JP2000296563A - Tire molding apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tire molding apparatus simplified in structure and enhanced in productivity. SOLUTION: A former 3 consisting of a first half former 1 and a second half former 2 divided in an axial direction is provided and the first and second half formers 1, 2 are attached to the inner ends 4a, 5a of first and second shafts 4, 5 provided so as to be relatively moved on the same axis P axially so that the inner ends 4a, 5a thereof can approach and separate mutually. Further, first and second turn-up bladders 6, 7 are provided to the first and second shafts 4, 5 and first and second bead setters 8, 9 are provided to both shafts 4, 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a tire molding apparatus.

[0002]

2. Description of the Related Art As a conventional tire molding apparatus, for example, as disclosed in Japanese Patent No. 1945262, an outer shaft fitted externally to an inner shaft supported in a cantilever shape, and an outer shaft attached to and attached to the inner shaft. A cylindrical sleeve capable of being approached to and separated from the shaft in the axial direction; and a plurality of side segments disposed in the outer shaft and the cylindrical sleeve in the circumferential direction, respectively. The one provided with a scalable former consisting of a plurality of center segments provided in the slab was widely used.

[0003]

However, in the former of the conventional tire forming apparatus, the cylindrical sleeve is moved toward and away from the outer shaft by a moving mechanism such as a motor or a ball screw, whereby the left and right side segments are mutually moved. Since the width of the former is adjusted by approaching / separating from the former, the structure becomes complicated and the whole apparatus becomes expensive. In addition, since the former has a structure provided on one shaft, there is a disadvantage that it takes time to attach the tire band to the former and to remove the former after molding.

Accordingly, an object of the present invention is to provide a tire molding apparatus whose structure is simplified and productivity is improved.

[0005]

In order to achieve the above-mentioned object, a tire forming apparatus according to the present invention comprises a first half former and a second half former which are divided in an axial direction. The first half-former
A second half former is attached to the inner end of a first shaft and a second shaft which are moved on the same axis and relatively in the axial direction so that their inner ends can approach and separate from each other. It is a thing.

[0006] Further, a former comprising a first half former and a second half former divided in an axial direction is provided, and the first half former and the second half former are arranged on the same axis. The first shaft and the second shaft are attached to the inner ends of a first shaft and a second shaft which are relatively axially moved so that their inner ends can approach and separate from each other.
First turn-up bladder and second turn-up bladder respectively provided on shaft
It comprises a turn-up bladder, and a first bead setter and a second bead setter provided on the first shaft and the second shaft, respectively.

Further, a first moving means and a second moving means for moving the first axis and the second axis in the axial direction, respectively, are provided.
The first axis and the second axis are moved in opposite directions by the moving means and the second moving means so that the first half-former and the second half-former approach and separate from each other.

[0008] Further, a positioning means capable of adjusting the length in the axial direction is provided, and when the first harformer and the second half former move closer to each other, a first stopper is provided on the stopper of the positioning means.
The first half former and the second half former are positioned at predetermined intervals by bringing the movable portions of the moving means and the second moving means into contact with each other.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing embodiments.

FIG. 1 shows an embodiment of a tire molding apparatus according to the present invention. In the present embodiment, the green tire 1st
1 illustrates a case of a tire molding apparatus used for molding. The tire forming apparatus includes a former 3 composed of a first half former 1 and a second half former 2 divided in an axial direction, and the first half former 1 and the second half former. 2, the inner ends 4a, 5a of the first shaft 4 and the second shaft 5 provided on the same axis P and relatively axially moved so that the inner ends 4a, 5a thereof can approach and separate from each other. 5a, and further provided on the first shaft 4 and the second shaft 5, respectively, the first turn-up bladder 6 and the second turn-up bladder 7 provided on the first shaft 4 and the second shaft 5, respectively. 1st bead setter 8 and 2nd
And a bead setter 9.

