JPH06270288A - Apparatus for holding and transferring raw tire intermediate product - Google Patents

Abstract

PURPOSE:To provide an apparatus which can hold and transfer a toroidal raw tire intermediate product with bead parts formed on both insides while keeping its form accurately. CONSTITUTION:An apparatus comprises a periphery holder 8 for holding the outside of a raw tire intermediate product, a pair of bead holders 9 which are placed on both sides of the holder 8 and hold the bead parts of the intermediate product, and a bead holder driving mechanism 16 which moves the bead holders 9 symmetrically to the holder 8 so that they come close to each other or separate from each other. The periphery holder 8 and the bead holders 9 are respectively composed of more than one holding segment 11, 11..., 13, 13,..., which is arranged along the circumference at equal intervals and is movable radially, and holding segment extending-contracting mechanisms 29, 44 which extend or contract these holding segments by moving them radially.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a raw tire semi-finished product holding and carrying device used for holding a semi-finished product during molding and carrying it to the next step in molding a raw tire in tire manufacturing.

[0002]

2. Description of the Related Art An automobile tire is generally formed by forming a toroidal carcass ply with an inner liner on the inner surface of the tire, covering the outer peripheral portion of the carcass ply with a belt and a tread, and covering both side surfaces with side rubber. It is manufactured by molding a configured raw tire and vulcanizing the raw tire.

Molding of a green tire is carried out on various drum-shaped molding formers, and includes a step of transferring a semi-finished product molded on one molding former to the next molding former. At this time, a holding and conveying device for holding the semi-finished product and transferring it to the next forming former is used. Conventionally, when the semi-finished product formed in the toroidal shape is transferred, the outer peripheral surface of the semi-finished product is used. It was general to use a holding and conveying device for holding the.

[0004]

[Problems to be Solved] However, for example, a raw tire semi-finished product in which the belt and tread are simply attached to the outer peripheral surface portion of the carcass ply and the side rubber is not yet attached to both side surfaces is used as described above. If the semi-finished product has a weak bead portion, it will be difficult to mount it accurately on the next forming former, resulting in poor positioning. Easily, resulting in deterioration of tire quality.

[0005]

The present invention has been made in view of such circumstances, and according to the present invention, a raw tire semi-finished product having a toroidal shape and bead portions formed on both sides of the inner peripheral portion. In a device for holding and conveying the raw tire semi-finished product, a pair of beads holding the outer peripheral surface of the raw tire semi-finished product and the bead portions of the raw tire semi-finished product located on both sides of the outer circumferential support, respectively. Part holder and bead part holders on both sides are symmetrically close to each other with respect to the outer peripheral holder,
And a bead portion holder, each of which is composed of a bead portion holder driving mechanism to be separated from each other, and a plurality of radially movable holding segments arranged at substantially equal intervals in the circumferential direction, respectively. A holding / conveying device for a raw tire semi-finished product is provided, which comprises a holding segment expansion / contraction mechanism for moving and expanding and contracting these holding segments in the radial direction.

[0006]

[Operation] The operation of the holding and conveying device will be described with reference to FIG. In the figure, A is a molding former, which is provided with a bead lock ring B that can be expanded and contracted. C is a raw tire semi-finished product molded on the molding former A, and is formed by integrally bonding the tread F to the outer peripheral portion of the carcass ply D via the belt E. A bead portion H on which a bead wire G is set is formed at both ends of the carcass ply D. The raw tire semi-finished product C is formed by supporting the bead portion H by a bead lock ring B having an expanded diameter and expanding and deforming it into a toroidal shape by applying pressure p from the inside.

(A) shows the holding segments provided on the outer peripheral holding body of the device of the present invention, and (b) and (c) show the holding segments provided on the bead portion holding bodies on both sides.

When the semi-finished product C is removed from the molding former A and is transferred to the next molding former, first, as shown in (a), the entire holding device (a),
The (B) and (C) are moved along the axis of the molding former A to a position where the outer peripheral portion of the semi-finished product C is surrounded.

Next, as shown in (b), the holding segment (a) is reduced in diameter by the expansion / contraction mechanism to hold the outer peripheral surface of the semi-finished product C, and at the same time, to hold the holding segments (b) and (c). The expansion / contraction mechanism reduces the diameter to a position facing the bead portion H. After that, the bead portion holders on both sides are brought closer to each other by the bead portion holder driving mechanism, and the bead portion H is sandwiched and held by the holding segments (b) and (c). Holding segment (b),
It is desirable to arrange a magnet for attracting the bead wire G on the surface of (C) that contacts the bead portion H.

