JPH0727479U - Two-needle sewing machine - Google Patents

Abstract

(57) [Summary] [Objective] To enable simple and reliable threading of a two-needle sewing machine with a threader having a simple structure. [Structure] Fitting holes 22 and 23 are formed on both sides of a bracket 19 attached to a needle stopper 17 of a needle bar 16 so as to match the eye holes 11 and 12 of the needles 8 and 9. The threader 1 has a head 2 and
Pin 6 inserted into the head 2 and having both ends protruding from the head 2
And arms 3a and 3b branched from the head and arranged in parallel, a threader 4 for the left needle and a threader 5 for the right needle attached to the ends of the arms.
The left needle 9 is threaded with one end 6 on the right side of the pin 6.
After a is fitted in the fitting hole 22, the threading device 1 is rotated back and forth with one end 6a of the pin 6 as a fulcrum, and the hook portion of the threading device 4 is passed through the eye hole 12 of the needle 9. The threading to the right needle 8 is performed by fitting the other side 6b on the right side of the pin 6 into the fitting hole 23 and similarly rotating the same.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a threading machine for a two-needle sewing machine such as a sewing machine, particularly a double-needle double chain stitch sewing machine, an overlock sewing machine, and a lockstitch sewing machine.

[0002]

[Prior art]

 There are two types of threading machines for sewing machines, one of which is the type that the user holds in his / her hand and the other type of which is built into the sewing machine and which is used by taking a picture or operating a lever when using. Of these, the former type, in which the user himself holds the thread in his hand, requires the work of passing the hook part of the threader through the eye hole of the needle, and the thread part is passed through the small eye hole of the needle. Is similar to threading, and in a two-needle sewing machine, the two needles are placed close to each other, so the right and left needles are often mistakenly threaded. It was happening.

On the other hand, the latter type that is built in the sewing machine has an advantage that the hook portion can be surely inserted into the eye hole of the needle during threading, but the hook portion is lowered by taking a picture or operating the lever. When you take a picture or release the lever after inserting it, the hook part catches the thread and slips out of the eye hole, then rises and automatically returns to the position retracted from the vicinity of the needle. Therefore, the structure is complicated, the number of parts is large, and it is necessary to secure a space for storing the threading mechanism inside the sewing machine.

Some of the latter built-in type threader is used for a two-needle sewing machine. In the case of a two-needle sewing machine, the left needle eye hole and the right needle eye hole have loopers and hooks. Since the heights are different to match the timing with the tip of the sword, the hook had to be moved up and down when threading the left and right needles, making the structure more complicated.

[0005]

[Problems to be solved by the device]

 An object of the present invention is to provide a simple threader having a structure capable of reliably threading a two-needle sewing machine.

[0006]

[Means for solving the problem]

 The threading device of the present invention comprises a head that is detachably attached to either the left or right side of the needle stop portion of the needle bar and is rotatable back and forth, an arm that branches from the head and is arranged in parallel, and Threader for the right needle, which is attached to the arm of the needle and has a hook at a position with a radius of gyration from the center of rotation of the head attached to one side of the needle stop to the eye hole of the right needle. And the left needle attached to the other arm and provided with a hook at a position having a radius of gyration extending from the center of rotation of the head attached to the other side of the needle stop to the eye hole of the left needle. It is characterized by consisting of a threader.

According to the present invention, when the head is attached to one side of the needle stopper and pivoted toward the front, the hook of the threader for the right needle is inserted into the eye hole of the right needle, When the is attached to the other side of the needle stop and rotated to the front, the hook portion of the threading needle for the left needle is inserted into the eye hole of the left needle. In a preferred mode for detachably and rotatably attaching the head portion to the needle stopper portion, a pin is provided on one of the head portion and the needle stopper portion so as to project laterally, and the pin is detachably attachable to the other. A fitting hole to be fitted is formed, and in a more preferable aspect, at least one of the pin and the needle stopper is formed of a magnet, and both are attracted by a magnetic force. The head can be rotatably attached to the needle stopper by simply fitting the pin into the fitting hole. Also, if at least one of the pin and needle stopper is formed with a magnet, the pin will be inserted into the fitting hole. When mated, the pin is supported by magnetic force, so the support condition is stable and it does not accidentally fall off.It may also interfere with the rotation due to the nature of the magnet. Absent.

