JP2009083458A - Apparatus and method of manufacturing unvulcanized tire with arranged cord reinforcement member, and cord reinforcement member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent joint separation of a tire component member and to efficiently manufacture a tire. <P>SOLUTION: A plurality of rollers 50 are arranged along the circumferential direction inside a cylindrical cord reinforcement member 54 and then, while pressing the cord reinforcement member 54, each of the rollers 50 is moved along the inclined side face of an unvulcanized tire 52 to stick the cord reinforcement member 54 to the tire. Further, the moving speed in the radial direction of the rollers 50 is controlled by a controller so that the diameter of the cord reinforcing member 54 is expanded, while stretching the coating rubber 54B of the cord reinforcing member 54 in a peripheral direction so as not to cause the joint separation due to large tensile force applied to the joint part of the cord reinforcing member 54. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an apparatus for manufacturing an unvulcanized tire provided with a cord reinforcing member, a method for manufacturing an unvulcanized tire provided with a cord reinforcing member, and a cord reinforcing member.

  In heavy-duty pneumatic radial tires and the like, a tire component such as a wire chafer is attached to the tire side for reinforcement in order to reduce the falling deformation of the bead portion and increase the durability of the bead portion (for example, Patent Document 1).

  In general, when reinforcing the tire side, first, a belt-shaped tire constituent member coated with a plurality of cords arranged in parallel to each other with rubber is manufactured, and then a tire manufactured in advance at the time of forming a green tire. The constituent member is wound around a predetermined position of the lower layer member on the outer periphery of the forming drum, and one or more layers are wound, and the end portions in the circumferential direction are joined to form a cylindrical shape.

As a method of attaching the cylindrical tire constituent member to the side surface of the green tire, an end portion of the cylindrical tire constituent member wound around the forming drum is inflated with a side bladder provided on the drum, and a part of the diameter is expanded. There is a method of attaching (while turning back) (for example, see Patent Document 2).
JP-A-5-112109. Japanese Patent Laid-Open No. 7-178845.

However, when the side bladder is used, the timing, speed, and force of the folding operation are determined by the gas pressure, and it is difficult to control them individually. In particular, in the process of folding the cylindrical tire component, a circumferential length difference occurs between the inner circumferential side and the outer circumferential side in the radial direction at the time of folding, and the joint portion on the outer circumferential side is particularly greatly pulled in the circumferential direction and peeled off. There was a problem of opening. For this reason, there has been a demand for an apparatus that performs pasting while performing this folding operation so that joint opening does not occur.
Although a method of reinforcing rubber coated cords one by one on the side of a green tire can be considered, there is a problem that it takes too much time to manufacture one tire.

  In consideration of the above-mentioned fact, the present invention prevents the joint opening when expanding the diameter of the cylindrical tire constituent member, and has not yet added a cord reinforcing member that can attach the tire constituent member efficiently and appropriately. An object of the present invention is to provide an apparatus for manufacturing a vulcanized tire, a method for manufacturing an unvulcanized tire provided with a cord reinforcing member, and a cord reinforcing member.

  An apparatus for manufacturing an unvulcanized tire having the cord reinforcing member according to claim 1 supports a second tire constituent member to be attached to a side surface of a first tire constituent member formed in an annular shape in a cylindrical shape. A plurality of supporting means, a roller provided along the circumferential direction of the supporting means, and a roller for pressing the second tire constituent member against the first tire constituent member, and the roller as the first tire constituent Roller driving means for supporting the member so as to be movable in the axial direction and the radial direction of the member, and moving the roller at a preset speed along the surface shape of the first tire constituent member. .

Next, the operation of the unvulcanized tire manufacturing apparatus provided with the cord reinforcing member according to claim 1 will be described.
The unvulcanized tire manufacturing apparatus provided with the cord reinforcing member according to claim 1 includes a second tire constituent member formed in a cylindrical shape with respect to the first tire constituent member formed in an annular shape. The support means supports the second tire constituent member, which is used when the diameter is expanded and attached.

For example, when the first tire constituent member is a carcass formed in a toroidal shape, and the second tire constituent member is a reinforcing member that is disposed on the outer surface of the bead portion and reinforces the bead portion, it is cylindrical. One end side in the axial direction of the formed reinforcing member is arranged near the inner peripheral end of the carcass.
Next, the second tire constituent member can be attached to the first tire constituent member while expanding the diameter of the second tire constituent member by moving a roller disposed inside the reinforcing member formed in a cylindrical shape.

