JPS628904Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an apparatus for manufacturing a cage-shaped steel cord used as a rubber reinforcing material for pneumatic tires for axles, conveyor belts, etc.

Conventionally, a steel cord 1 is formed by twisting a plurality of strands 2 together, as shown in Fig. 1A, but the strands are in close contact with each other, and when covered with a rubber material, the center of the cord It is difficult for rubber to penetrate into the
There was a drawback that the adhesion between the steel cord 1 and the rubber material was poor, and once moisture, salt, etc. entered, rust would easily occur and the waves would propagate throughout the cord.
For this reason, in recent years, a cage-shaped steel cord has been devised in which a distance c is provided between the strands 2 of the steel cord 1, as shown in FIG. However, no practical device has been developed yet for the production, and one possible method is to use cone pins to create excessive curls on a cylindrical wire stranding machine, which has slightly low productivity. Strong skewing causes severe pin wear, which makes maintenance complicated and reduces productivity. It is also difficult to make adjustments for uniform skewing, making it difficult to maintain stable quality. do not have.

The present invention was devised to eliminate the above-mentioned drawbacks, and is an apparatus for manufacturing cage-shaped steel cords with high productivity and stable quality by continuously performing normal stranding processing and cage-shaped processing of steel cords. It provides:

An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 2, 2 is a strand of wire constituting the cord and is supplied from a supply reel (not shown).
Reference numeral 3 denotes a twisting roller for gathering the strands 2, which is rotatably attached to the machine frame and preferably has a spiral groove, and the strands 2 are wound several times. Reference numeral 4 denotes a false twisting roller for pre-twisting the strands 2, which is attached to a bracket 5 driven by a timing pulley 6 so as to rotate freely. 7 is a fryer rotatably driven by a timing pulley 8 through a bearing in the machine frame 9;
10 are steel cord guide rollers rotatably disposed on the fryer 7, and 11 is a cradle suspended from the fryer 7 via bearings so as to be stationary or swingable. 12,12
13 is a turn roller that changes the traveling direction of the steel cord rotatably mounted on the cradle 11, and an over-twist roller 13 that overtwists the twice-twisted steel cord. The bracket 14 is mounted on the cradle 11 via a bearing and is positively driven by a gear 15. A batten 16 is rotatably arranged on the cradle 11 and is arranged after the over-twisting roller 13. As shown in FIG. 3, the batten 16 has a plurality of small holes (preferably equal to the number of wires) each formed in a disc made of cemented carbide or a hard material in a shape that allows the wires to be bent when they pass through. They are formed at equal intervals on the circumference connecting the centers of the holes, and are rotatably attached to the mounting frame 18 via bearings 17. Further, the batten 16 may be provided with a device that actively assists the rotation or applies a brake, depending on the case. The battens 16 can also be formed by drilling small holes in a metal plate and subjecting the holes to surface hardening treatment. Reference numeral 19 denotes a straightener, which is composed of a plurality of rotatable small-diameter rollers 20 with grooves facing each other in a staggered manner. , installed adjustable from side to side. 2
1 is a pair of grooved capstan rollers that are driven to wind up by a gear. Reference numeral 22 denotes a winding reel attached to a winding device, which winds up a steel cord finished in a basket shape. The arrangement as described above constitutes a cage-shaped steel cord manufacturing apparatus.

Next, the twisting action of the cage-shaped steel cord by the above device will be explained.

The strands 2 are fed out from several supply reels according to the twisting configuration, are aligned by a twisting roller 3, are false-twisted to a predetermined twisting pitch by a false-twisting roller 4, and passed through a hollow shaft of a fryer 7. The fryer 7 is guided by guide rollers 10 and passes through the hollow shaft of the opposing fryer 7.
Guided within. The strands guided into the fryer 7 are twisted twice as much as the rotation of the fryer to form a steel cord. Further, the twice-twisted steel cord is passed through an over-twisting roller 13 in order to stabilize the repulsion of the twist.

Next, after passing through the over-twisting roller 13 to form a stable twist as a steel cord, the strands are untwisted again and passed through the batten 16, depending on the shape of the small hole provided in the batten 16 and the cord tension. , a basket-like twist is added on top of the twist already attached to the wire. At this time, board 1
6 is rotatable by a bearing 17, and rotates naturally at the speed shown below, and the wires exiting the perforated plate 16 are twisted together again.

m-υ/e×10 ³ m: Rotational speed of the batten r・p・m υ: Linear speed m/min e: Tighter mm At this time, the rotational torque on the batten is a fraction of the cord tension in the torsional direction. Since it is applied by a component of force, smooth rotation cannot be obtained, and the influence of the friction moment of the bearing 17 is large.
If it affects kink and cage degree, batten 1
6 may be actively rotated by a torque motor, or a brake device or the like may be provided.

Next, the cord coming out of the batten 16 is formed into a cage-shaped steel cord, but since it is difficult to adjust the degree of cage-likeness to a target degree, the cord is usually processed into a large size. At this time, since the kink is biased toward the negative side, the cage-like degree is adjusted, and the kink is passed through the corrector 19 in order to adjust the kink to the positive side. Incidentally, the cage-like degree and the kink are adjusted by adjusting the position of the small-diameter grooved roller 20 on the mounting plate. In this way,
A continuously stranded cage-shaped steel cord is wound up by a grooved capstan roller 21 and wound onto a reel 22.

FIG. 4 shows the movement of quality as the chord progresses.

According to the above embodiment, it is possible to manufacture a kink-free and stable cage-shaped steel cord with improved productivity, but there are other embodiments that can obtain the same effect as the above embodiment. is shown below.

The one shown in FIG. 5A is the same as the embodiment shown in FIG. 2 without the false twisting roller, but it can be made with the same quality by adjusting the rotation speed of the overtwisting roller 13 placed in the cradle. is obtained.

The one shown in FIG. 5B is the same as the embodiment shown in FIG. 2 except that the over-twisting roller 13 is removed.
By adjusting the rotation speed of the false twisting roller 4, the same quality can be obtained.

In the embodiment shown in FIG. 5C, the battens 16 are arranged after the cord enters the cradle and before the over-twisting rollers 13 to adjust the degree of cage-like shape. Since the steel cord is then overtwisted, a more stable steel cord with a cage-like degree can be obtained.

The one shown in FIG. 6 has an auxiliary flyer 23 placed outside the fryer 7 in FIG. Since the twist is eliminated, the cord is twisted once and twice again, and then passed through the batten, the twisting pitch is stable and a steel cord with no uneven twisting can be obtained.

Figures 7A and 7B show an embodiment of a double-twisting machine that winds the wire outside the cradle. It is placed in front of the grooved capstan roller 21.

Since the basket-shaped steel cord manufacturing apparatus of the present invention has the above-mentioned configuration, after the predetermined twice-twisted steel cord is formed, the battens are processed into a basket shape without being wound up, and the accompanying properties (basket-shaped) are formed. degree, kink,
By passing the cord through a straightening device that adjusts the straightness (extensibility), it has become possible to continuously manufacture stable cage-shaped steel cords of good quality. Furthermore, since adjustment is performed using a corrector, it is extremely easy, and productivity is greatly improved, making this an idea of great practical value.

[Brief explanation of the drawing]

FIG. 1A is a sectional view showing a normal steel cord, FIG. 1B is a sectional view showing a cage-shaped steel cord, and FIG. , Fig. 3 is a sectional view of the batten part used in the device of the present invention, Fig. 4 is an explanatory diagram showing the function of the batten and corrector in the quality of steel cord, and Figs. FIG. 2 is a schematic configuration diagram showing another embodiment of the cage-shaped steel cord manufacturing apparatus. 1... Steel cord, 2... Element wire, 3... Twisting roller, 4... False twisting roller, 5, 14
... Bracket, 6, 8 ... Timing pulley, 7 ... Flyer, 10 ... Guide roller, 11 ... Cradle, 12 ... Turn roller, 13 ... Over-twist roller, 16 ... Grain plate, 17
... Bearing, 18 ... Mounting frame, 19 ... Straightener, 20 ... Small diameter roller, 21 ... Capstan roller, 22 ... Reel.

Claims (1)

[Scope of utility model registration request] Double-twisting machine with multiple supply reels outside the fryer and a take-up reel inside the fryer, or double-twisting machine with multiple supply reels inside the fryer and a take-up reel outside the fryer A straightening device in which, after being twisted twice in a wire machine, a batten having at least as many small holes as the number of strands is rotatably arranged, and a plurality of small diameter rollers are arranged in a staggered manner continuously on the batten. A manufacturing device for cage-shaped steel cord.