JPS6229529B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a threading device that operates when doffing a full bobbin of a thread winding machine, installing an empty bobbin, or replacing the bobbin.

In recent years, in thread winding machines that cheese-wind yarn from a spinning spun or a drawing false twister, etc., doffing of full bobbins, installation of empty bobbins, cutting of tail yarns related to this, and cut supply yarns have been introduced. Various so-called automatic doffing devices that automatically perform a series of processes such as holding the end, threading an empty bobbin, and cutting the crossover thread during threading have been proposed and put into practical use.

The present invention is a device in which the threading operation in the above-mentioned automatic doffing device can be carried out reliably and quickly using a simple mechanism, and its gist consists of a thread cutting groove recessed on the periphery and a periphery on the bobbin side. In a thread winding machine that horizontally rotates a bobbin fitted at one end with a thread cutting collar having a hook sheet attached to the side surface, the bobbin is installed in the front of the thread winding machine in parallel with the bobbin and placed at a position corresponding to the thread cutting collar. A traverse guide tube having an air intake port, and a thread that is transferred from below to above the traverse guide pipe and is sucked into the air intake port, is pulled up above the traverse guide pipe, and the traveling path of the thread is directed approximately vertically. A guide rod is provided with a threading guide at its tip, which is a threading guide consisting of two forked pieces each having a front edge as a thread-locking edge. A mechanism that moves the guide rod in the axial direction from a position where it catches the yarn to a position where it pinches the yarn cutting collar, and during the movement process, the guide rod is rotated around the axis to an angle where the captured yarn intersects with the yarn cutting collar. This is a thread threading device for a thread winding machine, characterized in that it has a holding mechanism.

Embodiments of the present invention will be described below with reference to the drawings.

Figure 1 is a side view showing the relationship between a bobbin winder and a mobile cart carrying devices for performing various operations related to automatic doffing such as thread gathering, thread cutting, thread travel route regulation, and thread threading. Its plan view, Fig. 3 is a front view of the movable cart, Fig. 4 is a perspective view of the main part showing the relationship between the thread shifting guide and the traverse guide tube, Fig. 5 is a front view of the thread shifting guide, and Fig. 6 8 to 8 are respective perspective views showing the threading operation process, FIG. 9 is a perspective view of the oiling device, FIG. 10 is a working state diagram of the oiling device, FIG. 11 is a perspective view of the threading guide, and FIG. The figure is a perspective view of another threading guide, FIG. 13 is an explanatory front view of the threading guide in a state where it has reached the thread cutting collar, FIG. 14 is its side view, and FIG.
16 is a front view thereof, and FIG. 17 is a front view of the bobbin in a state where the thread has begun to be wound around the bobbin.

In FIGS. 1 to 3, 1 is a friction roller for driving the bobbin of a thread winding machine, 2 is a bobbin,
Reference numeral 3 denotes a thread cutting collar rotatably fitted to the inner surface of the bobbin holder, which fits one end of the bobbin 2 and rotates together with the bobbin 2 around a horizontal axis. As shown in FIG. 15, the collar 3 is provided with a plurality of thread cutting grooves 4 on its periphery, and a hook sheet 16 of hook-and-loop fastener is affixed to the circumferential surface on the bobbin 2 side between the thread cutting grooves 4.

5 is the friction roller 1 on the front of the thread winding machine.
A traverse guide pipe extending parallel to the axis, and the traverse guide pipe 5 is connected to a decompression suction device 6 provided outside a row of a plurality of thread winders arranged in parallel.
This is to keep the inside of the tank in a reduced pressure state.

A parallel rail 19 is laid on the floor in front of the traverse guide pipe 5 in parallel with the traverse guide pipe 5, and a trolley 20 carrying a mechanism for performing various operations related to doffing as described later runs on it. It will be installed like this.

A stopper 7 consisting of a fixing ring 74, a coil spring 73, and a thread guide receiving ring 72 is provided on the traverse guide tube 5 at a position corresponding to the thread cutting collar 3 fitted to the bobbin holder of the thread winding machine.