Further, the tire molding apparatus has a first moving means 10 for moving the first shaft 4 and the second shaft 5 in the respective axial directions.
A second moving means 11 is provided, and the first moving means 10 and the second moving means 11 move the first shaft 4 and the second shaft 5 in opposite directions to form the first half former 1 and the second half. Former 2
Are arranged to approach and separate from each other. That is, the tire forming apparatus of the present invention has a symmetrical configuration (structure) with respect to the tire forming center position Q indicated by the imaginary line.

More specifically, reference numeral 12 denotes a base which is long in the left-right axis direction, and guide rails 13, 13 are provided on the left and right ends of the upper surface of the base 12. Hereinafter, the device structure on the right side (first shaft 4 side) of the tire forming center position Q will be described.
A slide plate 14 slidably provided along 13;
A first shaft holding portion 15 provided on the upper surface on the outer end side of the slide plate 14 and holding the outer end 4b side (see FIG. 5) of the first shaft 4 in a horizontal cantilever shape; And a reciprocating cylinder 17 that slides the slide plate 14. The reciprocating cylinder
17 is provided on the lower surface side of the slide plate 14, and its main body 17a
Is fixed to the base 12, and the rod end is connected to the connecting member 71.
The first shaft holder 15 and the base 16 are reciprocated in the axial direction together with the slide plate 14 by the expansion and contraction operation.

As shown in FIGS. 2 and 5, the first shaft 4 has a central shaft portion 20 having two flow paths 18 and 19 through which a fluid such as air or oil passes, and a first shaft 4 is fitted around the central shaft portion 20. And the above-mentioned flow path 18,
A cylindrical shaft portion 23 having communication passages 21 and 22 each capable of communicating with 19;
And the communication flow passage which is externally fitted to the inner end of the cylindrical shaft portion 23 and
A mounting shaft portion 26 having communication flow paths 24 and 25 that can communicate with each other is provided with a simple structure having only a fluid supply route. An annular fixing member 34 is externally fitted at an axially intermediate position on the outer peripheral surface of the mounting shaft portion 26, and the communication flow path 24 communicating with one of the flow paths 18 is closer to the inner end than the fixing member 34. Of the mounting member 26, and the other flow path
The communication flow passage 25 communicating with 19 is opened on the outer peripheral surface of the mounting member 26 on the outer end side of the fixing member 34. Openings of the flow paths 18 and 19 are formed on the outer end surface of the central shaft portion 20, and a fluid supply unit (not shown) and each of the openings are connected to each other. An annular outer flange-shaped mounting plate 32 is fixed to the inner end surface of the mounting shaft 26.

Next, the first half former 1 is provided at the inner end of the mounting shaft portion 26 of the first shaft 4, is arranged at equal intervals in the circumferential direction, and has an expansion / contraction mechanism 27 (described later). , A plurality of segments 28 that move in the radial direction, and each segment
Arc-shaped plate 29… mounted on the radially outer end of 28…
And.

The expansion / contraction mechanism 27 is a cylindrical slide body which is slidably fitted on the mounting shaft 26 and has an empty space 35 formed with a predetermined gap from the outer peripheral surface of the mounting shaft 26.
30 and a plurality of link members 31 each having one end pivotally attached to the inner end of the slide body 30 and the other end pivotally attached to the segment 28.
And a U-shaped guided member 36 attached radially to the outer end surface of the mounting plate 32 at the inner end of the mounting shaft 26 at equal circumferential intervals and attached to the inner end side of each segment 28. And a plurality of guide members 33.

Further, the vacant space 35 of the slide body 30 of the expansion and contraction mechanism 27 is divided into an inner end vacant space 35a formed by a fixing member 34 on the outer periphery of the mounting shaft 26 and an outer end vacant space. The inner end side vacant part 35a is connected to the communication channel 24, and the outer end side vacant part 35b is connected to the communication channel 25. That is,
The fluid supplied from one of the flow paths 18 is pressed into the inner end side empty space 35a (as indicated by an arrow A in FIG. 3), so that the slide body 30 is slid toward the inner end 4a of the first shaft 4. Conversely, fluid is pressed into the outer end-side vacant space 35b (as indicated by the arrow B in FIG. 2) from the other flow passage 19, so that the fluid in the inner end-side vacant space 35a is forced into the one flow passage 18 (Discharged from the outside) to slide the slide body 30 to the outer end side.

