JPS5970547A - Method and apparatus for manufacturing radial tire - Google Patents

Abstract

PURPOSE:To improve the quality of a tire with a higher productivity by performing work of an inner liner layer IL and a carcass ply CP on a flat, cylindrical drum to facilitate joining operation. CONSTITUTION:An assembly forming drum (k) which assembled an inner liner IL and a carcass ply CP to form a carcass band CB extends the diameter of a part corresponding to a transfer carrier 0 accurately grasping a bead core BC to be fed from a bead core feeder P so as to press solidly thereon and forms a band body BB. On the other hand, a green carcass forming drum (d) winds thereon a side wall SW cussion rubber and the like to be fed from material feeder (f') to form a structural body. The drum (d) presses the structural body on the inner surface of the band body BB extending the diameter thereof and air is blown from a frame (e) to make the state between bead cores BC toroidal. On the other hand, the band body BB is welded under pressure with the bead core BC folding back it at the outer end thereinto and then the product is assembled with a belted tread body assembled BT with a drum (a) to complete a green tire.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for manufacturing a radial tire.

When manufacturing radial tires, as shown in FIG. 1, a belt/tread structure forming drum (a) that can be expanded and contracted,
A pedestal (b) that rotatably supports the drum (a) and is equipped with an expansion/contraction mechanism, and a material supply device (
c), a carcass-formed ram (d) that can freely expand and contract between a cylindrical state and a toroidal state, and a rotating ram (d) that rotatably supports the rotary ram (d) and is equipped with an expansion and contraction device; A pedestal (e) equipped with an approach/separation mechanism, and ','-i
+3 Material supply equipment R (f) for supplying structural members such as inner liner, chafer, carcass ply, side wall, etc. that make up the carcass, and a belt and belt on the ram (a). The tread structure is gripped from the outside and moved to the position of the front ram (d), and the structure is installed on the outer periphery of the green carcass which has been compressed into a toroidal shape by the drum (d), thereby creating a completed green tire. There are expandable and retractable gripping claws that grip the drum from the outside and remove it from the drum (d), and a device that places the left bead core at the measurement position when the drum (, i) is in position. a gear carrier (gl), a moving track and drive device for the carrier (g), a crimping device (i) for appropriately crimping the structure on the drum (a), and a crimping device (i) for appropriately crimping the structure on the drum (a); fg)
The tire manufacturing equipment for the one-step molding method, consisting of a crimping device R(j) for crimping the ruto tread structure to the green carcass, was delivered by Japanese Patent Laid-Open No. 54-
Although many types are known, including the one described in Japanese Patent No. 125277, they all have the following drawbacks in common.

That is, the drums (a) and rams (d) are arranged coaxially so as to face each other, and on the drum (dl), (1) first, a first sidewall isolated from the left and right portions constituting the tire sidewalls is wrapped around the drum (dl); (1) Then, cushion rubber, etc., which is used to protect the tires that come into contact with the wheel parts attached to the car, is wrapped and joined, (1)
) Then the inner liner rubber sheet is wrapped and bonded ([V) 4. Then the rubber sheet (commonly called carcass) containing fibers (often drums (steel cords arranged parallel to the dlO axis) After the leap, a bead core is arranged symmetrically with respect to the center of the drum (a). ) process (
■Shows the state after the process is completed. (To) The lower part of the beat core of the drum 9 (d) is expanded, and the material layer on the drum 9 (d) is pressed onto the inner circumference of the beat core.

