JPH11268150A - Mechanism turnup method by band transfer device and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable increasing of the degree of freedom in a turnup with a slight variation during turning-up time, and enhancing the working efficiency without setups and changeover, and further, simplifying the structure to save a manufacturing cost. SOLUTION: This band transfer device 3 comprises a right and a left paired band transfer 3a, 3b which are structurally movable on the same axial line as a band molding drum in such a way that the transfers 3a, 3b can get close to and separate from each other. In addition, the device 3 is of such a construction that bands, consisting of cylindrical members, which are molded on the band forming drum can be retained by an expandable and contractable cylindrical retaining part 7. The retaining part 7 is equipped with a band retaining mechanism and a pair of a right and a left bead retaining device 8a, 8b which are able to get close to and separate from each other, backward of the band retaining mechanism. Further, a pair of a right and a left supporting-conveying mean 9a, 9b are arranged outside the devices 8a, 8b in such a manner that the means 9a, 9b are approachable to and separable from each other. The paired right and left bead retaining devices 8a, 8b are composed of a semiarc- shaped retainer mechanism with a suction means for sucking-retaining beads having fillers respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanical turn-up method and a mechanical turn-up method using a band transfer device used in a tire molding process. More specifically, the present invention relates to a method for controlling a turn-up trajectory in a tire shaping process. The present invention relates to a mechanical turn-up method using a band transfer device capable of reducing variations and improving workability and productivity, and a device therefor.

[0002]

2. Description of the Related Art Conventionally, a pair of beads with fillers are fitted on both ends of a cylindrical member made of a carcass material previously formed on a band forming drum in a tire forming process, and the cylindrical member is formed in a tire shaping process. When wrapping up both ends of a bead with a filler and crimping it (generally called a turn-up), a turn-up method in which high-pressure air is introduced into a rubber bag called a bladder to inflate and roll up Is being done.

[0003]

However, as described above, the method of using the turn-up bladder involves introducing high-pressure air into a rubber bag called a bladder and inflating the rubber bag so that the upper surface of both ends of the cylindrical member is inflated. Since this method is to press the bead with the filler together, there is a lot of variation due to the rise of both ends of the cylindrical member at the time of turn-up, and the mechanism becomes complicated to incorporate the bladder into the shaping molding drum. Accordingly, there were problems such as an increase in cost of the shaping molding drum and poor workability during setup change.

[0004] An object of the present invention is to provide a bead holding device provided in a band transfer mechanism and a supporting and conveying means.
By performing mechanical turn-up at both ends of the cylindrical member in the tire shaping process, variation at the time of turn-up is reduced, the degree of freedom of turn-up can be increased, and work efficiency is eliminated without setup change work It is another object of the present invention to provide a mechanical turn-up method using a band transfer device and a device therefor that can achieve a simple structure and cost reduction.

[0005]

In order to achieve the above object, the present invention provides a mechanical turn-up device comprising a pair of right and left bead holding devices which can be approached and separated from each other on the same axis. A pair of left and right support / transporting means capable of approaching / separating from each other is provided, and the pair of left / right bead holding devices is constituted by a ring-shaped holding mechanism having suction means for sucking and holding a bead with a filler; A pair of left and right supporting and transporting means, a plurality of fork members provided with turn-up rollers at their ends for holding the insides of both ends of a cylindrical member formed by integrally pressing a bead with a filler; And an expansion / contraction operation mechanism for simultaneously performing an expansion / contraction operation in the radial direction.

According to the mechanical turn-up method of the present invention, a bead with a filler held by a pair of left and right bead holding devices is disposed on both ends of a cylindrical member preformed on a band forming drum. By expanding the diameter of the band forming drum, the upper surface of both ends of the cylindrical member and the bead with the filler are integrally pressed together, and a plurality of supports each having a turn-up roller at the tip inside both ends of the cylindrical member. While inserting and supporting the conveying means, the cylindrical member pressed with the beads by this supporting and conveying means is conveyed to a shaping process, and after the bead portion is gripped and fixed, the bead interval is reduced and the cylindrical member is closed. A pressurized gas is supplied inside to form a toroidal shape, and at the same time, the plurality of supporting and conveying means are expanded to a center and moved toward the center of the formed body. It is an gist crimping while folded back and along the opposite ends of the molded body into a toroidal shape by the turn nap roller.

The present invention is constructed as described above, and a bead with a filler is disposed on both ends of a cylindrical member formed in advance on a band forming drum and pressed integrally, and this cylindrical member is pressed. While shaping into a toroidal shape in the shaping process, expand the diameter of a plurality of supporting and conveying means, and move to the center side of the molded body while turning both ends of the molded body along the toroidal shape with a turn-up roller and crimping Therefore, variation at the time of turn-up is small, and the degree of freedom of the turn-up can be increased,
There is no setup change work, so that the working efficiency can be increased, and the structure is simple and the cost can be reduced.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic configuration diagram of an entire tire forming apparatus embodying the present invention, and 1 is a band forming machine for forming a band W composed of an inner liner, a carcass ply, a sidewall, and the like as a tire constituent material. Is a belt forming machine for forming a belt laminate in which a tread is laminated on a formed belt, 3 is a band transfer device for transferring a band W formed by the band forming machine 1, and 4 is a band forming device for forming a belt W Reference numeral 5 denotes a belt transfer device for transferring the belt laminate, and a shaping molding machine for shaping the band W formed into a tubular shape by the band molding machine 1 in a toroidal shape.

