JPS6037107Y2 - Thread cutting mechanism in thread winding device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a thread cutting mechanism in a thread winding device that continuously winds thread around a bobbin for sewing machines, particularly industrial sewing machines. The auxiliary rotor is rotatably fitted to the outer periphery of the tip of the rotor body, and the thread fixing plate holder and cutting blade provided on the tip of the rotor body and the thread rotation fixing blade provided on the auxiliary rotor. It is an object of the present invention to provide a thread cutting mechanism that accurately and quickly cuts the thread end associated with a bobbin after winding is completed through cooperation with a plate and a cutting blade holder.

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

In the figure, 1 is a starting shaft that is rotationally driven by an electric motor via a belt 2 and a pulley 3, and there is a predetermined interval at the tip of this starting shaft 1, so that the axis is the same as that of the starting shaft 1. A driven shaft 4 is arranged to face each other, a bobbin 5 is held between the starting shaft 1 and the driven shaft 4, and the yarn is forcibly wound around the bobbin 5 by rotation of the starting shaft 1.

The present invention relates to an improvement in the thread cutting section of such a thread winding device, in which a rotor main body 7 is rotatably fitted to the outer circumference of the starting shaft 1 via a slide bearing 6, and the rotor main body 7 is An auxiliary rotor 10 provided with a thread rotating plate 8 and a cutting blade holder 9 is rotatably fitted to the outer peripheral portion of the tip of the main body 7.

A spiral groove 11 is cut into the outer circumference of the rotor main body 7, and the tip of a slide guide pin 13 protruding from the control panel 12 fits loosely into this groove 11. As the guide pin 13 moves, 1. >(1-tor body 7 is movable in the axial direction.

Also, a coil spring 14 is provided at the rear end of the rotor main body 7.
When the rotor main body 7 is retracted by the slide guide pin 13, the rotor main body 7 can automatically return from the retracted end toward the driven shaft 4 by releasing the guide pin 13.

A cutting blade holder 9 is provided on the auxiliary rotor 10, and a thread rotation setting plate 8 is fixed to the upper surface of this holder 9.

Further, a release pin 15 is provided protruding from the outer circumference of the auxiliary rotor 10, and as the auxiliary rotor 10 rotates, the release pin 15 comes into contact with a pin 16 protruding from the control panel 12. It looks like this.

An uncut command fitting 18 with a pin 17 is provided near the release pin 15. A thread cutting command plate 20 for canceling the mating state is arranged to protrude from the machine frame of the control panel 12.

On the other hand, the auxiliary rotor 1 is attached to the tip of the rotor main body 7.
A thread rotation setting plate holder 21 and a cutting blade 22 are protruded so as to face the thread rotation setting plate 8 and cutting blade holder 9 provided at
The thread rotation setting plate receiver 21 is provided with a groove 23 into which the thread rotation setting plate 8 can fit.

Note that the thread rotation setting plate receiver 21 is made of an elastic material such as rubber.

In addition, 24 in the figure is a spring installed obliquely between the outer circumference of the rotor main body 7 and the outer circumference of the auxiliary rotor 10, 25 is a rubber cap fixed to the tip of the starting shaft 1, and 2
Reference numeral 6 indicates bearings of the starting shaft 1, respectively.

The thread cutting mechanism in the thread winding device of the present invention has the above-mentioned structure, and during thread winding, as shown in FIGS. It is to be engaged with the notch 19.

In this state, the cutting blade holder 9 provided on the auxiliary rotor 10 and the cutting blade 22 provided on the rotor body 7 are separated by an opening of approximately 90 degrees, and the thread 27 is wound around the bobbin 5 by the rotation of the starting shaft 1. It is something that will continue to change.

Then, when the thread 27 is wound to a predetermined thickness, a limit switch (not shown) is activated, and as the electric motor stops, the thread cutting operation begins.

