JPH0428813B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for starting a double-twisting machine for preventing yarn breakage during startup.

〓Prior art〓 A double twisting machine places a yarn supply package in a stationary state on a rotatable spindle, unwinds the yarn from the package, and twists the yarn by rotating the spindle. A balloon is placed around the yarn feeding package, the yarn is guided by a balloon guide, a yarn guide, a feed roller, etc., and the yarn is wound up as a winding package.

Due to the recent demand for high-mix, low-volume production, there are many types of yarn feeding packages, and packages with larger diameters have come to be used.

In the case of a double twisting machine, the yarn pulled out from the yarn supply package upon startup passes through the rotating disk below the yarn supply package and reaches the balloon guide.If the yarn speed is low, the yarn runs until the balloon expands. There were cases in which the yarn came into contact with the shoulder part of the yarn supply package during running, causing yarn breakage. This was particularly noticeable in the case of spun yarn. To deal with this, a package cover was installed around the yarn supply package in order to prevent the yarn pulled out from the rotating disk from touching the yarn supply package. A gap for the yarn to pass must be provided between the yarn supply package and the package cover, and between the package cover and the balloon control ring provided on the outer periphery of the package cover. Therefore, when attempting to increase the diameter of the yarn supply package, these become an obstacle and it is not possible to set a large diameter package. That is, problems such as a small amount of yarn being fed and difficulty in loading and unloading the yarn occurred.

<Problems to be Solved by the Invention> In view of the above points, the present invention can increase the diameter of the yarn feeding package that can be set, and
The purpose of this is to eliminate the occurrence of thread breakage described above.

〓Means for solving the problem〓 A balloon guide, which is movable up and down on the upper part of the spindle and located on the axis of the spindle in which the yarn supply package is inserted, is installed after the yarn starts being pulled out from the yarn supply package. At the start, the balloon guide is in a high position and its position is gradually lowered. After the balloon is generated, the balloon becomes larger and the balloon guide is lowered together with the yarn feeding package towards the yarn introduction port inserted into the spindle, and the yarn speed increases. Even if the balloon is small because of its small size, the bending angle of the yarn due to contact with the shoulder of the package is made small, so that the yarn pulled out from the yarn supply package does not come into contact with the shoulder of the yarn supply package.

〓Operation〓 The yarn pulled out from the yarn feeding package cage is guided into the spindle center hole from the yarn introduction port at the top, and as the spindle rotates, it is released in the axial direction from the rotating disk integrated with the spindle, causing ballooning around the package cage. While forming, the balloon guide is located above the spindle axis. When the yarn speed is slow immediately after the start of winding, the traveling yarn is wound up while contacting the shoulder of the yarn supply package, but at this time,
Since the balloon guide is located at a high position, the bending angle of the thread due to the contact is small. As the yarn speed gradually increases, the balloon becomes larger and there is no contact between the traveling yarn and the yarn supply package.

Therefore, the position of the balloon guide is lowered to such an extent that the yarn constituting the balloon does not come into contact with the yarn supply package. Repeat this step by step, and find the optimal position, 5 cm above the thread introduction port, which is inserted into the spindle.
lower to a certain extent.

〓Example〓 An example of an apparatus for carrying out the method of the present invention will be described below with reference to the drawings.

The double twisting machines 1a and 1b each constitute a unit including a yarn winding device, and two rows of a plurality of units constituting the unit are arranged back to back.

The double twisting machines 1a and 1b include a yarn feeding package 4, a tensor 5, and a balloon control ring 6 surrounding the yarn feeding package 4 (sometimes not installed), which are installed in a stationary state on a spindle 3 having a threading disk 2. A package cover (not shown) is provided as necessary.

Above the double yarn twisting machines 1a and 1b, there is a winding device comprising a balloon guide 8, a feed roller 9, a winding drum 10, a yarn guide 11, etc., which regulates the height of the balloon 7 by the yarn Y pulled out from the yarn supply package 4. are provided, thereby constituting one unit.

The yarn Y pulled out from the yarn supply package 4 passes through a tensor 5 (having a yarn introduction port), a threading disk 2, a balloon guide 8, a yarn guide 11, a feed roller 9, and is rotated in contact with a drum 10. The balloon guide 8 is wound up onto the paper tube 12, but the position of the balloon guide 8 is gradually lowered after the start of winding. Balloon guide 8 is guide lever 1
The guide lever 1 is integrally fixed to the tip of the guide lever 1.
3 is movable in the vertical direction by a lifting device 20.