The above-mentioned band transfer device 3 is shown in FIG.
As shown in FIG. 6, a pair of left and right band transfer members 3a and 3b which can move on the same axis X as the band forming drum 6 and can approach and separate from each other, and are formed on the band forming drum 6 in a cylindrical shape. Band W composed of members
Is configured to be held by a cylindrical holding portion 7 that expands and contracts.

As shown in FIGS. 3 and 4, the holding portion 7 has a mechanism for holding the band W, a pair of left and right bead holding devices 8a and 8b which can be approached and separated from each other, and further provided on the outside thereof. A pair of left and right supporting and conveying means 9 that can approach and separate from each other
a and 9b are provided, and the left and right pair of bead holding devices 8a and 8b are provided with a suction means 10 for sucking and holding a bead Q with a filler as shown in FIGS. It is constituted by an arc-shaped holding mechanism 11.

The pair of right and left bead holding devices 8a and 8b
A pair of left and right support frames 19a and 19b that slide on the base frame 17 in the left and right direction along the guide rails 18.
The support frames 19a and 19b are provided on the left and right screw shafts 2 which are horizontally installed below the base frame 17.
0 is screwed through a nut 21, and the left and right screw shafts 20 are connected to a rotary drive motor via a gear mechanism (not shown). Therefore, the left and right screw shafts 20 are rotated via the rotary drive motor.
When the is rotated, the support frames 19a and 19b approach and separate in the left-right direction via the nut 21.

The pair of left and right support frames 19a, 19
b, a holding mechanism 11 composed of a semicircular plate whose position can be adjusted in the vertical direction is attached.
The holding means 11 composed of a semi-circular plate is finely adjusted in the vertical direction via a position adjusting means 22. It is configured.

As shown in FIGS. 3, 4 and 7 to 9, a pair of left and right supporting / transporting means 9a and 9b which can be approached and separated from each other are provided on a guide rail 18 on the base frame 17.
Pair of left and right support frames 2 sliding in the left and right direction along
3a and 23b are erected, and the support frames 23a and 2b
3b is screwed via a nut 25 to a left and right screw shaft 24 horizontally installed below the base frame 17, and the left and right screw shaft 24 is connected to a rotary drive motor via a gear mechanism 26 (not shown). . Therefore, when the left and right screw shafts 24 are rotated via the rotation drive motor, the support frame 23 is rotated.
a and 23b approach and separate in the left-right direction via the nut 25.

A rotatable ring-shaped rotary plate 16 is attached to the support frames 23a and 23b. The rotary plate 16 has a plurality of cam grooves 15 formed in the radial direction of the side surface.
A guide roller 13 slidable along the cam groove 15 and made of a smooth surface-treated member; and a roller support plate 32 supported by the guide roller 13.
And an expansion / contraction operation mechanism 14 including a plurality of fork members 30 each having a turn-up roller 31 at the end thereof.

The fork member 30 provided with the turn-up roller 31 is formed in an L-shape so as to hold both ends of a band W formed of a cylindrical member to which a bead Q with a filler is integrally pressed, By rotating the rotary plate 16, the fork member 30 can be simultaneously expanded and contracted in the radial direction.

Next, a mechanical turn-up method using a band transfer device will be described with reference to FIGS. First, as shown in FIG. 10A, the left and right ends of a band W composed of a cylindrical member constituted by an inner liner P1, a carcass P2, and a side wall P3 formed in advance on a band forming drum 6 are placed. A bead with a filler Q held by a pair of bead holding devices 8a and 8b is provided, and the band forming drum 6 is expanded in diameter to integrally form the upper surfaces of both ends of the cylindrical member W and the bead Q with a filler. Crimp.

Next, inside the both ends of the cylindrical member W,
As shown in FIG. 10 (b), a plurality of support / conveyance means 9a, 9b (fork member 30) having a guide member 12 such as a roller at the tip are inserted and supported, and the band transfer device 3 (support / conveyance) is used. The cylindrical member W to which the beads Q have been pressed by means 9a, 9b) is transported to a shaping step (shaping molding machine 5).

In this shaping step, FIG.
As shown in (c), the bead portion Q is gripped and fixed (bead lock), the cylindrical member W (band) is shaped by introducing a pressurized gas, and at the same time, the cylindrical member W Is formed into a toroidal shape (FIG. 10D). Next, as shown in FIG. 10 (e), the diameter of the plurality of support / conveying means 9a, 9b (fork member 30) is expanded via the expansion / contraction operation mechanism 14, and while moving toward the center of the molded body Wx. The two ends of the formed body Wx are press-bonded by the turn-up roller 31 while being turned along the toroidal shape (FIG. 10F).