Note that FIG. 2(b) shows this state. (VID) Then, after narrowing the gap between both bead cores and supplying air with air to form a toroidal shape, the material layer at the outer end of the bead core is folded back so as to wrap around the bead core,
It is pressed onto the toroidal material layer. (Vlll) Also, at an appropriate time during the above work, the pre-assembled
The tread structure is prepared in the center of both Bibi cores, and the front R1
;A toroidal shape grows on the surface of the structure and both are joined.1. Finally, the tire is crimped and molded using a crimping device to complete the tire. However, the drum (d) has the lower 4'1i (V
XVI) (Vll) Unexamined Japanese Patent Publication No. 55-12464
As proposed in the invention described in Publication No. 0, the bullet f1
It is composed of one piece, has a soft surface, and the material such as the side wall to be wrapped has a triangular shape with long sides, so when wrapping the inner liner rubber sheet and carcass ply, It's not a flat surface, it's uneven. As a result, when the worker tries to wrap and join the inner liner rubber sheet and carcass ply, it is extremely difficult to work and it is extremely difficult to make the amount of joining lap uniform over the entire area of the joint. Moreover, it has the disadvantage that the quality of the product tire becomes unstable and productivity is significantly reduced. Furthermore, since the surface that is the basis for winding is unstable and uneven as described above, it is difficult to automate the work.

The present invention deals with the above-mentioned problems, and includes a method in which a bead core is coaxially arranged outside a carcass band assembled in advance into a cylindrical shape, the diameter of the band is expanded, and the band and the lower part of the bead core are brought into pressure contact with each other. After forming the band structure without pressure welding, these are coaxially transferred to the outside of a structure composed of a side wall, cushion rubber, etc. that has been assembled into a cylindrical shape, and the diameter of the structure is expanded to form the above-mentioned structure. The band structure is pressed into contact with the inner surface of the band structure, and the diameter is further expanded as necessary to make pressure contact between the band and the inner surface of the bead piece, and then the space between both bead cores is made into a toroidal shape. Bread 1: Fold the structure around the bead core and attach the pre-assembled circular belt/tread structure to the outer part of the toroidal band structure, and attach the button to the radial tire. Completion of green tire "Method for manufacturing a radial tire with 1n grooves, and a carcass band forming drum and a carcass band forming drum arranged coaxially facing the carcass band forming billam to form a carcass band 9 in a toroidal shape. a green carcass forming ram 1-9, and a pair of beads 1-8 provided to reciprocate between the two drums and coaxial with the shaft center.
A beat core and carcass band transport carrier having a core holding device g, and a beat S bore prepared outside the center of the Tkff axis are held from the inside and are transported to the beat core holding device Tkff with a thin shaft. The bead core is vertically shaped, and the bead core holding device is used to hold the bead core at 9°C.
Regarding manufacturing equipment for radial tires featuring rotors,
The target location is Inner Liner Gono Sea River.
It makes it easier to perform the lamination and joining work, makes the amount of J of the 4M joint uniform, keeps the tire crystals t1q, y, - constant and in the same direction, and improves productivity. To make the quality of tires uniform, to make the quality of tires constant, to make it possible to move from 1 to 2, and to make production 1 cow to go. In addition, the bead cores are automatically supplied to the bead 9 core holding device.
, improve productivity by turning labor saving into OJ function. An object of the present invention is to provide a method and apparatus for manufacturing a radial tire.

Next, the method and apparatus for manufacturing a radial tire of the present invention will be explained in the sixth section.
To explain with reference to an embodiment shown in FIGS. 7 to 7, the belt/tread structure forming drum (a) shown in FIG.
a substantially cylindrical rigid drum having approximately equal outer circumference lengths, the outer circumference being smaller than the inner circumference of the assembled belt tread structure when reduced in diameter; For example, those described in JP-A-55-135647 and JP-A-55-135648 may be used. The frame (b') mounts the drum (a) so as to be able to freely stop its rotation, has a supply device for compressed air for expanding and contracting the drum (a), and also has a position at which the winding of each monthly profit starts. In other words, it is equipped with a stop position control means for distributing the seams of the material as planned in the circumferential direction. Edible food 1 that moves on the arranged orbit by a known driving means
j, at the forward limit position, the axis of the drum (a) is made to coincide with the axis of the drum (dt and (k), which will be described later) (see V), and at the backward position 1 to the carrier ( )(
0) passes nearby at dawn and 1. r (see ■). Further, at the forward and reverse limits, the position is accurately determined by a known stopper, and each is equipped with a detector. Then, when in the rlif+ arrangement (Vf1 position, the bolt tread structure is assembled on the drum (a) according to a predetermined procedure. Also, the balt tread structure is assembled on the drum (a) in a predetermined manner. The drum (dl) supplies the constituent parts of the belt/toe structure assembled on the dl, and there are many known examples, and detailed explanations and explanations will be omitted. is equipped with a pair of left and right beadlock portions that are expandable and retractable, and an expandable and retractable device on each of the outer parts of both beadlock portions, and a pair of expandable and retractable devices on the bead lock portion side. Any structure may be used as long as it has a structure that allows the left and right sides to approach and move away synchronously, and for example, the one described in Japanese Patent Application Laid-open No. 124640/1983 is used.