The structure of the lifting device 20 will be explained below based on FIGS. 2 to 4.

A winding pulley 22 is fixed at each unit position on a shaft 21 installed through the full double twisting units arranged in parallel, and two belts 23a and 23b are screwed to the winding pulley 22, respectively. 24a,
24b. One belt 23a is connected to one unit including the twisting machine 1a via a tension pulley 25a, and the other belt 23b is connected to the other back-to-back unit including the twisting machine 1b via a tension pulley 25b.

A moving body 26 is fixed to the belts 23a, 23b, and the guide lever 13 is fixed to the moving body 26 via a base 27.

A groove 30 is formed by a pair of plates 28 and 29 at both ends of the movable body 26, and the groove 30 is fitted into an L-shaped rail 31 fixed to the main body, and the movable body 26 is attached to the belt 23a. It is made possible to move up and down along the rail 31 by winding up and unwinding.

Of the rails 31, a scale 32 is provided on the surface of at least the rail 31 of the machine end unit,
The current position of the moving body 26 in the vertical direction can be known. The shaft 21 is provided with a shaft rotation device (not shown).

Now, when the yarn feeding package 2 is newly inserted into the spindle 3 in the double yarn twisting machines 1a and 1b and the yarn feeding package 2 is to start winding onto the yarn tube 12, first, the motor of the winding shaft rotation device (not shown) is turned on. Rotate and raise the balloon guide 8 to the highest position. As a result, the bending angle θ of the yarn Y caused by the yarn Y coming into contact with the shoulder portion of the yarn supply package 4 increases.

Here, spindle 3 of double twisting machine 1a, 1b
As the rotation of the threading disk 2 increases, the yarn Y reaching the balloon guide 8 forms a ballooning 7 and breaks contact with the yarn supply package 4. The higher the position of the balloon guide 8 at the start, the longer the length of the thread between the balloon guide 8 and the threading disk 2, and the greater the mass of the thread, which makes it easier for the balloon to expand quickly.

When the balloon expands, the position of the balloon guide 8 is lowered accordingly to control the size of the balloon to become smaller.

The above control detects the rotational speed of the spindle by appropriate means, and transmits the detected value to the winding shaft 21.
The movable body 2 of the lifting device rotates the shaft 21 by feedback to the motor that rotates the
6 is gradually lowered, and the guide lever 1 is attached to the movable body 26.
3. Lower the balloon guide 8 which is integrated with the base body 27.

Once the balloon guide 8 descends to a predetermined position above the tensor 5, it remains at the same position.

〓Effects of the Invention〓 The method of the present invention is such that a balloon guide, which is movable up and down on the upper part of the spindle and located on the axis of the spindle in which the yarn supply package is inserted, is installed after the start of pulling out the yarn from the yarn supply package. , the position is gradually lowered, and after the balloon is generated, as the balloon becomes larger, the balloon guide is lowered together with the yarn supply package toward the yarn introduction port inserted into the spindle, and the yarn pulled out from the yarn supply package is placed on the shoulder of the yarn supply package. By avoiding contact with the yarn, it is possible to reduce the bending of the yarn that hits the shoulder of the yarn supply package cage until the balloon expands at the start.
Even if it takes time for the balloon to expand, the occurrence of thread breakage can be reduced.

Further, as the spindle rotation speed increases, the balloon guide is lowered to make the balloon smaller, thereby eliminating the inconvenience of interference with adjacent units.

[Brief explanation of drawings]

Fig. 1 is a schematic side view, Figs. 2 to 4 show the lifting device, Fig. 2 is a side view, Fig. 3 is a front view, and Fig. 4 is a sectional view taken along the line of Fig. 3. . 3... Spindle, 4... Yarn supply package, 7
...Balloon, 8...Balloon guide.

Claims (1)

[Claims] 1. A balloon guide is installed above the spindle on the axis of the spindle in which the yarn supply package is inserted, and is movable up and down. After the yarn starts being pulled out from the yarn supply package, the balloon guide is placed in a high position at the time of startup. The position is gradually lowered, and as the balloon grows larger after the balloon is generated, the balloon guide is lowered together with the yarn supply package cage toward the yarn introduction port inserted into the spindle. A method for starting operation of a double-twisting machine, characterized by reducing the bending angle of the yarn due to contact with the shoulder.