  Here, the speed at the time of expanding the diameter of the second tire constituent member formed by joining the longitudinal ends of the belt-like member into a cylindrical shape or joining a plurality of strip-like member members into a cylindrical shape is obtained. If it is fast, when the diameter is expanded, a circumferential length difference occurs between the inner diameter side and the outer diameter side, and the joint portion on the outer circumferential side (radially outer portion) may open due to the tension generated by the circumferential length difference. In the unvulcanized tire manufacturing apparatus provided with the cord reinforcing member, the tension generated when expanding the diameter is absorbed by extending the second tire constituent member in the circumferential direction so that a large tension does not act on the joint portion. By setting the moving speed of the roller (the diameter expansion speed of the second tire constituent member) in advance, joint opening can be suppressed. In order to suppress the joint opening, the moving speed of the roller may be changed during the diameter expanding operation, for example, gradually increasing the speed slowly at the beginning and gradually decreasing the speed at the beginning.

  The roller of the unvulcanized tire manufacturing apparatus provided with the cord reinforcing member according to claim 1 is supported by roller driving means so as to be movable in the axial direction and the radial direction of the first tire constituent member. Therefore, even if the portion where the second tire constituent member is attached is inclined as viewed in a cross section along the axis or is curved, the roller is arranged along the surface shape of the attachment portion. It can be reliably attached to the first tire constituent member while pressing the member.

  Invention of Claim 2 is the manufacturing apparatus of the unvulcanized tire which distribute | arranged the cord reinforcement member of Claim 1, The said roller drive means is 1st moving means to move the said roller to the said radial direction And guide means for supporting the roller movably along the axial direction; and an elastic member for elastically urging the roller in the axial direction and in a direction approaching the first tire constituent member; It is characterized by having.

Next, the operation of the unvulcanized tire manufacturing apparatus provided with the cord reinforcing member according to claim 2 will be described.
The roller is moved by the first moving means when moving in the radial direction.
Since the roller is supported by the guide means so as to be movable in the axial direction, the roller is movable in the axial direction.

  Since the roller is elastically biased by the elastic member in a direction approaching the first tire constituent member, the roller can be pressed against the second tire constituent member by the biasing force of the elastic member.

  If the part where the second tire component is affixed is slanted or viewed in a cross section along the axis, it will be elastic by the axial dimension of the slanted part or curved part when the roller is moved in the radial direction. Since the member is deformed, the roller can move along the pasting portion while maintaining the pressure.

  According to a third aspect of the present invention, in the unvulcanized tire manufacturing apparatus provided with the cord reinforcing member according to the second aspect, the first moving means has at least a moving speed of the roller in the radial direction. It is connected with the control means to control, It is characterized by the above-mentioned.

Next, the operation of the unvulcanized tire manufacturing apparatus provided with the cord reinforcing member according to claim 3 will be described.
In the unvulcanized tire manufacturing apparatus provided with the cord reinforcing member according to the third aspect, the moving speed in the radial direction of the roller is controlled by the control apparatus, and the moving speed can be varied. Therefore, the second tire constituent member may be attached to the first tire constituent member at an optimal speed that suppresses the joint opening of the second tire constituent member and minimizes the attaching time. it can.

  For example, in a region where the joint portion is likely to open, the second tire component is gradually deformed so as to reduce the speed so that a large tension does not act on the joint portion, and in a region where the joint portion is unlikely to open, the speed is increased. Raise and paste efficiently.

  The manufacturing method of the unvulcanized tire which arranged the cord reinforcement member according to claim 4 supports the cylindrical 2nd tire constituent member stuck on the side of the 1st tire constituent member formed in the annular shape. A first step, a plurality of rollers are arranged along the circumferential direction inside the second tire constituent member, and the second tire constituent member is pressed against the first tire constituent member and the first tire. By sequentially moving to the radially outer side along the surface shape of the component member at a preset speed, at least a part of the second tire component member is attached to the side surface of the first tire component member while increasing the diameter. And a second step.

The method for producing an unvulcanized tire having the cord reinforcing member according to claim 4 is a cylindrical second tire to be attached to a side surface of the first tire constituent member formed in an annular shape in the first step. The component is supported.
In the next second step, a plurality of rollers are arranged along the circumferential direction inside the second tire constituent member, and the plurality of rollers are preliminarily radially outward along the surface shape of the first tire constituent member. By moving at a set speed, at least a part of the second tire constituent member is attached to the side surface of the first tire constituent member while expanding the diameter.