As shown in FIGS. 2 and 4, in the case of the present embodiment, a plurality of segments 28 of the first half former 1 are provided at 12 at a central angle θ of 30 °. An arc-shaped plate 29 attached to each segment 28 ...
Is twelve. Also, these 12 arcuate plates 29 ...
Are six large plates 29a having a large circumferential width dimension,
Are composed of six small plates 29b having a small circumferential width, and large plates 29a and small plates 29b are alternately arranged in the circumferential direction. Further, a sloped surface portion formed on both end surfaces on the circumferential direction of the large plate 29a so that the outer surface 39 is formed at an acute angle.
37, 37, and a gradient surface portion 3 formed on both end surfaces in the circumferential direction of the small plate 29b so that the inner surface 40 side is formed at an acute angle.
It has 8,38.

FIG. 4 is an explanatory view showing the expanded state and the reduced state of the first half former 1. In the expanded state, the inclined surfaces 37, 37 of the adjacent large plates 29a and the small plate are small. The inclined surface portions 38, 38 of 29b come into contact with each other to form a circle as a whole (as viewed from the axial direction), but in order to reduce the diameter from this state, the adjacent large plate 29a and small plate 29b are mutually connected. Large plate 29a so as not to interfere with
And inclined surfaces 3 on both end surfaces on the circumferential direction of the small plate 29b.
7, 37, 38, 38, and the small plate 29b is the large plate 2
It can escape (move) to the inner diameter side than 9a (see FIG. 2).

Next, the mounting structure of the first turn-up bladder 6 will be described. As shown in FIG. 2, a mounting ring 42 having concave circumferential grooves 41 and 45 on the inner end surface and the outer end surface, respectively, is provided on the outer peripheral surface (large diameter portion) on the inner end side of the slide body 30. Insert the inner end 6a of the bladder 6 into the concave circumferential groove 41,
Further, by connecting the first holding ring 43 to the inner end surface of the mounting ring 42, the inner end 6a of the bladder 6 is held between the first holding ring 43 and the mounting ring 42. Further, the outer end 6b of the bladder 6 is inserted into the concave circumferential groove 45 of the mounting ring body 42, and the second pressing ring body 44 is inserted into the concave circumferential groove.
The outer end 6b of the bladder 6 is clamped and held by being fitted to the base 45.

An annular member 46 is attached to the outer peripheral surface of the outer end side of the slide body 30, and a cylindrical body 47 is externally fitted between the second pressing ring body 44 and the annular member 46. A gap 48 communicating with the inside of the first turn-up bladder 6 is formed between the slide body 30 and the cylindrical body 47. Note that a vent hole 49 for supplying and discharging a fluid is formed in a part of the annular member 46.

Returning to FIG. 1, the base 16 provided on the slide plate 14 has a guide rail 50 provided on the upper surface thereof in the axial direction, and a first bead slidable along the guide rail 50. A setter holding section 51 is provided. In addition, reciprocating cylinders 85,
85 (only one is shown in the figure) is held in the axial direction, and the rod ends of the cylinders 85, 85 are attached to the first bead setter holding section 51,
The first bead setter holding section 51
Is to slide. As shown in FIG. 5, the first bead setter holding portion 51 has a cylindrical casing 52 provided on the axis P and through which the first shaft 4 is inserted. Is provided.

