JPS623742B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for preventing abnormal yarn splicing due to a drop in the pressure of supplied compressed air during yarn splicing in an automatic winder equipped with a pneumatic splicing device.

The yarn end to be spliced is sucked into the nozzle pipe, and compressed air is ejected into the nozzle pipe to untwist the yarn end, or the fiber at the tip of the yarn end is separated and removed to create a tapered yarn end shape, and then both are spliced. The pneumatic splicing device, which aligns the yarn ends in the splicing hole and splices the yarn using a swirling air flow, has many advantages over conventional yarn tying devices because of the beauty of the seams. By equipping an automatic winder with such a pneumatic splicing device, high quality yarn can be produced. During actual production, compressed air is supplied to the automatic winder from a compressor installed in the factory, but due to some reason, such as when some machines use a large amount of compressed air, temporary There may be cases where the supply pressure of compressed air decreases. At that time, the yarn ends were not untwisted and spliced using compressed air to the extent expected in a pneumatic splicing device, resulting in inconveniences such as abnormally thick or whisker-like protrusions near the seams. .

The present invention monitors the pressure of compressed air by installing a pressure switch on the pipe that supplies compressed air for each spindle of the automatic winder, or for groups of spindles, or for all spindles, and if the pressure falls below the set pressure, the corresponding This is to prevent the occurrence of abnormal seams by stopping the weights, groups, or all weights.

Next, an explanation will be given according to an example.

Figure 1 shows many automatic winders 1, 2, 3,...
. . . A control box 5 is provided at the right end, and an indicator light 6 is provided above the control box 5. As shown in FIG. 2, the compressed air piping extends from a main valve 7, a pressure switch 8, a mist separator 9, a pressure reducing valve 10 to a first pipe 11, and further passes through a pressure reducing valve 12 to a second pipe 13. The first pipe 11 and the second pipe 13 extend in the longitudinal direction of the automatic winder main body 4, and each have a joint 1.
4, 15 through flexible pipes 16, 17 to pneumatic splicing devices 18 of each automatic winder 1, 2, 3, . . . . Pneumatic splicing device 18
is arranged as shown in FIG. 3, and when a thread breakage occurs, the suction arms 19 and 20 suck and hold the bobbin side yarn YB and the package side yarn YP by a mechanism not shown, and guide them to the front of the pneumatic yarn splicing device 18. After this, the thread shifting levers 22, 2 which are pivotally supported on the shaft 21
3 and the thread presser lever 24 turn to guide the threads YB and YP toward the front plate 25. Then the thread YP
reaches the suction pipe 20 through the clamping device 26, the right groove splicing hole 28 of the fork guide 27, the yarn cutting device 29, and the right groove of the fork guide 30. On the other hand, the yarn YB passes through the clamp device 31, the left groove of the fork guide 30, the yarn splicing hole 28, the yarn cutting device 32, and the left groove of the fork guide 27, and reaches the suction pipe 19. Thereafter, the clamping devices 26 and 31 clamp the yarns YP and YB, and the yarn cutting devices 29 and 32 cut the yarns YP and YB. The cut yarn ends YP and YB are sucked into the adjacent nozzle holes 33 and 34, and are untwisted by high pressure compressed air from the first pipe 11 which is ejected into the nozzle pipe 35 as shown in FIG. Furthermore, the thread presser levers 22, 2
3 moves forward, and the yarn ends YP and YB are inserted into the nozzle holes 33 and 34.
The yarn is pulled out and aligned in the splicing hole 28.
This time, low-pressure compressed air from the second pipe 13 is blown into the splicing hole 28 to perform the splicing.

Normally the air pressure of first pipe 11 is 6.0Kg/
cm ² , the air pressure of the second pipe 13 is 4.5 to 6.0Kg/
^cm2 is considered appropriate. Therefore, the automatic winder main body 4
The compressed air pressure supplied to the pump is preferably 6.0 Kg/cm ² or more, and the pressure is monitored by the pressure switch 8. Normally, if the winding is below 5.0 kg/cm ² , there is no concern about the seams, so the automatic winder main body 4 is designed to stop when the winding is below 5.0 kg/cm ² . Furthermore, at that time, an indicator light 6 on the control box 5 lights up to notify that the main body has stopped. FIG. 5 shows a simple sequence diagram. When you press the start button PB2, the magnetic switch MC1
is becoming self-maintaining and operating automatically. When the compressed air pressure falls below the set pressure, the PS contact switches, the self-holding of MC1 is released, the machine stops, and the lamp RL lights up. After confirming that the pressure has recovered, press the start button PB2 again to enter automatic operation.

Although the pipe 36 has been described as the pipe in which the pressure switch 8 is provided, the pipe 11 and the pipe 1
6, pipe 37, pipe 38, etc. may be used.

As explained above, by providing a pressure switch in an automatic winder having a pneumatic splicing device, it is possible to prevent the formation of an abnormal seam due to an unexpected drop in pressure, and to ensure a highly reliable seam.

Furthermore, in the present invention, the pressure of the compressed air supplied to the untwisting nozzle pipe and the yarn splicing hole can be set independently, and the air required for untwisting and the compressed air necessary for splicing can be supplied depending on the yarn type. , it is possible to obtain a good seam from this point as well.

Therefore, it is possible to prevent defective seams caused by causes on the compressed air supply side.

[Brief explanation of the drawing]

Fig. 1 is a front view of an automatic winder body having many automatic winders, and Fig. 2 is an explanatory diagram showing compressed air supply piping to each automatic winder.
FIG. 3 is a front view showing the pneumatic splicing device provided in each automatic winder, FIG. 4 is a sectional view showing the vicinity of the nozzle pipe, and FIG. 5 is a sequence drawing of the pressure switch section. 1, 2, 3... automatic winder, 8... pressure switch, 18... pneumatic splicing device, 11... first pipe, 12... pressure reducing valve, 13... second pipe,
16, 17... Pipe, 28... Yarn splicing hole, 35... Untwisting nozzle pipe, 36, 37, 38... Pipe.

Claims (1)

[Claims] 1. The yarn ends to be spliced are sucked into the untwisting nozzle pipe, compressed air is jetted into the nozzle pipe to untwist the yarn ends, and then the yarn ends are aligned in the yarn splicing hole using a swirling air flow. In an automatic winder having a pneumatic yarn splicing device, a first pipe and a second pipe are arranged along the longitudinal direction of the winder, and the first pipe has a pipe connected to a compressed air supply source. is connected, and a pressure reducing valve is provided in the middle of the pipe connecting the first pipe and the second pipe, the first pipe and the yarn end untwisting nozzle pipe are connected by a pipe, and the second pipe and the yarn joining hole are connected to each other by a pipe. and a pressure switch is provided in the middle of the pipe on the compressed air supply source side connected to the first pipe,
An automatic winder having a pneumatic yarn splicing device, characterized in that it has a control circuit for stopping the winder, which is activated when the pressure switch becomes lower than a set pressure.