  Here, the longitudinal speed of the belt-shaped member is increased when the second tire constituent member having a cylindrical shape is formed by joining the longitudinal ends of the belt-shaped member or by joining a plurality of strip-shaped members. If it is fast, when the diameter is expanded, a circumferential length difference occurs between the inner diameter side and the outer diameter side, and the joint portion on the outer circumferential side (radially outer portion) may open due to the tension generated by the circumferential length difference. In the tire component member affixing method, the tension generated when the diameter is expanded is absorbed by extending the second tire component member in the circumferential direction so that a large tension acts on the joint portion and the joint opening does not occur. The movement speed (the diameter expansion speed of the second tire constituent member) is set in advance, so that joint opening can be suppressed. In order to suppress the joint opening, the moving speed of the roller may be changed during the diameter expanding operation, for example, gradually increasing the speed slowly at the beginning and gradually decreasing the speed at the beginning.

  Further, in the method for manufacturing an unvulcanized tire in which the cord reinforcing member according to claim 4 is arranged, a portion to which the second tire constituent member is attached is inclined as viewed in a cross section along the axis, or is curved. Even if it exists, since it moves, pressing a 2nd tire structural member along the surface shape of a sticking part, a roller can be reliably affixed on a 1st tire structural member.

  The invention according to claim 5 is a sheet-like cord reinforcing member in which a plurality of cords arranged at intervals in parallel to each other are embedded in an unvulcanized coated rubber, wherein the cords are arranged. It is characterized in that the portion where the cord is not arranged is formed thinner than the portion.

Next, the operation of the cord reinforcing member according to claim 5 will be described.
A typical cord reinforcing member used for manufacturing a tire has a constant thickness as a whole. When jointing, end faces are joined together (so-called butt joint), or a part of the end side is overlapped. (So-called overlap joints), but the strength against tension is low compared to other parts than joints.

  Accordingly, the ends of the long cord reinforcing members are joined to form a cylindrical shape, and when a circumferential tension acts on the cylindrical cord reinforcing member, the joint portion is opened by the tension. .

On the other hand, in the cord reinforcing member according to claim 5, since the portion where the cord is not arranged is formed thinner than the portion where the cord is arranged, the cord is not arranged when the tension is applied. Since there are many thin parts where the cord is stretched and no cord is arranged, the tension is absorbed and relaxed by extending each thin part, and the tension acting on the joint part is reduced, so that the joint opening can be suppressed. it can.
The technical idea of making the part where the cord is not arranged thinner than the part where the cord is arranged is that the tensile strength of the thin part where the cord is not arranged is equal to or less than the tensile strength of the joint part It is to be.

  According to a sixth aspect of the present invention, in the cord reinforcing member according to the fifth aspect, when the maximum thickness of the portion where the cord is disposed is T and the minimum thickness of the portion where the cord is not disposed is t In addition, t / T is set within a range of 0.2 to 0.8.

Next, the operation of the cord reinforcing member according to claim 6 will be described.
By setting the ratio t / T between the maximum thickness T of the cord portion and the minimum thickness t of the portion without the cord to be in the range of 0.2 to 0.8, the cord is arranged when tension is applied. It is possible to reliably extend the part that is not, and to prevent joint opening.

If t / T is less than 0.2, the portion where the cord is not arranged becomes too thin, and there is a possibility that a crack will occur in the thin portion where the cord is not arranged when the tension is applied.
On the other hand, if t / T exceeds 0.8, the portion where the cord is not arranged becomes difficult to extend, and there is a possibility that joint opening cannot be suppressed. In this respect, t / T is more preferably 0.7 or less.

  As described above, the unvulcanized tire manufacturing apparatus in which the cord reinforcing member of the present invention is arranged and the unvulcanized tire manufacturing method in which the cord reinforcing member is arranged are used for expanding the diameter of the cylindrical tire constituent member. The joint opening of the tire is suppressed, and the tire constituent member can be attached efficiently and appropriately.

  Since the cord reinforcing member of the present invention has the above-described configuration, it has an excellent effect that the joint opening when the cord reinforcing member is subjected to diameter expansion deformation can be suppressed and the bonding can be performed efficiently and appropriately.

[First Embodiment]
Next, an unvulcanized tire manufacturing apparatus 10 according to a first embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the unvulcanized tire manufacturing apparatus 10 includes a column 14 installed on a floor surface.

One end side of a shaft 16 extending in the horizontal direction is attached to the upper portion of the support column 14.
A drum 18 for forming an unvulcanized tire is disposed on the other end side of the shaft 16. The drum 18 includes an annular core 18A to which tire constituent members such as an inner liner, a carcass ply, a bead core, and a wire chafer are attached, and a support (chuck) 18B that supports the core 18A. The support 18 </ b> B is attached to a drive shaft 19 that extends in a direction opposite to the shaft 16. A hole 21 is formed in the central portion of the support 18B, and the other end of the shaft 16 is inserted into the hole 21.
The structure of the portion to which the tire constituent member is affixed is not limited to the structure shown in FIG. 1, but may be another structure such as a molding drum or a core that bulges and deforms in a toroidal shape, and the name is also a drum. Not necessarily.

