JPS6233941B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a green tire molding apparatus, and more particularly to a green tire molding apparatus used when molding a radial green tire by a two-step molding method.

Conventionally, there are a one-step molding method and a two-step molding method as methods for molding green radial tires. To give a very simple explanation of each forming method, the one-step forming method is a method in which a green tire is formed on one green tire forming drum, and the two-step forming method is a method in which a green tire is formed on a single green tire forming drum. After wrapping the ply cord around the forming drum of the machine and assembling a pair of beads, the ply cord is folded around the bead and a pair of sidewall materials are attached to form a cylindrical first-stage green tire. The first stage green tire is transferred onto the forming drum of the second stage green tire forming machine, and the cylindrical first stage green tire is deformed into a toroidal shape on the second stage green tire forming drum, and the outer periphery is In this method, a green tire is formed by gluing a belt/tread assembly to a tire.

However, in the above-mentioned two-stage molding method, the second stage green tire molding capacity is 1.5 to 2 times higher than the first stage green tire molding capacity, so the difference between the first stage molding and the second stage molding is , it is necessary to store the first stage green tires, which requires various management, and also the removal of the first stage green tires from the first stage green tire forming drum and the insertion into the second stage green tire forming drum. This caused problems in terms of quality and productivity.

On the other hand, the one-stage molding method does not have the above-mentioned problems, but since the molding is performed on one molding drum, the molding cycle becomes longer and there is a problem in terms of equipment operation rate.

The object of the present invention is to provide an excellent green tire forming apparatus that uses a two-step forming method, but can solve the above-mentioned problems, and can also reduce interference with pillars, etc. when installing this apparatus. It is not intended to be provided.

Hereinafter, the present invention will be explained in detail by way of examples with reference to the drawings.

1 is a plan view of a green tire forming apparatus according to an embodiment of the present invention, FIG. 2 is a view taken from FIG. 1 in the direction of the arrows, and FIG. 3 is a partially removed view taken in the direction of the arrows in FIG.

In the figure, E denotes a green tire forming apparatus according to an embodiment of the present invention, in which a ply-down folding mechanism is provided on both sides of a first-stage green tire forming drum 201 (hereinafter referred to as the first-stage forming drum) which is radially expandable and rotatable. A first stage green tire forming apparatus 200 (hereinafter referred to as the first stage forming apparatus) is equipped with a head stock 203 and a tail stock 204, each having a head stock 203 and a tail stock 204, and a second green tire forming apparatus 200 (hereinafter referred to as the first stage forming apparatus) which is expandable and contractible in the radial direction and is rotatable.
A radially expandable and rotatable belt/tread assembly forming drum 304 (hereinafter referred to as assembly forming drum) is movably provided on the head stock 303 side of the staged green tire forming drum 302 (hereinafter referred to as second stage forming drum). Two-stage green tire forming device 300
(hereinafter referred to as a second stage molding device) are arranged coaxially so that the first stage molding drum 201 and the second stage molding drum 302 face each other at intervals, and each of the molding drums 201 and 302 A first-stage green tire transfer device 400 (hereinafter referred to as the first transfer device) equipped with a first-stage green tire gripping mechanism 401 in between.
is movably disposed, and a belt/tread assembly gripping mechanism (not shown) is provided between the second stage forming drum 302 and the assembly forming drum 304.
Belt tread assembly transfer device 500 having
(assembly transfer device) is disposed movably and further positioned on the axis Y-Y having a desired angle in plan view with respect to the axis X-X of the first stage molding device 200, so that it can be expanded and contracted in the radial direction. A band forming device 100 equipped with a rotatable band forming drum 101 is disposed, and a band transfer device 600 equipped with a rotatable band gripping mechanism 602 is disposed on the axis Y-Y.

