JP4932582B2 - Method and apparatus for manufacturing rubber-coated cord member - Google Patents

Description

  The present invention relates to a method and apparatus for manufacturing a rubber-coated cord member constituting a tire constituent member.

Tire constituent members such as belts and plies are configured by cutting and joining rubber-coated cord members obtained by coating rubber with a plurality of cords arranged in parallel at a predetermined pitch.
In order to manufacture the rubber-coated cord member, there is a calendar method in which a plurality of arranged cords are manufactured so that a pair of rubber sheets are sandwiched between them.

  Therefore, an insulation method is adopted in which a plurality of cords arranged by an extruder are directly covered with rubber (see, for example, Patent Document 1).

JP 2002-113793 A

  In Patent Document 1, by passing a plurality of cords through an inserter provided in an insulation head of an extruder, a plurality of cords guided in a required relative posture are fed from a cylinder of the extruder. In addition, it is disclosed that unvulcanized rubber is coated in a required shape with a die, and uncured rubber is directly coated on a plurality of cords arranged by an inserter, so that the arrangement of the cords is not disturbed and biased. Is unlikely to occur.

However, an apparatus for supplying a plurality of cords to the insulation head is not disclosed in Patent Document 1.
Usually, a plurality of cords are supplied to the insulation head all at once from a cord supply device such as a creel carriage or a creel stand that supports a plurality of reels around which one cord is wound.

  Since the length of the cord supplied from one cord supply device is limited, when all the cords of the cord supply device have been supplied during the production of the rubber-coated cord member, the cord supply device becomes a new code supply device. Although it is necessary to switch, the operation at this time is not disclosed in Patent Document 1.

  Although not disclosed in Patent Document 1, a plurality of cords are unwound from a new cord supply device, inserted into the insulation head, and the extruder is pulled out while pulling out the plurality of cords protruding from the insulation head. Operate to coat multiple cords with rubber to form the tip part of rubber-coated cord member, cut this tip part and join it to the rear end of the previously formed rubber-coated cord member. The rubber-coated cord member is continuously formed.

  Here, until the rubber-coated cord member is continuously formed, it is almost manually performed by a worker. In particular, the process of covering the rubber while pulling a plurality of cords protruding from the insulation head is extremely difficult. In addition, it is not easy to pull a plurality of cords evenly without bias, and the work is difficult and requires a lot of work time.

  The present invention has been made in view of the above points, and the object of the process is to easily pull a plurality of cords at the time of switching the cord supply device, simplify the work and reduce the work effort. It is in the point which provides the manufacturing method and manufacturing apparatus of a rubber covering cord member which can aim at shortening of work time.

  In order to achieve the above object, according to the first aspect of the present invention, the plurality of cords drawn from the cord supply device are passed through the insulation head of the extruder, and the plurality of cords protruding from the insulation head are pulled out. The tip part is locked to the split groove of the roller with split groove, and while the extruder is running, the roller with split groove is rotated to coat the plurality of cords with rubber, and the tip part of the rubber cover part is cut. The front end of the cut rubber-coated cord member is joined to the cut rear end of the previously formed rubber-coated cord member, and the extruder is operated according to the pull-out of the previously formed rubber-coated cord member to form a plurality of cords. The rubber-coated cord member was produced by continuously coating rubber to produce one rubber-coated cord member.

  According to a second aspect of the present invention, in the method for producing a rubber-coated cord member according to the first aspect, when a plurality of cords drawn from the cord supply device have been pulled out, the rear end portion of the rubber-coated portion of the cord is cut. The empty code supply device is switched to a new code supply device.

  According to a third aspect of the present invention, there are provided a cord supply device from which a plurality of cords are drawn out, an extruder for covering the plurality of cords drawn from the cord supply device with rubber, and a rubber in which the cord is covered with rubber In a rubber-coated cord member manufacturing apparatus comprising a cutting means for cutting an end portion of a coated cord member and a joining means for joining the end portions of the cut rubber-coated cord member to each other, the rubber-coated cord member is drawn from the insulation head of the extruder. A rubber-coated cord member manufacturing apparatus comprising: a split grooved roller that locks and winds a plurality of cords in a split groove; and a driving unit that rotationally drives the split grooved roller.

  According to the method for manufacturing a rubber-coated cord member according to claim 1, a plurality of cords drawn out from a new cord feeding device and projecting from the insulation head at the time of switching the cord feeding device are pulled out, and the leading end portion is provided with a groove. The roller with the groove is locked with the split groove of the roller, and the roller with the groove is rotated while the extruder is running to coat the plurality of cords with rubber. By rotating, it is possible to easily pull a plurality of cords evenly without any bias, and labor can be reduced, and the work can be simplified and the work time can be shortened.