The mount frame (e) is configured to rotatably and stopably mount the drano and (d), and also includes a supply device for supplying pressurized air for expanding and contracting the bead lock member of the drano and (d), and the expansion and contraction device. It has a supply device for supplying pressurized air, a supply device for pressurized air for deforming it into a toroidal shape, and a mechanism for relatively and synchronously surrounding the left and right beadlock members, for example. Those described in Japanese Patent Publication No. 5-5-49 and Japanese Patent Publication No. 55-32544 are used. (d) The side walls, cushion members, etc. that are assembled above are supplied by the material supply device (C) and the material supply device (m) described below. 1, and the belt tread structure transfer carrier (end) is t'Jf71t12)"ram (a,
The belt/tread structure completes assembly on l, and 1-
After the ram (a) moves to match the axes of the drums (d) and (k) and stops (V position), it surrounds the structure on the drum (at) from the outside, and It has an expandable segment that grips the surface partially or entirely from the outside. This expansion/contraction mechanism is installed on a movable bogie that runs on a track (k'). For example, a conventional carrier (g) without the bead core holding device is used. be done. In addition, the track and drive device (h) includes the belt/tread structure transfer carrier (0) described above and the inner liner, carcass ply, and bead core assembly transfer carrier (0) described below.
) (hereinafter referred to as band carrier (o)). Even if the orbit is used in common for both carriers, it is common to use 1. j:r<, but the drive devices are provided separately. The driving device of this band carrier (ol) moves the carrier (o) to one position of the drum (k), and
A stop position control means and an rzvI4 adjusting device are provided at the 11 position, which receives the supply of the 6 (CK) core, and the 11 position where the core is supplied. In this case, after the carrier (0) receives the beat 9 cores from the bead core supply device (p) described later at the ... position, the drum (, i) at the 1st position receives the assembly of the bead core and inner liner/carcass ply. Wait at the position ■ until it is ready to be loaded, then move it to the serving position, hand over the assembly to the To9 ram (i), then move it to the position ■, and place the bead core to be used next. It is designed to carry out a series of actions such as receiving and waiting until the specified work on the drum (k,) is completed.On the other hand, the drive device of the Hult tread structure transfer carrier (〆) is , without interfering with the work on the drum (d), and preventing the carrier (0) from moving to position (I) on the drum (i), and between the standby position IV on the side of the pedestal (e) and the drum (i). a) The receiver of the upper silt tread structure is movable between the take-up position and the drive device.
The stop position control means is provided with a stop position control means and an adjustment device for controlling the carrier (g') to stop accurately at the position ■ and the position ■ of the drum (d). l, -carrier (which receives the tread 9 structure)
〆) is moved to the 1■ position, and the drum (d) waits at the ■ position until the time when the structure is required, and the carrier (→ supplies the band to the 9 ram (dl) and moves to the ■ position. Evasion (After 7, move the carrier (〆) to position ■, align the structure with the center position of the drum (d), and pull it to the toroidal band with the ram (a). n(
l ~, then moved to ■ position, waited while the crimping device (j) is working, and then moved to ■ position again! Make TfJ+, pick up the completed tire, eject the tire at position ■, and press ■ again.
After moving the structure to position 9 and waiting until the ram (a) reaches position ■, it receives the structure at position ■, moves it to position 1■, and waits until the next supply period. It is supposed to be done. In addition, the pressure N device 0) is
This is a pressure bonding device for more reliably bonding the belt and tread to the phase 1j-, which is layered on the r3 drum (a).
/ Suy1 with a shape similar to Tsubi? 17
ing. Since the structure is clear from the explanation of the acid bath, further details and illustrations of the acid will be omitted. Also pressure M
The device (j) is a crimping device for reliably bonding layers together after the balt tread structure is delivered to the toroidal green carcass using the drum (d) soil. The one described in Japanese Patent No. 18275 is used. In addition, the inner liner/carcass ply assembly forming drum (k) (hereinafter referred to as the band forming P ram) can be expanded and contracted in 6 stages, and when expanded to the second diameter, the assembly forming drum (k) (hereinafter referred to as band forming P ram) It is a substantially cylindrical drum whose diameter is slightly smaller than the inner diameter of the bead core, and when the diameter is expanded to its maximum, the outer circumference of the band comes into contact with the inner circumference of the bead core, which has been placed at a predetermined position, and When the diameter is reduced, it is made sufficiently smaller than the inner diameter of the band. For example, the one described in Japanese Unexamined Patent Publication No. 55-124659 may be used. Also, the mount (initially, rotating the drum (k) above,
It is installed so that it can be stopped freely, and has an expansion and contraction drive mechanism for the front MU: tram (kl). A control means for controlling the stop position f* for the purpose of
The one described in Japanese Patent No. 19871 is used.
．． In addition, the crimping device (11) is a crimping device (11) that is assembled on the drum (k). After the required side slopes are wrapped around the carcass, the coils i1. Ply and bead core assembly transfer;
When the carrier (0) (hereinafter referred to as the mend carrier) is shown in Figure 5, the band gear carrier (o) moves on the orbit (k') mentioned above. Table piece (1
) and the ratio ηLf11. ．． J-, are fixedly arranged in 3-bi rows on the front i1' orbit. , the GI-line motion device (2) has a right-side beat core holding device i4 (0-1) that can be moved individually on the trajectory (2a), and a 1-beat 9-core mounting device f. , (0-2).Since the configuration of each unit W (0-LXO-2) is the same except for the left and right sides that are symmetrical, the right side unit M(0-],) (II device (0-1) is the bearing nut (2b) engaged with the raceway (2a).
A plywood (3) on which (2b) is fixed, a ring (4) on the same base plate (3), and a ring (1) that can be freely moved around the outer circumference of the ring (4) in the axial direction. 51 (6), a plurality of sets of cylinders (7) each having one end engaged with the outer end flange (4a) of the ring (4) and the other end of the ring (5) (61); It is composed of a plurality of sets of arms (group +011) which are pivoted in a proper position and one end of which engages with the pins [8] and (9) which are fixed in the proper positions of the rings (5) and (6). Arm 0 (2) and (1
1) swings as shown by the dashed line due to the expansion and contraction of the cylinder (7), the swinging is performed so as to accurately grip the bead core (Be) supplied to a predetermined position by the bead supply device (p) described later. In addition to being regulated, the bead core (BC) is provided with a claw (1 blunt) suitable for the shape of the bead core to be gripped. Even if the arm (101 (1, 1) is expanded, it will not be an obstacle when the bead core is opened. After supplying, the arm (IO) (marked) is swung to grip the bead core from both sides. It is possible,
After gripping, the position of the bead core does not go out of order even if the inward grip by the bead supply device is released. Historically, when releasing the grip at the ■ position and returning it to II fSr @, -r -m (1
01(1,1)+! Even if the VC is expanded enough, the drums (
d) The band carrier (ol) can be moved without contacting the B1 core transferred to the second band carrier.

