JP2668400B2 - Tire forming method and apparatus - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire molding method and apparatus for molding a green tire by a two-stage method.

2. Description of the Related Art Conventionally, to form a green tire, as described in Japanese Patent Publication No. 62-35381, first, an inner runner, a carcass, etc. are attached around a carcass band forming drum to form a cylindrical carcass band. After molding, the carcass band was transferred from the carcass band forming drum to the green case forming drum by band transfer, and then a pair of beads was set on the carcass band on the green case forming drum by a bead setting device. Thereafter, the carcass band axially outside the bead is turned around the bead by the turn-up device. next,
A side wall, a rim cushion, and the like are supplied from the material supply device to such a carcass band, and a green case is formed around the carcass band. next,
When such a green case is received from the green case forming drum by the green case transfer, the green case transfer moves up and then moves toward the green tire forming drum to avoid interference with the green case forming drum. To transport. And
The green case transfer descends just before the green tire forming drum, and then transfers the green case to the green tire forming drum. On the other hand, in a belt / tread structure forming drum installed between a green case forming drum and a green tire forming drum, a belt and a tread are pasted one after another around the drum to form an annular belt / tread structure. There is. Then, the belt / tread structure is transferred from the belt / tread structure forming drum to the periphery of the green case on the green tire forming drum by the belt / tread transfer. Next, when the green case is toroidally expanded inside the belt / tread structure by the green tire forming drum, the green case and the belt / tread structure are pressure-bonded to each other to form a green tire.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the tire molding method and apparatus as described above, folding of the carcass band is performed by a turn-up device different from the band transfer for transferring the carcass band. However, such a turn-up device waits at a standby position away from the moving path of the band transfer in order to avoid interference with the band transfer when the carcass band is transferred. For this reason, it is necessary to move the turn-up device from the standby position to the folding position at the time of starting the folding work of the carcass band, and as a result, there is a problem that working efficiency is reduced. In addition, since a special turn-up device is required for turning back the carcass band, there is a problem that the structure of the entire device is complicated and the size is increased.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method and an apparatus for forming a tire, which have a simple structure and a small size and can improve work efficiency.

Means for Solving the Problem The purpose is to form a carcass band by sequentially attaching an inner liner and a carcass around the carcass band forming drum, and to a predetermined position outside the carcass band by the first conveying means. A step of transporting and crimping the bead, a step of transporting and transferring the integrated bead and carcass band from the carcass band forming drum to the first forming drum by the first transporting means, and a step of moving the bead inside by the first forming drum. To fix the side tread around the bead by bending the folding bladder of the first forming drum while deforming the folding bladder of the first forming drum by the first conveying means while expanding the folding bladder of the first forming drum. Forming a green case by attaching the green case to the periphery of the green case; A step of conveying and transferring from the shaping drum to the second forming drum, and a band formed by sticking a belt and a tread around the band forming drum one after another, and a band formed by the third conveying means from the band forming drum to the second forming drum. And a step of transporting the green case to the outside of the green case, and the green case is attached to the band held by the third transporting means on the outside of the green case while deforming the green case into a toroidal shape by the second molding drum. And a carcass band forming drum for forming a carcass band by successively sticking an inner runner and a carcass around the inner runner, and a carcass band forming drum behind the carcass band forming drum. Positioned coaxially, gripping the bead from the inside and positioning and fixing Rutotomoni, first the side tread pasted around the carcass band forming a green case
A forming drum, which is movable between the carcass band forming drum and the first forming drum, transports the held bead to a predetermined position outside the carcass band and press-bonds the bead, and integrates the bead by the press-bonding; The carcass band is conveyed from the carcass band forming drum to the first forming drum and transferred, and the expanding folding bladders of the first forming drum are deformed to fold both ends of the carcass band in the axial direction around the bead. A first conveying means for returning, a second forming drum installed behind the first forming drum for deforming the green case into a toroidal shape, and movable between the first forming drum and the second forming drum. Transport means for transporting and transferring the first and second molding drums from the first and second molding drums; and a belt provided behind the first and second molding drums and surrounding the first and second molding drums. It is possible to move between the band forming drum that forms the band by attaching red one after another and the band forming drum and the second forming drum, and conveys the band from the band forming drum to the outside of the green case on the second forming drum. Then, the third case is attached to the outside of the green case deformed into a toroidal shape to form a green tire.

