JPS5930813B2 - How to combine and twist pot-type filament - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a filament twisting device,
More specifically, the present invention relates to an improvement in a twisting method using a rotary pot, in which the yarn is once wound up while being heated on the inner wall of the rotary pot, and is guided outside and wound again without doffing.

A generally known method for forming a twisted yarn is a method of winding the yarn while heating it in a pot.

Furthermore, the yarn wound in the pot is held as it is without doffing, and then the yarn is sent out from the supply roller.

A method of twisting and winding the material while pulling it out together with the winding is proposed in Japanese Patent Publication No. 11182/1982 and Japanese Patent Application Laid-open No. 85832/1983.

That is, a first step of temporarily retaining the fiber bundle sent out from the supply roller in a heated state in a rotating pot;
Next, the fiber bundle fed from the supply roller is used as a core axis, and the yarn retained in the rotary pot is unwound and wound, and the steps of pulling out and winding are repeated alternately to obtain a twisted yarn.

In such a twisting method, the switching operation from the second step to the first step is performed manually, which requires a great deal of labor and makes weight management difficult.

The purpose of the present invention is to provide a device that can efficiently and automatically switch from the second process to the first process, and an improved device that can easily handle the occurrence of abnormal thick threads during the second process. It is.

The present invention has the following configuration to achieve the above object.

That is, in a filament yarn twisting method using a rotating pot that unwinds, winds and pulls out the yarn that is kept in a heated state in the rotating pot as a filament core shaft fed from a supply roller, A yarn thickness detector for detecting the thickness of the combined and twisted yarn and a yarn cutting device are installed between the rotating pot and the combined and twisted yarn winding device, and a yarn cutting device is installed to detect when the yarn in the rotating pot has run out. The thickness of the yarn is detected by the yarn thickness detector, and the yarn cutting device is activated by the detection signal to cut the yarn, thereby automatically placing the cut end of the yarn fed from the supply roller into the rotating pot. This is a pot-type filament yarn twisting method characterized by feeding.

The first characteristic of the present invention as described above is that during the second step, the thickness of the running yarn between the rotating pot and the take-up roller is constantly detected, and the thickness of the yarn held in the rotating pot is detected. (When this happens, only the filament yarn is sent in from the supply roller, and the thickness of the yarn is halved. This is considered to be the end of the plying and twisting process, and the single yarn running in the area between the rotating pot and the take-up roller is removed. The point is that it can be configured to cut automatically.

The supply side portion of the filament thread cut in this way is swung around by the rotational force of the rotating pot, and the filament thread end is returned to the rotating pot and attached to the inner wall by the action of centrifugal force. A first step is started in which the filament yarn fed from the supply roller is wound while being given a first twist.

Another feature of the present invention is that during the second step, depending on the conditions, when the yarn retained in the rotary pot is unwound, it may come out along with other yarns.
Abnormally thick threads, 6 threads, sometimes 8 threads, may occur, but if this condition continues, it is not only extremely dangerous, but also may cause damage to the device. When a yarn thicker than the normal plied yarn is detected, it can be configured to automatically cut the thick yarn running in the intermediate area between the half-speed rotary pot and the take-up roller. .

Note that it is desirable to be able to simultaneously stop the supply of filament yarn and stop the rotating pot based on this abnormally thick yarn detection signal.

As mentioned above, in the present invention, the tolerance range of the yarn thickness detector is 0.5D in principle based on the yarn thickness D during normal plying and twisting.
The yarn thickness detection position may be set downstream of the rotary pot and upstream of the take-up device, either between the take-up roller or between the take-up roller and the take-up device. Can be installed at any location.

Normally, filament yarns made of man-made fibers have extremely small thickness variations in the longitudinal direction compared to spun yarns, so it is sufficient to set the yarn thickness detector slightly larger than the lower limit of 0.5D in the allowable range. can be accomplished.

The present invention will be described in detail below with reference to the drawings.

Figure 1 shows the first step of first twisting, and shows the supply rollers 1 and 1.
The filament yarn 2 fed by ' is introduced into the rotary pot 4 via the traverse tube 3.

The rotary pot 4 is supported by a bearing 5 and driven by a transmission belt 6.

The traverse tube 3 is configured to be able to reciprocate up and down by a traverse device (not shown).

Therefore, the filament yarn 2 introduced into the rotating pot 4
is wound on the inner wall of the rotary pot 4 without being given a first twist.

Therefore, during the first step, there is no particular need to operate the take-up rollers 7, 7' and the winding device 9, and it is sufficient to utilize this period to perform the doffing operation.

