JP2011256484A - Method and apparatus for manufacturing annular metal cord - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and a compact inexpensive apparatus for manufacturing a breakage-resistant annular metal cord of any diameter size.SOLUTION: An annular core cord is configured to pass through folding-back parts formed by a plurality of rollers provided in the circumferential direction of the annular core cord, and is subject to tension adjustment by means of a feeding roller and a brake roller which are provided respectively before and after a winding part, whereby the annular core cord is kept linear at the winding part while rotatably running in the circumferential direction so that a coil is wound circumferentially around the annular core cord at the winding part in a helical manner. Thus, a metal annular cord is manufactured.

Description

The present invention relates to an annular metal cord manufacturing method and manufacturing apparatus.

Metal cords are used to reinforce annular belts typified by belt conveyors and timing belts. Depending on the application, a large-diameter annular belt is used. Conventionally, a metal cord with ends is used to reinforce the large-diameter annular belt.

As an example of the annular metal cord, an annular metal cord represented by a cable bead of a rubber tire for a vehicle is known. As a cable bead manufacturing method, as described in Patent Documents 1 and 2, a winding reel that is rotatably supported by a fryer while rotating a core ring (a core wire formed in a circular shape) in the circumferential direction. The wire itself is not rotated (spinned), but is rotated (revolved) along the circumference of the core ring by passing through the inside and outside of the core ring by the rotation of the flyer, and the wire rod wound around the winding reel spirals around the core ring. It is known that it is manufactured by wrapping it around.

In the above-described conventional annular metal cord manufacturing method and apparatus for winding a wire rod around the core ring by revolving a winding reel that rotatably supports the flyer, the winding reel The mechanism such as a mechanism that revolves without rotating is complicated, the entire apparatus is expensive and large, and the rotation speed is limited, resulting in a slow production speed.

In order to solve the above-described problems, there is a manufacturing method and a manufacturing apparatus for an annular metal belt that are small, inexpensive, and can increase production speed, as described in Patent Document 3.

JP 50-135350 A Japanese Patent Laid-Open No. 51-35742 JP 2006-181832 A JP-A-4-307146

However, even in Patent Document 3, there is a problem that the apparatus becomes large and expensive in order to manufacture the annular metal cord as the diameter of the core ring increases.

Moreover, in the apparatus which manufactures a cable bead as described in patent document 3, it is necessary to be an arc-shaped annular metal cord. Therefore, while winding the core ring in the circumferential direction, the winding reel and the flyer were rotated coaxially, and the flyer roller supported rotatably on the flyer was rotated around the core ring, thereby being wound around the winding reel. In the method of manufacturing the metal annular cord by spirally winding the wire around the core ring, the winding is wound around the arc-shaped portion of the core ring as shown in FIG. It is difficult to make an adjustment to keep the winding angle with the part constant and to obtain a uniform twisted state in the entire ring.

Furthermore, the core ring in the winding portion is arcuate, and its position varies depending on the tension of the winding, making it difficult to stably wind the winding.

Moreover, when applying the metal cord of patent document 4 to a cyclic | annular metal cord, it is necessary to couple | bond both ends of a metal cord and to make it cyclic | annular. In that case, since both ends of the metal cord are brought into contact with each other and joined together, the joining portion is concentrated at one place in the circumferential direction, so that the breaking strength of the metal cord is lowered and breakage tends to occur.

The present invention solves such a problem, and provides a small and inexpensive method and apparatus for manufacturing an annular metal cord that is difficult to break and can produce an annular metal cord regardless of the diameter of the annular metal cord. The purpose is to provide.

In the method of manufacturing an annular metal cord according to the present invention, an annular core wire is passed through a folded portion by a plurality of rollers provided in a circumferential direction of the annular core wire, and further, a feed roller and a brake roller provided before and after the winding portion. By adjusting the tension, the annular core wire is rotated in the circumferential direction while the annular core wire in the winding portion is linear, and the winding is spirally wound around the circumference of the annular core wire in the winding portion. Is to be manufactured.