To explain the structure of the tire forming apparatus described above in more detail, the band forming apparatus 100 includes a base 1
It has a main shaft 104 that is rotatably supported by a frame 103 fixed to 02. A belt pulley 105 is fixed to the rear of this main shaft 104,
Belt pulley 10 fixed to the output shaft of the main shaft rotation motor 106 fixed to the frame 103
7 via a belt 108. A band forming drum expansion/contraction mechanism consisting of a fluid cylinder 109, a stopper 110 for adjusting the stroke of the cylinder piston, a rotary joint 111 for supplying fluid into the cylinder, etc. is integrally engaged with the belt pulley 105. . A rotatable band forming drum 101 whose diameter can be freely expanded and contracted is detachably attached to a flange 112 at the end of the main shaft 104 . A stitching device 113 of known means is disposed below the band forming drum 101. A band forming servicer 700 installed at the rear of the band forming apparatus 100 is equipped with automatic feeding devices for an inner liner in a lower stage, a carcass in a middle stage, and a finishing machine in an upper stage. 701 is an inner liner unwinding device, 702 is an inner liner unwinding drive device, and the inner liner is appropriately unwound by known means, and winding of the inner liner around the band forming drum 101 is performed using a special method developed by the present applicant. This is automatically carried out using the apparatus described in Japanese Patent No. 55-173770. The carcass supply device is a known means and detailed explanation will be omitted, but
3 is a carcass ply unwinding device; 704 is a carcass ply unwinding device; unwinding is performed by the same means as for the inner liner;
05, When the carcass ply is transferred to the front conveyor 706 and the tip of the carcass ply is detected by the detection device 707, the conveyor stops moving and the carcass ply is transferred to the rear conveyor 70.
5 and the front conveyor 706 is actuated to perform cutting. Thereafter, the front conveyor 706 moves forward, its front end comes into pressure contact with the band forming drum 101 as appropriate, rotates in synchronization with the rotation of the band forming drum 101, and transfers the carcass ply cut into the predetermined length to the band forming drum. Wrap it around 101. Finishing unwinding device 70
The finishing material hung on the unwinding motor 7
10 and supplied to a pair of finishing winding and cutting mechanisms 711, 711'. This winding and cutting mechanism was developed in a patent application filed in 1983 by the applicant.
In the apparatus described in Japanese Patent Application No. 181371, winding and cutting of the finishing onto the band forming drum 101 are performed automatically.

Band transfer device 600 has a pivot arm 601 rotatably attached to a pin 605 fixed to a bracket 604 fixed to a post 603. A pin 606 is rotatably attached to the front end of the arm 601, and a sprocket 607 is fixed to the upper end of the pin 606.
7 and sprocket 608 fixed to pin 605
and are connected by a sprocket chain 609. Bracket 61 fixed to column 603
A fluid cylinder 611 is swingably attached to the rotary arm 601, and a rod 612 of the cylinder 611 is swingably attached to a bracket 613 fixed to the swing arm 601. Flange 6 of pin 606
A frame 615 is fixed to 14, two guide rods 616 are attached to this frame 615, and the support frame 6 of the band gripping mechanism 602
Slide bearing 618 attached to the top of 17
and are slidably fitted. Also frame 61
A fluid cylinder 619 is fixed to the rod 5, and the rod end of the fluid cylinder 619 is connected to the support frame 617.
is connected to the upper end of the Band gripping mechanism 60
2 is a plate 620 fixed to a support frame 617 and having radially formed guide grooves, and a plurality of slide members 621 that slide while being guided by the guide grooves.
and a plurality of gripping arms 622 fixed to each slide member 621 and each having a band gripping member such as a buckle cup. The number of teeth Nα of sprocket 607 and the number Nβ of teeth of sprocket 608 are selected according to the following relational expression.

Nα: Nβ = Rotating angle of arm α: Rotating angle β of band gripping mechanism (=180 + θ) Because of this configuration, the band gripping mechanism 602 can be set at a position that coincides with the axis Y-Y of the band forming machine. When the fluid cylinder 619 is operated forward, the band gripping mechanism 602 is guided by the guide rod 616 and moves forward, surrounding the band forming drum 101 at the position shown by the two-dot chain line. Next, the band gripping arm 622 approaches the band forming drum 101, grips the carcass band on the band forming drum 101, and when the diameter of the band forming drum 101 is reduced, the carcass band is replaced by the band gripping mechanism 602. Next, when the fluid cylinder 619 is operated backward, the band gripping mechanism 602 is guided by the guide rod 616 and returns to the position shown by the solid line in the same manner as described above. When the fluid cylinder 611 is operated forward in this state, the pivot arm 601 pivots around the pin 605, and at the same time engages with this pivot to rotate the sprocket 60.
7 and pin 606 rotate, and the band gripping mechanism 602 supported via the frame 615, guide rod 616, slide bearing 618, and support frame 617 pivots to a position that coincides with the axis XX of the first stage molding machine. . When the fluid cylinder 619 is operated forward in this state, the band gripping mechanism 60
2 moves forward guided by the guide rod 616, transfers the carcass band to a position surrounding the first stage forming drum with a reduced diameter, releases the band grip, and
The carcass band is replaced on the stage forming drum 201. After this, when the fluid cylinder 619 is operated backward, the band gripping mechanism 602 is moved backward, and when the fluid cylinder 611 is subsequently operated backward, the swing arm 601 pivots around the pin 605 as described above, and at the same time, the swing arm 601 is engaged in this swing. sprocket 60
7 and the pin 606 rotate, and the band gripping mechanism 60
2 rotates and returns to a position that coincides with the axis Y-Y of the band forming machine, and waits.

