JPS6410431B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a thread winding device for winding thread onto a bobbin.The present invention relates to a thread winding device for winding thread onto a bobbin. It is an object of the present invention to provide a thread winding device which can eliminate troubles caused by the cut end of the thread popping out at the beginning of winding.

In this invention, a rotating shaft having a friction disk at the tip is rotatably fitted into a slider which is biased toward a drive disk by a first spring and is held slidably. The shaft is prevented from rotating and is slidably fitted while being biased toward the drive disk by a second spring weaker than the first spring, and further includes a thread guide and a cutting section for cutting the thread. The holder is biased toward the drive disk by a third spring weaker than the first spring, and the wire is slidably fitted into the slider to connect the wire supply section and the holder. The tension is opposed to the forces of the first and third springs, and the wire is then let out to advance the slider, the holding body, the rotating shaft, and the center shaft by the force of the first spring; The center shaft is inserted into the center of the bobbin, and the center shaft is engaged with the center of the drive disk to center the bobbin.Furthermore, by feeding out the wire and advancing the slider, the friction circle at the tip of the rotating shaft is adjusted. When the plate is pressed against one side of the bobbin and the thread, the center shaft advances, but due to interference with the drive disk, the second spring is compressed and even if it retreats relative to the rotating shaft, the second spring By setting the force to be weaker than the force of the first spring, the backward movement of the slider is restricted, and the wire is let out, the holder is advanced by the force of the third spring, and the thread is cut by the cutting part. At the same time, the thread guide is positioned on the outer periphery of the bobbin, and the bobbin is held between the drive disk driven by the motor and the friction disk of the rotating shaft, and the center shaft is rotated. and rotates with the rotating shaft to start winding the thread, and during the rotation at the beginning of winding, the wire is pulled to maintain the center shaft in the advanced state and transmit the rotational force of the drive disk to the bobbin via the center shaft. The slider and rotating shaft are moved slightly backward while maintaining the same position, and the friction disk is separated from the bobbin and the cut end of the thread at the beginning of winding. The slider, holder, rotating shaft, and center shaft are pulled back to release the bobbin, and this operation is performed continuously, but since the cut end of the thread at the beginning of winding is reliably wound into the bobbin, the appearance of the winding is It is constructed so that it can be arranged beautifully, eliminates the trouble caused by the cut end of the thread popping out of the bobbin, and allows such operations to be achieved with an extremely easy structure that only controls the unwinding movement of the wire. be.

An embodiment of the present invention will be described based on the drawings.
Opposing frames 1 and 2 are provided. One frame 1 has a driving disk 3 and this driving disk 3.
A pulley 4 connecting the motor to the motor is supported. A sheet 5 made of an elastic material is attached to the drive disk 3. Further, a centering hole 6, which is a centering portion, is formed in the center of the drive disk 3.

Next, a cylindrical holder 7 is attached to the other frame 2.
is formed integrally with the holder 7, and a cylindrical shaft-shaped slider 8 is held in the holder 7 so as to be slidable while being prevented from rotating. That is, the slider 8 has a groove 10 on its outer periphery that engages with a pin 9 driven from the holder 7.
is formed along the axis. This slider 8
has a friction disk 1 at its tip facing the drive disk 3.
1 is rotatably held via a bearing 13 while being prevented from moving in the axial direction. The friction disk 11 includes a sheet 11a made of an elastic material.
is pasted. Furthermore, a pin 14 is driven into the tip of the rotating shaft 12 from the outer periphery of the rotating shaft 12.
A center shaft 16 having a groove 15 that fits therein is fitted so as to be slidable in the axial direction while being prevented from rotating. The center shaft 16 has a protruding end 17 that is a centering portion that engages with the centering hole 6 of the drive disk 3, and a bobbin 1.
A shaft portion 20 is formed which is fitted into the hole 19 of No. 8 with a predetermined frictional force.

Furthermore, a groove 21 is formed at the tip of the slider 8 along the axial direction. A pin 23 driven from the outer periphery of a ring-shaped holder 22 fitted to the tip of the slider 8 is engaged with the groove 21, whereby the holder 22 is held slidably while being prevented from rotating relative to the slider 8. has been done. This holder 22 includes a thread guide 24 formed by bending a wire while forming a vertically long ring, and a cutting part, that is, a hot wire 26 which has a large electrical resistance and becomes red hot when energized to cut the thread 25.
is maintained.