Here, the second transfer means is installed behind the first molding drum and on one side thereof, and is capable of temporarily holding the green case from the inside and holding holder capable of turning in a horizontal plane. A first transfer mechanism which is movable in a horizontal plane between the first forming drum and the holding holder, and transfers the green case received from the first forming drum to the holding holder while gripping the green case from the outside; A second transfer mechanism that is movable in a horizontal plane between the molding drum and a second holding mechanism that receives the green case from the holding holder that has rotated after receiving the green case and transfers the green case to the second molding drum while gripping it from the outside. Good.

Further, it is preferable that the second forming drum is disposed coaxially with the band forming drum immediately before the band forming drum.

Action First, an inner liner and a carcass are successively attached around the carcass band forming drum to form a carcass band. Next, the first conveying means holding the pair of beads is moved toward the carcass band forming drum to convey the beads to a predetermined position radially outside the carcass band, and the beads are conveyed to the carcass band at the position. Combine and integrate. Next, the first conveying means takes out the integrated bead and carcass band from the carcass band forming drum and then moves them backward to convey and transfer the bead and carcass band to the first forming drum. At this time, the beads are gripped from the inside together with the carcass band by the first forming drum and are positioned and fixed. Next, while expanding the folded bladder of the first forming drum, the folded bladder is deformed by the first conveying means to bend both axial ends of the carcass band around the bead. As described above, since the carcass band is folded back by using the first carrying means that has carried the carcass band, the position of the first carrying means at the end of carrying can be used as the starting position of the folding work. Thereby, the transfer operation and the return operation can be performed continuously without any loss time, and the operation efficiency can be improved. In addition, since the first transport means is used for both the transport of the carcass band and the turning of the carcass band, a special turn-up device is not required, and the structure of the entire device can be simplified and the size can be reduced. Next, a side tread is stuck around the carcass band on the first forming drum to form a green case. Next, the green case is transferred from the first forming drum to the second forming drum and transferred by the second transferring means. At this time, since the belt and the tread are pasted one after another around the band forming drum to form the band, the band is formed from the band forming drum to the radius of the green case on the second forming drum by the third conveying means. Transport to the outside in the direction. Next, while the green case is deformed into a toroidal shape by the second forming drum, the green case is adhered to the band held by the third conveying means to form a green tire. Although the above description has focused on one tire and described the work in the order of steps, the work is performed simultaneously on each drum.

In addition, according to the third aspect of the invention, the transfer path from the first forming drum to the second forming drum is divided into two to reduce the transfer cycle time. Here, when the entire route is traveled by one green case transfer as in the prior art, the cycle time of transfer becomes longer than the cycle time of other drums, and the work efficiency is reduced. In this way, work efficiency is improved. First,
Since the holding holder that can temporarily hold the green case is provided between the second transfer mechanisms, a short-term failure occurs in the second molding drum, or the cycle times of the first and second molding drums are slightly different. In such a case, the work can be continued without any problem. Moreover, since the bead set is eliminated from the operation on the first forming drum as described above, the bead setting device is eliminated from the periphery of the first forming drum, and a large space is created.
This made it possible to transfer the green case in the horizontal plane. As a result, safety is improved and energy can be saved. And Claim 3
In order to transfer the green case from the first forming drum to the second forming drum by the method described in 1 above, first, the first transfer mechanism receives the green case from the first forming drum, and holds the green case from the outside while holding the green case from the outside. It moves inside and is transferred to the holding holder. Next, when the green case is transferred from the first transfer mechanism to the holding holder, the holding holder temporarily holds the green case from the inside. next,
The holding holder is swung in a horizontal plane, and the green case is moved to a position where it can be delivered to and from the second transfer mechanism. Next, when the second transfer mechanism receives the green case from the holding holder, the second transfer mechanism moves in a horizontal plane,
While holding the green case from the outside, it is transferred to the second forming drum.