The first stage molding device 200 has a main shaft 206 rotatably supported by a frame 207 fixed to a base 205. A belt pulley 208 is fixed to the rear of this main shaft 206, and the frame 2
Main shaft rotation motor 209 attached to 07
It is connected via a belt 211 to a belt pulley 210 fixed to the output shaft of the motor. The belt pulley 208 includes a fluid cylinder 212, a stopper 213 for adjusting the stroke of the cylinder piston, and a rotary joint 2 for supplying fluid into the cylinder.
A first stage forming drum expansion/contraction mechanism consisting of 14, etc. is integrally engaged therewith. A flange 215 at the end of the main shaft 206 has a first rotatable shaft that can be freely expanded and contracted in diameter.
A step-forming drum 201 is removably attached. The tail stock 20 is located opposite the head stock 203 around the first stage forming drum 201.
4 are installed. Tail stock frame 2
The sixteen support shafts 217 are rotatably supported by bearings 218, 218' fixed on the bed 205. Bracket 21 fixed on bed 205
The cylinder rod 221 of the fluid cylinder 220, which is swingably attached to the headstock frame 216, is attached to the bracket 2 fixed to the headstock frame 216.
22 so that it can swing freely. Further, a tail stock shaft 223 is attached to the tail stock frame 216 so as to be slidable in the axial direction. Reference numerals 202a and 202b are known ply-down folding mechanisms similar to those described in Japanese Patent Publication No. 53-25872, which perform bead driving, finger ply-down, and terminal folding of carcass plies, and the mechanism 202a and 202b are similar to those described in Japanese Patent Publication No. 53-25872. They can slide and approach and separate from each other with respect to the forming drum 201. Tail stock frame 2
16 is the support shaft 2 due to the operation of the fluid cylinder 220.
17, and swings backward from the position shown by the solid line to the position shown by the two-dot chain line in FIG. It is configured.

Reference numeral 800 denotes a first-stage molding servicer, which is a device for supplying sidewall components, and is equipped with a pair of automatic feeding devices each for sidewall material in the lower stage and rim compression in the upper stage. This device has the same mechanism as the finishing automatic supply device of the band forming servicer 700, and the explanation thereof will be omitted.

Reference numeral 300 denotes a second stage forming device, and a pair of bead holding members 3 of a second stage forming drum 302 whose diameter can be expanded or contracted freely.
01a and 301b at the front end thereof, and is rotatably supported by a head stock 303.
5 and an outer shaft 306. The inner shaft 305 and the outer shaft 306 are slid in opposite directions in the axial direction by a main shaft opening/closing drive mechanism 307, and a pair of bead holding members 301a,
301b are synchronously slid in opposite directions in the axial direction. The cylindrical member 3 is attached to the front of the head stock 303.
08 is attached to support the outer shaft 306 in a slidable and rotatable manner. Furthermore, an assembly forming drum 304 is rotatably and slidably mounted on this cylindrical member 308, and is slid between an forward position K and a retracted position L by the operation of a cylinder 309 fixed to the head stock 303. and a rotary drive motor 3 fixed to the headstock 303.
10 rotations are transmitted through means such as a spline shaft 311, a spline bearing (not shown), and appropriate belt pulleys and belts, so that the assembly forming drum can be freely rotated in the forward position K and the backward position L. .

The belt servicer device 900 includes a first belt servicer unit 902a and a second belt servicer 902b fixed on a base 901 fixed on the floor.
a and 902b are attached to correspond to the forward position K and the backward position L of the assembly forming drum 304, respectively. Furthermore, each servicer unit is a known device equipped with automatic cutting mechanisms 903a and 903b that automatically measure the length of the belt before wrapping it around the assembly forming drum 304 and automatically cut the belt.