For reference, the gripping interval of the B1 core is determined by screwing into the threaded rod (I4) provided at the end of the cart (1) (), a) K rotation self-control, and the same threaded rod (14). At the same time, the oak Ml was fixed in place on the plywood (3)! i) Interval adjustment pattern 4゛1~, hllRl; Neji Azusa (eyes) Q: h!
By rotating the handle (+ fi) installed on the tire, the tire size can be adjusted by rotating the handle (+ fi). It goes without saying that after adjusting the handle (l fi), the plywood (:3) is fixed (locked) to the trolley (1) by known means. In addition, the omitted tj L・l) not shown in the figure is the above-mentioned device ff&, (0-1)(
0-2) 0) In the middle part, a band grip between both bead cores that can be expanded and contracted, forms a curved surface that matches the outer circumference tY of the band when the diameter is reduced, and is larger than the outer diameter of the bead core by JIS when the eye is expanded. A device may also be provided. Since there are many well-known examples of the band gripping device ff &'j of II, the explanation of the parts 2 and above will be omitted. In addition, the bead supply bag rJp) is mounted on a trolley (21) that is movable on the stand (2))) and a known multi-axis robot device (#: (p-1)) mounted on the carriage (21)) and the arm of the robot. The bead gripping device (pl is a tire gripping device W having a plurality of claws that expand and contract in the radial direction There are a number of known devices, and an appropriate one should be used.The robot device (p-1) carries a bead core on the bead carrier (g), which will be described later. , as shown in Fig. 4, the phase 1 holding device is received in a horizontal state, and during the transfer, it is turned into a vertical state, and the 5th phase holding device is transferred to the band gear rear (OL) waiting at the 11th position.
Transfer as shown and deliver accurately. As shown in Figure 6, the robot device (p-i) has a notebook Z-carrier (
You can move around as per your convenience. The bead 1-' core transport vehicle (q) may be of any suitable type, such as a type that stores bead cores horizontally as shown in Figure 4, or a type that stores bead cores vertically, although not shown. use.