The slider 8 is connected to the first spring 2.
7, the center shaft 16 is urged by a second spring 28, and the holding body 22 is urged by a third spring 29. The biasing directions are all directed toward the drive disk 3. The force of the first spring 27 is set larger than the forces of the second spring 28 and the third spring 29.

A wire supply section 30 is then provided.
As shown in FIG. 2, this wire supply section 30 is comprised of a cam 31 that rotates in one direction and a swing lever 33 that rotates around a pin 32. Swing lever 3
One end of the wire 3 is joined to the outer periphery of the cam 31, and one end of a wire 35 inserted through the outer cable 34 is fixed to the other end. This wire 35 is connected to the roller 3
A path is determined by 6, and the distal end portion is inserted through the frame 2 and fixed to the holder 22. That is, the tension of the wire 35 acts against the forces of the first, second, and third springs 27, 28, and 29.

Then, as shown in FIG.
An upper chute 37 for supplying the bobbin 18 is provided on the front surface of the bobbin 18. A pair of levers 38 and 39 are provided in the vicinity of the upper chute 37 so as to be connected to a shaft 40 so as to rotate together. The other lever 39 has a rod 4 that supports the lowermost bobbin 18.
3 and a rod 44 extending toward the second bobbin 18 from the bottom are rotatably held.
These rods 43 and 44 are slidably inserted through the sides of the upper chute 37.

Further, a bobbin receiver 45 that supports the bobbin 18 supplied from the upper chute 37 is provided so as to be rotatable about a pin 46 . This bobbin receiver 45 is biased in one direction by a spring 47, but is pulled by a wire 48 and is set at a rest position by a stopper 49.

Furthermore, a lower chute 50 is installed below the bobbin receiver 45.
are arranged so as to be inclined downward toward the conveyance direction. The upper opening of the lower chute 50 is widened upward, and a V-shaped recess 51 is formed at the edge of the opening to position the thread 25 at the center of the lower chute 50.

In such a configuration, each time the wire 42 is loosened and then pulled again, the levers 38 and 39 rotate back and forth once. In FIG. 1, the rod 44 advances to support the bobbin 18 by clockwise movement.
3 moves backward to drop the bottom bobbin 18, and by counterclockwise movement, the bobbin 18 supported by the rod 44 is lowered and supported by the lower rod 43. The bobbin 18 dropped from the upper chute 37 in this manner is supported by the bobbin receiver 45.

Then, as the cam 31 rotates clockwise and the swing cam 31 rotates clockwise, the wire 35
is loosened and the third spring 29 is weaker than the first spring 27, so even if the slider 8 slides to the right, the third spring 29 remains compressed and the holder 22 does not move against the slider 8. does not indicate relative movement. In this state, as shown in FIG. 5, the tip 17 of the center shaft 16 engages with the centering hole 6 of the drive disk 3. As a result, the bobbin 18 is centered.

Furthermore, the wire 35 loosens and the slider 8 advances, and as shown in FIG. It is clamped and fixed between the left side of 18. At this time, center axis 1
Since the advancing position of the slider 6 is limited during the process shown in FIG. 5, the slider 6 slides to the left relative to the slider 8 and the rotating shaft 16 while bending the second spring 28. That is, the second spring 28 maintains a state in which the friction disk 11 is elastically connected to the bobbin 18 more weakly than the first spring 27 .

Furthermore, the wire 35 is loosened, and the holding plate 22 is advanced to the right by the force of the third spring 29. As a result, the hot wire 26 cuts the thread 25 wound around the bobbin 18 on the lower chute 50 as shown in FIG. invite. In this state, the rotation of the motor is transmitted from the drive disk 3 to the bobbin 18 via the center shaft 16, thereby winding the thread 25 onto the bobbin 18.

Immediately after winding the thread 25 in this manner, the wire 35 is pulled by the operation of the cam 31 and the swing lever 33, and the holder 22 is retracted to the left as shown in FIG. The rotation axis 1
2 and evacuate to the left. The amount of movement at this time is within the range in which the friction disk 11 separates from the bobbin 18 without retracting the center shaft 16. Even in this state, the bobbin 18 receives rotational force from the driving disk 3 via the center shaft 16 and winds up the thread 25. Therefore, the cut end 25a of the thread 25 at the beginning of winding is As it progresses, it is gradually drawn in and completely wound up between the winding layers of the bobbin 18.