  According to the method for manufacturing a rubber-coated cord member according to claim 2, when the plurality of cords drawn from the plurality of creels of the cord supply device have been pulled out, the rear end portion of the rubber-coated portion of the cord is cut, In preparation for joining with the tip of the rubber-coated cord member, a new rubber-coated cord member is formed by switching an empty cord supply device to a new cord supply device, and the tip portion is cut to remove the previous rubber-coated cord. It joins to the rear end which the member cut | disconnected, and the rubber covering cord member of this time can be efficiently continued to the last rubber covering cord member.

According to the apparatus for manufacturing a rubber-coated cord member according to claim 3, a roller with a split groove that locks and winds a plurality of cords drawn from the insulation head of the extruder into the split groove, and with the split groove Because it has a drive means for rotating the roller, it is easy to pull multiple cords evenly by simply rotating the split grooved roller, simplifying the work and shortening the work time. Can be achieved.
Workers' labor can be reduced by providing a speed reduction mechanism in the driving means for rotationally driving the grooved roller or driving the electric motor.

Hereinafter, an embodiment according to the present invention will be described with reference to FIGS.
A schematic plan view of only a main part of the rubber-coated cord member manufacturing apparatus 10 of the present embodiment is shown in FIG. 1, and a schematic side view thereof is shown in FIG.

In the extruder 11, a screw 14 is rotatably supported inside a cylinder 13 extending from below a hopper 12 into which a rubber material is charged, and an insulation head 15 is provided at the tip of the cylinder 13.
When the screw 14 is rotationally driven by a motor, the rubber material put into the hopper 12 is transferred to the insulation head 15 at the tip of the cylinder 13 while being heated and kneaded.

  The insulation head 15 is formed by extruding a rubber material transferred by a screw 14 into a belt shape, and a plurality of cords 1 arranged behind the die are arranged in a predetermined relative positional relationship and supplied to the die 16. Inserter 17 is provided.

A creel carriage 21 for supplying the cord 1 to the insulation head 15 is stopped at a predetermined position behind the inserter.
The creel carriage 21 with wheels 22 is movable, and a plurality of bobbin reels 24 are supported on the base 23 in the left / right front / rear and up / down directions, and a steel cord 1 is wound around each bobbin / reel 24 respectively. Yes.

A cord alignment guide 25 is arranged in front of the creel carriage 21 and behind the inserter 17 of the insulation head 15.
The cord alignment guide 25 is a plate-like member, and a plurality of small holes through which the steel cord 1 is passed are formed at predetermined positions, and the steel cord 1 unwound from each bobbin / reel 24 of the creel carriage 21 is assigned to each small cord. By passing through the hole, the plurality of steel cords 1 can be roughly aligned together at positions facing the rear of the inserter of the insulation head 15.

  The plurality of steel cords 1 roughly aligned by the cord alignment guide 25 are passed through the inserter 17 of the insulation head 15 so that they are arranged in a line at a required pitch and protrude forward from the die opening. The rubber-coated cord member 2 is formed by being coated with unvulcanized rubber while being pulled and formed into a band shape by a die.

In front of the die of the insulation head 15, a pass roller 26 is disposed that receives and conveys the rubber-coated cord member 2, and a work table 27 is further provided downstream in front of the pass roller 26.
Although not shown, a winding device or the like that winds the rubber-coated cord member 2 by driving a motor is installed on the downstream side of the work table 27.

  The rubber-coated cord member 2 formed in a strip shape and pushed out by the insulation head 15 while being pulled by the winding device passes over the work table 27, and the work table 27 is used for cutting and joining the rubber-coated code member 2 and the like. Work is done.

In the rubber-coated cord member manufacturing apparatus 10, a split grooved roller 30 is provided below the work table 27 so as to be rotatable about its axis.
As shown in FIG. 3, the roller 30 with a split groove has a cylindrical shape, and has a cross-shaped groove opening on the tip surface, and four split grooves 31 are formed by cutting to a predetermined depth in the axial direction.

The split grooved roller 30 protrudes from the reduction gear mechanism 35 as an output shaft of the reduction gear mechanism 35, and the input shaft of the reduction gear mechanism 35 is a handle shaft of the manual handle 36 (see FIG. 1).
Therefore, when the operator turns the manual handle 36, the split grooved roller 30 rotates at a reduced speed via the reduction gear mechanism 35. Therefore, the operator can rotate the split grooved roller 30 with a large force with a small force. it can.