1000 is a tread feeding device, conveyor 10
A pair of guide members 100 that slidably supported 01.
2,1002' Support shaft 100 fixed to the rear end
3,1003' are swingably supported by bearings 1005, 1005' fixed on the base 1004, and brackets 1006, 1006' fixed to the front ends of the guide members 1002, 1002' are attached to the base 1004. fluid cylinder 10
07,1007' cylinder rod is fixed. Furthermore, the fluid cylinder 1008 is connected to the bracket 1.
009 on the base 104, and its cylinder rod is fixed on the lower frame of the conveyor 1001.

Since it is configured like this, the conveyor 100
1 moves forward when the cylinder 1008 is moved forward, guided by the guide members 1002 and 1002',
The assembly is advanced to the position indicated by the two-dot chain line at the bottom of the forming drum 304. In this state, the fluid cylinder 100
7,1007' is moved forward, the guide member 1
002, 1002' swings upward around support shafts 1003, 1003', and guide members 1002, 100
The conveyor 1001 supported at 2' also swings upward, and the treads loaded on the conveyor 1001 are pressed against the lower surface of the assembly forming drum 304. Peripheral speed of assembly forming drum 304 and conveyor 1
When the surface peripheral speeds of the treads on the treads 001 are made the same and the treads are rotated synchronously, the treads are wound around the outer peripheral surface of the assembly forming drum without deformation such as elongation. Next, when the fluid cylinders 1007 and 1007' are operated backward, the conveyor 1001 is lowered and separated from the assembly forming drum 304, and then the fluid cylinder 1007 is moved backward.
When the conveyor 8 is operated backward, the conveyor 1001 is guided by the guide members 1002, 1002' and retreats from the position shown by the two-dot chain line to the position shown by the solid line. First stage molding device 200 and second stage molding device 300
Rails 402, 40 parallel to the axis X-X between
2' is provided. This rail 402, 40
2' is mounted on a pedestal 404 fixed on a base 403 fixed on the floor.

The first stage green tire transfer device 400 has sliding bearings 405, 40 on guide rails 402, 402'.
5′ and is slidably mounted on the base 403.
A slide motor 406 fixed above, a sprocket 409 fixed to the output shaft of a reducer 408 connected by a coupling 407, and a base 4
A sprocket chain whose both ends are latched to the pedestal 410 of the transfer device 400 is hooked to the driven side sprocket 409' which is rotatably attached to the second stage molding device 300 side of 03.

With this configuration, the first stage forming drum 201 is driven by the slide motor 406.
It can be freely moved between position H of , and position J of second stage forming drum 302 while being guided by rails 402 and 402'. Further, this first stage green tire transfer device 400 has an opening in a part of the support frame 411 of the first stage green tire gripping mechanism 401, and
Avoiding mechanical interference with the stitcher device 224 of the step forming device 200, the first step forming drum 201
The structure is such that it can move to the first stage forming drum position H and stand by during the stitching operation of the tire component wound on it.

The belt tread assembly transfer device 500 has slide bearings 501, 5 on the rails 402, 402'.
01' so as to be slidable. An end portion 5 of a pedestal 503 with slide bearings 501, 501' fixed to the lower surface and a frame 502 fixed to the upper surface.
04, the cylinder rod 50 of the fluid cylinder 505
6 tips are attached. fluid cylinder 5
05 is a bracket 5 fixed on the base 403
It is fixed at 07. When the fluid cylinder 505 is actuated forward, the belt/tread assembly transfer device 500 moves forward guided by the rails 402, 402' and moves to the second stage forming drum position J shown by the two-dot chain line. Conversely, when the fluid cylinder 505 is operated backward, the assembly forming drum 304 returns from the second stage forming drum position J to the forward position K.

Next, the process of molding a green tire using the above-mentioned molding apparatus will be explained.

(1) Band forming process The finishing supplied from the finishing unwinding device 709 to the pair of finishing winding/cutting mechanisms 711, 711' is automatically wound onto the band forming drum 101 whose diameter has been expanded.
The inner liner that has been cut and then unwound from the inner liner unwinding device 701 is automatically wound and cut, and further a carcass ply that has been previously cut to a predetermined length is wound around it. Thereafter, the stitching device 113 rotates the band forming drum 101 and presses the band forming drum 101 to remove air between the laminated and wound components and bring them into close contact, thereby forming a carcass band.