To make the turning radius of the hook different between the right needle and the left needle, the rotation center is changed up and down on one side and the other side of the needle stopper, or the hook is attached vertically by the arm. Change the position. For example, when a pin is provided on either one of the head and the needle stopper, and a fitting hole is provided on the other, to change the center of rotation between one side and the other side of the needle stopper, it is formed on the needle stopper. Change the vertical position of the pin protruding from the fitting hole or the needle stop part to the left or right, or change the vertical position of the pin protruding from both sides of the head or the vertical position of the fitting hole formed on both sides of the head to the left or right. You should change with.

[0009] Ah, the needle stopper in the present invention means a needle stopper attached to a needle bar and fixing a needle, or a bracket attached to the needle stopper. Is said to be.

[0010]

【Example】

 An embodiment of the present invention will now be described with reference to the drawings. A threading machine generally designated by reference numeral 1 includes a head 2, arms 3a and 3b branched from the head 2 and arranged in parallel with each other. 3a and 3b, each of which comprises a threader 4 for the right needle and a threader 5 for the left needle, and a pin 6 is horizontally inserted and fixed to the head 2, and protrudes from the right side of the head 2 in the figure. One end 6a which projects is a left needle positioning part, the other end 6b protruding from the left side of the head 2 is a right needle positioning part, and the right needle threader 4 and the left needle threader 5 are also each arm. It is mounted at the same level as 3a and 3b, that is, at the same spacing as the pin 6. As shown in FIG. 3, each threader 4 and 5 has a hook 13 and a hook 13 that can be passed through the eye holes 11 and 12 (see FIG. 2) of the right needle 8 and the left needle 9, respectively. And a guide 15 having a mounting portion 14 to the arms 3a and 3b.

The right needle 8 and the left needle 9 are respectively fixed to a needle stopper 17 attached to the lower end of the needle bar 16 with set screws 18 and 18, and are U-shaped bras that are fitted to the needle stopper 17 from the rear side. The ket 19 is fixed to the lower end of the needle bar by screws 21 together with the needle stopper 17. The bracket 19 has a fitting hole 22 into which the right protruding end 6a of the pin 6 is rotatably fitted on the left side, and a fitting hole into which the left protruding end 6b of the pin 6 is rotatably fitted into the right side. 2 and 3 are formed at the positions of the eye holes 11 and 12 of the right needle 8 and the left needle 9, respectively. That is, the fitting hole 22 is located at such a position that the hook portion 13 of the left needle threader 5 can pass through the eye hole 12 of the left needle 9 when the right protruding end 6a of the pin 6 is fitted into the hole 22. (FIG. 4) In addition, when the left protruding end 6b of the pin 6 of the hole 23 is fitted, the hook portion 13 of the right needle threader 4 passes through the eye hole 11 of the right needle 8 (FIG. 4). It is formed at each of the positions (FIG. 5) that can be obtained.

FIG. 6 shows an example in which the thread threader 1 is attached to one side of the bracket 19 as described above for threading the left needle 9 of the two-needle overlock sewing machine 25. is there. That is, for threading the left needle 9, as shown in FIG. 4, the right protruding end 6a of the pin 6 is fitted in the fitting hole 22 and the threading device 1 is attached to the bracket 19 and then threaded. The device 1 is rotated counterclockwise from the state of FIG. 7 with the protruding end 6a of the pin 6 as a fulcrum, and the hook 13 is passed through the eye hole 12 of the left needle 9 (FIG. 8). Then, after hooking the thread on the hook portion 13 protruding from the eye hole 12, push the threading device 1 to the left in the figure to rotate it clockwise, and pull out the hook portion 13 from the eye hole 12 together with the hooked thread. . When threading the right needle 8, the threader 1 is replaced with the opposite side of the bracket 19 and threading is performed in the same manner as above.

