JPS618089A - Needle thread supply mechanism in sewing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an upper thread feeding mechanism for an industrial sewing machine, and more particularly, to an upper thread feeding mechanism in which the thread is fed smoothly without being twisted or tangled, and there is less risk of thread breakage. It is related to.

The conventional general yarn feeding mechanism is the sewing machine body (e.g. arm)
Yarn is fed to the thread take-up from a bobbin installed above or above the sewing machine body, and the bobbin (a') is attached to a support (11) fixed upright on a table (10) as shown in Fig. 5.
It was attached to the bobbin (a') and fed by pulling up the thread wound around the bobbin (a'). Therefore, this conventional product has a gap (a) between the table (10) and the lower end of the bobbin (a').
There was a problem in which the thread that had come loose from the bobbin (a') became tangled or entangled, causing the thread to break. Also, bobbin (a
If the thread is prevented from falling from the table (a') onto the table (10), there is no risk of the thread becoming entangled in the gap (a) between the table (10) and the bobbin (a'), but the resistance of the thread may cause the thread to break. arise. Moreover, the table (10) and bobbin (a
’) so that there is no gap (a) between the bobbin (a
′) on the table (10), the bobbin (a′)
There was a risk of thread breakage due to rotational resistance.

Therefore, the present inventor has conducted various experiments and made extensive research efforts, and as a result, has arrived at the present invention.

That is, in the present invention, the bobbin is suspended from the hanger so that the thread can be drawn out from the bobbin without resistance, and the guide tube is attached to the bobbin so that the thread can be smoothly supplied to the thread take-up without being subjected to resistance from the thread. It is placed between the balance and the balance.

Hereinafter, the present invention will be explained in detail based on the drawings.

In the figure (a) is a bobbin (woodwind) on which the thread (1) is wound in an easy-to-understand manner such as combination building, and the upper end of this bobbin (a) is attached to the guide groove (bl) of the hanger (b). The thread (1) is a thread made of nylon, polyester, etc., and if it naturally unravels and falls under its own weight when the bobbin (a) is suspended, it may be a cylindrical elastic body (not shown). For example, it is desirable to fit a cylindrical circular knitted piece of nylon to the outside of the bobbin (a,).

This bobbin (a) is the same as the conventional one, and is fixed to the hanger (b) in the opposite direction.

(al) shows the beginning of the bobbin (a).

The hanger (b) is attached to a pillar (c) (C), and the upper part of the hanger (b) has a guide groove (bl) into which the bobbin (a) is inserted and fixed, and the lower part has a receiving tray (1) having a through hole. b2) is provided. And that hole is a bobbin (
The hole is drilled on the axial extension line of 'a).

(A) is the main body of an industrial sewing machine;
A guide pipe (d) whose one end is fixed to the through hole of the saucer (b2) extends to the vicinity of the balance (2). In the figure (3
) indicates the needle body, (4) indicates the presser foot, and (5) indicates the needle bar.

The guide tube (d) is a flexible synthetic resin pipe (tube) with a length of about 1 m to 3 m, and its lower end is fixed to a fixed part such as a mounting member (6).

In this way, when the thread (1 thread) from the bobbin (a) is passed through the guide tube (d) and threaded through the needle body (3) via the thread take-up (2) of the sewing machine body (A) and the machine is operated, the thread As shown in the figure, yarn (1) is unwound by one turn on a saucer (b2) and then fed to a needle body (3).

FIG. 4 shows an upper thread feeding mechanism in a multi-needle sewing machine.

According to the present invention, since the bobbin of the needle thread is suspended from the hanger, the needle thread is let out downward from the bobbin without resistance and is supplied to the needle body of the sewing machine main body. Therefore, compared to the conventional product, the needle thread is fed smoothly without any snags, and breakage of the needle thread can be completely prevented. Moreover, since the conventional bobbin is set on the hanger in reverse, the structure is extremely simple and the workability of setting is not impaired.

Thus achieving the intended purpose.

[Brief explanation of the drawing]

1 to 4 show one embodiment of the present invention, FIG. 1 is a side view thereof, FIG. 2 is a front view with a part of the main part cut away, and FIG. 3 is the same as that shown in FIG. 2. The vertical sectional view and FIG. 4 are perspective views of the product of the present invention, which is installed in a multi-needle sewing machine. FIG. 5 is a front view showing a part of the conventional product. In the figure, (a) is a bobbin, (b)
) shows the hanger, (d) shows the guide tube, and (1) shows the thread. Figure 2 Figure 3

Claims (1)

[Claims] The bobbin is suspended from a hanger installed above the sewing machine body, and a guide tube is placed between the fixed piece provided near the lower end of the bobbin and the fixed part near the thread take-up, and the thread of the bobbin is guided into the guide tube. An upper thread feeding mechanism for a sewing machine, characterized in that the needle thread is fed to a thread take-up by passing through a hanging guide tube.