The thread shifting guide receiving ring 72 always seals an intake port 75 formed on the upper surface of the traverse guide tube 5. The end of the traverse guide tube 5 is sealed.

Reference numeral 8 indicates a fixed thread guide provided below the traverse guide tube 5 so as to be located approximately in the center of the winding width of the bobbin 2; 10 indicates an oiling roller; 11 indicates a thread guide provided at the tip of the lever 12;
The yarn Y transferred by the swinging of the roller 2 comes into contact with and leaves the surface of the oiling roller 10, and is oiled or the oiling is interrupted. 13 indicates a full bobbin.

The trolley 20 receives a detection signal just before the yarn layer of the bobbin of the bobbin of the bobbin winder becomes almost full, moves to the front of the bobbin winder, stops, and at the same time as doffing the bobbin to full size, as will be described later, , thread cutting, thread travel route regulation, thread threading, and other operations are sequentially performed.

The truck 20 is provided with the following pressure cylinders. That is, 21 is a pressure cylinder that operates the lever 12 of the oiling roller 10, 22 is a pressure cylinder that swings the thread shifting arm 30, and 23 is a pressure that moves the thread shifting arm 30 in the direction of the spline shaft 31 that supports the thread shifting arm 30. cylinder, 2
4 is a pressure cylinder that operates the thread-pulling guide 32; 25 is a pressure cylinder that moves the pressure cylinder 24 up and down together with the thread-pulling guide 32; 26;
is a pressure cylinder that operates the threading guide 33, the pressure cylinder 21 is located approximately below the center of the cart 20, the pressure cylinders 22 and 23 are on the left side of the cart 20, and the pressure cylinders 24, 25, and 26 are located below the cart 20.
They are fixedly installed on the right side of 0.

As shown in FIG. 4, the thread shifting arm 30 has a thread shifting guide 40 bent downward at its tip, and the thread shifting guide 40 is provided with a protruding piece 41 on the right side as shown in FIG. A fine sawtooth-like uneven surface is formed on the upper surface of the projecting piece 41 to which the yarn engages, and a cutter section 43 is provided at the right edge of the lower surface of the projecting piece 41 via a stepped section. The base of the thread shifting arm 30 is connected to a guide bush 3 fitted onto a spline shaft 31.
5, and the guide bush 35 is fixed to the connecting plate 3.
6 to the working end of the pressure cylinder 23. Further, the spline shaft 31 is rotatably supported, and its protruding shaft end is connected to the operating end of the pressure cylinder 22 via a connecting rod 34, so that when the pressure cylinder 22 is operated in the retracting direction, the spline shaft 31 is slightly rotated. Along with this, the thread shifting arm 30 and the thread shifting guide 40 move toward the traverse guide tube 5.
The yarn shifting arm 30 is positioned so as to cover the upper and rear surfaces, and as the pressure cylinder 23 protrudes, the yarn shifting arm 30 moves along the traverse guide tube 5 and winds the yarn Y in contact with the traverse guide tube 5. is hooked onto the cutter portion 43 on the lower surface of the thread guide 40 and slid toward the stopper 7, and the cutter portion 4
3 pushes the thread guide receiving ring 72 of the stopper 7 toward the fixed ring 71 against the elastic force of the coil spring 73, and
Open the intake port 75 that was sealed by 2,
The thread is stopped at the position shown by the dashed line 30' (FIG. 2) and the thread is brought up.

The threading mechanism includes a threading guide 3 that is made up of two forked pieces each having a wedge-shaped notch thread-locking edge formed on each front edge.
3, a guide rod 45 with the threading guide 33 installed at its tip, and a pressure cylinder 26 installed parallel to the guide rod 45. The pressure cylinder 26 is connected and supported so as to be rotatable, and is held by passing through a guide tube 47 fixedly attached to the pressure cylinder 26.

A guide groove 48 extending in the axial direction and slightly bent obliquely in the middle is recessed in the outer surface of the guide rod 45, and a pin 49 fixedly protruding from the guide tube 47 is engaged with the guide groove 48.