The apparatus for producing an annular metal cord according to the present invention is an annular metal cord for producing an annular metal cord by spirally winding a winding around the circumference of an annular core wire while rotating an annular core wire made of metal in the circumferential direction. It is a manufacturing device, and has a plurality of rollers capable of turning the ring in the circumferential direction, a pair of feed rollers and brake rollers capable of adjusting the tension of the core ring before and after the winding portion, and a winding device It is composed. In this manufacturing apparatus, a plurality of winding apparatuses may be arranged along a rotation direction of the core ring between a pair of feed rollers and brake rollers provided before and after the winding unit.

Using this manufacturing method and manufacturing apparatus, an annular metal cord can be manufactured by spirally winding a winding around the circumference of the annular core wire while rotating the annular core wire in the circumferential direction.

According to the present invention, by adjusting the roller position of the folded portion according to the circumferential length of the annular core wire, the length of the circumferential length of the annular core wire can be dealt with without changing the device, and the annular metal cord having a long circumferential length The apparatus is also small and inexpensive when manufacturing.

In addition, by giving tension to the annular core wire in the winding portion by the feed roller and the brake roller before and after the winding portion, the blurring of the annular core wire in the winding portion is reduced, and the figure is also corrected by straightening it. As shown in FIG. 5, since the angle between the annular core wire and the winding in the winding portion can be made constant regardless of the position inside and outside the circumference of the annular core wire, the number of rotations of the winding device can be increased and at a stable pitch. Can be twisted.

As is clear from the above description, according to the present invention, the entire apparatus is smaller and less expensive than the conventional apparatus, and the annular metal cord having a uniform twist pitch increases the rotational speed as compared with the conventional method. As a result, the production speed can be increased and the quality of the annular metal cord can be improved and the cost can be reduced.

It is a schematic plan view of the cyclic | annular metal cord manufacturing apparatus of embodiment of this invention. It is a schematic plan view of the winding apparatus in the cyclic | annular metal cord manufacturing apparatus of embodiment of this invention. It is a front view of the drive part of the winding apparatus in the cyclic | annular metal cord manufacturing apparatus of embodiment of this invention. It is a top view of the coil | winding part in the conventional cable bead manufacturing apparatus. It is a top view of the coil | winding part in the cyclic | annular metal cord manufacturing apparatus of embodiment of this invention.

1 to 3 show an example of an embodiment of the present invention. 1 is a schematic plan view of an annular metal cord manufacturing apparatus, FIG. 2 is a schematic plan view of a winding apparatus, and FIG. 3 is a front view of a drive unit of the winding apparatus.

In FIG. 1, 1 is a winding device, 3a and 3b are folding rollers, 4 is a feed roller, and 5 is a brake roller. A plurality of folding rollers 3a and 3b are arranged in the circumferential direction of the core ring, and their positions can be moved back and forth by a slide mechanism or the like. When manufacturing the thing with the long circumference of a cyclic | annular metal cord, the position of the folding | turning roller 3a should just keep away from the folding | turning roller 3b, for example. Further, the folding roller may be one that can move up and down.

The feed roller 4 and the brake roller 5 are arranged before and after the winding device 1. The feed roller is composed of one or more, preferably a pair of rollers, for example, a core ring feeding device composed of a pinch roller or any other mechanism, and the brake roller is composed of one or more, preferably a pair of or more rollers. It has a mechanism that can apply a brake in the direction opposite to the traveling direction of the core ring by the roller, and adjusts the tension of the core ring by the feed roller and the brake roller to make it linear.

In FIG. 2, 1 is a winding device. The winding device 1 is provided with a slit (not shown) for inserting the annular core wire into the device, and the winding reel 2 around which the winding W is wound rotates around the annular core wire to turn the winding W into the annular core wire. It has a mechanism to wind around.