  A bead lock device 22 for positioning the bead core 20 is attached to the shaft 16 on one side of the drum 18. In the bead lock device 22, a plurality of blocks 25 are attached to a shaft 16 along a circumferential direction via a disk 23. A first cylinder 24 is arranged in the center of the block 25. In the block 25, slide bearings (not shown) are arranged on both sides of the first cylinder 24, and a slide shaft 27 is slidably inserted into the slide bearings.

  A bead support portion 26 that supports the bead core 20 is attached to the rod 24 </ b> A of the first cylinder 24 and the slide shaft 27. In addition, the rod 24A of the first cylinder 24 and the slide shaft 27 are arranged along the radial direction.

  As shown in FIG. 2, the first cylinder 24 includes a compressor, a regulator, a solenoid valve, and the like, and is connected to a pressure source 29 controlled by a control device 51, and the bead lock device 22 is controlled by the control device 51. It is configured to be.

  As shown in FIG. 1, a slide bearing 28 is slidably inserted into the shaft 16 between the bead lock device 22 and the support column 14. In addition, a coil spring 30 for energizing the slide bearing 28 toward the drum 18 is provided on the shaft 16 between the slide bearing 28 and the support column 14.

A cylindrical member 34 is attached to the slide bearing 28 via a support member 32 that extends radially outward.
An annular plate member 36 is attached to the column side end of the cylindrical member 34. A plurality of blocks 38 are attached to the side surface of the plate member 36 on the column side along the circumferential direction.

A second cylinder 40 is arranged in the center of the block 38, and slide bearings (not shown) are arranged on both sides of the second cylinder 40.
The axis of the second cylinder 40 and the axis of the slide bearing 42 are each arranged along the radial direction of the shaft 16.
A slide shaft 44 is slidably inserted into the slide bearing 42.

  A substantially L-shaped moving member 46 is disposed on the shaft 16 side of the block 38, and one end of the slide shaft 44 and the tip of the rod 40 </ b> A of the second cylinder 40 are fixed to the moving member 46. Therefore, by moving the rod 40A of the second cylinder 40 in and out, the moving member 46 can be moved in the radial direction of the shaft 16 (arrow A direction).

  A roller support column 48 extending toward the outer side in the radial direction of the shaft 16 is attached to an end portion on the drum side of the moving member 46, and the roller 50 is rotatable at the outer end in the radial direction of the roller support column 48. It is attached. The axis of the roller 50 is a direction orthogonal to the axis 16.

  As shown in FIG. 2, the second cylinder 40 is connected to a pressure source 53 that includes a compressor, a regulator, a solenoid valve, and the like and is controlled by a control device 51, and the moving speed in the radial direction of the roller 50 is controlled by the control device. 51 to be controlled. In addition, the moving speed, the moving amount, and the like of the roller 50 are stored in the control device 51 in advance.

(Function)
Next, the main part of the manufacturing process of the unvulcanized tire using the manufacturing apparatus 10 of the unvulcanized tire of this embodiment is demonstrated.
As shown in FIG. 1, the production of an unvulcanized tire in which an unvulcanized tire (in the present embodiment, only the bead core 20, the inner liner 56, the carcass ply 58, and the bead filler 60 in this embodiment) 52 is supported by the drum 18. In the apparatus 10, a cylindrical cord reinforcing member 54 is disposed outside the cylindrical member 34 and the bead support portion 26 in the radial direction.

  For example, as shown in FIG. 3, the cord reinforcing member 54 is a plurality of cords 54A arranged in parallel to each other and coated with unvulcanized coating rubber 54B to form a strip having a constant thickness. It is manufactured, and a plurality of end portions in the width direction are joined and connected. In this embodiment, this connection is performed on the outer peripheral surface of the cylindrical member 34 as shown in FIG. 3. However, the strip-shaped cord reinforcing member 54 is a different cylindrical member (drum) different from the cylindrical member 34. The completed cylindrical cord reinforcing member 54 may be transferred to the cylindrical member 34.

