JPH01317964A - Winder and thread switching method for same - Google Patents

Abstract

PURPOSE:To prevent entanglement of the thread in the winder in which a traverse mechanism and a pressure mechanism are formed in the upper side or in the lower side of a bobbin holder, by forming an injection mechanism of compressed air in the upper side or in the lower side of the traverse mechanism. CONSTITUTION:When a predetermined amount of thread is wound up on a bobbin 20A, instruction for the switching of the thread is output from a control unit which is not indicated in the figure. A turret 2 is revolved in the direction of an arrow (a), and the fully wound up bobbin 20A in the winding position is replaced with an empty bobbin 20B in the raising position. At the same time, compressed air is injected from a nozzle 11, a thread switching mechanism 7 is actuated, and the thread engaged in a traverse guide 5a of a traverse mecha nism 5 is removed and moved to a switching position at the edge of a bobbin. When the empty bobbin 20B is abutted to a pressure roller 6, a thread guard mechanism 8 is actuated and the thread is wound on to the empty bobbin 20B. The winding is started and the fully wound up bobbin 20A is extruded from a bobbin holder 3A through an extruding mechanism 9, and the air injection is terminated. In this way, entanglement of the thread during switching can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a winder for winding synthetic fiber yarn, and a yarn switching method in the winder.

(Prior art and its problems) In general, when continuously winding synthetic fiber yarn spun from a spinning machine, a turret arm having a plurality of bobbin holders is rotatably provided, and a turret arm is provided above the bobbin holders. A turret type winder is used, which is equipped with a traverse mechanism and a contact roller. When a preset amount of yarn has been wound, the empty bobbin is rotated to a predetermined winding speed, and then the turret arm is rotated to doff the fully wound bobbin at the winding position. The empty bobbin at the doffing position is moved to the winding position to switch the yarn from the full bobbin to the empty bobbin. When the yarn is switched from a full bobbin to an empty bobbin, the yarn winding tension decreases over time. Therefore, the problem is that the yarn is attracted to the traverse mechanism surface from the gap between the pressure roller and the partition plate due to the accompanying air current generated by the rotation of the contact pressure roller and the traverse mechanism, and the yarn gets entangled with the traverse mechanism and damages the traverse guide. was there.

In addition, even with manual switching type winders, in order to doff a full bobbin and replace it with an empty bobbin, the suction gun suctions the yarn wound on the bobbin and threads it onto the empty bobbin. - The yarn winding force decreases over time. As a result, the yarn is sucked toward the traverse mechanism from the gap between the pressure roller and the partition plate due to the accompanying airflow generated by the rotation of the pressure roller and the traverse tim, causing the yarn to become entangled with the traverse mechanism and damage the traverse mechanism. There was a problem.

The above-mentioned phenomenon occurs in both a traverse guide reciprocated by a scroll cam roller and a vane traverse guide.

(Purpose) The object of the present invention is to prevent the yarn from being sucked toward the traverse device and becoming entangled with the traverse mechanism when switching yarns in a winder.

(Means for Solving the Problem) That is, the present invention provides a winding machine in which a traverse mechanism and a contact pressure roller are installed above or below a bobbin holder, in which a winder is provided below or above the traverse smear! A compressed air injection mechanism is provided to inject compressed air when switching from a fully loaded bobbin to an empty bobbin to prevent the yarn from becoming entangled in the traverse mechanism due to the accompanying airflow caused by the rotation of the contact pressure roller.

(Example) The structure of one example of the turret type winder of the present invention will be described based on the drawings.

A turret arm 2 has a pair of bobbin holders 3A and 3B, and is rotatably mounted on the machine base 1.

Then, when a preset amount of yarn has been wound, the drive device switches to an empty bobbin! (not shown) rotates 180° in the direction (A) as shown in FIG. 4
is a movable frame that moves along the guide of the machine base 1, and is moved up and down by a fluid cylinder (not shown) or the like. A traverse mechanism 5 is attached to the movable frame 4 to traverse the yarn using a plurality of blade traverse guides 5a. 6 is a contact pressure roller, which is rotatably mounted on the movable frame 4 so as to be located close to the bottom of the traverse am;
It is brought into contact with the bobbin 20 tightly attached to the bobbin holder 3 with a predetermined surface pressure. The contact pressure roller 6 is rotated by contacting the bobbin tightly attached to the bobbin holder 3, or by a separate driving device.

Reference numeral 7 denotes a yarn switching device which removes the yarn from the traverse guide and moves it to the end of the bobbin, and is installed at the top of the traverse mechanism 5. Reference numeral 8 denotes a thread hooking mechanism for winding the yarn around the empty bobbin, and is rotatably mounted on the movable frame 4. 9 is a bobbin extrusion mechanism that extrudes the fully wound bobbin 2OA in the doffing position from the bobbin holder 3. 10 is a header attached to the lower part of the traverse mechanism 5;
Three nozzles 11 for compressed air injection are formed. One or more nozzles 11 are provided so that compressed air is injected over the entire traverse area of the yarn. A pipe 12 having an electromagnetic valve 13 for switching the supply path of compressed air is connected to the header 10, forming a compressed air injection hole.