Thus, the first bead setter 8 includes an annular wall portion 54 attached to the flange 53, an inner cylindrical wall portion 55 provided on the inner diameter side of the annular wall portion 54, and an annular wall portion 55. An outer cylinder wall portion 56 provided on the outer diameter side of the portion 54 and with a predetermined gap from the inner cylinder wall portion 55, and provided axially slidably between the inner cylinder wall portion 55 and the outer cylinder wall portion 56. Cylindrical slide part 57 and slide part
With an apex holding part 64 provided at the inner end of 57,
The slide portion 57 is provided along the outer peripheral surface of the inner cylindrical wall portion 55 and along the inner peripheral surface of the outer cylindrical wall portion 56 while being provided in an outer flange shape at the outer end of the cylindrical portion 58. Sliding annular partition wall
59 and has. Further, an inner flange wall portion 60 is provided at the inner end of the outer cylinder wall portion 56 so as to be in sliding contact with the outer peripheral surface of the cylindrical portion 58 of the slide portion 57, and an empty space is provided between the outer cylinder wall portion 56 and the inner cylinder wall portion 55. A part 61 is formed.

The vacant space 61 is formed by a partition wall 59 of the slide portion 57.
The inner space 61a and the outer space 61b are separated from each other. The outer cylinder wall 56 is formed with a communication hole 62 communicating with the inner end-side empty space 61a and a communication hole 63 communicating with the outer end-side empty room 61b. Is connected to a fluid supply unit (not shown).

The apex holding portion 64 is attached along the inner end of the cylindrical slide portion 57 and has a U-shaped cross section which opens to the inner diameter side, and a holding portion held by the holding portion 65. A member 66 is provided, and is slidable in the axial direction along the inner peripheral surface of a cylindrical member 67 attached to the inner end of the inner flange wall portion 60. That is, when the fluid is press-fitted into the outer end side vacant space portion 61b, the cylindrical slide portion 57 slides inward (inside end) of the shaft, and slides when the fluid is press-fitted into the inner end side vacant space portion 61. The part 57 slides outward from the shaft (outer end side). A finger portion 70 is provided inside the inner cylinder wall portion 55, and is held by a cylinder 68 and a guide mechanism 69 attached to the annular wall portion 54 so as to be able to reciprocate in the axial direction.

As shown in FIGS. 1 and 6, the tire molding apparatus of the present invention comprises a positioning means capable of adjusting the axial length.
72 is provided on the base 12. This positioning means 72
The first shaft 4 side and the second shaft 5 from the tire forming center position Q
It comprises a pair of unit bodies 73 provided on the side.

The unit body 73 on the first shaft 4 side will be described in detail. The unit body 73 is connected to a cylinder 74 having a main body 74a fixed on a mounting plate and a connection provided at the tip of a rod 74b of the cylinder 74. A plate 75, a guide block 76 provided on a mounting plate on the outer end side of the cylinder 74, and an inner end fixed to the connection plate 75 and an outer end side on the guide block 76.
A pair of upper and lower slide rods 77 slidably inserted through
77, a vertical plate-like stopper 78 attached to the outer ends of the pair of slide rods 77, 77, a stopper 78 and a guide block 76.
And a spacer body 79 having a predetermined thickness T, which is removably interposed between the first and second spacers.

A plurality of spacer bodies 79 having different thicknesses T are prepared, and an appropriate thickness is selected according to the type of tire to be manufactured. The spacer body 79
When mounting the cylinder, once drive the cylinder 74 to extend
The spacer 78 is separated from the guide block 76, the selected spacer body 79 is inserted between the stopper 78 and the guide block 76, the cylinder 74 is shortened and the stopper 78 is pulled back, and the spacer body 79 is separated by the stopper 78 and the guide block 76. And hold it. Thereby, the distance L from the tire forming center position Q to the outer end surface 78a of the stopper 78 can be adjusted with high accuracy.

By the way, the first connected to the slide plate 14
The connecting member 71 of the moving means 10 has an outer end surface of the stopper 78.
A contact member 80 capable of contacting the contact member 78a is provided, and a projecting rod 82 which is elastically urged by an elastic member 81 so as to project from the inner end surface 80a of the contact member 80 to the inner end side. When the first moving means 10 moves the first half former 1 to the tire forming center position Q side by the first moving means 10, the inner end face 80 a of the contact member 80 is provided with the stopper 78. Outer end face
It is designed to abut on 78a for positioning. At this time, the projecting rod 82 first contacts the stopper 78 while the contact member 80
By retracting to the side, the impact of the contact member 80 on the stopper 78 is buffered.

