JPH02191490A - Method for supplying thread to sewing machine and latch for thread supply - Google Patents

Abstract

PURPOSE:To eliminate a twist while enabling, if any, the twist to be eliminated until it reaches a sewing machine by supplying a thread from a bobbin winder to the sewing machine while holding the twist or a loop produced by the twist on a latch. CONSTITUTION:A thread 19 is supplied from a bobbin winder 10 to a sewing machine 11 through a hook 18 provided above the bobbin winder 10 so that a twist loop 2 is hooked on the hook 18. The twist loop 2 thus formed is held by the hook 18, so that the thread 19 from the bobbin winder 10 is supplied while rubbing on itself in a twining part 1 formed on the lower portion of the twist loop 2. Thus, even if the twist loop 20 is produced by any twist on the thread 19 immediately after it is withdrawn from the bobbin winder 10, said loop is eliminated by passing through the twining part 1, since the twist loop 20 is gradually undone by the thread rubbing on itself when the twist loop 20 is lifted to reach the twining part 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method of feeding thread to a sewing machine and a hook for feeding thread.

[Prior Art] Usually, in an industrial sewing machine, thread is fed out from a spool placed on a thread stand in the axial direction of the spool and sent to the sewing machine. This is because when the thread is let out upward, the thread can be let out without rotating the bobbin. In the case of industrial use, the spool itself is large, so in order to rotate it and pull it out,
This is because it requires a considerable amount of force and is almost impossible with a normal sewing machine.

In order to pull the thread out from above, the direction from the bobbin to the sewing machine is changed by hooking the thread onto a hook or other hook installed directly above the bobbin.

For example, as shown in FIG. 7, a bobbin 10 is placed on a table 12 on which a sewing machine 11 is installed.ii! The cent is placed on the thread stand 13 placed there. Bottom plate 1 of this thread stand 13
4, a support rod 15 is provided in an upright state, and the thread spool 10 is inserted through the support rod 15 and supported. In addition, the bottom plate 1
A horizontal arm 17 supported by a long iron 16 is provided above 4, and hooks 18 are formed at both ends of the horizontal arm 17. Thread 19 from the spool 10 set on the support rod 15 is let out from above the spool 10 and supplied to the sewing machine 11 via the hook 18 of the horizontal arm 17.

[Problems to be Solved by the Invention] However, the method of feeding thread to a sewing machine by feeding it out in the axial direction of a bobbin winder has a major drawback.

That is, when the thread 19 is supplied from the bobbin 10 to the sewing machine 11, the twisted loop 20 does not occur because the thread is under tension while the sewing machine is in operation. However, when the sewing machine 11 is stopped, such as when replacing a sewn product, the thread 19 sag (as shown by the dashed dot line in FIG. 7), and twisted loops 20 are likely to occur.

"Burning" here means fixing one of the threads and rotating the other, or rotating both in the opposite direction (see FIG. 8(a)). A similar thing occurs when the thread is pulled out in the axial direction from the bobbin (No. 8
(Reference). Moreover, "twist" refers to such a state.

"Twisting" means that by being exposed to fire,
This refers to the occurrence of loops in the thread (see Figure 8 (C)).
. Also, the loop caused by crying! ``Twisting'' in the word ``twisting'' refers to pinching and rotating the thread at right angles to the long plane direction. Therefore, in this case, the presence or absence of twisting does not matter. Also, a loop created by twisting is called a twist loop (see Figure 8! d)).

If this twisted loop 20 occurs, it will pass through the hook 18 and be sent to the sewing machine 11 in this state, so it may get caught in the tension plate of the thread tension adjustment device of the sewing machine 11, or cause a large It may become a resistance (
(See the dash-dotted line in Figure 7). As a result, thread breakage, irregular stitches due to uneven tension with the upper thread or bobbin thread, needle breakage, etc. occur, causing major stagnation of sewing work.

Therefore, there has been a demand in the industry for a method that does not cause twisting, or even if it does twist, it can be removed before the sewing machine.