Further, according to the structure described in claim 4, as compared with the case where the band forming drum is arranged immediately before the second forming drum as in the conventional case, the band forming drum between the first forming drum and the second forming drum is The distance is shortened, and as a result, the cycle time for transferring the green case can be shortened, and the work efficiency is improved.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

1 and 2, reference numeral 1 denotes a flat base extending in the front-rear direction. A carcass band forming machine 2 is installed at the front end of the base 1. The carcass band forming machine 2 includes a driving unit 3, a main shaft 4 extending rearward from the driving unit 3, and driven and rotated intermittently by the driving unit 3;
And a scalable carcass band forming drum 5 provided at the tip of the carcass band. 6 is a carcass band forming drum 5
Is a servicer provided on one side of the
Is the inner liner 7 on the carcass band forming drum 5,
The carcass 8 and, if necessary, chafers and the like are supplied one after another and attached around the carcass band K.
Are molded (see FIG. 6 (a)).

A first molding machine 16 is installed on the base 1 behind the carcass band molding machine 2, and the first molding machine 16 has a drive unit.
17, a main shaft 18 extending forward from the driving unit 17 (carcass band forming drum 5) and intermittently driven and rotated by the driving unit 17, and provided at the tip of the main shaft 18 and coaxially expanding and contracting with the carcass band forming drum 5. Possible first forming drum 19
And Reference numeral 20 denotes a servicer provided on one side of the first forming drum 19. The servicer 20 supplies a side tread 21 to the first forming drum 19 from an obliquely upper side.
It is stuck around the carcass band K on the forming drum 19 (see FIG. 5). The first molding drum 19 is shown in FIG. 6 (d).
As shown in the figure, having a plurality of arc-shaped segments 26 in the axial center thereof, these arc-shaped segments 26 are arranged equidistantly in the circumferential direction and have a cylindrical shape as a whole,
It is synchronously moved in the radial direction by a link mechanism (not shown), a cylinder or the like. Also, bladder receivers 27 are provided at both ends in the axial direction of the first forming drum 19, respectively.
Each of these bladder receivers 27 is provided with a folded bladder 28 which can be expanded and contracted. Also, arc segments
A plurality of bead lock bodies 29 are provided between both ends of the axial direction 26 of the bladder 27 and the bladder receiver 27, and these bead lock bodies 29 are also arranged equidistantly in the circumferential direction in the same manner as the arc-shaped segments 26. Then, these bead lock bodies 29 are moved in the radial direction in synchronization by a link mechanism, a cylinder, etc. (not shown), and are also moved by an equal distance in the axial direction by a rotating screw shaft or cylinder (not shown). And are separated from each other. Then, the first molding of the two-stage molding is performed by both the carcass band molding drum 5 and the first molding drum 19.

Referring again to FIGS. 1 and 2, a rail 31 extending in the front-rear direction is laid on the base 1 between the carcass band molding machine 2 and the first molding machine 16, and the rail 31 has a first conveying means 32. Are movably supported. This first transport means
As shown in detail in FIG. 3, the reference numeral 32 has a movable carriage 34 to which a slide bearing 33 is attached. The movable carriage 34 moves along the rail 31 when the slide bearing 33 engages with the rail 31. can do. Racks 35, 36 parallel to the rails 31 are mounted on the upper surface of the base 1 and the lower surface of the movable carriage 34, respectively, and a pinion 37 meshes with these racks 35, 36. And this pinion
When 37 is moved in the front-rear direction by a cylinder (not shown), the first conveying means 32 moves between the carcass band forming drum 5 and the first forming drum 19 while being guided by the rail 31. The racks 35 and 36, the pinion 37, and the cylinder described above constitute the drive mechanism 30 as a whole. Rails 38 parallel to the rails 31 are laid on the upper surface of the movable carriage 34, and a pair of gripping mechanisms 39 separated in the front-rear direction are supported on these rails 38. Each gripping mechanism 39 has a ring body 40 whose lower part is engaged with the rail 38, and the ring body 40 has a cam ring.
41 is rotatably supported. A plurality of slits 42 extending in the radial direction are formed in the ring body 40 at equal distances in the circumferential direction, and a plurality of inclined slits 43 are formed in the cam ring 41 at equal distances in the circumferential direction. Reference numeral 44 denotes a plurality of bushing segments supported by the ring body 40 so as to be movable in the radial direction.The bushing segments 44 are arranged at equal distances in the circumferential direction, and are inserted into the slits 42 and 43. (Not shown), respectively. As a result, when the cam ring 41 rotates,
The pusher segments 44 move in the radial direction in synchronization with each other, whereby the busher 45 including the plurality of busher segments 44 expands and contracts. A cylinder 46 is connected to each ring body 40, and a tip end of a piston rod 47 of the cylinder 46 is connected to the cam ring 41. As a result,
When the cylinder 46 operates, the cam ring 41 rotates while being supported by the ring body 40. Reference numeral 48 denotes a screw shaft extending parallel to the rail 38 and driven and rotated by a motor (not shown). The screw shaft 48 has a reverse screw formed at the center in the axial direction as a boundary. The front end of the screw shaft 48 is screwed into the gripping mechanism 39 located forward, and the rear end is screwed into the gripping mechanism 39 located rearward. As a result, when the screw shaft 48 rotates, a pair of The gripping mechanisms 39 move in the opposite directions by an equal distance from each other while being guided by the rails 38, and approach or separate from each other. Further, permanent magnets 49 for attracting and holding the beads B with the filler F are attached to the inner ends of the pusher segments 44 facing each other (see FIG. 6A).