To cut the thread, first, as the auxiliary rotor 10 rotates, the pin 17 of the uncut command fitting 18 provided on the auxiliary rotor 10 is pressed laterally by the tip of the thread cutting command plate 20, and the uncut command fitting 18 is a notch 19 in the rotor main body 7
be freed from

Then, the auxiliary rotor 10 rapidly rotates clockwise due to the restoring force of the spring 24, and the thread rotation setting plate 8 provided on the auxiliary rotor 10 moves together with the thread into the groove 23 of the thread rotation setting plate receiving plate 21.
The thread 27 is fixed by fitting into the inner part.

Next, the cutting blade holder 9 on the auxiliary rotor 10 strongly hits the cutting blade 22 on the rotor main body 7, and the thread is cut by the impact force (FIGS. 4 and 5).

To open the cutting blade holder 9 and the cutting blade 22, as shown in FIGS. 6 and 7, rotate the rotor main body 7 clockwise together with the auxiliary rotor 10, and the The release pin 15 of the auxiliary rotor 10 comes into contact with the pin 16, and the auxiliary rotor 10 stops at that position, and only the rotor main body 7 rotates, so that the uncut command fitting 18 connects to the notch 19 of the rotor main body 7. When the slide guide pin 13 is engaged and in the open state, if the slide guide pin 13 is retreated, the release pin 1
5 is separated from the pin 16, and the cutting blade holder 9 and the cutting blade 22 remain separated and become rotatable.

Therefore, according to the present invention, the thread end can be cut at the same position after the thread winding is completed, and the thread is fixed by the thread rotation fixing plate and then cut by the cutting blade holder and the cutting blade. , which allows for extremely accurate cutting.

The cutting mechanism of the present invention can be applied not only to threads but also to cutting lead wires, wires, etc.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing one embodiment of the thread cutting mechanism in the thread winding device of the present invention, Fig. 2 is a side view of the cutting blade holder and the cutting blade separated, and Fig. 3 is shown in Fig. 2. Fig. 4 is a side view showing the state when the thread is being cut, Fig. 5 is a plan view of the state shown in Fig. 4, and Fig. 6 is a state where the cutting blade holder and the cutting blade are released. The side view and FIG. 7 are plan views of the state shown in FIG. 6. 1...Starting axis, 2...V belt, 3.
... Pulley, 4 ... Driven shaft, 5 ...
...Bobbin, 6...Slide bearing, 7
...Tataichi main body, ...Thread turn setting plate, 9.
... Cutting blade holder, 10 ... Auxiliary rotor, 11 ... Concave groove, 12 ... Control panel, 1
3...Slide guide pin, 14...Coil spring, 15...Release pin, 16...
...Pin, 17...Pin, 18...
・Uncut command fitting, 19... Notch, 20...
... Thread cutting command plate, 21 ... Thread rotating plate receiver, 22 ... Cutting blade, 23 ... Groove, 24 ... Spring , 25...Rubber cap, 26...Bearing, 27...Thread.

Claims (1)

[Scope of utility model registration request] In a thread winding device in which a bobbin is sandwiched between a starting shaft and a driven shaft that are rotationally driven by an electric motor, and the thread is forcibly wound around the bobbin by the rotation of the starting shaft, a rotor is attached to the outer periphery of the starting shaft. In addition to fitting the main body into a rotation drive, an auxiliary rotor equipped with a thread rotation setting plate and a cutting blade holder is rotatably fitted to the tip of the rotor main body. A thread fixing plate receiver having a groove into which the plate can fit and a cutting blade are provided protruding from the tip of the rotor body, and a spring is installed between the outer periphery of the rotor body and the outer periphery of the auxiliary rotor. During thread winding, the thread cutting command fitting provided on the auxiliary rotor is engaged with a notch provided in the rotor body to separate the cutting blade holder and the cutting blade, and after the thread winding is completed, the thread cutting command fitting is is released, the auxiliary rotor is forcibly rotated by the restoring force of the spring, the thread rotation fixing plate provided on the auxiliary rotor is fitted into the thread fixing plate holder to fix the thread, and at the same time the cutting blade holder is fixed. A thread cutting mechanism in a thread winding device, characterized in that the thread is cut by bringing it into contact with a cutting blade.