JPS5850193B2 - Green case manufacturing equipment for radial tires - Google Patents

Description

[Detailed description of the invention] The present invention relates to improvements in radial tire manufacturing equipment.

In general, a product tire must not only have its outer shape and dimensions, but also the distribution of the force acting on the internal cord, which is mechanically symmetrical with respect to the center cross section of the tire and uniform in the circumferential direction. This is important for the quality of the vehicle, and if these balances are disrupted, vibrations may occur during driving and maneuverability may deteriorate, which is dangerous.

Particularly in radial tires, the breaker layer is an important strength member, but since the cords inside it do not reach the bead, the curved carcass layer is prone to displacement during the process of assembling the breaker layer. It is extremely important to ensure that the code angles are not distorted.

Conventionally, when assembling the breaker ply, a method was used in which the breaker ply was wrapped around the outer circumference of the curved carcass layer, and then the breaker ply was pressed with a pressure roller, or the breaker ply was not wrapped in this method. In order to improve accuracy and productivity, the breaker ply is not wrapped on the curved carcass layer, but the breaker ply is pre-wound on a forming drum exclusively for the breaker, which is directly connected to the curved carcass layer. A cylindrical body is prepared in advance, and the carcass layer is placed in the center of the curved carcass layer.The carcass layer is then curved and the above-mentioned breaker layer is assembled.Then, a conventionally known step is inserted from the outside of the breaker layer. A method called charol is used in some industries to crimp multiple breaker plies and carcass plies at the same time.

In addition, some methods have been adopted in which a layer of elastomer, which will become the ground contact layer of the completed tire, is wrapped around the outside of the breaker layer, and then the elastomer layer is placed in the center of the carcass layer as described above, and the tire is assembled.

However, in these methods, since the crimping between each breaker ply and the carcass is performed using a rotating roller, the cords may be disturbed or the breaker ply may be displaced, so it is not a sufficient countermeasure. Even if pre-caulking breaker layers are to be prepared, since the breaker forming device is integrated with the carcass curved surface forming device, only one set of breaker layers need to be prepared, selected between molding cycles. There is a slight difference in time between the time required to assemble the breaker layer and the time required to prepare the carcass layer to receive the breaker layer, and there may be downtime in the assembly or preparation operations on either side. It is inevitable that it will occur.

In addition, from the perspective of improving the performance of product tires, radial tires have been proposed that use a special breaker ply with one wider breaker ply, folded back at both ends, or a special breaker layer with a different cord angle across the width. However, the time required to assemble a breaker layer with such a structure is incomparably longer than the time required to simply mold a laminated known breaker layer. A device directly connected to the layer curved surface forming device is disadvantageous because the above-mentioned downtime is increased.

Therefore, the present inventors first developed a method for assembling a green case for a radial tire, using a dedicated device that is independent of the device that curves the carcass layer, so that the mutual breaker plies can be firmly connected in advance without disturbing the cord angle. We proposed a method and various devices for forming a breaker layer by pressure bonding and incorporating it into the carcass layer.

As proposed above, the present invention enables the breaker layer formed in a separate molding process and device to be assembled into the carcass layer with high accuracy when receiving it into the device that curves the carcass layer, and to efficiently apply grease for radial tires. The purpose of this invention is to realize an apparatus for manufacturing cases.

The present invention will be specifically explained below with reference to embodiments shown in FIGS. 1 to 9.

In FIG. 1, a is a first device that molds a breaker layer or a single layer of breaker layer and elastomer, and transfers the molded product such as a breaker layer to a second device to be described later for the next process; The breaker layer etc. transferred from device a,
A second device (C) transfers the breaker layer, etc., which is inwardly gripped by the second device, from the inner grip to the outside from the inner grip. A third device d transfers the carcass layer to the center position of the carcass layer and turns the carcass layer into a curved surface to complete a green tire; This is a loop-shaped track that guides the second device when it is transferred to the third device C1 or another storage location by the second device. After the empty second apparatus has been transferred to the third apparatus C or another storage location, the empty second apparatus is guided back to the position of the first apparatus a, forming one circulation path.

The device of the present invention has the first device a, second device b, third device C, and loop-shaped track d arranged as shown in FIG.

Next, each of the above devices will be explained in detail.

FIG. 2 shows the detailed structure of the first device a. In the figure, 1 is a pedestal installed on the foundation, 4 is a headstock attached to the pedestal 1, and the headstock 4 is
A drum shaft 3 having a collapsed drum 2 is mounted on the drum shaft 3 as shown in the figure, and the shaft support of the drum shaft 3, a rotation drive device, a stop device, and a device for expanding and contracting each segment of the drum 2 (all of which are shown in the figure) (omitted) is built-in.