Referring again to FIGS. 1 and 2, on the base 1 behind the first molding machine 16, a second molding machine 51 and a band molding machine 52 for performing the second molding of the two-stage molding are installed. The machine 51 and the band forming machine 52 have a common drive unit 53. The hollow shaft 54 of the band forming machine 52 extends forward from the driving unit 53, and the hollow shaft 54 is intermittently driven and rotated by the driving unit 53. A band forming drum 55 is provided at the tip of the hollow shaft 54 so as to be expandable / contractible coaxially with the first forming drum 19. One side of the band forming drum 55 is provided with a belt and a tread one after another. A supply service 56 is installed. These belts and treads are successively adhered around the band forming drum 55 to form a belt tread band D.

In addition, the second driving unit 53 is driven and rotated intermittently.
The main shaft 61 of the molding machine 51 also extends forward from the drive section 53 and penetrates the hollow shaft 54, and its tip projects forward from the band forming drum 55. A second molding drum 62, which is located immediately in front of the band molding drum 55 and coaxial with the band molding drum 55, is provided at the tip of the main shaft 61, and the second molding drum 62 is transferred from the first molding drum 19. The green case G can be deformed in a toroidal shape.

Reference numeral 66 denotes a second conveying means movable between the first forming drum 19 and the second forming drum 62. The second conveying means 66 separates the green case G formed on the first forming drum 19 from the second forming means. It is transferred to the forming drum 62 and transferred. The second conveying means 66 has a expandable and contractible drum-shaped holding holder 67 which is installed behind the first molding drum 19 and on one side thereof.
The holding holder 67 can temporarily hold the green case G from the inside. The holding holder 67 is supported by a horizontal swing arm 68 as shown in FIG. 4, and the swing arm 68 is fixed to a vertical support shaft 69 rotatably supported by the base 1. A sprocket 70 is fixed to the support shaft 69, and a chain is provided between the sprocket 70 and a sprocket 73 fixed to an output shaft 72 of a motor 71.
74 has been passed over. As a result, when the motor 71 operates, the holding holder 67 moves in the horizontal plane about the support shaft 69.
Turn 0 degrees. In FIGS. 1, 2, and 5, the first
A first transfer mechanism 78 is provided between the forming drum 19 and the holding holder 67.
The first transfer mechanism 78 has a side base 80 on one side of the base 1 on which a rail 79 parallel to the rail 31 is laid. Reference numeral 81 denotes a lower carriage slidably supported by a rail 79. The lower carriage 81 extends in a direction orthogonal to the rail 79 and is moved along the rail 79 by a drive mechanism similar to the drive mechanism 30. . Lower trolley
A rail 82 orthogonal to the rail 79 is laid on 81, and a slide bearing 84 attached to one side of an upper carriage 83 is slidably engaged with the rail 82. The upper carriage 83 is moved along the rails 82 by a drive mechanism similar to the drive mechanism 30. A ring body 85 is fixed to the other side of the upper carriage 83, and a plurality of radially movable gripping segments 86 are provided on the ring body 85 at equal distances in the circumferential direction. And these gripping segments
86 grasps the green case G from the outside on its inner circumference,
The cam ring 41 and the cylinder 46 are moved synchronously in the radial direction by the same driving mechanism as the cylinder 46. Side base mentioned above
80, the lower dolly 81, the upper dolly 83, the ring body 85, and the gripping segment 86 constitute the above-described first transfer mechanism 78 as a whole,
The first transfer mechanism 78 moves in a horizontal plane while holding the green case G received from the first forming drum 19 from the outside, and transfers the green case G to the holding holder 67.
A rail is provided on the base 1 between the driving unit 17 and the driving unit 53.
Rails 91 parallel to 31 are laid, and a second transfer mechanism 92 is slidably supported on these rails 91. This second
The transfer mechanism 92 has the same configuration as the gripping mechanism 39.
The second transfer mechanism 92 is moved along the rail 91 between the holding holder 67 and the second forming drum 62 by a drive mechanism similar to the drive mechanism 30. The second transfer mechanism 92 moves in a horizontal plane while holding the green case G received from the holding holder 67 from outside, and
Transfer to 62.