While the apparatus structure on the right side (first shaft 4 side) of the tire forming center position Q has been described above, the apparatus structure on the left side (second shaft 5 side) of the tire forming center position Q is also symmetrical. And have the same structure. Briefly described with reference to FIG. 1, a slide plate 14 is provided on a guide rail 13 at the left end of the base 12, and a second shaft holder 83 and a base 16 are provided on the slide plate 14. The outer end of the second shaft 5 is held by the second shaft holding portion 83, and the second half former 2 is provided on the inner end 5a of the second shaft 5. A second bead setter holding portion 84 is slidably provided on the guide rail 50 on the upper surface of the base portion 16, and the second bead setter 9 is held by the second bead setter holding portion 84 so as to be able to reciprocate in the axial direction. ing.

Next, a green tire forming process by the tire forming apparatus of the present invention will be described. FIG. 1 shows a standby state of the tire forming apparatus. At this time, the left and right first and second half formers 1 and 2 are each at a retracted position and are largely separated from each other. In this standby state, as shown in FIGS. 1 and 5, tire beads G are set on the first and second bead setters 8 and 9 on the left and right, and then the first and second half formers 1 and 2 are set. A cylindrical tire band (so-called carcass band) formed at another position is conveyed to the tire forming center position Q and on the axis P between the two.

Thereafter, the reciprocating cylinders 17, 17 of the first and second moving means 10, 11 are extended and driven to move the left and right bases 16, 16 to the tire forming center position Q side (shown by phantom lines). As described above, the first half former 1 and the second half former 2 are moved closer to a predetermined interval M around the center position Q. At this time, as described with reference to FIG. 6, the lengths of the left and right unit bodies 73, 73 of the positioning means 72 are adjusted in advance, and the respective stoppers 78, 78 are respectively positioned at predetermined distances L from the tire forming center position Q. It is set, the first
Each of the contact members 80, 80 of the second moving means 10, 11 is
It is positioned in contact with 8,78. That is, the first and second half formers 1 and 2 are positioned at positions close to the predetermined interval M, and the former width is set.

As described above, the first and second half formers 1 and 2 are inserted into the holes of the tire band by moving closer to each other, and as shown in FIG. 1, 2 expand the diameter to hold the tire band Y and complete the reception. At this time, since only the flow path for supplying the fluid exists inside the first shaft 4 and the second shaft 5, the flow path cross-sectional area can be made large, whereby the first and second halves are formed. The scaling operation of the formers 1 and 2 can be performed quickly.

The operation of the first half former 1 will now be described with reference to FIGS. 1 and 7.
The first bead setter 8 moves toward the first half former 1 (in the direction of arrow C) with the 70 protruding toward the first half former 1 (inward of the shaft), and sets the tire bead G to the tire band Y. I do. At this time, the inner end of the finger portion 70 enters the inner cylinder wall portion 55 while pressing the tire band Y (return).
Then, the apex holding portion 64 moves forward, falls down the apex portion of the tire bead G toward the outer peripheral surface side of the tire band Y (as indicated by a virtual line), and retreats. Thereafter, the first bead setter 8 retreats off-axis from the first turn-up bladder 6, and the first turn-up bladder 6 expands to turn the opening edge of the tire band Y around the tire bead G. Thereafter, the first turn-up bladder 6 contracts and the first half former 1 contracts in diameter. The operation of the first half former 1 has been described above, but the same applies to the operation of the second half former 2. After that, the first and second half formers 1,
2 is retracted and separated from each other, and a molded intermediate molded product (a so-called 1st cover) is taken out.

The present invention is not limited to the above-described embodiment. For example, in the present embodiment, a case where a bead set / turn-up process is performed while holding a tire band formed at another position will be described. However, after the first and second half formers 1 and 2 are moved closer to each other to set the former width, the inner liner and the carcass are sequentially supplied from the servicer to the former 3 to form a tire band. It is also possible to perform a bead setting / turn-up process.

