KR100860774B1 - Rotary shuttle device of sewing machine preventive cut in - Google Patents

Abstract

The present invention is to prevent the upper thread is inserted into the gap between the gib and the guard by preventing the occurrence of single yarns leading to the interruption of the sewing work in advance to prevent the upper thread pinching to significantly improve the work productivity and sewing quality rotation book of the sewing machine Relates to a device.

The present invention for realizing this is a hook body (Hook Body) mounted to the drive shaft and provided with a hook for hanging the upper thread, the bobbin case base (Bobbin Case Base) and the bobbin case for holding the bobbin from the outside Bobbin case (Bobbin Case) consisting of a body (Bobbin Case), the bobbin is installed in the bobbin case and comprises a bobbin (Bobbin) is wound around the bobbin (Bobbin), the hook body is a semi-circular gib (Gib) and the gib on the outside Next, a guard is attached, and the guard is formed with a vertical tip adjacent to the tip of the gib on one side, a space is formed above the vertical tip, and a guard arm protrudes from one side of the upper space of the sewing machine. In the rotary book apparatus, the guard intercepts the opening of the gap to prevent the upper thread from entering into the gap formed between the gib and the gib. The sub guard arm is characterized by configured by comprising a hook body is made to protrude just above the vertical line.

Description

ROTARY SHUTTLE DEVICE OF SEWING MACHINE PREVENTIVE CUT IN}

1 is an exploded perspective view of a typical sewing machine rotary book device

Figure 2a is a needle lowered state so that the upper thread is hooked to the hook body

2b is a momentary drawing of the upper thread of the hook body

2C is a side view of FIG. 2B

3A-3F is a sewing operation process diagram

4 is a combined perspective view of the prior art

5 is an exploded perspective view of a rotary book device of one embodiment according to the present invention;

Figure 6 is a perspective view of the guard in one embodiment according to the present invention

7 is a perspective view of the combination of five

* Explanation of symbols for main parts of the drawings

1: rotary book device of the sewing machine to prevent the upper thread pinching of the present invention

2: needle 3: upper thread 4: lower thread

10: drive shaft 20: hook body

200: hook body 22 according to the invention: hook

25: Gib 26: Guard 261: Vertical tip

262: space 263: guard arm 265: sub guard arm

2651: upper part 30: bobbin case base 40; Bobbin

50: bobbin case body 100: the rotary book device of the prior art

The present invention relates to a rotary drum device of a sewing machine, and in particular, by preventing the upper thread from intervening in the gap between the gib and the guard to prevent the occurrence of single yarns leading to the interruption of sewing work in advance to significantly improve work productivity and sewing quality. It relates to a rotary book device of the sewing machine to prevent the upper thread pinching.

In general, as shown in Figure 1, the sewing machine is equipped with a rotary book device 100 for supplying the lower thread. The rotary book device 100 is mounted on a drive shaft 10 rotatably connected to a power unit and is also referred to as a hook body 20 and a bobbin case housed in the hook body 20. Bobbin Case: BC) and the bobbin bobbin (Bobbin) 40 is wound around, the bobbin case (BC) is accommodated in the hook body (20), also referred to as bobbin case base (Bobbin Case Base) ( 30 and a bobbin case body 50 for storing the bobbin from the outside of the bobbin 40.

A stud 31 is installed at the bottom of the bobbin case base 30, and a bobbin 40 is rotatably arranged at the stud 31.

The hook body 20 has an orbital groove 21 formed therein, and a hook 22 is formed at one end thereof. A groove 23 having a gentle radius of curvature is formed near the hook 22 to allow the lower thread to contact and pass.

In addition, a half semi-circular gib 25 is provided at the outer half of the hook body so that the bobbin case base 30 can be relatively rotatably mounted, and the bobbin case base 30 can be inserted or released therefrom. This bolt is fixed by a fastening means such as a bolt, and a guard (Thread Guard) 26 is connected to the main body of the hook 25 to the main body of the hook body 20 to be releasably fixed by a fastening means such as a bolt. do.