Next, the band gripping mechanism 602, which is waiting at a position that coincides with the axis Y-Y of the band forming device, advances to a position where it surrounds the band forming drum 101 by the forward movement of the fluid cylinder 619, and the carcass band on the band forming drum 101 is moved forward by the forward movement of the fluid cylinder 619. Thereafter, the gripping mechanism 602 that grips the carcass band moves back and waits due to the backward operation of the fluid cylinder 619.

(2) First stage molding process Tail stock 2 of the first stage molding device 200
04 by retracting the fluid cylinder 220,
When the fluid cylinder 611 of the band transfer device 600 is actuated forward while the band is retracted to the position shown by the two-dot chain line, the band gripping mechanism 602 rotates forward and moves to a position that coincides with the axis of the first stage forming drum. Next, the band gripping mechanism 602 moves the first
The stage is advanced to a position surrounding the forming drum 201 and the carcass band is fed onto the forming drum 201.

After that, the fluid cylinder 619 is operated backward to move the band gripping mechanism 602 backward, and then the fluid cylinder 611 is operated backward, and the band gripping mechanism 602 is moved backward.
Return 02 to the standby position.

Forming drum 20 supplied with carcass band
1, the fluid cylinder 220 is moved forward at the same time, the tail stock 204 is advanced, the axes of the tail stock shaft 223 and the main shaft 206 are aligned, and the tail stock shaft is further moved toward the forming drum 201. The ply down folding mechanisms 202a and 202b are brought close to the forming drum 201, and bead beating, finger ply down, and terminal folding of the carcass ply are performed. Next, the first stage molding servicer 8
A pair of rim cushions and a pair of sidewall materials are supplied from 00, wound on the first stage forming drum 201, and cut. During this time, the tail stock 204 returns to the position shown by the two-dot chain line due to the backward movement of the fluid cylinder 220.

When the winding of the rim cushion and sidewall material is completed, stitching is performed by the stitcher device 224, and at the same time, the first stage green tire transfer device 400 moves from the standby position I to the first stage forming drum position H, and the first stage green tire transfer device 400 moves from the standby position I to the first stage forming drum position H. It surrounds 201 and stops. When the stitching is completed and the first stage green tire forming is completed,
The green tire gripping mechanism 401 grips the first stage green tire, reduces the diameter of the forming drum 201, and
The staged green tire is replaced by the transfer device 400.
Thereafter, the first stage green tire transfer device 400 is moved to the standby position I and is kept on standby.

(3) Second stage forming process The first belt, which has been cut to a predetermined length in advance by the first belt servicer 902a, is wrapped around the outer peripheral surface of the assembly forming drum 304, which has been moved to the assembly forming drum forward position K and stopped. , join both ends. During this time, the second stage forming drum 30
On the second side, the belt/tread assembly is inserted into the second stage forming drum 302, held by the bead holding members 301a, 301b, and deformed into a toroidal shape.
The operation of displacement from the tread transfer device 500 takes place in parallel.

Next, the assembly forming drum 304 is moved to the retracted position L.
Almost synchronously, the belt/tread assembly transfer device 500 also moves from the second-stage forming drum position J to the assembly forming drum advance position K and stops, and waits.

Next, the second belt is laminated onto the first belt wound on the assembly forming drum 304, and a second belt cut into a predetermined length by the second belt servicer 902b is wound thereon, and both ends are joined. Next, the conveyor 1001 loaded with the treads of the tread feeder 1000 is moved forward, and then swung upward to bring the treads on the conveyor 1001 into pressure contact with the lower outer circumferential surface of the assembly forming drum 304. The drum 304 is rotated synchronously to wrap the tread, join both ends, and attach the belt.
Complete molding of the tread assembly. Thereafter, the assembly forming drum 304 moves from the retracted position L to the forward position K, and is surrounded by the belt/tread assembly transfer device 500 waiting at this position. Subsequently, the belt tread assembly is gripped by the belt tread assembly gripping mechanism, the diameter of the assembly forming drum 304 is reduced, and the belt tread assembly is replaced by the belt tread assembly transfer device 500.

