JPH042516B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for forming a tail in a yarn winder.

(Prior Art and its Problems) Generally, when a synthetic fiber yarn is wound at a high speed, it is wound by a winding machine equipped with a traverse device having a plurality of blade traverse guides. When a preset amount of yarn has been wound, the yarn is removed from the blade traverse guide by the yarn guide and moved to the end of the bobbin.
After replacing the full bobbin with the empty bobbin, return the thread guide to the standby position. At this time, a tail is formed at the end of the bobbin.

In the above-described method of forming a tail using a thread guide, the speed of the blade traverse is faster than the moving speed of the thread guide, so the yarn engages with the blade traverse while the thread guide returns to the standby position. do. Therefore, when traversing to the standby position side of the thread guide until the thread guide returns to the standby position, the thread guide becomes the swinging fulcrum.
There were problems such as the yarn being handled and causing fuzz, fluctuations in the winding tension, and yarn breakage during unwinding in the post-processing process, as well as uneven weaving and dyeing.

(Objective) The present invention was achieved as a result of studies aimed at solving the above-mentioned problems and providing a method that can reliably form a tail.

(Means for Solving the Problems) That is, the present invention provides a yarn shifting guide that removes the yarn from a rotating blade traverse guide and conveys it to the end of the bobbin, and a yarn that holds the conveyed yarn in a predetermined position. Using a device consisting of a locking guide and a touch roller for surface pressure having a threaded groove for forming a tail at the end, the yarn was removed from the traverse guide by the yarn shifting guide and engaged with the yarn locking guide. After that, return the thread guide to the standby position, and then
A method for forming a tail in a winding machine is provided in which the thread is released from a thread locking guide and engaged with a threaded groove of a touch roller to form a tail at the end of a bobbin.

(Example) The configuration of an example of a tail forming apparatus for carrying out the tail forming method of the present invention will be described based on the drawings.

A bobbin mounting spindle 2 is rotatably mounted on a turret plate 1a rotatably installed on the machine base 1, and is rotated by an electric motor (not shown). A touch roller 4 is rotatably mounted on a movable frame 3 that moves up and down along the guide of the machine base 1, and has a threaded groove 4a at the end for forming a tail, and is attached to a bobbin 20 mounted on the spindle 2. They are brought into contact with a predetermined surface pressure. Reference numeral 5 denotes a frame attached to the movable frame 3, on which a plurality of blade guides 6 are rotatably attached, and as the blade guides 6 rotate, the yarn is reciprocated. Reference numeral 7 denotes a yarn shifting guide attached to a piston rod of a fluid cylinder 8 installed in the upper part of the frame 5, and is moved in the same direction as the traverse direction of the yarn. Reference numeral 9 denotes a yarn locking guide attached to a fluid cylinder 10 installed at the bottom of the frame 5, and the fluid cylinder 10 allows the yarn to be held in a state in which it is projected in a direction perpendicular to the traverse direction of the yarn. Then, the thread is guided along the same perpendicular line as the thread winding position of the bobbin 20.

A pipe having a solenoid valve for switching a pressure fluid supply path is connected to the fluid cylinders 8 and 10 described above. The spindle motor, electromagnetic valve, etc. are operated by a control device comprising an operation setting input circuit, a memory circuit, a comparison arithmetic circuit, an operation command circuit, etc., or a microcomputer.

The tail forming operation in the above winding machine will be explained based on FIGS. 1 to 4.

When a preset amount of yarn is wound onto the bobbin 20 (FIG. 4-1), a winding end operation signal is issued from a control device (not shown). Then, the turret plate 1a is rotated, the full bobbin 21 is moved to the doffing position, the empty bobbin 20 is moved to the winding position, and then, as shown in FIG. 4-2, the fluid cylinder 8
is activated to move the thread guide 7, and the thread traversed by the blade guide 6 is conveyed to the end of the bobbin 20. Then, when the yarn is conveyed to a predetermined yarn winding position, the fluid cylinder 10 is activated and the yarn locking guide 9 is projected. Then, the fluid cylinder 8 is actuated to return the yarn shifting guide 7 to the standby position, as shown in FIG. 4-3, and the yarn is held in the yarn locking guide 9. When the thread hooking device (not shown) is operated in this state and the thread is wound around the empty bobbin 20 as shown in FIG. 4-4, the fluid cylinder 10 is operated and the thread locking guide 9 is It is retracted and the thread is released. Then, as shown in FIGS. 4-5, the yarn moves toward the traverse center position of the blade traverse device 5 while contacting the circumferential surface of the touch roller 4. At this time,
The yarn engages with the threaded groove 4a of the touch roller 4 to form a tail on the bobbin 20. Next, when the yarn moves to the traverse area, it engages with the vane guide 6 and is traversed and wound around the bobbin 20. .

The tail forming method of the present invention can also be applied to a winding machine configured to replace a fully wound bobbin with an empty bobbin by an operator or a doffing device, and perform a threading operation.

(Effects of the Invention) As described above, the present invention provides a thread shifting guide that removes the thread from the rotating blade traverse guide and transports it to the end of the bobbin, and a thread locking guide that holds the transported thread in a predetermined position. and a touch roller for surface pressure having a threaded groove for forming a tail at the end, the yarn is removed from the traverse guide by the yarn shifting guide and engaged with the yarn locking guide. The following effects can be achieved by returning the shifting guide to the standby position, then releasing the thread from the thread locking guide and engaging the threaded groove of the tatsuchi roller to form a tail at the end of the bobbin. .

(1) Since the tail forming operation is performed with the yarn guide returning to the standby position, the yarn after the tail is formed does not come into contact with the yarn guide, and the yarn in the innermost layer after the tail is formed has fuzz, fuzz, etc. It is possible to prevent tension spots from occurring.

(2) Since the tail is not formed using the return movement of the thread guide, the tail can be reliably formed by the threaded groove of the touch roller.

[Brief explanation of drawings]

FIG. 1 is a schematic front view showing one embodiment of a winding machine for implementing the tail forming method of the present invention.
FIG. 2 is a view taken along the Z arrow in FIG. 1. FIG. 3 is a schematic plan view of FIG. 1. FIG. 4 is a schematic diagram showing the sequence of tail forming operations of the present invention. 2: spindle, 4: touch roller, 5: frame, 6: blade guide, 7: thread guide, 9: thread locking guide, 8, 10: fluid cylinder.

Claims (1)

[Claims] 1. A thread shifting guide that removes the thread from the rotating blade traverse guide and transports it to the end of the bobbin, a thread locking guide that holds the transported thread in a predetermined position, and a threaded groove for forming a tail at the end. Using a device consisting of a tatsuchi roller for surface pressure,
After the yarn is removed from the traverse guide by the yarn shifting guide and engaged with the thread locking guide, the yarn shifting guide is returned to the standby position, and then the yarn is released from the yarn locking guide and inserted into the screw groove of the tatsuchi roller. A method for forming a tail in a winding machine, characterized in that the tail is formed at an end of a bobbin by engaging the end of the bobbin.