KR100358930B1 - Presser foot stopper for embroidery machine - Google Patents

Abstract

The present invention by mounting the stopper 70 in the hole 59 of the presser foot 51 without changing the structure of the existing presser foot 51 coupled to the lower end of the needle bar 50, to embroider specific embroidery, such as towels In this case, the stopper 70 has a purpose to make the embroidery pattern appear clearly by pressing the cloth to improve the embroidery quality, and the structure is installed vertically in the head portion, and the needle bar reciprocates up and down. A presser foot stopper for embroidery machines comprising a presser foot 51 coupled to a lower end of the needle bar 50 to form a hole 59 and a stopper 70 coupled to the hole 59. will be.

Description

Presser foot stopper for embroidery machine {PRESSER FOOT STOPPER FOR EMBROIDERY MACHINE}

The present invention relates to a presser foot stopper for an embroidery machine, and in particular, when a stopper is attached to the hole of the presser foot without changing the existing presser foot structure coupled to the lower end of the needle bar, the stopper is embroidered with a specific embroidery material such as a towel. A presser foot stopper for embroidery machines in which the embroidery pattern is made clear by pressing the fabric to improve the embroidery quality.

The conventional technology is installed while the main shaft motor for providing power to the lower side of the table is connected to the control unit for controlling the operation, the upper shaft connected to the main shaft motor is installed through the arm side of the embroidery machine, the head on the upper front of the arm Is slidably coupled in the transverse direction.

The upper shaft is provided with a drive cam, the drive lever of the drive cam is installed while slidingly coupled to the cam roller provided on the other side, the drive lever is interlocked with the drive cam to rotate in the lower portion of the arm is provided with a shift at the tip end do.

A guide rod is installed at the arm front portion to guide the shift so as to slide upward and downward, and a needle bar installed at the head is coupled to the shift, and a presser foot is coupled to a lower end of the needle bar.

Referring to the operation of the conventional technology configured as described above is as follows.

First, when the operator adjusts the control unit, the main shaft motor operates to rotate the upper shaft, and the driving cam coupled to the upper shaft rotates together, and the cam roller, which is embedded in the cam groove, rotates along the cam groove and flows left and right by a predetermined width. Done.

Therefore, the driving lever installed on the cam roller rotates around the hinge axis, and the gear gear which is geared with the sector gear formed at the front end of the driving lever performs the repetitive forward and reverse rotational movement about the shaft. While repeatedly moving up and down, the upper thread is continuously pulled to move the needle.

On the other hand, the needle bar driving principle is that the cam roller, which is embedded in the cam groove formed on one side, rotates along the cam groove while the needle bar drive cam interlocked with the drive cam rotates, so that the driving lever rotates about the hinge axis, The shift installed at the tip part slides up and down along the guide rod.

When the shift is elevated, the needle bar coupled to the hook and the presser foot coupled to the lower end of the needle bar are lifted up and down while pushing and pulling the hook inserted into the groove by the lug installed at the center part. The presser foot is already pressing the embroidery object before the needle is lodged in the embroidery object, and when the needle work is completed and ascended, the presser foot passes through the presser foot while partially lifting the embroidery object. The needle continues to operate as described above.

Since the conventional technique of the presser foot for pressing the fabric is made of a wide hole to allow the needle to pass through, the needle may not properly press fabrics or towels with a lot of fine hair when the needle is inserted into or removed from the embroidery object. There is a problem that the pattern is entangled with the cloth and the embroidery pattern is not clearly formed.

Another problem is that when the needle hole of the presser foot is narrowed, the presser foot must be manufactured in various kinds according to the embroidery object, and thus the work efficiency is greatly reduced due to the manufacturing cost and replacement of the presser foot according to the embroidery object.

The present invention by mounting a stopper in the hole of the presser foot without changing the existing presser foot structure coupled to the lower end of the needle bar, when embroidering specific embroidery, such as towels, the stopper presses the cloth so that the embroidery pattern appears clearly The purpose is to improve the embroidery quality more.

The present invention for realizing this is composed of a needle bar vertically installed in the head portion, the needle bar for reciprocating up and down, a presser foot coupled to the lower end of the needle bar to form a hole, and a stopper coupled to the hole.

1 is a front view of the embroidery machine in which the present invention is installed.

2 is a side sectional view of a head unit in which the present invention is installed;

3 is a plan view of the stopper of the present invention.

4 is a front view of the stopper of the present invention;

5 is a state diagram used in the present invention.

<Explanation of symbols for the main parts of the drawings>

20: arm 21: hinge axis 22: drive lever

23: Shift 24: Guide rod 30: Head

31: Rail 32: Home 33: Shaft

34: thread take up 40: upper shaft 41: drive cam

42: cam home 43: cam roller 44: hinge axis

45: driving lever 46: sector gear 47: gear

50: needle stand 51: presser foot 52: needle

53: Lug 54: Home 55: Hook

56: Boss 57: Presser foot press spring 58: Restoration spring

59: Hall 70: Stopper 71: Sleeve

72: flange

5, the main shaft motor 11 providing power to the lower side of the table is connected to the control unit 10 for controlling the operation, and the upper shaft 40 is installed on the main shaft motor 11 as shown in FIG. 5. It is installed to rotate, the upper shaft 40 is installed through the arm 20 side of the embroidery machine. In addition, a drive cam 41 is coupled to the upper shaft 40.

On one side of the driving cam 41, a cam groove 42 is formed in a circular shape, and the cam groove 42 is rotatably installed on the cam groove 42, and a hinge shaft is formed on the cam roller 43. A rear end of the driving lever 45 rotatably installed around the 44 is coupled, and a sector gear 46 is coupled to the front end of the driving lever 45.