Therefore, the actuation of the pressure cylinder 26 causes the guide rod 45 to move together with the connecting member 46 at its working end.
protrudes and captures the yarn whose travel path is regulated in a substantially vertical direction as will be described later between the yarn locking edges of the yarn hooking guide 33. By the time the threading guide 33 reaches the position where it pinches the thread 3, the threading guide 33 is moved so that the thread caught by the threading guide 33 crosses the thread cutting collar 3 as shown by the dashed line 33'. The guide rod 45 is rotated around its axis counterclockwise in its projecting direction so that the thread caught by the guide rod 33 intersects the thread cutting collar 3.

Based on the above-mentioned configuration, this device performs thread gathering, thread cutting, and regulation of the running path of the supplied thread when doffing a full bobbin and installing an empty bobbin in a bobbin winder as shown below. It is something that is put on hold.

When the bobbin reaches full capacity, the pressure cylinder 21 is activated to project the operating end that is in the retracted position, and swings the bar 12 to separate the yarn Y from the surface of the oiling roller 10 to interrupt oiling ( 9th
(Fig. 10), and at the same time the pressure cylinders 22, 2
3 operates to swing the thread shifting arm 30 and the thread shifting guide 40 at its tip so as to cover the upper and rear surfaces of the traverse guide tube 5, and advance the thread shifting arm 30 along the traverse guide tube 5. The thread Y running in contact with the surface of the traverse guide tube 5 is shifted towards the stopper 7 to a position corresponding to the thread cutting collar 3 of the thread winding machine.

During this time, the pressure cylinder 24 is operated to cause the thread drawing guide 32 to protrude to a position indicated by a dashed line 32' directly below the traverse guide tube 5.

As the thread shifting arm 30 advances, the cutter portion 43 of the thread shifting guide 40 engages the running yarn Y, contacts and presses the thread shifting guide receiving ring 72, and releases the coil spring 73. When the suction port 75 is opened and stopped, the yarn Y is held under pressure between the cutter portion 43 and the side surface of the yarn guide receiving ring 72, and the yarn Y is held in place by the side surface of the yarn guide receiving ring 72, and the yarn Y is held in place by the side surface of the cutter portion 43 and the side surface of the yarn guide receiving ring 72. It is cut by tension, the winding side is wound onto a bobbin as a tail thread, and the supply side is sucked into the traverse guide pipe 5 through the suction port 75, and the thread shown in FIG.
As shown in Y', the yarn travel path is regulated between the fixed yarn guide 8 and the suction port 75. The thread pulling guide 32' that was protruding at this point is now attached to the pressure cylinder 2.
4 returns to the position shown by the solid line in Fig. 1, and further, by actuation of the pressure cylinder 25, the thread pulling guide 32 is raised to the position shown at 32'' in Figs. The thread travel path is regulated through the fixed thread guide 8, the raised thread pulling guide 32'', and the intake port 75. Fig. 6 is a perspective view showing this state. During this time, the full bobbin on the thread winder side is It is fried and the empty bobbin is replaced.

The yarn Y″ running under tension between the raised thread pulling guide 32″ and the suction port 75 is connected to the thread pulling guide 33
Since the line is arranged in a substantially perpendicular direction so as to intersect with the protruding path, the pressure cylinder 26 operates at the same time as the thread pulling guide rises to the 32'' position, and at the same time the guide rod 45 protrudes and pulls the thread at its tip. The thread Y″ is caught between the thread locking edges of the wedge-shaped notch of the bifurcated piece of the hanging guide 33 and
The guide rod 45 rotates and protrudes so as to sandwich the thread cutting collar 3 (Fig. 7), and the thread caught between the thread locking edges is guided into the thread cutting groove 4 of the thread cutting collar 3 and cut. The yarn end on the supply side is held on the hook sheet surface of the hook-and-loop fastener provided on the inner surface of the yarn cutting collar 3 and wound onto the bobbin 2, and the other cut yarn is sucked and removed by the suction port 75 to complete the threading process. ends.