With the tip portions of a plurality of steel cords 1 arranged in a row, the required portions are bent at a right angle all at once, and the bent portions are two of the cross-shaped grooves on the tip surface of the split grooved roller 30 that are orthogonal to each other. All the steel cords 1 can be inserted into the groove 31 and hooked so as to be hooked so as to be sequentially inserted into the groove openings of the groove 31 (see FIG. 4).
In addition, like the roller 60 with a split groove shown in FIG. 11, the opening edge of the groove opening of the split groove 61 may be cut out to form a tapered surface 61a to expand the groove opening in a tapered shape. By forming the tapered surface 61a, a plurality of cords can be inserted into the dividing groove 61 at a time.

When the split grooved roller 30 is rotated in a state where the leading ends of the plurality of steel cords 1 are engaged with the split grooves 31, the plural steel cords 1 are wound around the outer peripheral surface of the split grooved rollers 30 and pulled all at once. be able to.
The plurality of steel cords 1 are pulled evenly without unevenness.

  An operation procedure at the time of switching the creel carriage 21 in the rubber-coated cord member manufacturing apparatus 10 provided with such a roller 30 with a split groove will be described with reference to schematic side views over time shown in FIGS.

First, (1) in FIG. 5 shows that the rear end portion of the rubber-coated cord member 2 formed by being pushed out from the insulation head 15 by the insulation method after the supply of the steel cord 1 from the creel carriage 21 is the work table. 27 shows the state.
Next, on the work table 27, the rear end portion of the rubber-coated cord member 2 is cut with a cutting tool 28 such as a hand shear, a cutting scissors, a cutter (see (2) in FIG. 5), and the rear end portion cut. Is removed (see (3) of FIG. 5).

  During this time, the empty creel cart 21 that has finished supplying the steel cord 1 is moved, and the steel cord 1 is switched to a new creel cart 21 wound around the bobbin reel 24 (see (3) in FIG. 5).

  Then, as shown in FIG. 5 (4), the steel cord 1 is pulled out from each bobbin / reel 24 of the new creel carriage 21 and roughly aligned through the cord alignment guide 25, and then the insulation head 15 A plurality of steel cords 1 are arranged in a row through the inserter 17 and pulled out from the die 16, further partially wound around the pass roller 26 and pulled out in a diagonally downward direction. The steel cord 1 is bent at a right angle, and the bent portion of the steel cord 1 is inserted into the slots perpendicular to each other among the cross-shaped slots on the tip face of the roller 30 with a slotted groove. (See FIG. 4).

  The above steel cord 1 is manually set by the operator, but the steel cord 1 is simply pulled out and set from the creel carriage 21, so that it does not require much labor. In particular, the steel cord 1 from the insulation head 15 is used. The drawer is not covered with rubber and does not need to be pulled with a strong force.

  After the end portions of the plurality of steel cords 1 are locked in the dividing groove 31 of the dividing groove roller 30, the extruder 11 is operated and the manual handle 36 is rotated and the dividing groove is provided via the reduction gear mechanism 35. By rotating and driving the roller 30, a plurality of steel cords 1 can be wound at a time, and the plurality of steel cords 1 can be easily pulled out with uniform force.

  Then, as shown in FIG. 6 (5), rubber is formed into a belt shape and pushed out by the insulation head 15 while the steel cord 1 is covered by the pulling of the plurality of steel cords 1 by the winding of the roller 30 with split grooves. It will be.

  The force required for pulling out the steel cord 1 at this time is large because rubber is covered, but the rotation operation of the manual handle 36 by the operator can be weak by the reduction gear mechanism 35, and the labor is greatly reduced. Yes.

  Thus, the rubber-coated cord member 2 formed this time is formed to a predetermined length, and when the tip of the rubber-coated cord member 2 approaches the split grooved roller 30, as shown in FIG. The front end portion of the covering cord member 2 is cut with a cutting tool 29 such as a hand shear, a cutting blade, a cutter, or the like.

Then, the cut end of the rubber-coated cord member 2 formed this time is joined on the work table 27 to the rear end of the rubber-coated cord member 2 formed previously, which has been waiting on the work table 27. (See (6) in FIG. 6), the rubber-coated cord member 2 formed this time can be efficiently continued to the rubber-coated cord member 2 formed last time.
This joining is performed by superimposing the tip of the rubber-coated cord member 2 formed this time on the rear end of the rubber-coated cord member 2 formed last time and crimping it with a joining means such as a stitcher.

  Thus, when the rubber-coated cord member 2 that is being formed this time is joined to the rubber-coated cord member 2 that was previously formed, the current formation is performed as the rubber-coated cord member 2 that was previously formed is wound by the winding device driven by the motor. The rubber-coated cord member 2 in the middle is pulled out by driving the winding device, and simultaneously, a plurality of steel cords 1 are covered with rubber to form the rubber-coated cord member 2 (see (7) in FIG. 6).

