocking rod is fitted inside the body, the fixing sheet is fixedly connected to the outer portion, and the bracket is installed vertically on the inner bottom of the body, both sides of the interlocking rod located outside the body A cam and an actuating lever fixedly installed at each end of the bracket, and a bracket to which a bar is separately inserted at an end of the interlocking rod to which the actuating lever is fixed; A trimming knife drive device consisting of a push rod, a swing lever, and a trimming knife connecting rod, wherein a bar is fixedly connected to one end of a push rod, the other end is pivotally connected to a swing lever, and the other end of the swing lever is a trimming knife connecting rod and a pivot. Is connected, the other end of the cutting knife connecting rod is a cutting knife drive device axially connected to the moving cutting knife; A tension regulator release device comprising a swing lever, a roller, and a pull rod, wherein the lever body of the swing lever is axially connected to be movable and positioned at an upper end of the support, and both ends of the swing lever are respectively a roller and a pull rod. The lower end is provided to be pivotally connected to the fixed position, the tension regulator release device that is controlled by applying a brake to the thread slowing operation of the tension regulator while engaging the tip of the pull rod; And An air pressure cylinder providing a power source of the trimming knife driving device and the mounting force regulator release device, the air pressure cylinder is connected to the fixed seat, a crossbar is connected to the axial lever end of the air pressure cylinder front end portion, and the crossbar is connected to the operating lever. A pneumatic cylinder inserted therein; By using the member, an operation occurs in which the axial lever of the pressure cylinder moves the position in the lateral direction while moving the linkage rod through the actuating lever, whereby the linkage rod simultaneously drives the trimming knife drive device and the mounting force regulator release device. Automatic trimming control mechanism of the sewing machine, characterized in that driven. The method of claim 1, The interlocking lever is an automatic trimming control mechanism of a sewing machine, characterized in that the abdominal spring and the backup ring is fitted in the bracket body. The method of claim 1, Body of the swing lever is axially connected so as to move the automatic trimming control mechanism of the sewing machine, characterized in that fixed to the head of the sewing machine. The method of claim 1, The pressure cylinder is an automatic trimming control mechanism of a sewing machine, characterized in that the cushioning rubber gasket and the positioning ring are fitted to the axial lever body of the rear end.

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