Next, a process of expanding the diameter of the cylindrical cord reinforcing member 54 and attaching it to the side surfaces of the carcass ply 58 and the bead filler 60 will be described.
First, in the initial state, as shown in FIG. 1, the roller 50 is disposed inside the cylindrical cord reinforcing member 54. In this initial position, the slide bearing 28 is urged by the coil spring 30, so that the roller 50 is in contact with the bead support portion 26 of the bead lock device 22. And the control apparatus 51 operates the 1st cylinder 24 and the 2nd cylinder 40 from this initial state, and pushes out the bead support part 26 and the roller 50 to a radial direction outer side, respectively.

As shown in FIG. 4, after the bead core 20 is fixed by the bead support part 26, the cord reinforcing member 54 is pushed up radially outward, and a part of the cord reinforcing member 54 is expanded in diameter and pressed against the outer surface of the carcass ply 58. And pasted. The pressing force of the cord reinforcing member 54 can be adjusted by the coil spring 30.
At this time, since the tension in the circumferential direction acts on the portion of the cord reinforcing member 54 whose diameter is increased, the unvulcanized rubber portion on which the tension is acting is plastically deformed and stretched in the circumferential direction.

  As shown in FIG. 5, when the roller 50 is further pushed outward in the radial direction, the roller 50 moves along the inclined side surface of the bead filler 60 while pressing the cord reinforcing member 54, and the roller 50 is moved to the bead filler. Since the reaction force is received from 60, the slide bearing 28 slides to the column side and compresses the coil spring 30. That is, the urging force of the coil spring 30 is always acting on the roller 50 moved radially outward. If the roller 50 moves to the end of the cord reinforcing member 54, the pasting is completed (end of diameter expansion of the cord reinforcing member 54).

  In the unvulcanized tire manufacturing apparatus 10 of the present embodiment, as described above, tension is applied to the rubber portion and the joint portion J in order to expand the diameter of the cylindrical cord reinforcing member 54. Movement of the roller 50 in the radial direction so that the cord reinforcing member 54 is expanded in diameter while plastically deforming the coating rubber 54B and extending in the circumferential direction so that a large tension does not act on the joint portion J and the joint is not opened. The speed is controlled by the control device 51.

  In the control device 51, the moving speed, the moving amount, and the like of the roller 50 are stored in advance for each type of tire so that joint opening does not occur. In addition, the movement speed of the roller 50 may be changed during the diameter expansion operation, for example, in order to suppress the opening of the joint portion J, for example, the speed is gradually increased at the beginning and gradually decreased at the beginning. Depending on the cord reinforcing member 54, various shift patterns of the moving speed are conceivable.

In the unvulcanized tire manufacturing apparatus 10 of this embodiment, the pressing force of the roller 50 is set by the coil spring 30, the moving speed of the roller 50 is set by the control device 51, and the pressing force and the moving speed are individually controlled. Therefore, the diameter of the cord reinforcing member 54 can be increased while suppressing the joint opening, and the high-quality unvulcanized tire 52 can be efficiently manufactured.
After that, the unvulcanized tire 52 is completed by pasting tire constituent members such as a belt, tread rubber, and side rubber to the carcass ply 58 by a conventional method.

[Second Embodiment]
Next, the cord reinforcing member 54 according to another embodiment will be described.
As shown in FIG. 6, the cord reinforcing member 54 of the present embodiment includes a plurality of cords 54A arranged in parallel to each other as in the first embodiment. The portion 64 where the cord 54A is not disposed is thinner than the portion 62 where the cord 54 is disposed.

  Thus, by partially reducing the thickness of the cord reinforcing member 54, a portion where the cord 54A is not disposed when tension (arrow B direction: equivalent to the tire circumferential direction) acts on the cord reinforcing member 54. 64 becomes easier to extend than in the first embodiment, the tension acting on the joint portion J is greatly reduced, and the opening of the joint portion J can be further suppressed.

  The cord reinforcing member 54 sets the thickness of the portion 64 where the cord 54A is not disposed so that the tensile strength of the joint portion J and the tensile strength of the portion 64 where the cord 54A is not disposed are substantially the same. It is preferable to do.

  For example, as shown in FIG. 6A, in the cord reinforcing member 54, the maximum thickness of the portion 62 where the cord 54A is disposed is T, and the minimum thickness of the portion 64 where the cord 54A is not disposed is t. The ratio t / T is preferably set in the range of 0.2 to 0.8.