The rotation angle of the guide rod 45 is set so that the thread and the thread cutting collar 3 can intersect at right angles or near-orthogonal angles so that the thread caught by the thread guide 33 can be easily cut. is necessary,
On the other hand, in order to prevent the tip of the threading guide 33 from coming into contact with the bobbin surface, the angle is determined according to the difference in diameter between the thread cutting collar 3 and the bobbin 2, and is usually selected to be an appropriate angle in the range of 60 to 90 degrees.

Immediately before the threading process is completed, the pressure cylinder 25 operates in reverse, the threading guide 32 is lowered, and at the same time as the threading process is completed, the supply side yarn is transferred to the uneven surface 42 on the upper surface of the protruding piece 41 of the threading guide 40. a pressure cylinder 23 that engages and simultaneously reverses operation;
As a result, the thread shifting arm moves from the 30' position in Fig. 2 to the 30 position (Fig. 8), and along with this, the yarn is stopped by the traverse guide pin, and the thread shifting arm 30 is further moved to the left. When the thread moves to , the thread is separated from the uneven surface 42 due to its tension, and traverse winding is performed by the operation of the traverse guide pin, so that a thread layer is formed on the bunch-wound thread portion on the bobbin.

During this time, the pressure cylinder 21 operates in reverse and its working end is pulled back forward from the yarn traveling path, and the lever 12 resists the yarn tension due to its own weight, moves down the yarn guide 11, and oils the yarn Y. is performed, and the pressure cylinder 26 operates in reverse to retract the threading guide 33 to its original position, and the pressure cylinder 2
2 operates in reverse to swing the thread shifting arm 30 so that the thread shifting guide 40 at its tip is above the travel path of the yarn Y, and return to their original states.

In this way, the bobbin 2
0 moves and stops in front of the thread winding machine and automatically performs the aforementioned operations of thread gathering, thread cutting, thread traveling route regulation, and thread threading.

FIG. 11 is a perspective view showing a preferred embodiment of the threading guide 33, in which a long piece 38 and a short piece 37 are substantially parallel to form a bifurcated piece, and each piece has a wedge-shaped notch of similar shape at the front edge. A thread locking edge 39 is provided. The thread locking edge 39 has a width a in front of the trough of the wedge-shaped cutout, which is larger than a width b in the back from the trough, and a length L from the trough of the long piece 38 to the board to which the guide rod is attached. By making the length l from the trough of the short piece 39 to the substrate longer, the thread cutting collar 3 of the bobbin 2 can be cut as shown in FIGS. 13 to 16.
When the thread hooking guide 33 advances so as to sandwich the thread, the thread Y caught between the respective thread locking edges 39 of the bifurcated piece is introduced deeply into the thread cutting groove 4 of the thread cutting collar 3, and the supply side thread is The hook sheet 16 (for example, a male member of a hook-and-loop fastener) adhesively fixed to the circumferential surface of the thread cutting collar 3 on the bobbin side is held by the thread cutting blade 15 while being pulled and pressed against the thread cutting blade 15, thereby reliably cutting the thread at that portion. At the same time, the thread end on the supply side is gripped by the surface of the hook sheet 16 to obtain a stable threading state, and the amount of waste thread that is cut and suctioned and removed by the suction port is controlled by the cutting collar and the suction port located corresponding to the cutting collar. This is the minimum amount depending on the distance between them. FIG. 13 shows a state in which the guide rod 45, to which the threading guide 33 is fixed at the tip, is in the advancing process, rotates counterclockwise in the advancing direction, and the threading guide 33 has reached so as to sandwich the thread cutting collar 3. 14 is a side view of the long piece 38, in which the thread locking edge of the long piece 38 extends deeply, and the yarn caught in the valley of the thread locking edge is caught in the thread cutting collar 3. in contact with the periphery. FIG. 15 is a side view showing a state in which the thread cutting collar 3 rotates, locks the thread in the thread cutting groove 4, and cuts the thread with the thread cutting blade 15 protruding in the direction of rotation.
FIG. 16 is a front view thereof, showing the state in which the supply-side yarn end is held on the hook sheet 16 surface of the hook-and-loop fastener at the time the yarn is cut. FIG. 17 is a front view of the state in which a transfer tail is formed on the bobbin 2 at the beginning of winding, and at this point the guide rod 45 begins to retreat.