Further, each segment of the collapsed drum 2 has the width of the breaker layer to be formed, and forms a cylindrical shape having an outer diameter that is the same as the inner diameter of the breaker layer at maximum expansion in the radial direction. There is.

5 is a guide rod installed on the pedestal 1 as shown in the figure, and 6 is attached to the guide rod 5 so as to be able to slide freely between the E position and the RO position along the axial direction, and is driven by a drive source (not shown). The bracket 6 is a sliding bracket, and an annular member 8 having a plurality of fluid pressure cylinders I at equal intervals along the circumferential direction is fixed to the outer periphery of the bracket 6.

Reference numeral 9 denotes a plurality of segments assembled to the ends of the ronds of each of the fluid pressure cylinders 7 via pins 10, and these segments 9 are connected to each of the fluid pressure cylinders 7 (not shown).

), it expands and contracts inward and outward in the radial direction, forming a means for crimping and gripping the breaker layer.

and upper shoe members 1.2, 3, 4, 5, 6° 7.8, 9,
10 etc. constitute a first device a, and the first device a is
As shown in FIG. 1, a plurality of units (four units in this example) are installed at equal intervals inside one straight section of the loop-shaped track d.

Figures 3 and 4 show details of the second device. The vehicle e travels on the main track d1 using wheels 13 attached to a drive shaft 12 which is driven and rotated by a motor 11 disposed on the vehicle body.

The motor 11 also has current collectors 14 protruding from both sides of the cart e.
It operates by being supplied with power from an electric wire 15 suspended from the ceiling of the building via a cable 14b.

Reference numeral 16 denotes a connection box mounted on the trolley e, and a push button control box (not shown) installed on the arm 17 suspended on the trolley e.
The drive and stop of the motor 11 of the truck e are controlled by electric commands from the limit switch 18 of the collision prevention detector and the stop position detection limit switch 19.

Reference numeral 20 denotes a hollow shaft fixed to the lower end of the suspension arm 17 as shown in the figure, and a threaded rod 21 is rotatably supported inside the hollow shaft 20.
Reverse threads are provided on the left and right with the line as the center line, and nuts 22 are screwed into these threaded portions, respectively.

A guide pin 24 is fixed to each of the pair of bubs 23 that can slide in the axial direction on the outer peripheral surface of the hollow shaft 20.
The hollow shaft 20 is fixed to each nut 22 by passing through a notch 20a provided along the axial direction.

The threaded rod 21 is rotated in forward and reverse directions by a motor 27 fixed to the lower end of the arm 17.

Reference numeral 25 denotes a plurality of fingers connected to the pair of bubs 23 by pins via levers 26, and as the threaded rod 21 rotates, the fingers 25 move along the W2-W2 line in the axial direction. As the pair of bubs 23 move toward or away from each other, the bubs 23 are expanded and contracted in a radial direction inward and outward synchronously while maintaining a horizontal posture.

28 is a bubble provided at the outer end (left end in the figure) of the hollow shaft 20, and the distance 11 between the end face i of the bubble 28 and the W2-W2 wire holder is the end face j of the bracket 49 of the third device, which will be described later. is set to match the interval e1 between and Wo-wo.

Further, the axial center position of the threaded rod 21 is set to be located on the axial center line of the annular member 8 and the drum shaft 3 of the first device a.

(See FIG. 2) The above-mentioned members e, 11 to 28, etc. constitute a second device, and a plurality of the devices are arranged on a loop-shaped track d.

(See FIG. 1) Details of the third device C are shown in FIG. 5, and as shown in the same figure, it consists of a headstock device A and a headstock device B.

The headstock device A comprises a conventionally known carcass layer curving device, a side wall member of a mold member, and a drive device therefor.

In FIG. 5, 32 is a main shaft rotatably mounted on a housing 34 installed on a base 33 as shown in the figure.
The interior has a pressure fluid passage 35 supplied from a pressure fluid supply source (not shown), and the tip of the main shaft 32 can be coupled to and separated from a tail stock shaft 36 of a tail stock device B, which will be described later. At times, the tailstock shaft 36 has known means to prevent rotation of the main shaft 32.