Reference numeral 96 denotes a third transfer means slidably supported by the rail 91. The third transfer means 96 is moved along the rail 91 by a drive mechanism similar to the drive mechanism 30, and
It is also possible to move between the forming drum 62 and the band forming drum 55, in this embodiment, between the second forming drum 62 and the first forming machine 16. The third conveying means 96 moves in a horizontal plane while holding the band D received from the band forming drum 55 from the outside, and transfers the band D to the second forming drum 62.
The green case G is transferred to the outer side in the radial direction of the upper green case G.

 Next, the operation of the embodiment of the present invention will be described.

First, the inner liner 7 and the carcass 8 are successively supplied from the servicer 6 to the rotating carcass band forming drum 5 and attached to the outer periphery thereof as shown in FIG. 6 (a) to form a cylindrical carcass band K. . At this time, a pair of beads B with filler F is supplied to the gripping mechanism 39 from a bead supply means (not shown), and the permanent magnets 49 of each gripping mechanism 39 are supplied.
The bead B with the filler F is held by suction. When the carcass band K is formed as described above, the cylinder is actuated to move the pinion 37 so as to approach the carcass band forming drum 5, and the gripping mechanism 39 of the first conveying means 32 moves the outer periphery of the carcass band K. Move it forward to the surrounding position. As a result, the bead B held by each gripping mechanism 39 is transported to a predetermined position radially outside the carcass band K. Next, the diameter of the carcass band forming drum 5 is expanded together with the carcass band K, and the inner peripheries of the pair of beads B are pressed against the outer perimeter of the carcass band K. As a result, the bead B with the filler F is set at a predetermined position on the outer circumference of the carcass band K, as shown in FIG. 6 (b), and the carcass band K and the bead B are integrated. Next, when the diameter of the carcass band forming drum 5 is reduced and the carcass band forming drum 5 is separated from the carcass band K, the integrated carcass band K and the bead B with the filler F are removed as shown in FIG. 6 (c). 1 is received by the transport means 32.

Next, the cylinder is operated to move the pinion 37 to the first molding machine 16
When the carcass band K and the bead B with the filler F are integrated with the carcass band K and the bead B, the first transporting means 32 is guided by the rail 31 and moves rearward while holding the carcass band K and the bead B from the outside. In FIG. 6 (d)
As shown in FIG. 5, the first molding drum 19 is conveyed to the outside in the radial direction. Next, the respective arcuate segments 26 of the first forming drum 19 are synchronously moved slightly outward in the radial direction and the integrated carcass band K and the bead B with the filler F are transferred to the first forming drum 19. Thus, the carcass band K
Since the carcass band K and the bead B with the filler F are pressure-bonded and integrated immediately after molding, even if the carcass band K and the bead B are delivered or conveyed after this integration, the relative positions of both For example, the position in the axial direction, the concentricity, and the like do not go out of order. Further, at this time, the bead lock bodies 29 synchronously move outward in the radial direction, and the filler F
The outer periphery of the bead lock body 29 is pressed against the inner periphery of the bead B via the carcass band K. Thereby, the filler F
The bead B is gripped from the inside by the bead lock body 29 and is strongly positioned and fixed at the position. Next, when the piston ring 47 of the cylinder 46 projects and the cam ring 41 rotates, the pusher segments 44 move radially outward in synchronization with each other, and the bead B is released from the attraction and holding of the permanent magnet 49.