[Means for Solving the Problems] In view of the current situation, the present inventor has completed the method and latching device of the present invention as a result of intensive research, and the feature is that the invention of the method In this case, when the thread wound around the spool is fed from the axial direction of the spool and fed to the sewing machine, the thread from the spool to the sewing machine is
In the invention of the hanging device, the loop produced by twisting or twisting is supplied while being held in the hanging device.
When thread wound around a spool is fed from the axial direction of the spool and fed to a sewing machine, the thread is twisted to form a loop between the spool and the sewing machine, and the twisted loop is hooked. It consists of a case body, a cylindrical dial with a part of its circumferential surface exposed on the surface of the body, and a hook formed at the tip of a shaft protruding from the surface of the body to hook the thread. The hook rotates in the axial direction in response to rotation of the dial connected via a gear.

Incidentally, the thread referred to in the present invention is one that is supplied to a sewing machine to sew fabric, etc., and may be any thread such as silk thread, human silk thread, synthetic fiber thread, cotton thread, wool thread, hemp thread, etc.

A spool is a piece of paper or plastic tube wrapped around a thread. There are cylindrical cheeses and conical corn.

Letting out the thread in the axial direction refers to pulling out the thread in the direction of the winding axis of the bobbin winder, and it does not have to be completely parallel to the axis, as long as it is approximately in the direction.

A hook is something that hooks a thread and changes the direction of the thread. The shape is generally hook-shaped, but it may also be ring-shaped, and a thread may be inserted through the ring and hung.

The thread is hung on this hook, but instead of simply hanging it, a loop is created and the loop is hung. This loop may be the twisted loop described above or a twisted loop.

Further, the number of times of twisting or twisting is not particularly limited, but it is preferably about 1 to 3 times. Further, the direction of twisting or twisting is preferably opposite to the direction in which the threads unwound from the bobbin are twisted.

The loop held by the hook is not released and is held in that state even when the sewing machine is in operation. Even if the sewing machine stops and the tension of the thread becomes weaker, and a twisted loop occurs near the bobbin winding, the twisted loop is eliminated by the loop hooked on the hook. The reason for this is not clear, but it is thought that the generated loop is resolved by the friction of the tangled portion on the lower side of the loop of the latching device.

Next, regarding the hanging tool of the present invention, this is a hanging tool used in the method described above.

The dial has a cylindrical shape, and may be provided with grooves or irregularities around it to facilitate rotation by friction.

The shaft is a thin cylindrical shaft that connects the dial and hook. The hook may be constructed integrally with the shaft.

A hook is a part for hanging a line, and is usually shaped like a fishing hook.

Because it is configured like this, you can hang the thread on the hook,
By simply rotating a dial, the torsional loops described above can be created.

[Examples] The present invention will be described in more detail below based on examples shown in the drawings.

FIG. 1 shows one embodiment of the method of the present invention, in which thread 19 from a bobbin spool 10 is being fed to a sewing machine 11. This is such that the thread 19 from the thread spool 10 is supplied to the sewing machine 11 via a hook 18 provided above the thread spool 10, and the twist loop 2 is hooked onto the hook 18.

In this way, with the twisted loop 2 formed, hook 1
8, the thread 19 from the thread spool 10 rubs against each other at the entanglement part 1 formed at the lower part of the twisting loop 2 and is supplied.

Therefore, even if a torsion loop 20 is generated in the yarn 19 immediately after being pulled out from the bobbin 10 due to twisting, this loop will be removed from the entangled portion 1.
It will disappear by passing through. this is,
This is thought to be because, as shown in FIG. 2(a), when the twisted loop 20 rises and reaches the entangled portion 1, the threads 19 are gradually unraveled by rubbing against each other as shown in FIG. 2(b). .

The twisting loop 2 shown in this example is made by hooking the thread 19 with your fingers,
It is formed by twisting it three times and then hooked onto a fixed hook 18. However, in order to form the twisted loop 2, the thread 19 is simply hooked onto the rotating hook 21 which is rotatably supported as shown in FIG.
1 may be rotated to form a twisted loop 2 (see 3rd report).

FIG. 4 (al) shows an example of the thread supply hook 30 according to the present invention, in which a dial 32 is rotatably supported inside a case body 31, and a lower end is attached to the bottom of the body 31. A shaft 33 with a hook 18 formed on the main body 31 is rotatably supported.A part of the circumferential surface of the dial 32 is exposed through a window provided on the surface of the main body 31, and this part can be rotated with a finger. That's what I do.