At the same time, a rail 31 serving as a guide in the lateral direction is installed at the upper end of the arm 20, and the head 30 sliding to the left and right is coupled to the rail 31.

And the head 30, the shaft 33 is installed in the transverse direction, the shaft 33 is combined with a thread take-up 34 to pull the thread while repeatedly moving up and down, the thread take-up ( 34) A gear 47 geared to the sector gear 46 is formed at the rear end thereof, and a groove 32 is formed at the lower portion of the gear 47 to be slipably coupled to the rail 31.

Meanwhile, the driving lever 22 which rotates while moving along the cam groove 42 formed on the other side of the driving cam 41 is coupled to the lower portion of the arm 20 by the hinge shaft 21, and the driving lever 22 of the driving lever 22 is rotated. A shift 23 is provided at the tip end.

The shift 23 is slidably coupled to the guide rod 24 installed perpendicular to the arm 20, and a lug 53 having a groove 54 is coupled to the front surface of the shift 23.

The lug 53 is provided with a hook 55 which is inserted into and removed from the groove 54, and a needle bar 50 positioned vertically on the hook 55 is installed while engaging the needle 52. 50 is mounted to the head 30 to be moved up and down. The presser foot 51 is installed at the lower end of the needle bar 50.

In addition, the boss 56 installed in the head 30 is coupled to the needle bar 50 so that the needle bar 50 can move up and down, and the needle bar 50 on the upper end of the boss 56 returns to its original position. Restoration spring 58 is provided to provide an elastic force so that the presser foot pressing spring 57 is coupled between the hook 55 of the needle bar 50 and the presser foot 51.

And a presser foot 51 is coupled to the lower end of the presser foot pressing spring 57 of the needle bar 50, and a stopper 70 for pressing a cloth is installed at the lower end of the presser foot 51, and the stopper 70 is a presser foot 51. It is composed of a protruding sleeve 71 is coupled to the hole 59 of the fixed shape and the flange 72 is formed integrally at the lower end of the sleeve 71 so as to press a large area of cloth. .

Referring to the operation of the present invention configured as described above are as follows.

First, when the operator adjusts the control unit 10, the main shaft motor 11 operates while simultaneously transmitting power to the upper shaft 40.

At the same time, the drive cam 41 coupled to the upper shaft 40 rotates together.

Therefore, the cam roller 43 inserted into the cam groove 42 of the drive cam 41 rotates along the cam groove 42. As a result, the roller of the drive lever 45 has the hinge shaft 44. At the same time as the flow is a predetermined angle, and at the same time the drive lever 45 is rotated about the hinge axis (44).

When the driving lever 45 rotates as described above, the gear 47 geared to the sector gear 46 provided at the tip of the driving lever 45 is repeatedly rotated about the shaft 33. The end portion of the thread take-up 34 is repeatedly moved upward and downward by a predetermined angle, thereby continuously pulling the thread located at the upper portion and continuously moving the needle bar 50.

On the other hand, when the drive cam 41 rotates, the drive lever 22 positioned below the arm 20 rotates around the hinge shaft 21 by the transmitted power, and at the same time, the drive lever 22 is distal to the drive lever 22. The installed shift 23 is slid up and down along the guide rod 24.

Therefore, when the shift 23 is raised and lowered, the lug 53 installed at the center portion pushes and pulls the hook 55 inserted into the groove 54, so that the needle bar 50 which is slidably coupled to the hook 55 is The inside of the head 30 is moved up and down, and the presser foot 51 coupled to the lower end of the needle bar 50 is also lifted up and down together.

When the needle bar 50 is lowered, the presser foot pressing spring 57 is compressed between the hook 55 and the presser foot 51 while the presser foot 51 is lowered together.

When the presser foot 51 descends as described above, the flange 72 of the stopper 70 presses the embroidery object.

Therefore, the presser foot 51 and the stopper 70 are fixed to the embroidery object, and the needle bar 50 is continuously lowered while compressing the presser foot pressing spring 57, wherein the needle bar 50 descends while the needle is lowered. (52) The thread pulled down is embroidered by passing through the presser foot 51 and the stopper 70 and being embedded in the embroidery object.

In the above state, the ascending operation causes the needle bar 50 to rise while the presser foot pressing spring 57 is restored by the compressed distance due to the repulsion of the restoring spring 58 while the presser foot 51 is fixed to the floor. In this case, the needle coupled to the lower end of the needle bar 50 is lifted while lifting part from the embroidery object.

Since the presser foot 51 stays on the embroidery object when the needle 52 ascends, the flange 72 of the stopper 70 presses the embroidery object and the lifting is prevented.

Subsequently, when the presser foot pressing spring 57 goes beyond the compressed distance, the needle bar 50 continues to rise and at the same time, the presser foot 51 is raised together by the restoring spring 58.

When the above operation is performed continuously, a shape of a certain shape on the embroidery object is drawn by the thread supplied through the needle.

The present invention is equipped with a stopper that can be slipped into the hole of the presser foot without changing the existing presser foot structure coupled to the lower end of the needle bar, so that the embroidery pattern appears clearly by pressing the cloth such as fuzz or towel, thereby improving the embroidery quality. It works.

Claims (2)

A needle bar installed vertically in the head part to reciprocate up and down, A presser foot coupled to a lower end of the needle bar to form a hole; Presser foot stopper of the embroidery machine, characterized in that consisting of a stopper coupled to the hole. The method of claim 1, The stopper is a presser foot stopper of the embroidery machine, characterized in that the sleeve is formed in the center of the hole through which the needle passes, and the flange formed of a predetermined width while integrally formed at the bottom of the sleeve.