In the winding device 1, a hollow rotary shaft 10 is rotatably supported on a device main body 18 via a pair of bearings 8 and 9, and brake plates 14 and 15 are arranged on the front end shaft of the hollow rotary shaft 10 in the front-rear direction. The wire reel 16 is loosely fitted, the flyer 17 is fixed to the front end, the winding reel 16 is sandwiched between the brake plates 14 and 15, and the flyer 17 rotates integrally with the hollow rotary shaft 10, The winding reel 16 and the flyer 17 are connected to each other so as to be slidable. A pair of flyer rollers 2 and 2 are rotatably supported by the fryer 17.

The pair of flyer rollers 2 and 2 are alternately used to wind a wire rod for winding in the opposite direction for each layer when manufacturing a multi-layered annular metal cord. In an annular metal cord having two or more layers, the winding direction is usually reversed for each layer. However, when the first layer and the second layer are wound in the same direction, one of the pair of flyer rollers 2 and 2 is sufficient. Therefore, it is possible to design one flyer roller per winding device.

This embodiment is manufactured by the following method using an annular metal cord manufacturing apparatus including the winding device 1, the folding roller 3, the feed roller 4, and the brake roller 5.

First, after passing the annular core wire 7 through the slit of the winding device 1, the feed roller 4, the brake roller 5, and the folding rollers 3a and 3b, the folding rollers 3a and 3b are arranged at positions corresponding to the length of the core ring, Secure the core ring.

Then, the tension between the feed roller 4 and the brake roller 5 of the core ring 7 is adjusted by operating the feed roller 4 by an electric motor (not shown) to rotate the core ring 7 in the circumferential direction and adjusting the brake roller brake. Adjust to a straight line. Further, the sag of the core ring 7 is eliminated by adjusting the positions of the folding rollers 3a and 3b as necessary.

Thereafter, the tip of the winding W from the winding reel 16 is fixed to the annular core wire 7, and the annular core wire 7 is rotated in the circumferential direction by a feed roller, while driving means including the drive gears 12, 13 and the driven gear 11. By rotating a winding reel 16 that is slidably connected via a fryer 17 and brake plates 14 and 15 by an electric motor (not shown), the flyer roller 2 that is rotatably supported by the fryer 17 is connected to the core ring 7. The wire rod W of the winding reel 16 is spirally wound around the circumference of the core ring 7 to produce an annular metal cord. And after fixing the edge part of the wire W to a cyclic | annular metal cord, each roller is loosened and a cyclic | annular metal cord is taken out.

Thus, the entire apparatus becomes small and inexpensive, and a small to large diameter annular metal cord having a uniform twist pitch can be manufactured at a high speed.

The embodiment has been described with reference to the illustrated example, but the present invention is not limited to this and can be implemented in various ways.

DESCRIPTION OF SYMBOLS 1 Winding device 2 Flyer roller 3a, 3b Folding roller 4 Feeding roller 5 Brake roller 6 Winding part 7 Core ring 8, 9 Bearing 10 Hollow rotary shaft 11 Driven gear 12, 13 Drive gear 14, 15 Brake plate 16 Winding reel 17 Flyer 18 Main unit W Wire

Claims (3)

In a method for producing an annular metal cord formed by winding a metal wire around an endless annular core wire made of metal, the annular core wire is passed through a folded portion by a plurality of rollers provided in the circumferential direction of the annular core wire, and the wound portion By adjusting the tension with the feed roller and the brake roller provided before and after the belt, the annular core wire is rotated in the circumferential direction while linearly rotating the annular core wire at the winding portion, and around the axis of the annular core wire. A method for producing an annular metal cord, characterized in that a wire rod is spirally wound around the core ring by a wire rod winding mechanism that rotates the wire. An annular metal cord manufacturing apparatus for manufacturing an annular metal cord by spirally winding a wire wound around a winding reel while rotating an endless annular core wire made of metal in a circumferential direction. And a plurality of rollers capable of turning the ring in the circumferential direction of the annular core wire, and a pair of feed rollers and a brake roller capable of adjusting the tension of the annular core wire before and after the winding portion, An apparatus for manufacturing an annular metal cord. The apparatus for producing an annular metal cord according to claim 2, wherein a plurality of the winding devices are arranged along a rotation direction of the core ring between a pair of feed rollers and brake rollers provided before and after the winding portion.