JP2662478B2 - Traverse roller for metal cord - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method of winding a metal cord for various applications, which is made by twisting metal filaments, after manufacturing the same with a twisting machine, or a method of winding a wound cord to another reel. The present invention relates to a traverse roller used for correctly guiding a metal cord to a winding surface of a reel being wound when winding.

[0002]

2. Description of the Related Art When winding a linear body such as a fiber yarn or a metal wire on a reel, the reel is reciprocated in the axial direction of the reel in synchronization with the rotation of the reel in order to smoothly wind the winding surface uniformly and uniformly. A traverser that guides the linear body to the winding surface while moving is used. For example, a traverser equipped with a traverse roller is employed in a winding device of a twisting machine for manufacturing a metal cord for reinforcing rubber articles handled by the inventor. The traverse roller used for this traverser has a groove angle of 90 to 90 on the outer peripheral V groove for guiding the metal cord.
The groove bottom radius is designed to be about 1 to 3 times the diameter of the metal cord at 150 °.

[0003]

The quality of a metal cord wound on a reel using a conventional traverser is poor.
The inventors have determined that the cause is the traverse roller of the above-mentioned design. That is, unlike the fiber yarn or the single metal wire, the metal cord has torsional stress due to stranded wire processing (hereinafter referred to as residual twist), and has a twist at an angle. Since such a metal cord is wound while receiving a considerable amount of ironing at the roller portion, a conventional traverse roller that accepts this cord loosely (in a state in which there is room for movement) has a twist that is newly generated due to residual twist and ironing. Is repeatedly accumulated and released due to fluctuations in tension, changes in the state of contact with the rollers, and so on. It was found that the standard deviation and average value of the residual twist per length also became large.

[0004] The metal cord is squeezed at the roller portion because of a change in the feed direction between the final guide roller and the traverse roller due to the movement of the traverse roller and a slight delay compared to the traverse roller of the cord itself. It is considered that a major cause is that the cord oscillates on the roller due to movement or the like (the contact position with the groove surface changes).

The present invention is intended to solve the problem of quality deterioration during winding by devising the shape of the V-groove of the traverse roller, and further devising the arrangement of the roller.

[0006]

SUMMARY OF THE INVENTION According to the present invention, in order to eliminate the above-mentioned problems, a V-groove on the outer periphery of a traverse roller is provided.
The shape is to satisfy the following conditions a) and b).

A) R <D / 2 D: diameter of metal cord (mm) R: groove bottom radius (mm) b) 30 ° ≦ α ≦ 60 ° α: groove angle (°) When a plurality of traversers are provided and the metal cord is guided through each roller in order, the effect becomes remarkable. In this case, when a plurality of traverse rollers are arranged such that the total value of the contact angles of the metal cords to be wrapped with the individual rollers is 270 ° or more, a more excellent effect is exhibited.

[0008]

According to the above-described V-groove, the metal cord is supported from the bottom of the groove so as to be sandwiched between two side surfaces of the groove. At the time of actual winding, in this state, an appropriate winding tension is applied to the metal cord, so that the cord bites into the groove, and the restraining force due to the groove surface is increased. Does not occur, the ironing of the cord is avoided, and the accumulation and release of residual twist and the newly generated twist are eliminated.

In the traverser using a combination of a plurality of traverse rollers according to the present invention, the contact resistance of the metal cord increases as the number of rollers increases. In particular, the total value of the contact angle of the metal cord with each traverse roller is 270.
When the angle is set to a degree or more, the contact resistance is significantly increased, which is advantageous in improving the reliability of restraint.

[0010]

FIG. 1 shows an example of a traverse roller according to the present invention. As shown in the figure, on the outer periphery of the traverse roller 10, a V groove 11 having a groove bottom radius R of less than 1/2 of the diameter of the metal cord 3 and a groove angle α of 30 to 60 ° is provided.

The traverser provided with the traverse roller may be a known traverser which is guided by a guide skeleton, propelled by a ball screw mechanism, and reverses the moving direction at both ends of the inner width of the reel. Although not shown in the drawing, such a traverser is also employed in the double twisting wire machine of FIG.