In this way, the outer peripheral surface of the semi-finished product C is held by the holding segment (a) and the bead portions H on both sides are held by the holding segments (b) and (c), respectively, and then (C).
As shown in, the bead lock ring B is reduced in diameter to release the semi-finished product C from the forming former A, and then the entire holding and conveying device is moved in the axial direction of the forming former A to form the semi-finished product C in the next forming process. Transport it to the former.

Since the semi-finished product C is conveyed not only on the outer peripheral surface but also on the bead portions on both sides of the semi-finished product, the bead portion is not deformed at the time of conveyance and at the time of mounting on the next molding former, and accordingly, the bead portion is not deformed. It can be accurately positioned and mounted on the next molding former.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in FIGS.

2 and 3 are drawings showing the entire structure of the holding and conveying apparatus 1 according to the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a longitudinal side view thereof. This holding and conveying device 1 is
It is supported on a bed 3 provided on the substrate 2 so as to be able to travel in the left-right direction (the left-right direction in FIG. 3, the same applies below) by being guided by rails 4 on the bed 3, and is erected on the substrate 2. It travels by being driven by a cylinder device 6 arranged between the mounting member 5 and the bottom plate 7 of the device 1.

As shown in FIG. 3, the holding / conveying device 1 has a peripheral tire holder 8 for holding the outer peripheral surface of the raw tire semi-finished product C (FIG. 1). The bead portion holders 9 for holding the bead portions H are arranged side by side.

The outer peripheral holding member 8 is constructed by mounting an outer peripheral holding segment 11 corresponding to (a) in FIG. 1 on an annular support frame 10 having a circular opening 10a. A plurality (11 in this embodiment) of outer peripheral holding segments 11 are arranged at equal intervals along the opening 10a. Similarly, each of the left and right bead portion holders 9 has a circular opening 1
The bead portion holding segment 13 corresponding to (b) and (c) of FIG.
It is configured by wearing. Bead holding segment 1
A plurality of (3 in this embodiment) 3 are arranged at equal intervals along the opening 12a.

The opening 10a and the openings 1 on both sides thereof.
2a is aligned in the left-right direction, and these openings 10a,
A cylindrical opening 14 penetrating the holding and transporting device 1 to the left and right is formed by 12a. This opening 14 is located on the same axis as the above-mentioned forming former A, and when the raw tire semi-finished product C on the former A is held and conveyed, the holding / conveying device 1 is entirely opened by the cylinder device 6. The raw tire semi-finished product C is stored in the opening 14 along with the forming former A along the rail 4 parallel to the axis of the portion 14 and inside the opening 14.

The support frame 10 of the outer peripheral holder 8 is the bottom plate 7.
The support frame 12 of each beat portion holder 9 is supported on a rail 15 provided on the bottom plate 7 so as to be movable along the rail. Each of the support frames 12 is driven by the bead portion holder drive mechanism 16 and moves on the rail 15 so as to approach and separate from each other, and always occupies a symmetrical position with respect to the support frame 10 of the outer periphery holder 8. The bead portion holder driving mechanism 16 is screwed with the left and right support frames 12 and penetrates them.
7 and a motor 18 for driving the screw shaft 17 to rotate, and the screw shaft 17 has screws 19 with opposite pitches in opposite directions.
a and 19b are cut on the left and right sides, respectively (FIG. 3). Then, the left support frame 1 is attached to the left screw 19a.
2 are screwed together, and the right side support frame 1 is attached to the right side screw 19b.
Since the two are screwed together, the left and right support frames 12 move in the opposite direction by the same distance in accordance with the rotation of the screw shaft 17, that is, move toward or away from each other.

The rotation of the screw shaft 17 is transmitted to the encoder 20 (FIG. 2), and a signal according to the rotation angle of the screw shaft 17, that is, the moving distance of the support frame 12 is obtained from the encoder 20. By controlling, the moving distance of the support frame 12, that is, the width between the left and right support frames 12 can be set precisely.

Next, the detailed structure of the outer peripheral holder 8 will be described with reference to FIGS. FIG. 4 is a partial front view showing, in an enlarged manner, the vicinity of the outer circumference holding segment 11 shown at the center and the uppermost part of the outer circumference holding body 8 in FIG. 2, and FIG. A sectional view taken along the line, FIG. 6 shows the same VI.
It is sectional drawing which follows the VI line.

The outer circumference holding segment 11 is the support frame 1.
Left and right side plates 11a, 11b along both sides of 0 and side plates 11a, 11 straddling the opening 10a of the support frame 10.
The holding plate 11c connects the inner ends of b. A pair of rail part pieces 21 are respectively provided on both side surfaces of the support frame 10 so as to extend in a radial direction in parallel with each other, and each slide part piece 22 fixed to the inner side surfaces of the side plates 11a and 11b of the outer peripheral holding segment 11. Are slidably engaged with these rail pieces 21. Therefore, the outer peripheral holding segment 11 is guided by the rail portion 21 and can slide in the radial direction. The left and right side plates 11a and 11b are connected to each other by a connecting shaft 23. Although the connecting shaft 23 penetrates the support frame 10, the connecting shaft 23 is provided on the side plate 11 in the supporting frame 10.
A slot 24 (Fig. 6) that is long in the radial direction is provided so that it can be moved in the radial direction together with a and 11b.
3 penetrates this groove hole 24.