In addition, as a joint method of the cord reinforcing member 54, as shown in FIGS. 7 and 8, a butt joint for joining the end faces of the portion 64 where the cord 54A is not disposed, as shown in FIGS. There is an overlap joint that overlaps the parts.
Further, as shown in FIG. 12, the cord reinforcing member 54 is manufactured by arranging a plurality of cords 54 covered with a coating rubber 54B and joining the side portions to each other, as shown in FIG. Although there is a method of extruding a coating rubber (not shown) together with a cord 54A from a base 66 in which thick portions and thin portions are alternately arranged, a coating rubber 54B is provided between rollers in which a plurality of semicircular arc-shaped grooves are formed. , And the code 54A may be passed through other methods.

  Similarly to the first embodiment, the cord reinforcing member 54 of the present embodiment is formed into a strip shape having a constant thickness by covering a plurality of cords 54A arranged in parallel with each other with an unvulcanized coating rubber 54B. A plurality of products are manufactured and connected in the width direction.

  As described above, the cord reinforcing member 54 of this embodiment has a ratio t / T between the maximum thickness T of the portion 62 where the cord 54A is disposed and the minimum thickness t of the portion 64 where the cord 54A is not disposed. Since it is set within the range of 0.2 to 0.8, when the cord reinforcing member 54 is expanded in diameter and tension is applied, the portions 64 where the respective cords 54A are not disposed are surely extended, and the joint portion J is expanded. Since the acting tension is lowered and relaxed, the effect of suppressing joint opening is increased.

  By using the cord reinforcing member 54 of the present embodiment for the unvulcanized tire 52 manufactured by the unvulcanized tire manufacturing apparatus 10, the effect of suppressing joint opening is greatly enhanced, and the bonding speed (cord reinforcement) It is possible to increase the diameter expansion speed of the member 54 and shorten the manufacturing time of the unvulcanized tire 52.

[Third Embodiment]
Next, an unvulcanized tire manufacturing apparatus 10 according to a third embodiment of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the same structure as 1st Embodiment, and the description is abbreviate | omitted.
As shown in FIG. 14, the unvulcanized tire manufacturing apparatus 10 of this embodiment includes a cylindrical main frame 70. The main frame 70 is horizontally attached to the flange 72 of the rotary main shaft. Inside the main frame 70, a feed screw 76 is rotatably supported via a bearing 74. The feed screw 76 is connected to the servo motor 80 via a coupling 78 at the end on the arrow R direction side. The servo motor 80 is controlled by the control device 51. A nut 82 is screwed into the feed screw 76.

A plurality of slits 84 extending in the axial direction are formed in the middle portion of the main frame 70 in the circumferential direction. A first slide base 86 is slidably inserted in each slit 84 in the longitudinal direction of the slit 84.
A groove 86A is formed in the intermediate portion of the first slide base 86, and a part of the nut 82 is fitted in the groove 86A. Further, the first slide base 86 and the nut 82 are connected by a key. For this reason, when the feed screw 76 is rotated, the nut 82 does not rotate but moves only in the axial direction integrally with the plurality of first slide bases 86.

A plurality of arms 92 extending radially outward are attached to the first slide base 86. A cylindrical cone-shaped ring 93 is attached to the radially outer end of the arm 92, and a plurality of first linear guides 94 that are inclined with respect to the axial direction of the feed screw 76 are fixed to the outer periphery of the ring 93. An extension frame 96 is connected to the first linear guide 94.
A second linear guide 98 extending in the radial direction is attached to an end of the main frame 70 on the arrow L direction side, and an extension frame 96 is attached to the second linear guide 98 in the radial direction (arrow A direction). It is supported movably.

As described above, since the first linear guide 94 is inclined with respect to the feed screw 76, when the first slide base 86 moves in the direction of the arrow L, the expansion frame 96 moves outward in the radial direction. When the slide base 86 moves in the direction of arrow R, the expansion frame 96 moves inward in the radial direction.
A second slide base 102 is movably supported on the extension frame 96 via a third linear guide 100 arranged in parallel with the feed screw 76.
A roller 50 is rotatably attached to an end of the second slide base 102 on the arrow L direction side. A plurality of the second slide bases 102 to which the rollers 50 are attached are arranged at equal intervals around the axis of the feed screw 76, and the cylindrical cord reinforcing member 54 can be supported from the inner peripheral side. It is said.

  A tension coil spring 104 is attached to the end of the extension frame 96 on the arrow L direction side and the end of the second slide base 102 on the arrow R direction side so as to urge the second slide base 102 in the arrow L direction. It has been.

  Further, an annular cylinder 106 is attached to the main frame 70 on the arrow R direction side from the center portion. An annular piston 108 is disposed in the cylinder 106 so as to be movable in the axial direction. A piston rod 109 extending in the direction of arrow L is attached to the piston 108.

