KR970006667Y1 - Device for cutting an edge of a cloth - Google Patents

Abstract

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Description

Edge cloth cutting device of sewing machine

1 is an exploded perspective view of the present invention

2 is a perspective view of a coupled state of the present invention

3 (a) (b) is a front view of the operating state of the present invention

4 (a) is a rear view showing the state of use of the cutter.

(B) is a rear view showing the disengaged state of the cutter

5 is a cross-sectional view taken along line A-A and B-B of FIG.

* Description of the symbols for the main parts of the drawings *

10: presser foot support 20: needle support

30: presser foot body 31: ascending liver

32: dovetail 40: cutter body

40H: Cutter 41: protrusion

42: dovetail groove 43: lifting guide home

44: locking hole 50: link assembly

51: the first link 52: the second link

52A: protrusion 52B: bearing

52H, 54H: housing 53: round cap

54: engaging bar 54F: flange

54S: Compression Spring 55: Partial Tap Bolt

60: needle plate 62: cutter blade groove

The present invention relates to an edge cloth cutting device of a sewing machine, and in particular, to be installed between the presser foot support and the needle support, avoiding a complicated structure elongated to receive power from a separate power or driving source, thereby simplifying the reduction and installation of the device. And it relates to an edge fabric cutting device of the sewing machine made easy to use.

Cutting the edge of the fabric together with sewing during the sewing operation is advantageous in the sewing process because no separate cutting process of the edge fabric. Therefore, the function of cutting the edge fabric of the sewing machine is provided, which is usually a method of drawing power from the drive unit inside the sewing machine body is not only the structure is complicated, but also the assembly of the components for drawing power inside the sewing machine body The self-assembly process is only complicated.

Therefore, in the situation in which two sewing machines, such as a sewing machine with a cutting device for cutting the edge fabric and a sewing machine without a sewing machine, are manufactured and spread, for example, a user having a general sewing machine without the compatibility of parts such as a needle plate, the sewing machine having a separate cutting device for the edge fabric There is a double burden that must be purchased.

Therefore, the present invention has been made in view of the above problems, and provides a device that can be easily attached and assembled to a general sewing machine, so that the general sewing or cutting of the edge fabric of the sewing machine can be simultaneously performed as needed. The object is to provide a device.

In order to achieve the above object, the present invention forms a vertical dovetail on one side of the presser foot body to which the presser foot support is fixed, and has a lifting edge for cutter release on the rear side, and at the same position as the dovetail of the cutter body on which the cutter is installed. Lifting force of the needle support having a sewing needle at the bottom having a dovetail groove and a lifting guide groove having a locking hole at the top in the vertical direction of the front and the lifting interval at the rear thereof, the lifting section having a bottom portion It comprises a power transmission means having a locking rod means for transmitting to the cutter body. Next, the attached drawings will be described in more detail. 1 is a separate perspective view of the present invention has a dovetail 32 in the vertical direction in the vertical direction on one side of the body 30 having a presser foot at the bottom, and the cutter lift interval 31 having an elastic force upward by a torsion spring on the rear side. Install. And a dovetail groove 42 in which the dovetail 32 is formed is formed on one side of the cutter body 40 which has two cutters 40K screwed to the needle support 20 side and the rear side. A horizontal long hole 40H is formed on the needle support 20 side of the coupling portion 40K of the cutter 40K so that the cutter 40K can be horizontally adjusted back and forth on the cutter body 40. This is to adjust the fine spacing appropriate to the edge of the cutter blade groove 62 of the needle plate (60).

In addition, a lifting guide groove 43 is formed on the front of the cutter body 40 in the vertical direction, and a locking hole 44 is formed on the upper bottom of the guide groove 43. The protrusion 41 is formed to receive the cutter lift interval 31. And when looking at the link assembly 50 connected to the needle support 20 and the cutter body 40 and the presser foot support 10, the protrusion (1) on one side lining the oilless bearing (52B) to the inner diameter of the housing (52H) The hole of the protrusion 52A has a locking rod 54 in the protrusion 52A of the second link 52 having the 52A, which protrudes with the elastic force of the compression spring 54S and is released by pulling the knob 54N. (52h) The compression spring 54S is provided in the housing 54H in which the engaging rod 54 having the spring bearing flange 54F is fixed to the front surface of the protrusion at a predetermined position inserted from the front surface.

On the other hand, the oil cam bearing 52B is coupled to the circular cam 53 installed in the inner diameter, the presser foot body 30 by a partial tap bolt 55 screwed to the presser foot support 10 through the circular cam 53. The first link 51 is coupled between the eccentric position 51B of the circular cam 53 and the lower portion 15A of the needle support 20. In the drawings, reference numerals 30H and 53H denote insertion holes of the partial tap bolt 55.

Looking at the operating state of the present invention configured as described above, the presser foot is fixed to the presser foot support 10 at the same position as the state of FIG. 3 (a) and the needle support 20 is elevated.

