JPS6335411B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a second tire former device for a tire molding machine, and particularly includes a locking device for locking a former ring of a tail former device to a tail bladder ring of a main body former device. , the tail side former ring is made to follow the movement of the main shaft of the main body side former device via a lock device.

Conventionally, as a tire former device for secondary molding of green tires, the tail former device is moved in the axial direction to form the tail side former ring.
A structure that presses against the tail side bladder ring of the main body side former device is generally used. In this type of tire former device, when a green tire is inserted and molded using a bladder, the tail former ring receives a large inflation internal pressure through the bead of the tire, so the reaction force due to this internal pressure is On the other hand, in order to follow the movement of the main shaft of the main-side former device, a large thrust must always be applied to the tail-side former ring to press it. For this reason, a high-output device is required as a tail-side thrust mechanism, but
Increasing the thrust beyond a certain limit is difficult in practice because it places a problematic load on the feed mechanism of the main shaft on the main body side.Therefore, there is a limit to increasing the internal inflation pressure, and the tire molding conditions There is a problem with being restricted.

This invention was made to solve the above problem, and an object of the invention is to connect a tail former ring to the main shaft of the main body via a tail bladder ring attached to the main shaft of the main body. An object of the present invention is to provide a tire former device having a locking device capable of locking the tire.

That is, as shown in the embodiments and drawings described later, the present invention includes a main body-side former device 10 and a tail-side former device 50, and a former ring 54 attached to a main shaft 51 of the tail-side former device 50 is connected to the main shaft 51. In the second tire former device of the tire building machine, the tail former device 50 is configured to move in the direction and press against the tail bladder ring 29 attached to the main shaft 11 of the main body former device 10.
a ring-shaped jaw portion 58 protruding in the radial direction on the inner peripheral surface of the former ring 54; and a jaw portion 5 of the tail former ring 54 relative to the tail bladder ring 29 of the former former device 10
and locking devices 35 and 40 capable of locking the
When the tail-side former device 50 moves forward, the tail-side former ring 54 in contact with the tail-side bladder ring 29 is locked by the locking device 3.
The present invention relates to a second tire former device for a tire molding machine, which is characterized in that it is connected to the main shaft 11 of the main body former device 10 via 5, 40.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 and FIG. 2 show an embodiment of the present invention,
FIG. 1 is a vertical sectional view showing the upper half from the central axis, and FIG.
The figures each show a state in which the main body side former device 10 and the tail side former device 50 are connected during green tire molding.

In FIG. 1, reference numeral 11 indicates a pressurized air supply port 12.
A sleeve 13 is spline-fitted to the main body-side main shaft 11 in a hollow shape. The main body side main shaft 11 is rotatably supported around its central axis via a rotation mechanism (not shown), and the main body side main shaft 11 and the sleeve 13 are
For example, through a feed mechanism (not shown), such as a reverse screw mechanism, it is adapted to move forward and backward by the same distance in opposite directions of the central axis.

A cylindrical member 16 that is integrated with the body-side bladder ring 20 is attached to this sleeve 13 via a fixing member 17 with a nut 18 . A seal member 19 is fitted between the front end of the fixing member 17 and the main shaft 11 on the main body side to maintain airtightness.

Bladder clamp rings 15 and 22 are attached to both sides of the outer edge of the body side bladder ring 20, and the ends of the split bladder 14a are sandwiched on both sides of the bladder ring 20 and fixed by the bladder clamp rings 15 and 22. It has been done. Reference numeral 21 is a pressurized air supply port.

A body-side former ring 24 is attached to the outer surface of the bladder ring 20 with bolts 25.

Further, a cylindrical member 27 integrated with a tail side bladder ring 29 is provided at the tip of the main shaft 11 on the main body side.
is attached by a nut 32 via a fixing member 28.

Bladder clamp rings 26 and 33 are attached to both sides of the outer edge of the tail side bladder ring 29, and the ends of the split bladder 14b are sandwiched between both sides of the bladder ring 29 and fixed by the bladder clamp rings 26 and 33. It has been done. Reference numeral 31 is a pressurized air supply port.

A tapered surface 30 whose diameter increases axially outward is formed on the inner circumferential surface of the axially outer end of the tail-side bladder ring 29 .