The guard 26 is for guiding the upper thread hanged by the hook 22 of the hook body 20 to be a noose surrounding the bobbin case BC 30, 50, and the tip connected to the gib is formed in a straight line. In addition, a guard arm which is formed higher than the circumferential wall of the bobbin case base is protruded from the upper portion of the straight tip.

Looking at the operation of the rotary book device according to such a configuration as follows.

When the sewing machine operates, the hook body 20 is rotated and the upper thread take-up (not shown) and the needle are lifted and operated. While the hook body 20 is rotated two times, the upper thread needle raises the lower thread once, and the thread take-up operation is performed. Pull out a thread of a certain length for the next thread up.

Figure 2a is a needle lowered state in order to hook the upper thread to the hook body, Figure 2b is a moment view of the upper thread of the hook body, Figure 2c is a side view of Figure 2b.

3A to 3F sequentially show a sewing operation, wherein a, b, c, d, e, and f in each of the figures show a ', b', c ', d', on the front of the rotary book apparatus. e ', f' are a, b. c. d. e. The point of view of the rotary book device of f is turned upside down so that the bottom of the hook body 20 faces three-dimensionally.

Simultaneously with the operation of the sewing machine, the hook 2, which the upper thread 3 is sewn first, descends and the hook body 20 rotates in accordance with the lowering of the needle while the hook 22 walks down the upper thread (FIG. 2 and 3A, 3B). This is possible because the groove 2a is formed on one side of the needle 2 so that the hook 22 of the rotary body 20 can be hooked up to the thread sewn on the needle, and at this time, the needle 2 and the hook If the interval of (22) is far away, the upper thread (3) is not hooked on the hook 22, so the sewing line is not skipped or sewn, too close, the needle collides with the hook 22 and break occurs.

In this way, the upper thread (3) walked down by the hook 22 is guided to the guard 26 of the hook body and becomes a noose to wrap up the bobbin case (BC: 30,50) and eventually raises the lower thread (4) ( 3C to 3F), and the upper thread can wind the bobbin case BC to form a noose because the thread take-up of the upper thread portion pulls a certain length in the previous stroke.

By the way, as shown in Figure 4, the upper thread (upper thread) (3) guided by the guard 26 is inserted into the gap (s) between the king 25 and the guard 26 is a single yarn is generated. As a result, the sewing work is interrupted, thereby reducing the work productivity.

This is because the opening of the gap s between the vertical end of the guard 25 and the gib 25 coupled to the outer periphery of the hook body 20 is open.

The present invention has been made to solve the above problems,

An object of the present invention is to prevent the upper thread is inserted into the gap between the gib and the guard to prevent the occurrence of single yarns that cause the interruption of the sewing work in advance to prevent the upper thread jamming to significantly improve the work productivity and sewing quality of the sewing machine It is to provide a rotary book device.

Rotating drum device of the sewing machine to prevent the upper thread pinch according to the present invention to achieve the above object is a hook body (Hook Body) equipped with a hook for hanging the upper thread, the bobbin case base accommodated in the hook body ( Bobbin Case Base) and a bobbin case consisting of a bobbin case body (Bobbin Case Body) for holding the bobbin from the outside, it is made in the bobbin case and comprises a bobbin (Bobbin) wound around the bobbin,

The hook body has a semi-circular gib on the outside and a guard is attached to the gib, and the guard is formed with a vertical tip adjacent to the tip of the gib on one side and a space formed on the vertical tip. In the rotary book device of the sewing machine is formed guard protrusion protruding from one side of the space,

The guard is characterized in that it comprises a hook body formed by protruding the upper portion of the sub guard arm blocking the gap inlet to prevent the upper thread into the gap formed between the gib.

Hereinafter, with reference to the accompanying drawings an embodiment of a rotary book device of the sewing machine of the present invention will be described in more detail.

5 is an exploded perspective view of a rotary book device according to an embodiment of the present invention, FIG. 6 is a perspective view of a guard according to an embodiment of the present invention, and FIG.