In the above-described embodiment, the left and right fitting holes 22 and 23 are formed so as to match the eye holes 11 and 12 of the needle. It is formed in accordance with the hole (in this case, the left and right fitting holes are located on the same axis), and in yet another embodiment, the threaders 4 and 5 are formed in accordance with the eye hole of the needle (in this case). , The pin and the fitting hole are located on the same axis.)

[0014]

[Effect of device]

 The present invention is configured as described above and has the following effects. According to the threader of the first aspect, the threading to the right needle or the left needle can be easily and surely performed by attaching the needle threader to one side or the other side of the needle stop and performing a single turning operation. In addition, the structure is simpler than that of the built-in type, without the need to make structural changes to the conventional sewing machine except for the needle stopper.

In the threading machine according to the second aspect, the threading machine can be rotatably attached to the needle stopper by simply fitting the pin into the fitting hole. In the threading device according to the third aspect, the state of attachment to the needle stopper is stable, and it is difficult for accidental dropout to occur. In the threading machine according to claim 4, the fitting hole may be formed so as to be aligned with the eye hole of the needle, and the pin may be fitted into the head portion or the needle stopper portion and protruded from both sides. Easy and easy to manufacture, lowering manufacturing cost.

Further, in the threading device according to the fifth aspect, since the fitting holes are located on the same axis, the fitting hole can be easily formed, and the threading device according to the sixth aspect has the fitting hole. Since the pins and pins are located on the same axis, it is easy to form a fitting hole and provide pins.

[Brief description of drawings]

FIG. 1 is a perspective view of a threader attached to a needle stopper.

FIG. 2 is a perspective view showing a state before the threading device is attached.

FIG. 3 is a perspective view of the threader.

FIG. 4 is a front view showing a state when threading the left needle.

FIG. 5 is a front view showing a state in which the right needle is threaded.

FIG. 6 is a side view showing a state in which the threading device according to the present invention is attached to a needle stopper portion of a two-needle overlock sewing machine.

FIG. 7 is a partial cross-sectional side view showing the positional relationship between the left needle and the threader of the threader attached to the needle stopper.

FIG. 8 is a partial cross-sectional side view showing a state in which the hook portion is passed through the eye hole of the needle.

[Explanation of symbols]

1 ... Threader 2 ... Head 3a, 3b ... Arm 4 ... Left needle threader 5 ... Right needle threader 6 ... Pin 8 ... Right needle 9・ ・ ・ Left needle 11, 12 ・ ・ ・ Eye hole 13 ・ ・ ・
Hook 17 ... Needle stopper 19 ...
Brackets 22, 23 ... Fitting holes

Claims (6)

[Scope of utility model registration request] 1. A head that is detachably attached to one of the left and right sides of a needle stop portion of a needle bar and is rotatable back and forth; an arm that branches from the head and is arranged in parallel; The threader for the right needle, which is provided with a hook at a position having a turning radius of the length from the center of rotation of the head attached to one side of the needle stopper to the eye hole of the right needle, and the other Threader for the left needle, which is attached to the arm of the needle and has a hook at a position with a radius of gyration of the length from the center of rotation of the head attached to the other side of the needle stop to the eye hole of the left needle A threading machine for a two-needle sewing machine characterized by comprising 2. The double needle according to claim 1, wherein a pin is provided on one of the head and the needle stopper so as to project laterally, and a fitting hole for detachably fitting the pin is formed on the other. Sewing machine threader. 3. The threading machine for a two-needle sewing machine according to claim 2, wherein at least one of the pin and the needle stopper is formed of a magnet. 4. The two-needle sewing machine according to claim 2, wherein the pin is fitted into the head portion or the needle stopper portion and protrudes on both sides, and the fitting holes on both sides are respectively formed so as to match the eye holes of the needle. Threader. 5. The pin according to claim 2, wherein the pins are formed on both sides of the head portion or the needle stop portion so as to be aligned with the eye holes of the needle, and the fitting holes on both sides are located on the same axis. 2-needle sewing machine threader. 6. The threading machine for a two-needle sewing machine according to claim 2, wherein the threading machine for the right needle and the threading machine for the left needle are attached in accordance with the eye holes of the needles.