One end of the link 103 is slidably connected to the tip of the piston rod 109 on the arrow L direction side via a pin 105.
A fourth linear guide 107 extending along the radial direction is arranged at the end of the main frame 70 on the arrow L direction side. The fourth linear guide 107 has a bead support portion 111 in the radial direction. It is supported movably. The other end of the link 103 described above is connected to a slide block of the fourth linear guide 107 via a pin 110.

Therefore, when the piston rod 109 moves in the arrow L direction, the bead support portion 111 moves radially outward via the link 103, and when the piston rod 109 moves in the arrow R direction, the bead support portion 111 moves through the link 103 in diameter. It is designed to move inward.
The cylinder 106 is connected to a hydraulic device (not shown) so that the piston 108 can be moved in the directions of the arrow L and the arrow R.

(Function)
Next, the main part of the manufacturing process of the unvulcanized tire using the manufacturing apparatus 10 of the unvulcanized tire of this embodiment is demonstrated.
As shown in FIG. 14, in the unvulcanized tire manufacturing apparatus 10 in which an unvulcanized tire 52 being manufactured is supported by the drum 18, a cylindrical shape is formed radially outward of the second slide base 102 and the bead support portion 111. The cord reinforcing member 54 is disposed.

Next, a process of expanding the diameter of the cylindrical cord reinforcing member 54 and attaching it to the side surfaces of the carcass ply 58 and the bead filler 60 will be described.
First, in the initial state, as shown in FIG. 14, the piston 108 is disposed on the arrow R direction side, the bead support portion 111 is disposed on the radial inner side of the cord reinforcing member 54, and the nut 82 is also disposed on the arrow R direction side. The roller 50 is also disposed inside the cord reinforcing member 54.
Then, the control device 51 operates a hydraulic device (not shown) from this initial state, moves the piston 108 in the direction of arrow L as shown in FIG. 15, and moves the bead support portion 111 outward in the radial direction, thereby reinforcing the cord reinforcing member. One end portion in the arrow L direction of 54 is crimped to the carcass ply 58.

  Next, the feed screw 76 is rotated by the servo motor 80, and as shown in FIG. 16, the nut 82 is moved to the arrow L direction side, and each expansion frame 96 is moved radially outward. When the expansion frame 96 moves radially outward, the roller 50 moves radially outward, the cord reinforcing member 54 is pushed up radially outward, the cord reinforcing member 54 expands and is pressed against the outer surface of the carcass ply 58. When the roller 50 further moves outward in the radial direction, the roller 50 moves along the inclined side surface of the bead filler 60 while pressing the cord reinforcing member 54.

  At this time, since the roller 50 receives a reaction force from the bead filler 60, the second slide base 102 slides in the direction of the arrow R to stretch the tension coil spring 104. That is, the urging force of the tension coil spring 104 always acts on the roller 50 that is moved radially outward to press the cord reinforcing member 54 against the outer surface of the carcass ply 58. The pressing force of the cord reinforcing member 54 can be adjusted by the tension coil spring 104. When the roller 50 moves to the end of the cord reinforcing member 54, the pasting is finished (end of diameter expansion of the cord reinforcing member 54).

  In the unvulcanized tire manufacturing apparatus 10 of this embodiment, the moving speed of the roller 50 can be controlled by controlling the rotational speed of the servo motor, and a large tension acts on the joint portion J of the cord reinforcing member 54 to open the joint. The cord reinforcing member 54 can be expanded in diameter while plastically deforming the coating rubber 54B and extending it in the circumferential direction.

In the unvulcanized tire manufacturing apparatus 10 of this embodiment, the pressing force of the roller 50 is set by the tension coil spring 104, the moving speed of the roller 50 is set by the control device 51, and the pressing force and the moving speed are individually set. It can be set. The expansion speed of the second slide base 102 can be changed by the control device 51 in accordance with the cord reinforcing member 54, and stable folding can be performed by applying a partial strength. Moreover, since only one driving device is required and the diameter of the folded roller 50 can be increased uniformly, the device can be made more compact, and the cord reinforcing member 54 can be applied evenly and accurately on the circumference.
Therefore, also in the present embodiment, as in the above-described embodiment, the cord reinforcing member 54 can be expanded while suppressing the joint opening, and the high-quality unvulcanized tire 52 can be efficiently manufactured.

  Although the present invention has been described in detail with respect to specific embodiments, the present invention is not limited to such embodiments, and various other embodiments are possible within the scope of the present invention. It is clear to the contractor.