Further, a gear A34 is carved on the lower end of the dial 32, and meshes with a gear B35 provided on the upper end of the shaft 33. An uneven part 36 is formed on the circumferential surface of the dial 32 in the axial direction to prevent slipping when turning the dial 32, and a claw 37 formed on the back side of the case body 31
[See FIG. 4(b)] so that it can rotate only in one direction. Furthermore, a scale 39 is provided on the circumferential surface of the upper end of the dial 32 to display the number of rotations of the hook 18 as the dial 32 rotates. In this example,
The gear ratio is set so that when the dial 32 is rotated once, the hook 18 is rotated five times.

This hook 30 is fixed to the upper part of the spool 10, and hooks the thread 19 onto a hook 18 protruding from the bottom of the case body 31. The thread 19 may be hooked onto the hook 18 and then inserted into the sewing machine 11; however, after being set directly on the sewing machine 11, the thread 19 from the bobbin spool 10 to the sewing machine 11 may be hooked onto the hook 18. Good too. After pulling the thread 19 onto the hook 18, the twist loop 2 is formed by turning the dial 32 with a finger to rotate the hook 18 approximately three times. Now sewing machine 11 has thread 1
9 is now ready to be supplied.

In order to fix the hook 30, it is preferable to provide a hook 40 on the top surface of the case body 31 and to hook it onto this using the horizontal arm 17 of the thread stand 13, as shown in FIG. .

In addition, in this example, a hole 41 is provided in the fastener 40 on the back side, and when the horizontal arm 17 is plate-shaped or attached to a wall surface, etc., a screw can be inserted through this hole 41 to fix it. There is.

FIG. 6 shows another embodiment of the hook 30, in which the case body 3
1 incorporates a digital clock 42. Since the hook 30 is usually installed in the front part of the sewing worker, providing the clock 42 thereon makes it very easy for the worker to see. As a result, the worker becomes more aware of time management, which has the advantage of improving efficiency.

[Effects of the Invention] As described above, by using the method for supplying thread to a sewing machine and the hook for supplying thread according to the present invention, various excellent effects described below are produced.

■ It is possible to reliably eliminate torsion loops that have occurred.

■ Since the twisted loops that occur do not reach the sewing machine, problems such as thread breakage and uneven seams do not occur, leading to improved production.

■ When the sewing machine is stopped, the thread between the bobbin spool and the sewing machine sag, but by holding the loop in the hook, frictional force acts on the tangled part at the bottom of the loop. Therefore, tension is maintained in the thread between the loop and the sewing machine, and no twisted loops occur.

- By using the fastening device of the present invention, a twisting loop can be formed and held extremely easily by simply turning a dial.

It is a diagram.

■・・・Tangled part 10... Thread winding 13... Thread stand 18... hook 20...Twisted loop 32...Dial 2...Twist loop 11... Sewing machine 17...Horizontal arm 19...thread 30...Holding tool

[Brief explanation of the drawing]

FIG. 1 is a front view showing an example of the usage state of the method of the present invention, FIGS. 2(a) and (b) are front views showing states in which the generated torsion loops disappear, and FIG. 3(a) (bl is FIG. 4 is a front view showing a state in which a twisted loop is formed, and FIG.
Fig. 5 is a front view showing the first example of the latching device, Fig. 6 is a front view showing still another embodiment of the latching device, and Fig. 7 is a front view showing the second embodiment of the latching device. A front view showing a conventional example of a state in which yarn is supplied, FIG. 8 1al to (d) are schematic illustrations of twisting, twisting, and twisting forms of yarn, respectively. Figure 8

Claims (1)

[Claims] 1. Letting out the thread wound around the spool from the axial direction of the spool,
A method for supplying thread to a sewing machine, characterized in that, when supplying thread to a sewing machine, the thread from the bobbin winder to the sewing machine is supplied with a loop formed by twisting or twisting being held in a hook. . 2. Letting out the thread wound around the spool from the axial direction of the spool,
When feeding the thread to the sewing machine, the thread is twisted to form a loop between the thread and the sewing machine, and the twisted loop is hooked to the case body and a part of the circumference on the surface of the body. It consists of a cylindrical dial with an exposed surface and a hook formed at the tip of a shaft protruding from the surface of the main body to hook the thread, and the hook is connected to the dial through a gear. A thread supply hook characterized by rotating in the axial direction according to the rotation speed.