  The state where the supply of the steel cord 1 from the creel carriage 21 this time and the formation of the rubber-coated cord member 2 this time is finished is the state shown in (8) of FIG. 6, and (1) of FIG. By repeating the above steps, one long rubber-coated cord member 2 is manufactured in a state of being wound around the winding device.

  As described above, when the creel carriage 21 is switched, the plurality of steel cords 1 drawn from the new creel carriage 21 are locked to the dividing groove 31 of the dividing groove roller 30 so that the plurality of cords can be obtained. It can be easily pulled evenly, and labor can be reduced, and the manufacturing work of the rubber-coated cord member 2 can be simplified to shorten the work time.

  Steel cord 1 was used for rubber-coated cord member 2, but not only steel cord but also a cord such as a textile cord may be used. Regardless, rubber can be coated.

  The rubber-coated cord member manufacturing apparatus 10 uses a rotation operation of the operator's manual handle 36 to rotationally drive the roller 30 with a groove, but rotates the roller 30 with a groove by a driving source such as a motor. This may reduce the burden on the operator.

Next, a modified example of the split grooved roller will be described with reference to FIGS.
The roller 40 with a split groove shown in FIG. 7 has a cylindrical shape and has a groove opening in the radial direction from the center on the front end surface. It is cut and formed.
Of these, it can be locked so that the tip of multiple cords can be inserted and hooked into the two split grooves 41. it can.

Further, another modified example of the roller with a split groove is shown in FIGS.
It has a cylindrical shape and has a groove opening in the diameter direction on the tip surface, and one split groove 51 is formed by cutting to a predetermined depth in the axial direction.
The end portions of the plurality of cords can be inserted and hooked into the split groove 51, and the plurality of cords can be easily wound and pulled out with equal force without being biased.

It is a schematic plan view of only the principal part of the rubber covering cord member manufacturing device concerning one embodiment of the present invention. It is the same schematic side view. It is a perspective view of a roller with a split groove. It is a side view which shows the state which locked the steel cord to the roller with the same groove. It is the schematic side view which illustrated the operation procedure at the time of the change of a creel cart over time. FIG. 6 is a schematic side view continued from FIG. 5. It is a perspective view which shows the modification of a roller with a split groove. It is a side view which shows the state which locked the steel cord to the roller with the same groove. It is a perspective view which shows another modification of a roller with a split groove. It is a side view which shows the state which locked the steel cord to the roller with the same groove. It is a perspective view which shows the modification of a roller with a split groove.

Explanation of symbols

1 ... steel cord, 2 ... rubber coated cord member,
DESCRIPTION OF SYMBOLS 10 ... Rubber-coated cord member manufacturing apparatus, 11 ... Extruder, 12 ... Hopper, 13 ... Cylinder, 14 ... Screw, 15 ... Insulation head, 16 ... Die, 17 ... Inserter, 21 ... Creel carriage, 22 ... Wheel, 23 ... Stand, 24 ... Bobbin reel, 25 ... Cord alignment guide, 26 ... Pass roller, 27 ... Workbench, 28,29 ... Cutting tool,
30 ... Roller with split groove, 31 ... Split groove, 35 ... Reduction gear mechanism, 36 ... Manual handle.
40 ... Rolled roller, 41 ... Split groove,
50 ... Rolled roller, 51 ... Split groove,
60: Roller with split groove, 61 ... Split groove.

Claims (3)

Pass a plurality of cords drawn from the cord feeder through the insulation head of the extruder,
Pull out the multiple cords protruding from the insulation head and lock the tip part into the split groove of the roller with split groove,
While operating the extruder, rotate the split grooved roller to coat a plurality of cords with rubber,
Cut the tip of the rubber cover,
Join the tip of the cut rubber-coated cord member to the rear end of the previously cut rubber-coated cord member,
A rubber-coated cord member manufactured by operating the extruder according to a previous drawing of a rubber-coated cord member, and continuously coating a plurality of cords with rubber to produce a single rubber-coated cord member. Manufacturing method. When the plurality of cords drawn out from the cord supply device has been pulled out, the rear end portion of the rubber covering portion of the cord is cut,
2. The method for producing a rubber-coated cord member according to claim 1, wherein an empty cord supply device is switched to a new cord supply device. A cord supply device from which a plurality of cords are drawn, and
An extruder for coating a plurality of cords drawn from the cord supply device with rubber;
Cutting means for cutting the end of the rubber-coated cord member in which the cord is covered with rubber;
In a rubber-coated cord member manufacturing apparatus comprising a joining means for joining ends of cut rubber-coated cord members to each other,
A roller with a split groove that locks and winds a plurality of cords drawn from the insulation head of the extruder into the split groove;
An apparatus for manufacturing a rubber-coated cord member, comprising: a driving unit that rotationally drives the roller with the split groove.

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