Further, on the outer periphery of the main shaft 32, there is a sleeve shaft 38 which can slide on the main shaft 32 in the X-X axis direction and can rotate simultaneously with the main shaft 32 by a known method (not shown). 38 slides along the X-X axis symmetrically and synchronously with respect to the Y-Y axis by known means.

At the tips of the outer shaft 37 and the sleeve shaft 38, a flexible bladder 39 is held by a known method, and a bead ring 40 attached to the sleeve shaft 38 and a bead ring 41 on the tail stock device B side are used. , the green carcass 42 pre-swaged by a known method is held, and if necessary, the bladder 39 and the green carcass 42 are shaped with the Y-Y plane as a plane of symmetry using a pressure fluid supplied from the fluid passage 35 in the main shaft 32. The bladder 39 can be shaped into a curved body (toroidal shape), or can be shaped into a cylindrical shape as shown in the figure by discharging the pressure fluid.

The side wall type member 43 slides on the sleeve shaft 38 by the expansion and contraction of the hydraulic cylinder 44 mounted on the housing 34, and is moved to the bead ring 40 position (the illustrated position) or separated. It has become.

The tail stock device B has fluid pressure cylinders 46 and 47 rotatably mounted around the Z-axis by a known method on a housing 45 fixed on the base 33, and the rod of the fluid pressure cylinder 46 A breaker gripping device and a mold member driving device are attached to the tip via a slide block 48 that slides on the rod of the hydraulic cylinder 47 when the rod is extended.

Further, the slide block 48 can extend the rod of the hydraulic cylinder 47 and connect the bead ring 41 to the tip of the outer shaft 37 of the headstock device A.

Also, inside the fluid pressure cylinder 47 near the rod tip,
It has a tailstock shaft 36 that is only rotatable.

Therefore, the tailstock shaft 36 is displaced as the rod of the hydraulic cylinder 47 expands and contracts, and is rotatable at any position.

The tail stock device B is rotated around the Z axis (an axis perpendicular to the plane of the paper) by a rotary drive device (not shown), and moves from the Wo-Wo position in Fig. 5 to the Wl-W1 position in Fig. 6, and then moves forward. In this case, as shown by the two-dot chain in FIG. 5, it is connected to the second device at the W2-W2 position.

In this case, the end face j of the bracket 49 and Wo-W.

The distance e1 from the position is the same as the distance 11 between the end surface i of the bub 28 in the second device and the W2-W2 position.

Therefore, the breaker layer formed with its center at a distance of 11 from the end of the drum shaft of the first device a is the breaker gripping device at a distance of J't (lt=ffl't) from the end surface J of the bracket 49a of the third device C. is reproduced at a position that coincides with the center of the carcass layer, that is, the center of the carcass layer.

The side wall type member 50 is mounted on an annular member 52 attached to the tip of a guide rod 51 that is slidably inserted in the X-X axis direction along the slide block 48, and is fixed to the slide block 48. It moves forward and backward by the expansion and contraction of the rod of the hydraulic cylinder 53.

The arc-shaped gripping ring 54, which is divided into a plurality of parts along the circumferential direction, is attached to a guide rod such that it can be displaced inwardly and outwardly in the radial direction about the 56, and these guide rods 56 are slidable on the bracket 55.

Further, the gripping rings 54 are synchronously driven and slid by hydraulic cylinders (not shown) fixed to each bracket 55.

The bracket 55 also has a locking device that closes and integrates the gripping ring 54 and the side wall type member 43.50, which locking device includes a locking block 58, a guide rod 5
9, consisting of a fluid pressure cylinder 60, etc., the fluid pressure cylinder 6
0 is mounted on the bracket 55, and the tip of the rod is connected to the lock block 58, and the bracket 5
The lock block 58 is displaced in the radial direction by a guide rod 59 that is slidably inserted into the lock block 5.

As shown in FIG. 7, the cross-sectional shape of each grip ring 54 is such that both outer circumferential edges are formed into conical surfaces, and the side wall type member 43
．． It is adapted to mate with the inner conical surface of 50.

Further, the conical surfaces of the inner peripheral edges on both sides of the lock block 58 are adapted to fit with the outer conical surfaces of the side wall type members 43 and 50.

Therefore, after each grip ring 54 is expanded radially outward by a hydraulic cylinder (not shown), the side wall type member 43
, 50 are fitted with their inner conical surfaces to the opposite conical surfaces of the gripping ring 54, and then the hydraulic cylinder 60 engages the circumferential inner conical surfaces of the locking block 58 with the side wall type members 43, 50.
50, each gripping ring 54 is closed with a sidewall-shaped member 43.50, and the sidewall-shaped member 43.
50 is closed and integrated with a lock flock 58.