Next, the arc-shaped segment 26 of the first forming drum 19 moves outward in the radial direction synchronously, and the central portion of the carcass band K is expanded. At this time, since the bead lock bodies 29 move so as to approach each other in the axial direction, the carcass band K between the part in contact with the bead B and the part in contact with the shoulder of the arc-shaped segment 26 is shown in FIG. As shown in (e), it is folded inward in the radial direction while a constant tension is applied.
Next, compressed air is supplied into each bladder 28, and each bladder 28
Expands. As a result, the folded portion 99 of the carcass band K located outside the bead B in the axial direction is pushed and expanded in a substantially frustoconical shape. In this state, the screw shaft 48 rotates and the holding mechanism
When 39 are moved so as to approach each other while being guided by the rail 38, the bladders 28 sandwiched between the pusher segment 44 and the arc-shaped segment 26 approach each other while rolling and deforming, and both ends of the carcass band K in the axial direction, That is, the folded part
Fold 99 around bead B as shown in FIG. 6 (f).
While expanding the bladder 28 in this way,
The folding portion 99 of the carcass band K is folded back by deforming the pusher segment 44 of the transporting means 32. The pusher segment 44 of the first transporting means 32 that has transported the carcass band K is folded back to the folding portion 99 of the carcass band K. Since it is used, the position of the first transfer means 32 at the end of the transfer can be used as it is as the start position of the return operation, whereby the transfer operation and the return operation can be performed continuously without loss time. Efficiency is improved.
Moreover, since the first transporting means 32 is used for transporting the carcass band K and folding back the carcass band K, no special turn-up device is required, and the structure of the entire device is simplified and downsized. You can also At this time, the bead B is a bead lock body of the first forming drum 19.
Since it is gripped from the inside by 29 and positioned and fixed, it does not move even if it receives a large external force from the bladder 28 or the like when folded back. Carcass band K
And bead B are integrated and then delivered and transported,
Further, since the bead B is positioned and fixed before being folded back, the relative position between the carcass band K and the bead B, for example, the axial position, the concentricity, and the like are prevented from deviating, resulting in a product tire. The uniformity at that time becomes good. Next, the bladder 28 is contracted, the first conveying means 32 is moved to the standby position between the carcass band molding machine 2 and the first molding machine 16, and the pusher segment 44 of the first conveying means 32 is initialized. Return to position. Next, a side tread is attached from the servicer 20 to the rotating first molding drum 19.
The green case G is formed by supplying 21 to the periphery of the carcass band K on the first forming drum 19. here,
As described above, the carcass band K is molded on the carcass band molding drum 5 and the beads B with the filler F are set, while the folding of the carcass band K and the attachment of the side tread 21 are performed on the first molding drum 19. As a result, the number of operations on the first molding drum 19 is reduced by the bead set and the cycle time is shortened as compared with the conventional one. The cycle time of the carcass band forming drum 5 and the cycle time of the first forming drum 19 are almost equal to each other. Here, since the operations of the carcass band forming drum 5 and the first forming drum 19 are continuous, the longer cycle time becomes the unified cycle time at this stage. Since the cycle times 5 and 19 are made uniform as described above, the unified cycle time is shortened and work efficiency is improved.

