JPS6111164Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is an unwinding method in which the yarn wound around a flange bobbin is pulled out in the axial direction of the bobbin, by reducing the sliding resistance between the periphery of the flange and the yarn being pulled out. This invention relates to a novel unwinding assisting device that improves unwinding performance.

When thread is unwound and pulled out from a flange bobbin in its axial direction, when the thread is unwound from a layer of thread close to the flange that is being pulled out, the tension becomes excessive and various problems occur, and improvement measures are desired. That is, as shown in the sectional view of the flange bobbin in FIG. 1, a flange bobbin 2 having flanges 2a and 2b at both ends is mounted on a shaft 3 on a base plate 1. 4 and 5 are the yarn layers spread on top of it, 4 is the part that is relatively easy to unwind, and 5
This is a difficult part to unwrap because it is close to the flange 2a of the gag to be unwound. Therefore, when the yarn 6a is unwound from the yarn layer 4, the tension of the yarn 6a is small, but the yarn layer 5
When the yarn 6b is unwound, it is strongly rubbed against the periphery of the flange 2a, resulting in high tension. Therefore, the present inventor provided a ring 7 on the outer periphery of the flange 2a of the flange bobbin 2, as shown in the top view A and the sectional view (upper part) of FIG. Multiple injection ports 9a, 9b, 9c, 9
Air is injected onto the outer periphery of the flange 2a and the yarn layer 5 below the flange 2a from the flange 2a, etc. so as to swirl in the direction in which the yarns 6, 6a rotate for unwinding (in the direction of the arrow F).
A pipe 8 supports the ring 7 and supplies compressed air for injection into the ring 7. In this way, the yarns 6, 6a, which turn in the direction of the arrow for unwinding, are assisted in their rotation by the air turning in the same direction, and the unwinding resistance of the yarns 6a is significantly reduced.

FIG. 3 is a side view of an apparatus showing an example of an embodiment of the present invention. That is, a middle ring 7 is provided around the outer periphery of the flange 2a of the bobbin 2, and air is supplied from a compressed air tank 12 through a pipe 8.
A solenoid valve 13 is attached to the pipe 8. The yarn 6 pulled out from the yarn layers 4 and 5 of the flange bobbin 2 passes through a guide 10 and is pulled through a tension sensor (or tension adjustment device) 11 in the direction of arrow E. When the unwinding position approaches the yarn layer 5 and the tension (of the yarn 6) exceeds a predetermined limit, the sensor 11 sends a signal to the electromagnetic valve 13 via the electrical wiring 14, and the electromagnetic valve 13
is opened to send compressed air from the compressed air tank 12 into the ring 7. At this time, air is ejected from the injection ports 9a, 9b, 9c, and 9d as shown in FIG. As the air swirls, the unraveling will be helped to some extent. Therefore, there is no problem in unwinding even with yarn layer 5. When the tension decreases, the sensor 11 activates the solenoid valve 1.
3 closures are made. In this way, the unwinding of the thread from the flange bobbin was assisted and the previously occurring obstacles were completely eliminated.

In this embodiment, a compressed air injection method will be described, but air blowing by an electric fan or whirlwind may also be used.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the flange bobbin and its thread layer.
Figure 2 shows a top view A and a partial sectional view B of the device of the present invention installed on the outer periphery of the unwinding side flange of the flange bobbin.
FIG. 3 is a side view showing an example of an embodiment of the device of the present invention. 1... Base plate, 2... Flange bobbin, 2a...
Flange on the unwinding side, 2b...Flange on the unwinding side, 3...Shaft, 4... Yarn layer that is easy to unwind (on the unwinding side), 5... Yarn layer that is difficult to unwind (2a side) , 6... Unwinding thread, 6a... 4-strand unwinding thread, 6b... 5-strand unwinding thread, 7... Circular ring, 8... Pipe (for air supply), 9a, 9b, 9c, 9d...Injection port, 10
... Guide, 11 ... Tension sensor (tension adjustment device can also be used), 12 ... Compressed air tank, 13 ...
Electromagnetic valve, 14... Electrical wiring, F... Arrow in the direction of rotation of the unraveling yarn and air, E... Arrow in the direction of taking up the yarn 6.

Claims (1)

[Scope of utility model registration request] When the thread 6 is unwound and pulled out from the flange bobbin 2 in the direction of its axis 3, the flange 2 that is being pulled out
A ring 7 is installed outside the periphery of the ring 7, and when the yarn 6 is unwound, the yarn 6 is placed between the inner periphery of the ring 7, the outer periphery of the flange 2a, and the outer periphery of the yarn layer 5 near the flange 2a. This device is designed to swirl air in the unwinding rotation direction (in the direction of arrow F) to assist in unwinding yarn from a flange bobbin when unwinding is difficult.