An annular space 25 is provided inside the support frame 10 so as to surround the opening 10a coaxially therewith.
An annular rotation ring 26 is housed in the surrounding space 25 so as to be rotatable along the space. The rotary ring 26 has arcuate guide holes 2 extending obliquely in the circumferential direction from one end 27a on the radially inner side to the other end 27b on the radially outer side at a position corresponding to each outer circumference holding segment 11.
7 is provided, and the connecting shaft 23 has a guide hole 27.
And is engaged with the guide hole 27 through a roller 28 which is freely rotatable.

When the connecting shaft 23 is located at the outer end of the guide hole 27 in the radial direction, the outer circumference holding segment 11 has a shape shown in FIG.
As indicated by the solid line, the circumference that occupies the outermost position in the radial direction and that connects the holding plates 11c of each outer circumference holding segment 11 is in the expanded state. This corresponds to (a) in FIG. When the rotating ring 26 is rotated in the direction of arrow a from this state, the guide hole 27 also moves in the same direction.
The rotation of arrow 1 in the direction of arrow a is caused by the rail piece 21 and the sliding piece 22.
Since the outer peripheral holding segment 11 is guided by the guide hole 27 via the connecting shaft 23, it moves radially inward along the rail piece 21 as shown in FIG.
When the connecting shaft 23 reaches the radially inner end portion 27a of the guide hole 27, the outer circumference holding segment 11 occupies the radially innermost position as shown by the two-dot chain line in FIG. The circumference formed by the plate 11C is in a reduced diameter state. This corresponds to (b) and (c) of FIG.
The outer peripheral surface of the raw tire semi-finished product C is held by the holding plate 11c of the outer diameter holding segment 11 having a reduced diameter.

The rotating operation of the rotating ring 26 is performed by the expansion / contraction mechanism 29 shown in FIG. The expansion / contraction mechanism 29 includes a cylinder device 32 provided between a stationary bracket 30 fixed to the support frame 10 and a movable bracket 31 fixed to the rotating ring 26.
The expansion and contraction of 2 rotates the rotation ring 26 to expand and contract the outer circumference holding segment 11.

Next, the detailed structure of the bead portion holder 9 will be described with reference to FIGS. 7 is an enlarged view of a part of the bead portion holder 9 shown in FIG. 2, FIG. 8 is a sectional view taken along the line VIII-VIII of FIG. 7, and FIG. 9 is the same IX-IX. FIG. 9 is a cross-sectional view taken along the line.
FIG. 4 is an external view of FIG.

Roller shafts 33 project from the outer surface of the support frame 12 at the ends of two diameters orthogonal to each other (FIG. 8).
4 is rotatably supported. A guide ring 35 is fitted on the inner peripheral side surrounded by these rollers 34 and is rotatably supported by the rollers 34 (see FIG. 2).

The bead portion holding segment 13 has a segment portion 36 extending in the circumferential direction with a curvature larger than that of the opening 12a on the inner peripheral side of the opening 12a (FIG. 9) of the support frame 12, and a support portion 37 extending in the radial direction. The support frame 12 of the support portion 37 is formed integrally with the inner end portion of the
A guide rail 38 is fixedly provided on the side surface on the side. The guide rail 38 also extends in the radial direction and projects further outward than the support portion 37. A guide block 39 slidably engaged with the guide rail 38 is fixed to the support frame 12, and the bead portion holding segment 13 is guided by the guide block 39 via the guide rail 38 and can move in the radial direction. .

On the side surface of the support portion 37 on the guide ring 35 side, there is integrally provided a guide member 40 having one end radially inward and the other end radially outward and inclined with respect to the circumferential direction. A guide groove 41 extending in the longitudinal direction is formed in the guide member 40 along the guide member 40. A guide pin 42 provided on the guide ring 35 is provided in the guide groove 41.
Are engaged via a rotatable roller 43.

When the guide pin 42 is engaged with the radially inner end of the guide groove 41, the bead holding segment 13 is at the radially outermost position as shown by the solid line in FIG. It When the guide ring 35 rotates in the direction of arrow b from this state, the bead portion holding segment 13 is guided by the guide rail 38 due to the engagement relationship between the guide pin 42 and the guide groove 41.
When the guide pin 42 reaches the radially outer end of the guide groove 41 while being guided (reduced in diameter) in the radial direction while being guided by the guide block 39 through the guide block 39, it is indicated by a chain double-dashed line in FIG. Occupies the innermost position. Then, the segment portions 36 of the four bead holding segmet 13 arranged at equal intervals on the support frame 12 are assembled with each other to form a raw tire semi-finished product C.
A substantially continuous circle having a diameter equal to the diameter of the bead portion H is formed (see FIG. 1B).