That is, when the needle support 20 is lowered in the state of FIG. 3 (a), the first link 51 rotates the circular cap 53 about the partial tap bolt 55 to the center point. Smooth sliding action by the oil-lead bearing 52B occurs in the housing 52H of the 52, and the rotational movement about the partial tap bolt 55 of the circular cam 53 is a protrusion of the second link 52. 52A, the protrusion has the cutter 40K by the dovetail coupling with the presser foot body 30 in the state of being locked to the locking hole 44 of the cutter body 40 by the catching rod 54. Lower the cutter body 40 by a certain period.

Therefore, as shown in FIG. 3 (a), the cutter 40K is cut down on the lower portion as shown in FIG. 3 (b) while the end of the cutter 40K is caught on the edge of the cutter blade groove 62 of the needle plate 60. . And the raising operation of the needle support 20 is made in the reverse order of the above description consisting of (a) in Figure 3 (b). At this time, it is preferable to lining the cemented carbide in order to increase the wear durability at the edge of the cutter blade groove 62 is in contact with.

On the other hand, the lifting section 31 of the back of the presser foot body 30 in FIG. 2 is in contact with the bottom surface of the protrusion 41 on the rear of the cutter body 40 while having the force to rise by the torsion spring, while the catching rod 54 is Locked in the locking hole 44 to be interlocked with the link assembly 50, that is, fixed to the needle support 20 by the dove kale coupling in the presser foot body 30 in accordance with the operation of the needle support 20 The cutter body 40 is operated, the lifting section 31 always has an elastic force in contact with the protrusion (41).

When the use of the cutter 40K is not necessary, when the knob 54N of the catching rod 54 is pulled forward, the catching rod 54 compresses the compression spring 54S in the housing 54H while the catching rod 54 is in the cutter body 40. As soon as the lock hole 44 is released, the cutter body 40 moves the dovetail 32 to the guider by raising the protrusion 41 by the resilience force of the lifting section 31 of the position-fixed presser foot body 30. Is raised. At this time, the catching rod 54 is guided by the lifting guide groove 43 in the state of acting as a guider still.

Therefore, as shown in the fourth diagram, the cutter blade 40K is in a state in which a certain period is raised to the upper portion outside the cutter blade groove 62 of the needle plate 60, so that it is positioned without disturbing other sewing operations. At this time, the action occurring in the link assembly 50 is the same as when the cutter 40K is used, and the locking body 54 protruding behind the protrusion 52A of the second link 52 is lifted to fix the position of the cutter body ( The lifting operation is performed without any work in the lifting guide groove 43 of 40).

The present invention is constructed and operated as described above, so that it is possible to perform an effective edge cloth cutting operation by installing a relatively simple link assembly and a presser foot support fixed to the cutter body and a needle support that is elevated to perform an effective edge cloth cutting operation. A simple procedure for assembling the presser foot body, link assembly, and cutter body in a conventional sewing machine without the inconvenience of assembling a sewing machine and a separate sewing machine, and in particular, when the cutter is not used for a long time, the link assembly and the cutter body are Sewing is done separately, the structure is very simple and has an exceptional effect.

Claims (4)

(Correct) The dovetail 32 in the vertical direction is formed on one side of the presser foot body 30 fixed to the presser foot support 10, and the lifting lever 31 for cutter release is formed on the rear side, and at the same time, the cutter 40K. The dovetail groove 42 is formed in the corresponding position of the dovetail 32 of the cutter body 40 on which the installation body is formed, and on the rear side thereof, a protrusion 41 is formed to closely contact the lifting leg 31 with the bottom surface. In the vertical direction is provided with a lifting guide groove 43 having a locking hole 44 in the upper portion of the power transmission means for transmitting the lifting force of the needle support 20 having a sewing needle in the lower portion to the cutter body (40) Edge cloth cutting device of the sewing machine characterized in that provided. (Correction) The method according to claim 1, The power transmission means includes a second link 52 having a protrusion 52A formed on one side of the housing 52H lining the oil release bearing 52B at an inner diameter thereof, and being rotatable by being inserted into the housing 52H. The link assembly 50 comprising the circular cap 53 and the first link 51 connecting between the eccentric position of the circular cap 53 and the needle support 20 is the circular cam 53 and the presser foot body 30. The fastening rod means to be secured with a partial tap bolt 55 which is screwed to the presser foot support 10, and fixed or terminated to the cutter body 40 by the protrusion 52A of the second link 52. Edge cloth cutting device of the sewing machine, characterized in that provided with. (Correction) The method according to claim 2, The locking rod means is provided in a housing 54H in which a locking rod 54 having a spring bearing flange 54F is fixed to the front surface of the protrusion 52A at a predetermined position inserted into the hole 52h of the protrusion 52A. Edge fabric cutting device of the sewing machine characterized in that the compression spring (54S) is installed. (Correction) The method according to claim 1, The cutter 40K is bolted in contact with the two surfaces of the back and side of the cutter body 40, the horizontal end of the horizontal hole in the horizontal direction (40H) to form a blade 40 and the needle plate 60 of the cutter (40K) Edge cloth cutting device for a sewing machine, characterized in that the edge of the cutter blade groove 62 of the far end fine interval control.