JPS6158385B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a yarn winding device. More specifically, in a device that draws and separates the yarn into a non-twisted state and winds each divided yarn into its own pirn, the yarn speed is adjusted by gradually decreasing the spindle rotational speed as the pirn winding diameter increases. The present invention relates to such a yarn winding device.

In general, fiber splitting is performed using an unwinding method (generally called the cross-cutting method) in which the package is unwound while rotating the package perpendicularly to the axis of the yarn feeding package (package around which the yarn is wound before splitting...original yarn package). It has been adopted. In this unwinding method as well, there are two methods: actively unwinding the yarn by rotating the package by another drive source, or passively unwinding the yarn by rotating the package using the winding tension. There is a way. Regardless of the method, various devices and methods have been proposed for keeping the unwinding tension constant.
Further, as a splitting yarn winding device, there is a method of winding a large number of winding pirns horizontally in parallel, or a method of winding with a vertical spindle.

On the other hand, in recent years, advances have been made toward higher speeds and larger packages in order to increase productivity. In high-speed fiber splitting machines with a winding speed of 1000 m/min or more, it is difficult to increase the speed by arranging a large number of winding pirns horizontally because both ends of the pirn are supported by shafts. A spindle winding method is preferred. To wind a yarn with a vertical spindle, the yarn traverse is first started at a certain amplitude, this amplitude is gradually decreased, and finally the yarn is wound at a constant amplitude. A warp wind method is commonly used.

In a warp wind type winding device, if the spindle rotation speed of the winding pirn is constant, the winding speed at the start of fiber separation is slow, and as the fiber separation progresses and the winding diameter increases, the winding speed increases. Winding tension increases. Fluctuations in this tension not only adversely affect the winding shape of the winding pirn, but also in the case of fiber splitting, such tension fluctuations affect the splitting point, making it impossible to split the fibers.

Furthermore, it has been known in the art to reduce the number of rotations of the spindle in accordance with an increase in the winding diameter of a winding pirn in a draw-twisting machine or the like. In this case, the rotational speed of the motor is generally changed according to a preset program. Such spindle control has the disadvantage that the program must be set each time winding is to be carried out under different conditions, and the machine itself is very expensive.

The present invention aims to eliminate the above-mentioned defects of the prior art, and detects an increase in the winding diameter from a device that regulates the traverse width, and automatically controls the spindle rotation speed based on the detected increase in the winding diameter. It is an object of the present invention to provide a winding device capable of winding a homogeneous divided yarn without any tension fluctuation in each divided yarn during division and without yarn breakage.

In order to achieve the above object, the yarn winding device according to the present invention has the following configuration. In other words, in a warp wind type yarn winding device in which the winding width is regulated by the interval between two limit switches, and the limit switch gradually moves as the winding progresses to change the interval between the two limit switches, the winding The spindle is driven by a motor via a suitable transmission and continuously variable transmission;
The speed changing mechanism in the continuously variable transmission is connected to a mechanical transmission mechanism that transmits the displacement movement of the winding width regulating limit switch, and the speed changing mechanism changes the winding diameter by the displacement movement of the winding width regulating limit switch. It is characterized in that the winding spindle is operated so that the rotational speed of the winding spindle gradually decreases as the winding speed increases.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on an embodiment of the invention shown in the drawings, but the invention is not limited to the embodiment shown in the drawings.

1 and 2 are schematic diagrams of a winding device according to the present invention. In FIG. 1, reference numeral 2 is a winding width regulating limit switch, which is held by limit switch holders 3 and 3' having right-hand and left-hand threads, respectively, and kneading holders 3 and 3' are held by right-hand and left-hand threaded limit switch holders, respectively. It is inserted into a winding width regulating limit switch holder feed screw 1 with a left-hand thread. By gradually rotating the feed screw 1 by an appropriate means, the winding width regulating limit switch 2 held by the limit switch holders 3, 3' moves, and the interval therebetween gradually narrows as the winding diameter increases. To rotate the feed screw 1,
For example, by fixing a ratchet on the upper end of the feed screw 1,
It is possible to use a solenoid energized at appropriate time intervals during winding to operate the feed pawl to rotate the ratchet and thus the feed screw 1, or to use any other suitable means known in the art.

One limit switch 3 is connected via a rod 4 to one arm of a bell crank 6 rotatably attached to a pivot 5 fixed to the machine base. Both ends of the rod 4 have fork-like ends 4',
4'', and each fork-like end 4', 4'' is connected to a limit switch 3 by pins 7, 8, respectively.
and a bell crank 6. The other arm of the bell crank 6 is connected to a bracket 12 via a rod 9. The end of the rod 9 on the bell crank 6 side is a fork-shaped end 9'.
It is connected to the bell crank 6 by a pin 11. The other end 9'' of the rod 9 is connected to the bracket 12 by a pin 13.

Bracket 12 is pivotally mounted to machine frame 14 as shown in FIG. Bracket 12 supports motor 15. The output shaft of motor 15 drives the winding spindle via suitable continuously variable transmissions and transmissions known in the art. In the illustrated embodiment, a belt type is used as the continuously variable transmission, and the variable diameter pulley of the continuously variable transmission is attached to the output shaft of the motor, and the belt 17 is attached to the output shaft of the motor.
Power is transmitted to the driven pulley 18 via. The driven pulley 18 is supported on one end of a rotatable shaft 19, and another pulley 21 is attached to the other end of the shaft 19. The pulley 21 is a winding spindle 23
The drive belt 22 that is hooked around the pulley 21 serves as a driving pulley for each winding spindle.
4 to rotate the winding spindle 23.