Next, the upper carriage 83 is moved in the other direction along the rail 82 to a position where the ring body 85 is coaxial with the first forming drum 19. Next, move the lower carriage 81 backwards to the ring body 85.
Moves to a position surrounding the first forming drum 19. next,
The gripping segment 86 is synchronously moved inward in the radial direction,
The gripping segment 86 grips the green case G on the first molding drum 19 from the outside. Next, the first forming drum
The arc-shaped segment 26 of 19 and the bead lock body 29 are reduced in diameter to move the green case G from the first molding drum 19 to the first transfer mechanism 78.
After passing the ring body 85 forward in the horizontal plane,
It is then moved in one direction and then backwards. When the green case G is fitted to the outside of the holding holder 67 in this way, the diameter of the holding holder 67 is enlarged, and the green case G is held by the holding holder 67 from the inside. Next, when the gripping segment 86 moves radially outward and the green case G is transferred from the first transfer mechanism 78 to the holding holder 67,
The first transfer mechanism 78 returns to the initial position. Next, the motor 71
When the is operated, the holding holder 67 is rotated by 180 degrees in a horizontal plane about the support shaft 69, and is at a position where the green case G can be transferred to and from the second transfer mechanism 92, that is, the second transfer mechanism 92 Transfer to a coaxial position. At this time, the second transfer mechanism 92 and the third transfer means 96 are retracted rearward so as not to interfere with the holding holder 67. Since the green case G can be temporarily held by the holding holder 67 in this state or in the state of being received from the first transfer mechanism 78, the second molding drum 62 or the like is not damaged in a short time. If it happens, or first, second
Even when the cycle times of the forming drums 19, 62 and the like are slightly different from each other, the operation of another drum can be continued without any problem. Next, the second transfer mechanism 92 moves the holding holder 67.
After moving forward until it fits on the outside of the second transfer mechanism
92 receives the green case G from the holding holder 67. Next, the second transfer mechanism 92 moves backward in the horizontal plane and transfers the green case G to the second molding drum 62 while gripping the green case G from the outside. At this time, the third transfer means 96 transfers the second transfer drum 96. It is retracted between the second forming drum 62 and the band forming drum 55 to avoid interference with the mechanism 92. Next, the second
The transfer mechanism 92 transfers the green case G to the second molding drum 62.
On the other hand, the holding holder 67 turns by the operation of the motor 71 and returns to the initial position. Here, when the entire long transfer path from the first forming drum 19 to the second forming drum 62 is moved to one transfer as in the prior art, the transfer cycle time by this transfer is the carcass band forming drum 5, Although the cycle time of the molding operation of the first molding drum 19 and the second molding drum 62 becomes longer and the work efficiency decreases, in this embodiment, the transfer path is divided into approximately two equal parts to reduce the transfer cycle time. It is shortened to improve work efficiency. Moreover, if the transfer of the green case G is performed while raising and lowering as in the conventional case,
Although there is concern about safety and the amount of energy used is large, in this embodiment, since the green case G is transferred on a horizontal plane, safety is improved and energy can be saved. This is possible because the bead setting work is eliminated from the work on the first molding drum 19, and the bead setting device is removed from the periphery of the first molding drum 19 to allow a large space around the bead setting device. Further, when the band forming drum is arranged immediately before the second forming drum as in the conventional case, the distance between the first forming drum and the second forming drum becomes long, and the cycle time for transferring the green case becomes long. However, if the second forming drum 62 is arranged immediately before the band forming drum 55 as in this embodiment, the distance between the first forming drum 19 and the second forming drum 62 becomes shorter, and the transfer cycle time becomes shorter. Is shortened and work efficiency is improved. When the transfer of the green case G to the second forming drum 62 is completed, the second transfer mechanism 92 returns to the initial position.

On the other hand, a belt and a tread supplied in advance from the servicer 56 are pasted on the band forming drum 55 one after another to form a belt tread band D. Then, the band D is moved backward until the third transport means 96 is fitted to the band forming drum 55, and then delivered to the third transport means 96. Next, the third conveying means 96 moves forward until it fits outside the second forming drum 62, and conveys the band D to the outside of the green case G on the second forming drum 62 in the radial direction. Next, by expanding the second molding drum 62, the band D is attached to the outside of the green case G while deforming the green case G into a toroidal shape, and a green tire is molded. Next, the second forming drum 62 is contracted, and the third conveying means 96 is returned to the initial position. Next, the green tire is taken out of the second forming drum 62 by a loader (not shown) and transported to the next step.

Although the above description focuses on one tire and describes each operation, in this embodiment, the formation of the carcass band K in the carcass band forming drum 5 and the formation of the green case G in the first forming drum 19 are described. The forming, the temporary holding of the green case G in the holding holder 67, the forming of the band D in the band forming drum 55, and the forming of the green tire in the second forming drum 62 are performed at the same time. As a result, the green tire is produced with high efficiency. You can.