Next, let us explain the operation of the radial tire manufacturing apparatus. Figure 6 shows that a completed green tire with N wood grains is ejected at position V, a carrier (g') holds a structure (BT) of (N+1) wood grains, and 1
■The carrier (0) has (N4-1) an assembly of inner liner for wood grain, carcass ply, and bead core (hereinafter referred to as band B 1, "structure") (BB ) is grabbed, Drano, (+1
Waiting for the completion of a predetermined work on (N+1) wood grains at l-h. Further, in drum (a), the assembly of the belt tread structure (BT) for (N+2) wood grain continues at 7. Further, in the drum (k), the assembly (CB) of the (N+2) wood grain inner liner (I L ) and carcass ply (CP) continues. Furthermore, the drum ((
], ) indicates that the (14+1) end is in the state of starting work. From this state, (1) drum (d)
is made into a wire rod, wrapped with Zydewall (SW), cushion rubber (OR), etc., cut and joined (a). (1) After that, the carrier (0) moves to the fixed position and places the (tJ+1) wood-grained bunt structure (1313) coaxially with the drum at a predetermined position. This state is shown in the upper left half of FIG. (1) The diameter of the portion corresponding to the bead core (Be) K of the structure of the steel structure (SW) and the rubber CGRj is expanded from the inside, and the outer surface of the structure is formed into a band structure (BB).
The bead core is pressed against the inner liner # (IL) at the bottom of the bead core. 0■ After pressure contact, the bead gripping device of the gear rear (o) is released. This state is shown in the upper right half of FIG. Naohi);'The gripping device is expanded sufficiently larger than the outer diameter of the bead core. (The gear rear (0) moves to the expansion ridge and the position ■. Also, after stopping at the position ■, the bead supply device (
p) grips the bead core on the bead transport vehicle (ql,
Transfer the (N+2) wood grain bead core to the carrier (ol).Meanwhile, in the drum (k3-hi), transfer the (N+1) wood grain band structure (BB) to the carrier (o).
After handing it over to (N4-2) wood grain carcass band?
The molding of (CB) is started, and until the molding is finished, the carrier (o
l waits at position ■. (VD On the other hand, on the drum (dl side), after the key carrier (0) has moved to a position where it does not interfere with the work, the carrier (g') has moved from the 1v position to the 1 position, and the gripped (N+1) wood grain belt While setting the tread structure (13T) in the specified position, the drum (
In d), if the interval between both bead cores is shortened, pressurized air is supplied between both bead cores to make the space between both bead cores of the band structure (BB) toroidal.