A drive device for rotating the electromagnetic valve 13 of the above-mentioned compressed air injection mechanism, the turret arm 2, and the bobbin holder 3 (not shown)
The operations are performed by an operation setting circuit, a memory circuit, a comparison calculation circuit,
This is performed by a control device consisting of an operation command circuit, a microcomputer equipped with these functions, or a control device that is a combination of an operation detection limit switch, a timer, and the like.

The yarn switching operation in the above-mentioned turret type winding machine will be explained.

When a preset amount of yarn is wound onto the bobbin 20A, a yarn switching operation start signal is output from a control device (not shown). Then, the turret arm 2 is rotated in the direction (A), and the full bobbin 2OA at the winding position is moved to the doffing position, and the empty bobbin 20B at the doffing position is moved to the winding position. When the turret arm 2 is rotated, the supply path of the electromagnetic valve 12 is switched, and compressed air is supplied to the header 10 and injected from each nozzle 11.

The compressed air injected from the nozzle 11 has a flow rate of 20 to 50 m/Sec and a flow rate of 500 m/Sec depending on the winding speed, yarn thickness, etc.
~15004! It is necessary to set it appropriately within the range of /nin.

When the injection of compressed air is started, the yarn switching mechanism 7 is activated to remove the yarn engaged with the traverse guide 5a of the traverse machine $115 from the guide 5a, and move the yarn to the yarn switching position at the end of the bobbin. will be moved to

When the empty bobbin comes into contact with the contact pressure roller 6, the thread hook 1111148 is activated to wind the yarn around the empty bobbin, and the fully wound bobbin 2OA is switched to the empty bobbin 20B. When yarn winding is started on the empty bobbin 20B, the bobbin extrusion mechanism 9 is operated and the fully wound bobbin 2OA is extruded from the bobbin holder 3A. When the fully wound bobbin 2OA is doffed by this operation, the solenoid valve 13 is activated to switch the supply path and stop the injection of compressed air from the nozzle 11.

In the above-described yarn switching operation, at least the turret 2 is rotated, and the yarn is changed from the fully wound bobbin 20A to the empty bobbin 2.
It is necessary to inject compressed air from when the winding is switched to 0B and yarn winding is started on the empty bobbin until the fully wound bobbin 20A is pushed out from the bobbin holder 3A.

The above-mentioned compressed air injection mechanism does not include the header 10, and the nozzle 1
1 and a pipe 12 for supplying compressed air can be directly connected to the nozzle 11, as shown in FIG.
The opening 11a is formed so that the spray is ejected substantially downwardly with respect to the circumferential surface of the contact pressure roller 6, so that the suction force does not act on the gap between the roller 6 and the nozzle 11 due to the accompanying airflow caused by the rotation of the contact pressure roller 6. You can also.

The above embodiment is for a turret type winder, but in the case of a manual type winder, compressed air is used before the yarn being wound is sucked into a suction gun for doffing a fully wound bobbin. This can be carried out by injecting compressed air, extruding the fully wound bobbin from the bobbin holder, and threading the empty bobbin, and then stopping the injection of compressed air.

In addition to the above-mentioned time when switching yarns, continuous injection of compressed air during yarn winding can prevent tension fluctuations or yarn entanglements due to yarn breakage, etc.; Considering cost increase, etc., it is preferable to inject it only when switching yarns.

(Effects of the Invention) As described above, the present invention provides traverse tI! above or below the bobbin holder! 1′! s and a winding machine equipped with a contact pressure roller, a compressed air injection mechanism is disposed below or above the traverse mechanism to prevent the yarn from getting entangled with the traverse mechanism, and the winding machine is equipped with At the time of switching, by injecting compressed air below or above the side of the traverse R, the yarn is sucked from the gap between the pressure roller and the partition plate, etc. by the accompanying airflow caused by the rotation of the pressure roller and the traverse mechanism. It is possible to prevent entanglement with the traverse mechanism.

[Brief explanation of the drawing]

FIG. 1 is a schematic front view showing an example of the turret type winder of the present invention, and FIG. 2 is a schematic side view. Figure 3 is a schematic enlarged view of the second part in Figure 1;
The figure is a view taken along the Y arrow in FIG. FIG. 5 is a schematic diagram showing the configuration of another compressed air injection mechanism. 1: R stand, 2: Turret arm, 3: Bobbin holder, 4: Movable frame, 5: Traverse mechanism, 6: Contact pressure roller, 7: Thread switching R
Horizontal, 8: Thread hook mechanism, 9: Bobbin extrusion mechanism, 10: Header, 11: Nozzle, 12: Pipe,
13: Solenoid valve, applicant: Toray Engineering Co., Ltd. Figure 2 Figure 3

Claims (1)

[Scope of Claims] 1) In a winding machine in which a traverse mechanism and a pressure roller are installed above or below a bobbin holder, the yarn can be prevented from becoming entangled with the traverse mechanism below or above the traverse mechanism. A winding machine characterized by being equipped with a compressed air injection mechanism that prevents this. 2) In a winding machine in which a traverse mechanism and a pressure roller are installed above or below the bobbin holder, compressed air is injected below or above the traverse mechanism when switching from a full bobbin to an empty bobbin. 1. A yarn switching method in a winding machine, characterized in that the yarn is prevented from becoming entangled in a traverse mechanism due to accompanying airflow caused by the rotation of a pressing roller, a pressure roller, and a traverse mechanism.