In the expansion / contraction operation of the bead portion holding segment 13 described above, the guide ring 3 is moved by the expansion / contraction mechanism 44 shown in FIG.
It is carried out by rotating with 5. The expansion / contraction mechanism 44 connects one end to the support frame 12 and the other end to the guide ring 35.
The cylinder device 45 is connected to the cylinder device 45, and the guide ring 35 is rotated by the expansion and contraction of the cylinder device 45.

After the diameter of the segment portion 36 of each bead portion holding segment 13 is reduced to the position of the bead portion H of the raw tire semi-finished product C as described above, the bead portion holder drive mechanism 16 is operated to move the left and right sides. Beat part holders 9 on both sides
The supporting frames 12 are moved toward each other until the segment portion 36 of each bead portion holding segment 13 comes into contact with the bead portion H of the raw tire semi-finished product C.

A large number of magnets 46 are arranged on the end surface of the segment portion 36 facing the bead portion H, and the magnet 46 attracts the bead wire G embedded in the bead portion H, so that the bead portion H is separated from the segment portion 36. Securely held by 36. Further, the movement amount of each support frame 12 is precisely set by controlling the motor 18 by a signal from the encoder 20, so that the bead portion H does not deform due to contact with the segment portion 36.

Since the holding / conveying apparatus 1 is constructed as described above, it operates as described above with reference to FIG.

[0033]

According to the present invention, since the raw tire semi-finished product is conveyed not only on the outer peripheral surface but also on the bead portions on both sides, it is possible to prevent the bead portion from being conveyed and attached to the next molding former. It does not deform and can be accurately positioned and mounted on the next forming former, improving the quality of the product tire.

[Brief description of drawings]

FIG. 1 is a schematic view for explaining the operation of the device of the present invention.

FIG. 2 is a raw tire semi-finished product according to an embodiment of the present invention,
It is the whole front view of a conveying apparatus.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a partial front view of an outer peripheral holder.

5 is a cross-sectional view taken along the line VV of FIG.

6 is a sectional view taken along line VI-VI in FIG.

FIG. 7 is a partial front view of a bead portion holder.

8 is a cross-sectional view taken along the line VIII-VIII of FIG.

9 is a sectional view taken along line IX-IX in FIG.

10 is an external view of FIG. 9 viewed in the direction of arrow X. FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Holding / conveying device, 2 ... Substrate, 3 ... Bed, 4 ... Rail, 5 ... Mounting member, 6 ... Cylinder device, 7 ... Bottom plate, 8 ...
Peripheral holder, 9 ... Bead holder, 10 ... Support frame,
11 ... Perimeter holding segment, 12 ... Support frame, 13 ... Bead holding segment, 14 ... Opening, 15 ... Rail, 16 ... Bead holding mechanism, 17 ... Screw shaft, 18 ... Motor, 19 ...
Screw, 20 ... Encoder, 21 ... Rail piece, 22 ... Sliding piece, 23 ... Connecting shaft, 24 ... Groove hole, 25 ... Annular space, 26 ... Rotating ring, 27 ... Guide hole, 28 ... Roller, 29 ... Expansion / contraction mechanism, 30 ...
Stationary bracket, 31 ... Movable bracket, 32 ... Cylinder device, 33 ... Roller shaft, 34 ... Roller, 35 ... Guide ring, 36
… Segment part, 37… Support part, 38… Guide rail, 39
… Guide block, 40… Guide member, 41… Guide groove, 42…
Guide pin, 43 ... Roller, 44 ... Expansion / contraction mechanism, 45 ... Cylinder device, 46 ... Magnet

Claims (1)

[Claims] 1. An apparatus for holding and conveying a raw tire semi-finished product having a toroidal shape and bead portions formed on both sides of the inner circumferential portion, and an outer peripheral holding body for holding an outer peripheral surface of the raw tire semi-finished product, and the outer peripheral holding. A pair of bead portion holders, which are respectively located on both sides of the body and hold the bead portion of the raw semi-finished product, and bead portion holders on both sides are symmetrically approached and separated from each other with respect to the outer peripheral holder. A bead portion holder driving mechanism, and each of the outer periphery holder and the bead portion holder has a plurality of radially movable holding segments arranged at substantially equal intervals in the circumferential direction, and a plurality of these holding segments. A holding / conveying device for a raw tire semi-finished product, comprising: a holding segment expansion / contraction mechanism for moving and expanding / contracting the holding segment in the radial direction.