(See FIG. 7) The inner surface of each gripping ring 54 in this case lies on one circumference centered on the It is designed to match the diameter.

The loop-shaped track d consists of the main track d1 and the branch track d2, as mentioned earlier, but the main track d1 is formed in a loop shape as shown in Fig. 1, and the branch track d2
are laid between each part of the first device and the third device and the main track d1, and the inner track d1. Details of the relationship of d2 are shown in the upper left part of FIG. 4, and in FIGS. 8 and 9.

As shown in those figures, the branch track d2 is the main track d
A pair of guide rails 2 are suspended from the ceiling of the building so as to be perpendicular to the main track d1 in a partially cut out part of the guide rail 1.
The guide rail 29 is mounted on the lower surface of one side of a frame 30 that can be reciprocated via wheels 31 on the frame 30, and is driven and rotated by the operation of a drive device g provided at an appropriate position on the frame 30. It is possible to reciprocate along the direction perpendicular to the main line trajectory d0, and at the position where the reciprocating movement occurs, the main line trajectory d
1, and in other positions the first device a or the third device a.
It is possible to approach device C.

h is a spare track installed on the lower surface of the other side of the frame 30, and the spare track is designed to cut out the notch of the main track d1 when the branch track d2 approaches the first device a or the third device C side. The second device is connected to allow passage of the second device.

(See Figure 8) After the second device transferred from the main line track d1 onto this branch track d2 receives a stop signal on the branch track d2 and stops, the frame 30 moves along with the branch track d2 to the main line track d1. When moving in the right angle direction, the current collector 14a on the main line track dl side is connected to the electric wire 15 on the main line track d1.
Although the power supply from the wire 1 on the branch track d2 side is cut off,
5/, the current collector 14b on the side of the branch line comes into contact and the power supply is restarted.

(See FIG. 4) Therefore, the movement of the second device on the branch track d2 by the motor 11 is controlled by the operator's will by operating the operation box (not shown).

In addition, an empty second device without a breaker layer that has traveled on the main line track dl is installed on the main line track with an operation switch (not shown) by the worker of the first device a for a stop command (not shown). Those skilled in the art can easily understand that the cam plate is made to protrude and when the limit switch 19 installed on the trolley e of the second device touches the cam plate, the motor 11 is stopped and the trolley e is stopped. By the way, the details will be omitted.

In addition, if the second device that has been traveling on the main line track dl is moved to the branch line track d2, the worker operates an operation switch (not shown) to move the branch line track d2 together with the frame 30 to move the branch line track d2 between the reserve track and the main line track. Connect d1.

Of course, it is also easy to design such that this operation can be performed automatically.

An embodiment of the apparatus of the present invention is configured as described above, and a radial tire is molded by the apparatus according to the following process order.

([) Molding process of breaker layer First, the breaker layer is molded by the first device a. During the molding, the collapsed drum 2 of the first device a is expanded into a cylindrical shape and the drum shaft 3 is rotated. While rotating, the breaker ply is properly wound around the outer peripheral surface of the drum 2 to form a layer.

Then, when the desired layered state is obtained, the crimping and breaker layer transfer device of the first device a is moved to the drum 2 side, and the drum 2
The upper breaker layer is strongly crimped with segments 9 from the outside.

Since the pressing action by the segments 9 is performed simultaneously on the entire outer peripheral surface of the breaker layer, a good breaker layer can be obtained without the possibility of uneven distortion or disturbance of the cord angle, which is caused by conventional roller pressing.

Then, when the collapsed drum 2 is folded up, the breaker layer remains held by the segment 9 portion of the crimping and breaker layer transfer device.

Then, after moving the crimping and breaker layer transfer device to the E position shown in FIG. 4, the breaker layer is sent to the second device according to the procedure (ii) described later.

(11) Step of feeding the breaker layer to the second device.

The empty second device runs on the main track d4 and reaches the vicinity of the first device a, which is installed on the side of the main track d1 and on which the breaker layer has already been formed in step (i), Branch track d2 (in this case, branch track d2 is tangential to main track d1).

), when the worker of the first device a operates the stop command push button of the second device, the cam plate is projected onto the branch track d2, and the second device that has been traveling The cam plate detection limit switch 19 of the device senses this and stops the motor 11.

When the second device stops on the branch track d2, the frame 3
The drive device g of No. 0 is activated and shifts the branch track d2 to the position shown in FIG. 8, so that the reserve track connects with the main track d1.