Effects of the Invention As described above, according to the present invention, the working efficiency can be improved while the structure is simple and small.

[Brief description of the drawings]

1 is an overall schematic plan view showing one embodiment of the present invention, FIG. 2 is an overall schematic front view, FIG. 3 is a sectional view taken along the line II of FIG. 1, and FIG. 5 is a sectional view taken along the line II-II of FIG. 1, and FIGS. 6 (a) to 6 (f) are explanatory views for explaining the operation. 5 …… Carcass band forming drum, 7 …… Inner liner 8 …… Carcass, 19 …… First forming drum 21 …… Side tread, 28 …… Folding bladder 32 …… First conveying means, 62 …… Second forming Drum 66 …… Second transport means 67 …… Holding holder 78 …… First transport mechanism, 92 …… Second transport mechanism 96 …… Third transport means, K …… Carcass band B …… Bead, G …… Green Case D …… Band

Continuation of front page (56) References JP-A-59-70547 (JP, A) JP-B-62-35381 (JP, B2)

Claims (4)

(57) [Claims] 1. A step of forming an inner liner and a carcass around a carcass band forming drum one after another to form a carcass band, and a step of carrying a bead to a predetermined position outside the carcass band by a first carrying means and crimping the beads. When,
A step of transferring and transferring the integrated bead and the carcass band from the carcass band forming drum to the first forming drum by the first transfer means, and a step of holding and positioning and fixing the bead from the inside by the first forming drum; A process of deforming the folding bladder of the first forming drum by the first conveying means while expanding the folding bladder and folding back both ends of the carcass band in the axial direction around the bead, and attaching side treads around the carcass band to form a green case. Process and the second
A step of transporting and transferring the green case from the first molding drum to the second molding drum by the transporting means, and a band formed by sticking a belt and a tread around the band molding drum one after another by the third transporting means. A step of conveying the green case from the forming drum to the outside of the green case on the second forming drum; and a step of deforming the green case into a toroidal shape by the second forming drum while holding the outside of the green case by the third conveying means. Bonding the green tire to a band. 2. A carcass band forming drum for forming a carcass band by successively sticking an inner runner and a carcass around it, and a bead which is arranged behind the carcass band forming drum in a coaxial relationship with the carcass band forming drum. , From the inside, is positioned and fixed, and a first forming drum for forming a green case by sticking a side tread around the carcass band, and movable between the carcass band forming drum and the first forming drum. Conveying the bead to the predetermined position outside the carcass band and press-fitting, the bead integrated by the pressing, the carcass band is conveyed from the carcass band forming drum to the first forming drum and transferred, and
A first transporting means for folding back both ends of the carcass band in the axial direction around the bead by deforming the expanding folded bladder of the first forming drum, and a green case arranged in a toroidal shape installed behind the first forming drum. The green case can be moved between the first forming drum and the second forming drum, and can be moved between the first forming drum and the second forming drum.
A second conveying means for conveying to a forming drum and transferring the first drum;
The band forming drum is installed behind the forming drum, and a belt and a tread are successively attached around the forming drum to form a band, and the band forming drum is movable between the band forming drum and the second forming drum. And a third conveying means for forming a green tire by transporting the green tire to the outside of the green case on the second forming drum and attaching the green tire to the outside of the green case deformed into a toroidal shape. 3. The second conveying means is installed at the rear of the first forming drum and on one side of the first forming drum so that the green case can be temporarily held from the inside and can be swung in a horizontal plane. A holder, a first transfer mechanism movable in a horizontal plane between the first forming drum and the holding holder, and transferring the green case received from the first forming drum to the holding holder while holding the green case from the outside; A second transfer mechanism that is movable in the horizontal plane between the second forming drum and receives the green case from the holding holder that has rotated after receiving the green case and transfers the green case to the second forming drum while gripping it from the outside. The tire building apparatus according to claim 2, further comprising: 4. The tire forming apparatus according to claim 2, wherein the second forming drum is disposed immediately before the band forming drum and coaxially with the band forming drum.