The double twist twisting machine shown in FIG. 2 guides a plurality of metal filaments 1 to a twisting die 2 and a flyer 8.
After twisting twice by rotating the
Is adjusted, and the take-up capstan 6 performs take-off at a constant speed. After that, the traverse rollers 10 attached to the traverser pass through the guide rollers 7 and are wound on the take-up reel 9.

At this time, the traverse roller 10 repeatedly moves in the reel axis direction within the inner width of the reel, but since the guide roller 7 and the take-up reel 9 before and after the feed direction are kept at fixed positions, FIG. 2 (b) A position excluding the middle point of the inner width of the reel where the line feeding direction of the cord after passing through the final guide roller constantly changes within the range of the angle θ as shown by the chain line, and the line sending direction is orthogonal to the reel axis. As a result, a moving force in the axial direction of the reel acts on the cord. This force is also generated by the metal cord moving slightly behind the traverse roller, so that in the conventional V-groove shape that loosely accepts the metal cord, the contact position of the cord inevitably fluctuates left and right, Since the traverse roller of the present invention restrains the cord from both sides, this deflection does not occur. Therefore, the cord is not squeezed when passing over the traverse roller, and the cord is prevented from rotating by biting into the groove. Does not occur.

The results of the test for confirming the effect are described below.

A 1 × 5 × 0.25 single twist structure metal cord 3 shown in FIG.
The traverse roller was manufactured by changing the groove shape and the number of use, and the residual twist value of the metal cord after winding was examined. The manufactured metal cord has a diameter D = 0.67m.
m, twist pitch = 10 mm, twist direction is S twist. The twisting speed was tested at 76 m / min. Table 1 shows the measurement results for each of the 20 measurements.

[0016]

[Table 1]

[0017] The + sign in the table means that the twisting is performed in a direction in which the twist is tightened.

As can be seen from the test results, when the traverse roller of the present invention is used, the standard deviation of the residual twist becomes 0.35 or less, which is less than half of the conventional value, and the quality does not deteriorate due to winding.

[0019]

As described above, according to the traverse roller of the present invention, the groove bottom radius and the groove angle are reduced to restrict the twist and rotation of the metal cord on the groove side surface. Especially when using multiple combinations
It is possible to effectively prevent the phenomenon that the residual torsion and the newly generated torsion are accumulated and released during winding, thereby effectively maintaining the residual torsion in each of the longitudinal portions of the cord at a small value. This is extremely advantageous in terms of providing high-quality products and improving workability and efficiency during production or rewinding.

[Brief description of the drawings]

FIG. 1 is a side view of a traverse roller according to an embodiment.

FIG. 2 (a) is a schematic plan view of a double twisting and twisting machine employing the same roller, and FIG. 2 (b) is a side view showing a change in a wire feeding direction due to displacement of a traverser.

FIG. 3 is a cross-sectional view of a metal cord subjected to a winding test.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Metal filament 2 Twisting die 3 Metal cord 4 Turn roller 5 False twisting device 6 Take-up capstan 7 Guide roller 8 Flyer 9 Take-up reel 10 Traverse roller 11 V-groove

Claims (3)

(57) [Claims] 1. A traverse roller for guiding a metal cord to a rotating take-up reel while moving back and forth in the axial direction of the reel, wherein a V-groove on the outer periphery where the cord is applied has a shape satisfying the following conditions a) and b). A traverse roller for a metal cord, characterized in that: a) R <D / 2 D: diameter of metal cord (m
m) R: groove bottom radius (mm) b) 30 ° ≦ α ≦ 60 ° α: groove angle (°) 2. A traverser comprising a plurality of traverse rollers according to claim 1, wherein a metal cord is guided to a winding surface of a take-up reel via each traverse roller in order. 3. The method according to claim 1, wherein each traverse roller has a total contact angle of the metal cord to be lined with each roller of 27.
3. The traverser according to claim 2, wherein the traverser is arranged at a position which is equal to or greater than 0 °.