Until this branch track d2 is shifted to the above position, the following empty second device running on the main track d1 detects the protrusion of the cam plate provided on the upstream side of the main track d1. The limit switch temporarily stops the branch track d2 (until the shift of the branch track d2 is completed and the backup track connects with the main track d0).

In addition, while the following second device is temporarily stopped as described above, if a second device, which will be described later, catches up with the second device, the rear collision prevention detection limit switch 18 (see Fig. 3) ) is detected and its running is stopped.

The second device located on the branch track d2 shifted as described above moves the second device to the center of its finger 25 as shown in FIG. 4 by operating a push button attached to the second device. After advancing the second device so that the centers of the segments 9 of the first device a coincide with each other, the second device is stopped at that position.

(In this case each finger 25 of the second device is contracted radially inward and is smaller than the inner diameter of the breaker layer.

) Next, each finger 25 of the second device a is expanded, and the breaker layer gripped at the inner periphery of each segment 9 of the first device a is strongly pressed from inside with the outer periphery of these fingers 25, so that the fingers 25 are expanded. After stopping the expansion,
The breaker layer is transferred from the first device a to the second device by retracting the rod of the hydraulic cylinder 7 of the first device a and expanding each segment 9 outwards.

(iii) Feeding the breaker layer from the second device to the third device and incorporating the breaker layer into the carcass layer.

The second device holding the breaker layer formed as described in (11) above is returned to the main track d1, further travels on the main track dl, and reaches a position near the desired third device C. The breaker gripping and conveying device of the third device C, which is transferred onto the branch line track d2 in the same manner as in step (11) above, but which has completed the work of assembling the breaker layer of the previous cycle, is shown in FIG. The device rotates around the Z-axis of the device and further moves to the second device position.

In this case, of course, the gripping ring 54 of the third device C is expanded to a larger diameter than the outer diameter of the breaker layer internally gripped by the fingers 25 of the second device C.

Then, the gripping device of the third device C moves forward, and the bracket 49
When the end surface j of the third device C hits the end surface i of the bub 28 of the second device C, the forward movement of the gripping device of the third device C is stopped.

Then, the grip ring 54 of the third device C contracts and the second
Firmly grip the outer peripheral surface of the breaker layer held by the fingers 25 of the device.

Then, when each finger 25 of the second device is retracted,
The breaker layer is transferred from the second device to the third device.

In this case, the distance between the end surface j of the bracket 49 of the third device C and the center of the breaker grip ring 54 is 1'1, and the distance between the end surface i of the bub 28 of the second device C and the W2-W2 line position is 1'.
1, that is, the center of the breaker layer is the center of the grip ring 54, and therefore the center Y of the carcass layer when it is rotated around the Z axis and moved to the carcass layer position.
-Y, the flaker layer is incorporated into the carcass layer with the center of the breaker layer coincident.

Then, after contracting the fingers 25, the gripping device is turned to W.
The device is moved from the 2-W22 device to the Wl-W11 device (Fig. 6), and further rotated around the Z axis to become the Wo-Wo0 device.

During this time, on the head stock device A side, the green tire that has been formed in the previous cycle is discharged, and the carcass layer to be formed next is received.

When the insertion of the carcass layer and breaker layer is completed as described above, the rod of the fluid pressure cylinder 47 of the third device C is extended, and the bead ring 41 at the end of the rod is brought into contact with the main shaft 32 of the headstock, and then The extension of the rod of the hydraulic cylinder 46 causes the slide block 48 and the member mounted thereon to move forward until the Wo-Wo or Y-Y position numbers match.

Next, while continuing to extend the rod of the fluid pressure cylinder 47 and supplying pressure fluid into the bladder 39, the outer shaft 37,
The sleeve shaft 38 is symmetrically and synchronously approached with respect to the Y-Y position, and the left and right bead rings 40, 41 are synchronously approached.

Immediately before the synchronous approach of this bead ring 40.41,
The supply of pressure fluid in the bladder 39 is temporarily stopped, the left and right bead rings 40, 41 and the side wall type members 43.50 are brought closer together, and the conical surface of the side wall type members 43.50 is gripped by the grip ring 5.
The grip ring 54 is closed by meeting the outer conical surfaces of both ends of the grip ring 54.

Next, the inner conical surfaces at both ends of the lock block 58 are fitted with the conical surfaces on both needle sides of the gripping ring 54, and as shown in FIG. 7, the outsides of the carcass layer and the breaker layer are all surrounded by a closed mold member.