Appropriate in between 7. At time C, the outer ends of the two bead cores are folded back by a known means so as to engulf the bead core, and the front H1 keloidal nodal structure (BB) is crimped to the side of the bead. Further, a toroidal shape grows and presses against the inner surface of the structure (BT). This state is shown in FIG. Next, the expansion/contraction fτIS material outside both bead cores is contracted by 5 VC as shown by the solid line in FIG. (■1) The carrier (〆) releases the outward grip of the body structure (BT), and ■
Then, the crimping device (j) reliably crimps the structure (BT) and the drawing body (BB) to complete a green tire (G'r) with (N+1) wood grain.

(■) After completing the crimping work, move the carrier (g') again to the 1■ position and stop, reduce the diameter of the gripping claws of Ir, t, , (g'), and remove the completed (N+1) grain. Grip the finished tire (GT) from the outside. Then the drum (d)
The bead lock side of the tire is reduced in diameter t7 to make its outer diameter smaller than the bead diameter of the tire. (■) During the work in (VI[l) above, although it is omitted in Figure 6, a suitable tire take-out device fixed at a suitable location outside the track (k') near the position ■ is removed from the track. Move from position to ■ position and wait. (
g) Completed (N+1) wood grain green tire (G
T) is gripped from the outside by the carrier (end), moved to the position ■, and stopped at ゛C. Release the grip from the green tire (G
T) is delivered to the tire removal device.

(Xl) After the grip is released, the carrier (g') moves again to position ■, and the tire take-out device moves from position ■ to a predetermined position outside the device to take out the tire, and then the tire is transferred to J1 by appropriate means. ! ,! It is removed and transported to the vulcanization process. (XI) After avoiding the tire removal device, (N+
2) The drum (a) after the molding and assembly of the tread structure (BT) is moved from the 1 position to the V position. Thereafter, the carrier (final) is placed in the V position, and the body (BT) is placed in the V position.
) from the outside, reduce the diameter of the gripping claws, and remove the structure (BT).
'a=Grip from outside. Also, after the loquat, the drum (a,)
k is reduced in diameter to a smaller diameter than the inner diameter of the structure (BT)
-Tro. (XI) )''After reducing the diameter of ram (a), ghee?
Set the rear (end) to the 1v position and turn the drum (a) at the appropriate timing.
,) from ■ position ff''a to ■1 position f1'\, (N+3
) Book 1'U's 414 belt treads (13'i:'
) begins molding and assembly. (X1v)-way, 1・゛ram(k)''2, (N + 7) books 11 in the prescribed procedure
The carcass bunt'' (OB) has been completed, and the gear rear (o
f stops at the 1 position" 1 what 2, the bead core (Be) is above +
Pressure is applied to a predetermined position outside of III + rest (CB). This state is shown in the left half of Figure 6 (7.
Expand the diameter and hold 1. A band (C13) is attached to the inner circumferential surface of the bead core (+3C;) that had been
). (XVI) After 1 [4 yen, the drum (k) is shrunk, and the diameter of the band (CB) is smaller than the inner diameter of the band (CB).
13F3) 4. Jll is attached to the gear rear (0) via the core (Be). It is also possible to add and use a gripping device (not shown in the figure) that surrounds and grips the band (OB) between the two pads from the outside. The -1 culm of the main/knee (XV) may be omitted, and the lead gripping device on the carrier (Be) may hold (Be), and the band gripping device (CB) may grip and convey (CB). (X% TI) Carrier (o) The gripped band structure (BB) is placed in the ■ position, and the (
N+2) Carrier (0) waits until the main work (work (1) above) is completed.