[0035]

Since the present invention is configured as described above, the following effects can be obtained.

According to the first aspect of the present invention, the time required to receive the tire band of the former 3 and / or to remove the intermediate molded product from the former 3 in the tire molding process is reduced, and the productivity is reduced. Is improved. In addition, since the first shaft 4 and the second shaft 5 are structured so as to approach and separate relatively, the structure of the first shaft 4 and the second shaft 5 is simplified. 4. It can be omitted from the second shaft 5), and the cost of the apparatus can be reduced.

(According to claim 2) Green tire 1st
In the molding process, the time required for receiving the carcass case of the former 3 and removing the first cover from the former 3 after molding is reduced, and the productivity is improved. In addition, since the first shaft 4 and the second shaft 5 are structured so as to approach and separate relatively, the structure of the first shaft 4 and the second shaft 5 is simplified. 4. It can be omitted from the second shaft 5), and the cost of the apparatus can be reduced.

According to the third aspect, the time for receiving the carcass case and the time for removing the first cover after molding are shorter, and the productivity can be further improved.
According to the fourth aspect, the first half former 1 and the second half former 2 can be positioned at a predetermined interval M with high precision around the tire forming center position Q.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a sectional view of a main part showing an internal structure of an inner end side of a first shaft.

FIG. 3 is a cross-sectional view illustrating a main part of the first half former in an expanded state.

FIG. 4 is an explanatory diagram showing an enlarged / reduced state of a first half former as viewed from an axial direction.

FIG. 5 is a sectional view of a main part showing an internal structure of a first bead setter.

FIG. 6 is an explanatory view showing a stopper of a positioning means and a contact member of a first moving means.

FIG. 7 is a partially cutaway sectional view showing a state where a tire bead is set on a tire band.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st half-former 2 2nd half-former 3 Former 4 1st axis 4a Inner end 5 2nd axis 5a Inner end 6 1st turn-up bladder 7 2nd turn-up bladder 8 1st bead setter 9 2nd bead setter 10 First moving means 11 Second moving means 72 Positioning means 78 Stopper M Predetermined interval P axis

Claims (4)

[Claims] 1. A former 3 comprising a first half former 1 and a second half former 2 divided in an axial direction, wherein the first half former 1 and the second half former 2 are the same. Attached to the inner ends 4a, 5a of the first shaft 4 and the second shaft 5, respectively, which are moved on the axis P and relatively in the axial direction so that their inner ends 4a, 5a can approach and separate from each other. A tire forming apparatus characterized by being performed. 2. A former 3 comprising a first half former 1 and a second half former 2 divided in an axial direction, wherein the first half former 1 and the second half former 2 are the same. Attached to the inner ends 4a, 5a of the first shaft 4 and the second shaft 5, respectively, which are moved on the axis P and relatively in the axial direction so that their inner ends 4a, 5a can approach and separate from each other. And a first turn-up bladder 6 and a second turn-up bladder 7 provided on the first shaft 4 and the second shaft 5, respectively, and a second turn-up bladder 7 provided on the first shaft 4 and the second shaft 5, respectively. 1 bead setter 8 and 2nd bead setter 9
And a tire building apparatus. 3. A first moving means 10 and a second moving means 11 for moving the first shaft 4 and the second shaft 5 in the axial direction, respectively, and the first moving means 10 and the second moving means 11 By moving the first axis 4 and the second axis 5 in opposite directions, the first half former 1 and the second half
The tire forming apparatus according to claim 2, wherein the half formers (2) are moved toward and away from each other. 4. A positioning means 72 capable of adjusting the length in the axial direction, comprising a first half former 1 and a second half former 2.
When approaching, the stopper 78 of the positioning means 72
The first movable unit 10 and the second movable unit 11 are brought into contact with each other, and the first half former 1 and the second half former 2
4. The position of the motor is determined at a predetermined interval M.
The tire molding apparatus as described in the above.