After this closure is completed, a stronger pressure fluid is again supplied into the bladder 39 to strongly press the carcass layer and the breaker layer together.

After this crimping is completed, the left and right bead rings 40.degree. 41 remain as they are, the closed mold member is opened and retreated to an appropriate position, and the necessary layer of elastomer is wrapped from the outside to complete the green tire molding operation.

After completing the molding work as described above, the gripping and conveying device of the third device C is moved backward and rotated to receive the next breaker layer, while the headstock device A takes out the completed green tire and starts the next molding. The receiving of the carcass layer for this purpose is carried out.

Of course, in the second device, the next breaker layer has already been received in the same manner as in step (11) above.

In this manner, the first device a cooperates with the second device a to independently form the mold according to its own molding cycle.
The shaping of the breaker layer is carried out effectively, and the third device C cooperates with the second device to effectively and accurately incorporate the breaker layer into the carcass layer independently of the first device a.

Further, in the case where a single layer of elastomer is incorporated on the outside of the breaker layer in the first device a, the grip ring 54 of the third device C and, depending on the case, the side wall type members 43 and 50 may be replaced.

Further, by arranging the first device a and the third device C, which have different production sizes, along the straight line portion of the loop-shaped track d, green tires of different sizes can be produced.

Furthermore, in the example shown in the first figure, a plurality of first devices a and third devices C are arranged along the straight part of the loop-shaped track d, but one first device a and one third device C are arranged. A plurality of second devices may be arranged on the straight line portion of the loop-shaped track and run on the loop-shaped track d.

Since the device of the present invention has the above-described configuration and operation, according to the present invention, (1) When forming the breaker layer by the first device a, the disorder of the cord angle and eccentricity of each breaker ply are prevented. There is no risk of the occurrence of scratches or non-uniform crimping.

(2) While being incorporated into the carcass layer attached to the headstock side of the third device C, the breaker layer is maintained in a normal cylindrical shape and does not suffer from distortion.

(3) When incorporating the breaker layer into the carcass layer, its center can be easily aligned with the center of the carcass layer.

(4) Since the molding operations of the first device a and the third device C are performed independently, their capabilities can be fully demonstrated.

The advantages (1) to (4) above have the practical effect of efficiently producing green tires for radial tires with good quality.

[Brief explanation of drawings]

The drawings are schematic explanatory diagrams of one embodiment of the present invention, in which FIG. 1 is an overall plan view, FIG. 2 is a side view of the first device and the second device,
Fig. 3 is a side view of the second device partially shown in cross section, Fig. 4 is a view taken along the line IV-IV in Fig. 3, Fig. 5 is a plan view of the third device, and Fig. 6 is a tail stock. FIG. 7 is an explanatory diagram of the operating state of the grip ring of the third device; FIGS. 8 and 9 are explanatory diagrams of the operating state of the branch track. a: first device, b: second device, C: third device, d: loop-shaped track consisting of main track d1 and branch track d2, A: headstock device of third device, B: tail of third device Stock device, 2: Collapsed drum, 9: Segment,
25: Finger 54: Grip ring.

Claims (1)

[Claims] 1. In an apparatus for manufacturing a green case for a radial tire by forming a breaker layer with an annular breaker layer or a breaker layer having a single layer of elastomer for the contact surface and incorporating the formed breaker layer into a carcass layer, a plurality of radially synchronous breaker layers are formed. A collapsed drum is formed of segments that can be displaced in a direction, and the gray cover is wrapped around the outer circumferential surface, and a breaker ply that moves in the radial direction and is wrapped around the collapsed drum is simultaneously crimped from the outer circumferential side to form a breaker layer. a plurality of first devices comprising a plurality of segments to be formed, a plurality of first devices having a crimping means that grips the breaker layer at the inner f40 circumference of the segment and moves in the axial direction, and a plurality of fingers movable in the radial direction; The breaker layer pressure-molded by the first device is moved between a breaker layer receiving position and a green case forming position through a plurality of second devices each having a drum that grips the breaker layer by the outer periphery of the fingers. A plurality of third devices each having a grip ring that receives the breaker layer from the drum of the second device on the inner circumferential side and which incorporates the breaker layer into a predetermined position of the carcass layer; and a loop-shaped track consisting of a main track and a branch track. The first device and the third device are fixedly installed at a suitable position on one side of the branch track of the loop-shaped track, and the second device
A green case manufacturing device for radial tires, characterized in that the device is capable of traveling on a loop-shaped track.