As shown in Figure 5 to 7, the rotary book device 1 of the sewing machine to prevent the upper thread pinch of the embodiment according to the present invention is mounted on the drive shaft 10 is provided with a hook 22 for hanging the upper thread Hook body, bobbin case consisting of a bobbin case base 30 accommodated in the hook body and a bobbin case body 50 for holding the bobbin from the outside; (BC), it is installed in the bobbin case (BC) and comprises a bobbin (Bobbin) 40 is wound around the bobbin (Bobbin), the hook body is a semi-circular Gib (25) on the outside and the gib Successive guard (Thread Guard) 26 is mounted, the guard 26 has a vertical tip 261 adjacent to the tip of the gib 25 is formed on one side and the space 262 above the vertical tip 261. Is formed and the guard arm 263 is formed protruding from one side of the upper space In the rotary book apparatus, the guard 26 has a sub-guard arm 265 which blocks the inlet of the gap (s) in order to prevent the upper thread into the gap (s) formed between the gib (25). It is configured to include a hook body 200 is formed to protrude on the vertical tip 261.

Here, the sub guard arm 265 preferably extends from one side of the upper end of the vertical tip 261 to a predetermined position of the upper end of the gib 25 in order to block the inlet of the gap s.

In addition, the upper portion 2651 of the sub guard arm 265 is inclined to gradually lower toward the tip side.

According to the present invention according to such a configuration, the gap inlet of the gib 25 and the guard 26 is blocked by the sub guard arm 265 in the movement path of the upper thread, thereby ensuring safety without the risk of the upper thread being interrupted.

In other words, the upper guard is inclined at the inlet of the gap (s), which is a trap located in the path of the upper thread, and thus the upper guard is not interrupted in the gap (s) by placing the sub guard arm 265 blocking the gap inlet.

Therefore, in any situation, the upper thread is sewn into the gap (s) between the gib (25) and the guard (26) or there is no fear of single yarns caused by this so that the sewing operation is smoothly made.

In the above, preferred embodiments of the present invention have been described with reference to the accompanying drawings. Here, the terms or words used in the present specification and claims should not be construed as being limited to ordinary or dictionary meanings, but should be construed as meanings and concepts corresponding to the technical spirit of the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

As described in detail above, the rotary drum device of the sewing machine according to the present invention prevents the upper thread pinch is provided with a sub-guard arm for blocking the gap between the gib and the guard on the guard of the hook body, the upper thread is inserted into the gap and the single yarn and It prevents the occurrence of the sewing stop in advance and has an excellent effect of improving the work productivity and sewing quality by smoothly working.

Claims (3)

Hook body (Hook Body) is mounted to the drive shaft 10 and provided with a hook 22 for hanging the upper thread, bobbin case base (30) accommodated in the hook body and for holding the bobbin from the outside Bobbin case (BC) consisting of a bobbin case body (Bobbin Case Body) (50), the bobbin case (BC) is installed in the bobbin case (BC) and comprises a bobbin (Bobbin) 40 wound around, The hook body is provided with a semi-circular gib 25 on the outside and a guard guard 26 connected to the gib, and the guard 26 has a vertical tip adjacent to the tip of the gib 25. In the rotating drum device of the sewing machine 261 is formed on one side and the space 262 is formed on the vertical tip 261 and the guard arm 263 protrudes from one side of the space, The guard 26 has a sub guard arm 265 which intersects the inlet of the gap s to prevent the upper thread from being inserted into the gap s formed between the gib 25 and the vertical tip 261. Is configured to include a hook body 200 is formed protruding from the top, The sub guard arm 265 extends from an upper side of the vertical tip 261 to a predetermined position at the tip of the gib 25 to block the inlet of the gap s, The upper part 261 of the sub guard arm 265 is inclined to be gradually lowered toward the tip side, characterized in that the upper thread pinch is prevented rotary drum device of the sewing machine. delete delete

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