During this time, on the second stage forming drum side, the belt/tread assembly replaced on the toroidal green tire is compressed using a stitching device using known means, and the green tire forming is completed.
This completed green tire is transferred to a second stage forming drum 30.
Remove from 2. Next, the first stage green tire transfer device 400 is moved from the standby position I to the second stage forming drum position J to surround the forming drum 302, and the pair of bead holding members 301a, 30
1b and the pair of bead positions of the first-stage raw tire are made to coincide with each other, and the movement is stopped. In this state, bead holding members 301a, 301
The gripping mechanism 4 of the first stage green tire transfer device 400 expands the diameter of b and grips the first stage green tire.
01 is released, and the second stage forming drum 3 is released.
Replace it with 02.

Next, the first stage green tire transfer device 400 moves back to the standby position I and waits. Almost in synchronization with this movement, the belt/tread assembly transfer device 500, which is holding the belt/tread assembly and is on standby, moves to the assembly forming drum advance position K.
to the second stage forming drum position J.
Furthermore, in parallel with the above-mentioned moving operation, bead holding members 301a and 30 are moved on the second stage forming drum side.
1b are brought close to each other to deform the first stage green tire into a toroidal shape.

Since the present invention is configured as described above, it has the following effects. In other words, (a) As a result of being able to divide the green tire forming process into a band forming process, a first stage green tire forming process, and a second stage green tire forming process, the time required for each process can be approximately averaged, and the time required for each process can be approximately averaged. The actual molding cycle can be shortened. Additionally, the space allows for the installation of a highly automated servicer, and the assembly of tire components can be automated.
Furthermore, because an automated transfer device is installed between each molding device, manual work can be minimized, allowing high-quality green tires to be molded without being affected by the skill level of the workers. Since the entire molding process can be carried out by only one worker, it is possible to significantly improve human productivity.

(b) Since the arrangement angle of the band forming device with respect to the axis of the first stage green tire forming device can be freely selected, it is possible to avoid interference with pillars that occur when placing it in a building, reducing restrictions on placement. can.

Therefore, the present invention provides an excellent green tire forming apparatus which uses a two-step forming method, but which can solve the above-mentioned problems and also alleviate interference with pillars, etc. when installing this apparatus. can be provided.

[Brief explanation of the drawing]

1 is a plan view of a green tire forming apparatus according to an embodiment of the present invention, FIG. 2 is a view taken from FIG. 1 in the direction of the arrows, and FIG. 3 is a partially removed view taken in the direction of the arrows in FIG. 100... Band forming device, 101... Band forming drum, 200... First stage green tire forming device, 201... First stage green tire forming drum, 2
02a, 202b...Ply down folding mechanism,
203... Head stock, 204... Tail stock, 300... Second stage green tire forming device,
302...Second stage green tire forming drum, 303
...Head stock, 304... Belt/tread assembly forming drum, 400... First stage green tire transfer device, 401... First stage green tire gripping mechanism, 500... Belt/tread assembly transfer device, 600... ... Band transfer device, 602 ... Band gripping mechanism.

Claims (1)

[Claims] 1. A first stage green tire forming drum that is radially expandable and rotatable, and has a head stock equipped with a ply-down folding mechanism on both sides, and a tail stock configured to be retractable to a position that does not interfere with the band gripping mechanism. A second stage green tire forming device comprising a staged green tire forming device and a radially expandable and rotatable belt/tread assembly forming drum on the headstock side of the radially expandable and rotatable second stage green tire forming drum. Tire molding equipment,
The first stage green tire forming drum and the second stage green tire forming drum are arranged to face each other at intervals, and the first stage green tire forming drum is placed between each of the forming drums.
A first stage green tire transfer device equipped with a staged green tire gripping mechanism is movably arranged, and the second stage green tire transfer device is movably arranged.
A belt/tread assembly transfer device having a belt/tread assembly gripping mechanism is movably disposed between the stage green tire forming drum and the belt/tread assembly forming drum, and further, A band forming device equipped with a band forming drum that is expandable and contractible in the radial direction and rotatable is disposed on an axis having a desired angle in plan view with respect to the axis of the device, and the first stage green tire forming device and the band forming device, a band transfer device having a rotatable band gripping mechanism is disposed, and the band gripping mechanism is arranged such that the axis of the first stage green tire forming device and the axis of the band gripping mechanism are aligned with each other. A green tire forming device characterized in that it is configured to be able to rotate and move to match.