After the first step is carried out for a certain period of time and a certain amount of yarn 2' is deposited in the rotary pot 4, as shown in FIG. The fed filament yarn 2 is pulled out downward via take-up rollers 7 and 7', giving it a top twist in the opposite direction to the bottom twist, forming a combined twisted yarn 8, and the second process is started, and the winding device 9, the twisted yarn is wound.

Here, the means for starting the second step is not particularly limited (for example, by inserting a take-out rod (not shown) from below the center of the rotary pot 4, the step can be switched relatively easily.

Figure 3 shows the state in which the yarn 2' retained in the rotary pot 4 has disappeared and only the filament yarn 2 fed from the supply rollers 1 and 1' has been replaced, and the second twisting process has been completed. .

The present invention is an apparatus that automatically switches from the second process to the first process by utilizing changes in the thickness of the yarn as described above.

That is, as shown in FIG. 3, the rotary pot 4 and the take-up roller 7
．． A yarn thickness detector 10, 1σ and a yarn cutter 12 are provided between the thread 7' and the yarn thickness detector 10, 1σ, and a yarn cutter 12 so that these can be interlocked.

Then, when the second step is completed and the double yarn state changes to single yarn, the thickness of the yarn becomes half, so this is detected by the detector 10, 1σ, and the yarn cutter 12 is activated via the control circuit 11. The running filament yarn 2 is cut.

The feed side end of the cut filament thread 2 is called back into the rotating pot 4 by the action of centrifugal force and attached to the inner wall of the rotating pot 4, and the first step as shown in FIG. 1 is repeated. .

As mentioned above, the thickness of the normal plied yarn is reduced by half, but next we will discuss the case where the yarn thickness is several times the thickness of the normal plied yarn.

As shown in Figure 4, during the twisting process, the rotary pot 4
Depending on the conditions, when unwinding the threads 2' held in the thread, other threads may be brought along with them, resulting in abnormal threads 13 such as 4 to 8 threads. You can do the same.

That is, in this case, the yarn thickness detectors 10 and 10' detect that the yarn thickness is 1.5 times or more based on the thickness of the normal plied yarn 8, and the control circuit 11 The yarn cutter 12 is operated via the , and the abnormally thick yarn 13 is cut.

If the abnormally thick yarn 13 continues to be spun, a part of the device may be damaged and a major accident may occur. , 1' rotation stop or supply roller 1, 1
It is desirable to stop the supply of the filament yarn 2 by operating a cutter (not shown) provided upstream of the rotary pot 4 and to stop the rotary pot 4 at the same time.

As described above, the present invention provides a device for detecting the thickness of the yarn between the pot and the winding device.
The purpose of the present invention is to provide a device that automatically switches processes and enables treatment in the case of occurrence of abnormally thick threads.

In the yarn thickness detector 10.10' of the present invention, the allowable thickness range of the normal plied yarn 8 exceeds 1/2 of the normal thickness.
．． less than 5 times.

The yarn thickness detectors 10, 10' can easily be of a photoelectric type, a capacitance type, or a pneumatic type, and are not limited to the illustrated embodiment.

Regarding its mounting position, the rotary pot 4 is attached to the take-up roller 7.
7', but not limited to the take-off roller 7.7
Needless to say, it may be installed between the winding device 9 and the winding device 9.

The present invention is a rotary pot type yarn twisting device that is capable of automatically and instantaneously switching from the end of the twisting process to the final twisting process, thereby contributing to the efficient repetition of the process and the elimination of manpower. In addition, the present invention provides a plying and twisting device that can handle the occurrence of abnormally thick yarns, thereby contributing to accident prevention.

[Brief explanation of the drawing]

FIG. 1 shows the first step of first twisting, and FIG. 2 shows the second step of normal twisting. Figure 3 shows the supply roller 1 running out of yarn in the rotating pot 4.
, 1' shows a state in which only the filament yarn 2 is fed in, and FIG. 4 shows a state in which an abnormally thick yarn 12 is generated. 1.1 supply roller, 2: filament yarn, 3 Ni rubber tube, 4: rotating pot, 7°7': take-up roller, 8: normal twisted yarn, 9: winding device, 10, 10':
Yarn thickness detector, 12: Yarn cutter, 13: Abnormally thick yarn.

Claims (1)

[Claims] 1. In a filament twisting method using a rotating pot that unwinds and pulls out the yarn that is heated and retained in a rotating pot with the yarn sent from a supply roller as the core axis, the rotating A yarn thickness detector for detecting the thickness of the combined and twisted yarn and a yarn cutting device are installed between the pot and the combined and twisted yarn winding device, and a yarn cutting device is installed to detect the yarn thickness in the rotating pot. The thickness of the thread is detected by the thickness detector, and the thread cutting device is activated by the detection signal to cut the thread, thereby automatically feeding the cut end of the thread fed from the supply roller into the rotary pot. A pot-type filament yarn twisting method characterized by: