JP3117293B2 - Flyer for stranded wire machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flyer used for an unwinding device of a twisting machine in the production of a metal wire such as steel cord, and more particularly to a buncher for wrapping a metal wire with a metal wire. The present invention relates to the shape of a high-speed rotating flyer used in a twisted-wire machine device.

[0002]

2. Description of the Related Art As shown in FIG. 1, a generally used buncher-type twisting machine for wrapping a cord or the like with a metal wire or the like is a cord unwinding device 1 having a main structure. ,
It comprises a wrapping wire unwinding device 2 and a winding device 3.

The wrapping wire unwinding device 2 comprises a driving device 4, an unwinding shaft 5, a wrapping wire reel 6, and an arm-shaped fryer 7. The driving device 4 rotates the unwinding shaft 5, and And an arm-shaped fryer 7 rotatably provided in the circumferential direction with respect to the unwinding shaft 5 and the unwinding shaft 5. The rotation of the shaft 5 causes the wrapping wire 8 to rotate in the direction of winding around the cord, and the wrapping wire 8 unwound from the wrapping wire reel 6 passes over the flange of the wrapping wire reel 6, and the metal wire to be wrapped. It is guided and guided to the body 9 and wound up on the metal wire body 9.

[0004] Such a flyer 7 is generally used in FIGS.
As shown in the figure, a metal rod having a length equal to or greater than the radius of the wrapping wire reel 6 is curved so as to look at the reel winding drum from the outer end face of the flange of the reel 6, and is provided with a flyer. At the end of -7, a guide tip such as a die for guiding the wrapping wire 8 is used. By providing the above-mentioned flyer 7 on both sides of the arm rotating shaft, it is possible to balance the flyer during rotation.

In general, as the unwinding flyer of a buncher-type twisted wire machine, a disk-shaped one is used in addition to the rod-shaped and arm-shaped one described above.
The flyer which rotates at a high speed like the unwinding flyer described above is not preferable because the inertial mass of the disk increases and the additional stress for rotating the disk increases.

The winding speed S (m) of the winding device 3 is determined by using the above-described buncher-type twisting device at a rotation speed V (rotation / min) in the wrapping winding direction of the wrapping wire reel 6. / Min), the lapping pitch (mm) = 1000 × S / V,
Can be wrapped at the pitch indicated by.

On the other hand, steel codes used for pneumatic tires and the like are processed as described below. That is, in the rolling step of forming a composite with rubber, the steel cord is aligned in parallel and covered with a sheet-like rubber to obtain a composite with rubber (hereinafter, referred to as trie) 10. You. FIG.
Is the plane surface. Next, the trim 10 is cut at regular intervals or at right angles or obliquely to the longitudinal direction of the cord at a predetermined interval as shown by a dotted line in FIG. After being obtained, the trim member 1
1 are joined to each other to form a belt-like
The material 12 is used in a carcass portion or a belt portion of a tire.

[0008] The trim material 12 is produced as described above. Usually, when the individual steel cords have a large torsion, the end of the triat member 11 at the time of cutting is usually used. When the restraint of the cord at the portion is released, the resultant force is deviated in one of the circumferential directions of the code cross section, so that the triat member 11 cut in the above cutting step is moved in the direction of the resultant force. As a result, the end 13 of the triat member 11 jumps up 13 as shown in FIG.

[0009] There is a problem that the trim member 11 having the shape of (13) whose end is raised cannot be joined in the next joining step. However, there is a problem that it takes time and labor to perform the correction by hand, and there is a problem that the code driving at the joint is disturbed, resulting in poor appearance and reduced tire belt durability.

As described above, the torsion of the metal wire 9 such as steel cord has an effect on workability, productivity and quality of the tire and the like when manufacturing the tire and the like using the same. In order to have a large effect, there has been a demand for a metal filament such as steel cord having a stable torsion value in the longitudinal direction.

The torsion of the metal filament is formed by the combination of the elastic deformation stress of the individual metal filaments constituting the filament and the interaction caused by the contact between the strands.
A phenomenon in which the torsion of a wrapped steel code or the like changes in the step of wrapping a metal wire, even if the torsion of the wrapped code is constant. And the steel cord torsion at the end, the middle part between them
However, since there is a phenomenon that the direction changes in the opposite direction to the lapping direction as compared with the lapping direction, there is a problem in that the stripes jump up in the rolling process.

Further, in order to prevent jumping in the rolling process, it is necessary to remove the code at the start and end of the lapping process in the steel code manufacturing process. There is a problem from the viewpoint of a decrease in the number of products, a decrease in the stoppage of products, and the protection of resources.

There has been no method in the past for solving the problem that the edge of the trick member jumps up due to the treatment in the lapping process.

[0014]

In view of the above problems,
The problem to be solved by the present invention is that, in the step of wrapping a metal wire such as steel cord with a metal wire or the like, the torsion of the wrapped metal wire produced by the lapping treatment is applied to the metal wire. An object of the present invention is to provide a flyer for a twisting machine used in a wrapping material unwinding device, which wraps without changing the length of a strip.

[0015]

SUMMARY OF THE INVENTION The present invention adopts the following constitution for the above purpose. That is, the present invention
The unwrapped wrapping metal wire is guided over the flange of the wrapping wire reel and guided to the metal wire to be wrapped.It is installed so as to be rotatable around the unwinding axis of the wrapping wire reel. A fryer for a twisted wire machine, wherein the fryer includes a plate-shaped arm that extends in a direction perpendicular to the axis and includes a portion having both ends in the circumferential direction. The present invention relates to a fryer for a twisting machine, characterized in that the front end and / or the rear end in the rotation direction of the arm having a cross-sectional shape of the arm including and crossing the arm are acute or streamlined.

[0016]

The reason why the shape of the leading end and / or the trailing end of the unwinding cross section is made acute or streamlined is to reduce the air resistance of the arm when the unwinding flyer rotates. Here, the air resistance generated by the flyer directly becomes the tension at the time of wrapping the wrapping metal wire, and as a result, is a factor in determining the torsion of the code. Is changed,
The torsion of the word will also change.

To explain this in more detail, the wrapping process of the metal wire onto the cord is performed by setting the metal wire to be wrapped and the metal wire to be wrapped on the respective unwinding shafts, and then winding the wrapped metal wire. It is performed by rotation of the take-out reel and rotation of winding of the metal filament. However, the above-described reel and take-up rotations are stationary at the start of the processing, and after reaching a predetermined rotation speed after a predetermined time, the lapping processing is performed in a steady state, and a predetermined time is set at the end of the processing. Then, the process is decelerated from the rotation speed in the steady state to the stationary state, and the process ends. As described above, since the rotation speed at the start and end of the process is different from the rotation speed in the steady state, if the air resistance applied to the arm of the flyer is large, the external force required to rotate the arm at the start of the process or This greatly changes between the end and the steady state.

The reason that the external force required to rotate the arm affects the tension of pulling out the wrapping metal wire is that the arm is rotatable in the circumferential direction around the unwinding axis of the wrapping wire reel. This is because pulling out the wrapping wire requires a corresponding external force that resists air resistance during arm rotation, which causes tension during wrapping of the metal wire. The air resistance generated by the arm changes between the start and end of the processing and the steady state, so that a difference in lapping tension occurs. Further, when the tension of the wrapped metal wire during wrapping changes, the torsion of the wrapped metal wire changes. This is because the appearance of the potential torsion of the metal striated body changes because the force for tightening the metal striated body changes.

As described above, by reducing the air resistance of the arm during rotation of the unwind flyer, the change in tension during wrapping of the wrapping metal wire is reduced, and the change in code torsion is reduced. As a method of reducing the air resistance at the time of arm rotation, the cross-sectional shape is specified by an acute angle or streamline, but other shapes for the purpose of reducing the air resistance are also provided. It may be.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described based on embodiments. The arm shape of the unwind flyer 17 according to the present invention is shown in FIGS. 9 is a front view, FIG. 10 is a side view, and FIG. 11 is a cross-sectional view taken along line aa of FIG. still,
The cross-sectional shape as shown in FIGS.
The arm of the present invention may have a predetermined strength,
In order to reduce inertia and fatigue resistance at the same time, it is preferable to use a lightweight and highly rigid material. In this embodiment, an aluminum alloy material is used.

FIGS. 2 to 4 show the shape of a conventional flyer 7. 2 is a front view, FIG. 3 is a side view, and FIG.
It is sectional drawing in the -a line.

The wrapping material unwinding fryers 17 and 7 of the invention and the prior art described above were installed in the buncher twisting machine shown in FIG. 1 to perform lapping. The metal wire 9 to be wrapped here has a wire diameter of 0.19.
After twisting three steel wires of 3 mm to form a core, nine wires are wound around the core to form a two-layer twist of 3 + 9 structure, which is then installed in the wire unwinding apparatus 1. The wrapping wire 8 is wrapped. This wrapping metal wire 8
After using a steel wire having an element wire diameter of 0.15 mm and installing it in the wrapping wire unwinding device 2, the wrapping wire reel 6
The lapping process was performed at a rotation speed of 10.500 (rotation / min) and a winding speed of 38.85 (m / min).
A metal filament wrapped at a pitch of 3.7 mm by the lapping process described above is obtained.

Here, the torsion value of the wrapped metal filament 9 is determined by pulling out the metal filament wound on a reel by 2 m while restraining the end of the metal filament, and releasing the constraint of the end. The rotation was measured at the end of the striatum. Also, the tension during wrapping of the wrapping material is
Install only the wrapping wire without installing the metal wire,
The wrapping wire pulled out of the reel passed through the arm guide chip, and immediately after passing through a focusing guide installed beforehand immediately after the unwinding fryer, the wrapping wire was directly measured using a tension measuring instrument. The tension at the time of lapping at the time of steady state and at the time of termination was measured by the method described above.

A lapping process is performed using the above-described metal wire and the wrapping wire, and the wrapping tension of the wrapping wire and the torsion of the metal wire at the time of steady state and at the end are measured, and a comparison is made between the invention example and the embodiment. . Also, in the rolling process of forming a composite with rubber, a treat is created using a metal filament corresponding to the beginning or end of wrapping, and the treat ends are cut off after cutting the treat to a predetermined length. Was measured and compared between the invention example and the example.
Table 1 shows the results.

[0025]

[Table 1]

As can be seen from the results shown in Table 1, the metal wire wrapped using the arm according to the present invention has a higher wrapping material tension at the time of lapping at the end and at the steady state than the conventional wire using the arm. Has been proven to decrease by less than half, and consequently the change in chord torsion has also been reduced by less than half.

[0027]

As described above, by using the wrapping material unwinding flyer having the arm of the present invention, the change in wrapping tension at the start and end of the lapping process can be reduced, and the wrapped metal can be reduced. The torsion change of the striatum can be reduced.

For this reason, it is possible to suppress the jumping of the trim cut in the rolling step of forming a composite with rubber,
The quality of the rubber composite can be improved, and at the same time, the productivity is improved without removing and using the metal wire portion having a large change in torsion at the start and end of the lapping process as in the related art. In some cases, the energy required for manufacturing can be reduced by reducing the air resistance, which also has the effect of saving energy.

[Brief description of the drawings]

FIG. 1 is a schematic view of a buncher-type twisting machine.

FIG. 2 is a front view showing the shape of a conventional flyer.

FIG. 3 is a side view of the flyer of FIG. 2;

FIG. 4 is a sectional view of the flyer of FIG. 2;

FIG. 5 is a plan view of a composite (trit) with rubber.

FIG. 6 is a plan view of a trick member.

FIG. 7 is a plan view of a trick material.

FIG. 8 is a perspective view showing an uprising of the end of the trick member.

FIG. 9 is a front view of the flyer of the present invention.

FIG. 10 is a side view of the flyer shown in FIG. 9;

FIG. 11 is a sectional view taken along the line aa in FIG. 10;

FIG. 12 is a sectional view showing another example of the flyer of the present invention.

FIG. 13 is a sectional view showing still another example of the flyer of the present invention.

[Description of Signs] 1 ‥‥ wire unwinding device, 2 ‥‥ wrapping wire unwinding device, 3 ‥‥ winding device, 4 ‥‥ drive device, 5 ‥‥ unwinding shaft, 6 ‥‥ wrapping wire reel, 7 {Conventional fryer, 8} Wrapping wire, 9} Metal wire, 10} Composite with rubber coated with rubber, 11} Treated member, 12} Treated material, 13} Treated The end of the member jumps up, 17 ° Fryer of the present invention.

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Iso Tsugio, 800 Shimononakano, Kuroiso City, Tochigi Prefecture Bridgestone Bekaert Steel Co., Ltd.Tochigi Factory (72) Inventor Tatsuya Sakurai 800 Shimonakano, Kuroiso City, Tochigi Bridgestone Bekaertsu Inside the Tochigi Plant of Rucod Co., Ltd. (72) Yasuyuki Tsuruno 800 in Shimonakano, Kuroiso City, Tochigi Prefecture Bridgestone Bekaert Steel Co., Ltd. Tochigi Factory (56) References JP-A-53-28743 (JP, A) JP-A-1-207486 (JP, A) JP-A-48-41165 (JP, A) JP-A-61-140476 (JP, A) JP-A-4-60331 (JP, U) JP-A-61-155400 (JP, A) JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) D07B 1/00-9/00 B65H 57/00-57/28

Claims (1)

(57) [Claims] An unwrapped wrapping metal wire is guided over a flange of a wrapping wire reel and guided to a metal wire to be wrapped, and is rotated in a circumferential direction around an unwinding axis of the wrapping wire reel. A fryer for a twisting machine installed in a free state, wherein the fryer includes a plate-like arm including a portion extending in a direction perpendicular to the axis and having both ends in the circumferential direction. A flyer for a twisting machine, characterized in that the cross-sectional shape of the arm crossing the arm including the rotation direction of the arm has a sharp or streamlined front and / or rear end in the rotation direction of the arm.