It is sectional drawing of the manufacturing apparatus of the unvulcanized tire which concerns on the 1st Embodiment of this invention. It is a block diagram of a control system. It is a perspective view of a cord reinforcement member. It is sectional drawing of the manufacturing apparatus of the unvulcanized tire which shows the middle of diameter expansion of a cord reinforcement member. It is sectional drawing of the manufacturing apparatus of the unvulcanized tire which shows the time of completion | finish of diameter expansion of a cord reinforcement member. (A) is sectional drawing of a cord reinforcement member, (B) is a top view of a cord reinforcement member. It is explanatory drawing which shows the joint method of a cord reinforcement member. It is explanatory drawing which shows the joint method of a cord reinforcement member. It is explanatory drawing which shows the joint method of a cord reinforcement member. It is explanatory drawing which shows the joint method of a cord reinforcement member. It is explanatory drawing which shows the joint method of a cord reinforcement member. It is explanatory drawing which shows the manufacturing method of a cord reinforcement member. It is a front view of a nozzle | cap | die. It is sectional drawing of the manufacturing apparatus of the unvulcanized tire which concerns on the 3rd Embodiment of this invention which shows the state before sticking of a cord reinforcement member. It is sectional drawing of the manufacturing apparatus of the unvulcanized tire which concerns on the 3rd Embodiment of this invention which shows the state in the middle of sticking of a cord reinforcement member. It is sectional drawing of the manufacturing apparatus of the unvulcanized tire which concerns on the 3rd Embodiment of this invention which shows the state in the middle of sticking of a cord reinforcement member (just before completion | finish).

Explanation of symbols

10 Unvulcanized tire manufacturing equipment 16 Shaft (guide means)
28 Slide bearing (guide means)
30 Coil spring (elastic member)
32 Support member (guide means)
34 Cylindrical member (support means, guide means)
36 Plate material (guide means)
38 block 40 second cylinder (roller driving means, first moving means)
46 moving member (roller driving means, first moving means)
48 Roller support column (roller drive means, first moving means)
50 roller 51 control device (control means)
52 Unvulcanized tire (first tire component)
54 Cord reinforcing member (second tire component)
54B Coated rubber (Coated rubber)
54A code 76 feed screw (first moving means)
78 Coupling (first moving means)
80 Servo motor (first moving means)
82 Nut (first moving means)
86 First slide base (first moving means)
92 arm (first moving means)
93 ring (first moving means)
94 1st linear guide (1st moving means)
96 Expansion frame (first moving means, guide means)
98 second linear guide (first moving means)
100 Third linear guide (first moving means, guide means)
102 2nd slide base (1st moving means, guide means)
104 Tensile coil spring (elastic member)

Claims (6)

A supporting means for supporting the second tire constituent member to be attached to the side surface of the first tire constituent member formed in an annular shape in a cylindrical shape;
A plurality of rollers are provided along the circumferential direction of the support means, and a roller for pressing the second tire constituent member against the first tire constituent member,
Roller driving means for supporting the roller so as to be movable in the axial direction and the radial direction of the first tire constituent member, and moving the roller at a preset speed along the surface shape of the first tire constituent member. When,
An apparatus for producing an unvulcanized tire provided with a cord reinforcing member.   The roller driving means includes first moving means for moving the roller in the radial direction, guide means for supporting the roller movably along the axial direction, the roller in the axial direction, and the first An apparatus for manufacturing an unvulcanized tire provided with a cord reinforcing member according to claim 1, further comprising: an elastic member that elastically biases the tire in a direction of approaching one tire constituent member.   3. The unvulcanized reinforced vulcanized member according to claim 2, wherein the first moving unit is connected to a control unit that controls at least a moving speed of the roller in the radial direction. Tire manufacturing equipment. A first step of supporting a cylindrical second tire constituent member to be attached to the side surface of the first tire constituent member formed in an annular shape;
A plurality of rollers are arranged along the circumferential direction inside the second tire constituent member, and the second tire constituent member is pressed against the first tire constituent member and the surface shape of the first tire constituent member A second step of sequentially affixing at least a part of the second tire constituent member to a side surface of the first tire constituent member while moving radially outward along a predetermined speed at a predetermined speed. ,
A method for producing an unvulcanized tire provided with a cord reinforcing member. A sheet-like cord reinforcing member in which a plurality of cords arranged at intervals in parallel to each other are embedded in an unvulcanized coated rubber,
A cord reinforcing member characterized in that a portion where no cord is arranged is formed thinner than a portion where a cord is arranged.   T / T was set within the range of 0.2 to 0.8, where T is the maximum thickness of the portion where the cord is disposed, and t is the minimum thickness of the portion where the cord is not disposed. The cord reinforcing member according to claim 5.

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