In this way, when the thread winding operation is completed, the motor stops, and on the other hand, the wire 35 is pulled by the rotation of the cam 31, and the slider 8 is brought into the state shown in FIG.
slides to the left together with the rotating shaft 12 and the holder 22, and the center shaft 16 comes out of the bobbin 18.
At this time, the bobbin 18 can be easily removed from the center shaft 16 by attaching a holding piece 52 for holding the flange of the bobbin 18 to the frame 1 or the like as shown in FIG. When the wire 48 is loosened in this state, the bobbin receiver 45 rotates counterclockwise about the pin 46 in FIG.
falls to 0. The lower chute 50 is inclined in one direction, but since the direction of downward inclination coincides with the direction in which the thread 25 is wound, the thread 25 wound around the bobbin 18 is fitted into the recess 51 and becomes tense, and the tension is The bobbin 18 is maintained in a stopped state. That is, the thread 25 wound around the bobbin 18 is never unraveled. In this way, the tensioned thread 25 is cut by the hot wire 26 by the advance movement of the slider 8, and at this time, the bobbin 18 is moved toward the lower chute 5 in a predetermined direction.
Rolling over 0. Even during this rolling, bobbin 1
8 rotates in the direction of winding the thread 25.

In this way, the centering of the bobbin 18, the bobbin 18
clamping, cutting of the thread 25, advancement of the thread guide 24 at the beginning of winding of the thread 25, cutting end 25 at the beginning of winding of the thread 25
A series of operations such as retraction of the friction disk 11 to wind up the material and release of the bobbin 18 after winding is completed can be performed only by controlling the tension of the wire 35, thereby simplifying the structure and ensuring reliable operation. can be done. Also, since the cut end 25a of the thread 25 is completely wound around the bobbin 18, the lower chute 50
When the bobbin 18 rolls, it does not get caught in the middle. Accordingly, it is possible to set the width of the lower chute 50 to a size that does not create a gap between the lower chute 50 and the bobbin 18, thereby preventing the thread 25 from becoming unraveled when the bobbin rolls.

As described above, this invention includes a slider holding a rotating shaft having a friction disk facing a driving disk, which is biased toward one side by a first spring so as to be slidable, and a bobbin is held on the rotating shaft. A center shaft that engages the drive disk while being biased by a second spring is provided so as to be able to slide freely, a holder connected to the wire is provided with a thread guide and a cutting part, and this holder is connected to a third spring. The second and third springs are set weaker than the first spring, and the tension of the wire is opposed to the force of the first and third springs. By loosening the wire, centering of the bobbin by the center shaft, clamping of the bobbin, guiding operation of the thread guide by advancing the holder, and cutting of the thread can be performed, and by tensioning the wire, The friction disk can be retracted from the bobbin at the beginning of winding, and the slider can be retracted to the starting position after winding. In this way, the bobbin can be moved from being clamped to being released just by controlling the tension of the wire. Since the process can be controlled, the structure can be simplified.Furthermore, the beginning cut end of the thread can be neatly wound into the bobbin, and troubles caused by the cut end flying out from the bobbin can be eliminated. It is effective.

[Brief explanation of drawings]

The drawings show one embodiment of the invention.
The figure is an exploded perspective view, Figure 2 is a side view, Figure 3 is an exploded perspective view showing the fitting relationship between the slider, rotating shaft, center shaft and holder, and Figures 4 to 8 are the process of thread winding operation. FIG. 9 is a partial plan view. 3... Drive disk, 6... Centering hole (centering part), 8
... Slider, 11 ... Friction disk, 12 ... Rotating shaft, 16 ... Center shaft, 17 ... Tip (centering part),
18... Bobbin, 20... Shaft, 22... Holder, 24... Thread guide, 25... Thread, 25a... Cut end, 26... Hot wire (cutting part), 27... First spring , 28... second spring, 29...
...Third spring, 30...Wire supply section, 3
5...Wire.

Claims (1)

[Claims] 1. A drive disk having a centering portion formed in the center is connected to a motor so as to be freely rotatable, and a rotating shaft having a friction disk facing the drive disk with a bobbin in between is provided, and this rotating shaft is A slider held rotatably is provided so as to be slidable while being biased toward the driving disk by a first spring, and a centering part that engages with the centering part and a shaft part that holds the bobbin are arranged. A formed center shaft is provided, and this center shaft is prevented from rotating at the tip of the rotating shaft, and is slidable while being biased toward the drive disk by a second spring that is weaker than the first spring. A third spring weaker than the first spring is used to prevent the slider from rotating the holder that holds the thread guide that fits and guides the thread to the outer periphery of the bobbin and the cutting section that cuts the thread. one end of the wire is connected to the wire supply section and the other end of the wire is fixed to the holder, and the first and third springs A thread winding device characterized in that the tension of the wire is opposed to the force.