In addition, in FIG. 12, a thread guide 50 made of a wear-resistant hard alloy or ceramic is inserted and bonded into the valley of the wedge-shaped notch of the thread locking edge 39 of the thread hooking guide 33 shown in FIG. 11, which is extremely preferable. It is used.

As explained above, according to the present invention, threading when replacing the bobbin of a thread winding machine can be carried out extremely smoothly, reliably, and quickly, the mechanism is simple, and the automatic doffing process of the thread winding machine is efficient. The contribution it makes to the development of society is significant.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a side view showing the relationship between a movable trolley equipped with the threading device of the present invention and a thread winding machine, FIG. 2 is a plan view thereof, and FIG. The figure is a front view of the movable cart side, Figure 4 is a perspective view of the main parts showing the relationship between the thread guide and the traverse guide tube, Figure 5 is a front view of the thread guide, and Figures 6 to 8 are Each perspective view shows the threading operation process, Fig. 9 is a perspective view of the oiling device, Fig. 10 is a working state diagram of the oiling device, Fig. 11 is a perspective view of the threading guide, and Fig. 12 is a perspective view of another thread. A perspective view of the threading guide, Fig. 13 is an explanatory front view of the threading guide in a state where it has reached the thread cutting collar, Fig. 14 is a side view thereof, and Fig. 15 is an explanatory diagram of the state in which the threading guide is cutting the thread. FIG. 16 is a front view thereof, and FIG. 17 is a front view of the bobbin in a state where thread winding has begun. 1...Friction roller, 2...Bobbin,
3... Thread cutting collar, 4... Thread cutting groove, 5... Traverse guide tube, 6... Decompression suction device, 7... Stopper, 8... Fixed thread guide, 13... Full bobbin, 15... Thread cutting blade, 16...Hook sheet,
20... Trolley, 21, 22, 23, 24, 25,
26...pressure cylinder, 30...thread pulling arm, 32...thread pulling guide, 33...threading guide, 37...short piece, 38...long piece, 39...
Thread locking edge, 40... Thread shifting guide, 43... Cutter portion, 45... Guide rod, 46... Connecting member, 47... Guide cylinder, 48... Guide groove, 49...
... Pin, 71 ... Fixing ring, 72 ... Thread guide receiving ring, 73 ... Coil spring, 75
...Intake port.

Claims (1)

[Claims] 1. In a bobbin winding machine that horizontally rotates a bobbin 2 fitted with a thread cutting collar 3 having a thread cutting groove 4 recessed in the periphery and a hook sheet 16 attached to the circumferential side of the bobbin 2 at one end, The bobbin 2 on the front
A traverse guide tube 5 that extends parallel to the traverse guide tube 5 and has an intake port 75 at a position corresponding to the yarn cutting collar 3, and a yarn that is transferred from the bottom to the top of the traverse guide tube 5 and is sucked into the intake port 75. Article Y
a thread pulling guide 32 that can be raised and lowered to raise and lower the thread Y above the traverse guide tube 5 to regulate the running path of the thread Y in a substantially vertical direction; and a thread threading guide that is made up of two forked pieces each having a thread locking edge at its front edge. 33 at the tip, and the guide rod 45 is moved in the axial direction from a position where the thread Y is caught, whose running path is regulated in the substantially vertical direction, to a position where the thread cutting collar 3 is held between the thread threading guides 33 A thread threading device for a thread winding machine, comprising a moving mechanism and a holding mechanism that rotates the thread Y, which captures the guide rod 45 around its axis during the movement process, to an angle where it intersects the thread cutting collar 3.