FIG. 1 is a diagram showing a state before winding of the split yarn is started, and an empty bobbin 25 is attached to the winding spindle 23. FIG. 2 is a diagram showing a state immediately before the end of winding, that is, a state in which the fully wound pirn 26 is wound up. The operation of the apparatus of the present invention will be explained with reference to FIGS. 1 and 2.

When winding is started, each split yarn is attached to the spindle 23.
The material is wound onto a bobbin 25 mounted on the bobbin 25. The traverse device (not shown) has a limit switch operating piece attached to the ring rail or traverse bar, and when the limit switch operating piece operates a winding width regulating limit switch, the ring rail or traverse bar is raised or lowered. It may be a structure. As described above, in order to wind the yarn using the warp wind method, the winding width regulating limit switch feed screw 1 may be rotated. Feed screw 1 has a reverse thread, so feed screw 1
As the limit switches 2 rotate, the distance between the limit switches 2 gradually narrows, and the traverse width also gradually decreases. In the present invention, the vertical movement of the winding width regulating limit switch 2 is transmitted to the bell crank 6 through the winding width regulating limit switch holder 3 and the rod 4. This vertical movement is converted into horizontal movement by the bell crank 6, and by pulling the horizontally moving bracket 12 in the direction of arrow A (see Figure 2), the variable diameter pulley in the belt type continuously variable transmission is Distance between shafts of 16 and driven pulley 18
L ₁ (at the start of winding) is increased to L ₂ (at the end of winding), the transmission belt 17 of the continuously variable transmission is bitten into the variable diameter pulley 16, and the effective diameter of the variable diameter pulley 16 is reduced. Thereby, the rotational speed of the driven pulley 18 is reduced, and the driving pulley 21
The number of rotations of the spindle 23 rotated via the spindle drive belt 22 can be gradually decreased in synchronization with the movement of the limit switch 2 for regulating the winding width. Figure 4 is a diagram showing the relationship between pirn winding diameter, spindle rotation speed, and yarn speed.
The a line shows the yarn speed, the b line shows the spindle rotation speed, and the c line shows the pirn winding diameter. As shown in FIG. 4, the yarn speed is controlled to be approximately constant by gradually decreasing the spindle rotational speed as the pirn winding diameter increases. Here, even if the yarn speed is gradually increased or decreased within about 10% of the upper limit or lower limit of the standard yarn speed, it is permissible as this will not have an adverse effect on the splitting point.

Furthermore, when unwinding the yarn from the yarn bobbin, the unwinding tension changes due to tension fluctuations, i.e., the increase in rotational speed due to a decrease in the bobbin winding diameter, the rotational moment, etc., but there are generally known methods to prevent such fluctuations. It is only necessary to apply a brake device to the yarn bobbin that is currently being used, and when combined with the winding device of the present invention, even better effects can be achieved.

In the above-described embodiments, a belt-type continuously variable transmission is employed, but the continuously variable transmission is not limited to a belt-type, and any known suitable device may be used. In that case, as in the embodiment, the speed change mechanism in the continuously variable transmission (in the illustrated embodiment, this corresponds to the bracket 12 supporting the variable diameter pulley) is moved by the movement of the winding width regulating limit switch. All you have to do is change the ratio of rotational speeds on the driving side and driven side. For example, a continuously variable transmission is provided between two conical wheels (one conical wheel is connected to the driving side and the other conical wheel is connected to the driven side) and both conical wheels, and is in frictional contact with both conical wheels. When a continuously variable transmission device consisting of a circular wheel is used, the circular wheel may be moved by the movement of a limit switch for regulating the winding width.

In addition, in the illustrated embodiment, a rod, a bell crank, and another rod are used to transmit the motion of the winding width regulating limit switch to the speed change mechanism in the transmission, but this transmission mechanism is different from that of the embodiment. It is not limited and can be changed as appropriate.

According to the present invention, problems such as breakage of split yarns due to tension fluctuations can be solved, and instead of the conventional method of changing the motor rotation speed and gradually reducing the spindle rotation speed, a continuously variable transmission system is used. Since this is done by mechanically operating the speed changing mechanism, no electric circuit is required and it is very inexpensive.

The present invention is characterized in that the continuously variable transmission is activated by the movement of the traverse width regulating member for winding the yarn, and although the embodiments are explained with reference to a fiber splitter, it can be applied to a general winding device. It is obvious that the same can also be applied.

[Brief explanation of the drawing]

1 and 2 are schematic diagrams of an embodiment of the winding device of the present invention, with FIG. 1 showing the state before the start of winding, and FIG. 2 showing the state just before the end of winding. FIG. 3 is a partially sectional perspective view showing the vicinity of the motor support bracket in the apparatus shown in FIGS. 1 and 2. FIG. FIG. 4 is a diagram showing the relationship between yarn speed, spindle rotation speed, and pirn winding diameter with respect to winding time in the winding device of the present invention. 1... Limit switch feed screw, 2... Limit switch for winding width regulation, 3... Limit switch holder, 4... Rod, 6... Bell crank, 9... Rod, 12... Bracket, 15...
... Motor, 16 ... Variable diameter pulley, 17 ... Belt, 18 ... Driven pulley, 21 ... Driven pulley, 23 ... Winding spindle, 25 ... Bobbin, 26 ... Pern.

Claims (1)

[Claims] 1. In a warp wind type yarn winding device in which the winding width is regulated by the interval between two limit switches, and the limit switch gradually moves as winding progresses to change the interval between both limit switches, The spindle is driven by a motor through a suitable transmission and a continuously variable transmission, and a speed changing mechanism in the continuously variable transmission is connected to a mechanical transmission mechanism that transmits the displacement movement of the winding width regulating limit switch. A yarn winding device characterized in that the speed changing mechanism is operated so that the number of revolutions of the winding spindle gradually decreases as the winding diameter increases by displacement movement of a limit switch for regulating winding width.