Thereafter, tires with grains after (N+2) are continuously produced in the same manner.

The radial tire manufacturing apparatus and device of the present invention are as described above.
(1) Work on the inner liner layer (IL) and carcass ply (CP), which are particularly important in terms of tire structure, is carried out using a flat cylindrical drum.

(a) It is possible to uniformly increase the amount of curve at the joint of each part in the axial direction of each phase material.

(b) Work is easy and quality can be maintained constant.

→ You can work quickly and increase productivity.

2) Automatic molding of carcass span (OB) and easy combination with equipment.

Wrapping, cutting, and bonding of site wrinkles, cushion rubber, etc. can be carried out in addition to the band forming work described in 1. This reduces the production time per tire and improves tire productivity. Since the crotch part of the B1 core can be performed automatically, it is possible to save labor.

lv) Since the band structure and bead core can be integrated in advance before assembling the sidewalls and cushion rubber, which takes a long time, the production cycle time can be shortened.

The present invention has been described below with reference to two embodiments, but of course the present invention is not limited to these embodiments, and various modifications may be made to the design without departing from the spirit of the present invention. It is.

[Brief explanation of drawings]

v, Figure 1 is a plan view showing a conventional radial tire manufacturing apparatus, ill! Figure 2 (a) (1)) is an explanatory diagram of its action,
Fig. 6 is a plan view of an embodiment of the radial tire manufacturing apparatus according to the present invention, and Fig. 4 shows the bead core at the first position outside the apparatus being transferred to the holding device on the carrier waiting at the second position. FIG. 5 is a side view of the conveying bead 9 supply device; FIG. 5 is a detailed explanatory view of the band and bead core assembly conveying carrier; FIG.
FIG. 7 is an explanatory view of the operation of the present invention. +dl...Green carcass forming drum, (k)...
... Carcass band forming drum, (0) ... Carcass band transport carrier, (0-I Xo-2) ...
Bead core supply device, (pl... Bead core supply device. Sub-agent: Patent attorney Ichi Okamoto, and 2 other people. C (1) in Figure 1, No. 2)

Claims (2)

[Claims] (1) A bead core is coaxially arranged outside a carcass band assembled in advance into a cylindrical shape, the diameter of the band is expanded, and the band and the lower part of the bead core are pressed into contact with each other, or the band structure is constructed without performing pressure contact with the lower part of the bead core. After that, these are pre-assembled into a cylindrical side wall. The diameter of the structure is expanded and the oil-cooled band structure is transferred coaxially to the outside of the structure consisting of a bead frame. Perform pressure welding
Next, while making the space between both bead cores into a toroidal shape, the band structure at the outer end of both bead cores is folded back and crimped to the toroidal-shaped mend structure so as to wrap around the 9 bead cores, and the band structure is attached to the outer circumferential part of the toroidal-shaped band structure. A method for manufacturing a radial tire, which comprises assembling a pre-assembled annular belt/tread structure to complete a raw radial tire. (2) A carcass band forming drum, a green carcass forming ram that coaxially faces the carcass band forming drum and makes the carcass band into a toroidal shape, and a reciprocating movement between the two drums. A bead core and carcass band transport carrier having a pair of bead/p core holding devices that are movably arranged and coaxial with the axis, and a bead core prepared outside the axis are gripped from inside. A radial tire manufacturing apparatus comprising: a bead core supplying device that holds the gripped bead cores in a vertical state while being transferred to the bead core holding device.