As described above, both ends of the cylindrical member W are mechanically turned up without using a conventional bladder, and the upper surfaces of both ends of the cylindrical member W and the beads Q with filler are integrated. Since pressure bonding is performed, variation during turn-up is small, the degree of freedom in turn-up can be increased, work efficiency can be increased without setup change work, and the structure is simple and cost reduction is achieved. Can be.

FIGS. 11 and 12 show a plurality of supporting / conveying means 9a and 9b (fork member 30).
In the case of expanding the diameter of the tire via the fork member 30, another embodiment in which the movement trajectory of the turn-up by the fork member 30 can be set arbitrarily is shown. By setting the movement locus of the turn-up by the fork member 30 arbitrarily, the degree of freedom of the turn-up can be increased.

[0021]

According to the present invention, the mechanical turn-up of both ends of the cylindrical member is performed in the tire shaping process by the bead holding device and the supporting and conveying means provided in the band transfer mechanism as described above. There is little variation during napping, which makes it possible to increase the molding accuracy of tires, increase the degree of freedom in turn-up, and increase work efficiency without setup change work. There is an effect that can be achieved.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an entire tire molding apparatus embodying the present invention.

FIG. 2 is an enlarged plan view of the band transfer device.

FIG. 3 is a front view of a bead holding device and a supporting and conveying means of the band transfer device.

FIG. 4 is a side view of FIG. 3;

FIG. 5 is a partially enlarged side view of the bead holding device.

FIG. 6 is a front view of FIG. 5;

FIG. 7 is a front view of a fork member of the supporting and conveying means.

FIG. 8 is a partially enlarged front view of a rotating plate of the support and transport means.

FIG. 9 is a partially enlarged front view of an expansion / contraction operation mechanism of the support / conveyance means.

FIGS. 10A to 10F are explanatory views showing steps of a mechanical turn-up method according to the present invention.

FIG. 11 is an explanatory view showing another embodiment of the mechanical turn-up method.

FIG. 12 is an explanatory view showing another embodiment of the mechanical turn-up method.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 band forming machine 2 belt forming machine 3 band transfer device 4 belt transfer device 5 shaping forming machine 6 band forming drum 7 holding unit 8 a, 8 b bead holding device 9 a, 9 b support / transportation means 10 suction means 11 holding mechanism 13 guide roller 14 enlargement / reduction Operating mechanism 15 Cam groove 16 Rotating plate 17 Base frame 18 Guide rail 19a, 19b Support frame 20 Left and right screw shaft 21 Nut 22 Position adjusting means 23a, 23b Support frame 24 Left and right screw shaft 25 Nut 26 Gear mechanism 30 Fork member 31 Turn-up roller 32 Roller support plate W Band (cylindrical member) Q Bead with filler Wx Molded product P1 Inner liner P2 Carcass P3 Side wall

Claims (5)

[Claims] A bead with a filler held by a pair of left and right bead holders is disposed on both ends of a cylindrical member preformed on the band forming drum, and the band forming drum is expanded in diameter. The upper surface of both ends of the cylindrical member and the bead with the filler are integrally pressed together, and inside the both ends of the cylindrical member, a plurality of supporting and conveying means having a turn-up roller at the tip are inserted and supported. By transporting the cylindrical member to which the bead has been pressed by this supporting and transporting means to a shaping step, gripping and fixing the bead portion, and supplying a pressurized gas into the cylindrical member while shortening the bead interval. It is formed into a toroidal shape, and at the same time, both ends of the molded body are torroized by a turn-up roller while expanding the diameter of the plurality of supporting and transporting means and moving to the center side of the molded body. A mechanical turn-up method using a band transfer device that crimps while folding along the idal shape. 2. A pair of left and right band transfer devices configured to be movable on the same axis as the band forming drum and to be able to approach and separate from each other. And a pair of left and right support / transporting means which can be approached and separated from the outside thereof, and the pair of right and left bead holding devices has a ring-shaped holding mechanism provided with suction means for sucking and holding beads with filler. The pair of right and left support / transport means, which can be approached and separated from each other, is provided with a plurality of forks provided with turn-up rollers at their ends for holding the inside of both ends of a cylindrical member obtained by integrally pressing a bead with a filler. A mechanical transfer mechanism comprising a band transfer device comprising a member and an expansion / contraction operation mechanism for simultaneously enlarging / reducing the fork member in the radial direction. Flop arrangement. 3. The mechanical turn-up device according to claim 1, wherein the suction means for sucking and holding the bead with the filler is a magnetic material disposed at predetermined intervals on a side surface of the disk. 4. The mechanical turn-up device according to claim 2, wherein the turn-up roller provided at the tip of the fork member is a member that is rotatable and has a smooth surface. 5. The expansion / contraction operation member comprises a rotary plate having a plurality of cam grooves formed in a side surface radial direction, and a guide roller provided on a fork member which moves by engaging with the cam grooves. A mechanical turn-up device using the band transfer device according to 2, 3, or 4.