Further, the inner surface of the tail side bladder ring 29 is hollowed out and a plurality of locking devices are attached thereto. This locking device has a plurality of fluid pressure cylinders 35 fixed at equal intervals on the same circumference on the inner surface of the tail side bladder ring 29 in parallel to the axial direction.
The piston rod 36 of the fluid pressure cylinder 35 is made to protrude outside the tail side bladder ring 29, and on the outer surface of the tail side bladder ring 29,
A bracket 37 is fixed on the same circumference outside the fluid pressure cylinder 35 in the radial direction in parallel with the axial direction,
A rear end portion of a hook 40 having a locking portion 41 is rotatably attached to the tip of the bracket 37, and an intermediate portion of the hook 40 is rotatably attached to the tip of the piston rod 36 of the fluid pressure cylinder 35. I'm wearing it. The above-mentioned fluid pressure cylinder 35 is a single-acting cylinder equipped with a return spring (not shown) inside, and is connected to the fluid pressure supply port 42 of the tip 11a of the main shaft 11 on the main body side via a pipe 43. ing.

As shown in FIG. 2, the tail-side former device 50 includes a bracket 53 attached to a fixing member 52 fitted to a tail-side main shaft 51 with bolts 57, and a tail-side former ring 54 attached to the outer edge of the bracket 53. It is attached with bolts 55. The above-described tail-side main shaft 51 is rotatably supported, is adapted to move in the axial direction via a thrust mechanism (not shown), and has a hollow tip.

A tapered surface 56 is formed in the tail former ring 54 at a position corresponding to the tapered surface 30 of the tail bladder ring 29. The tapered surface 56 expands in diameter at the same taper angle and in the same direction as the tapered surface 30.

Furthermore, a ring-shaped jaw portion 58 that protrudes radially inward is formed on the inner circumferential surface of the tail-side former ring 54 on the side opposite to the tapered surface 56 .

When using the tire former device with the above configuration, as shown in FIG.
The piston rod 36 is moved backward by a return spring (not shown), and the locking portion 41 of the hook 40 is rotated downward. Further, the tail-side former ring 54 is retracted to the retracted position via the tail-side main shaft 51.

First, as shown in Fig. 2, the green tire 6
0 from the tail side, the tail side main shaft 51
When the tail former ring 54 is moved forward and fitted to the tip 11a of the main shaft 11, the tail former ring 54
The tapered surface 56 of the tail-side bladder rig 29 is fitted into the tapered surface 30 of the tail-side bladder rig 29. In this state, the bead portions 6 at both ends of the green tire 60
1 is placed on the main body side former ring 24 and the tail side former ring 54.

Next, when fluid pressure is supplied from the piping 43 to the fluid pressure cylinder 35 to move the piston rod 36 forward, the hook 40 rotates around the fulcrum of the bracket 37, and the locking portion 41 of the hook 40 engages with the tail side former. It is locked to the jaw portion 58 of the ring 54, and the tail former ring 54 is locked to the main shaft 11 via the tail bladder ring 29.

Following this, the pressurized air supply port 1 of the main shaft 11 on the main body side
2, and the pressure air supply ports 2 of the bladder rings 20, 29 on the main body side and the tail side.
1 and 31 to supply pressure air to the bladders 14a and 14.
Inflate b and perform inflation molding of green tire 60.

While the green tire 60 is being inflation-molded, as the gap between the bead portions 61 on both sides contracts and closes, the main shaft 1 on the main body side is moved by the feeding mechanism on the main body side.
1 moves rearward in the axial direction, and the sleeve 13 moves forward in the axial direction by equal distances, respectively, thereby connecting the tail former ring 54 connected to the tail bladder ring 29 of the main shaft 11 via the hook 40. The main body side former rings 24 connected to the sleeve 13 move toward each other in the axial direction, and the bead portion 61 of the green tire 60 moves.
Follows the contraction/closing movement of. During this time, the tail former ring 54 receives a large reaction force from the bead part 61 on which the inflation internal pressure from the bladders 14a and 14b acts, but this reaction force is applied to the jaw part 58 of the tail former ring 54. Since the burden is borne by the locked hook 40, there is no need to apply a large thrust to the tail-side thrust mechanism to press the tail-side main shaft 51.

In addition, the point of action of the piston rod 36 of the hydraulic cylinder 35 is eccentric with respect to the rotational fulcrum of the hook 40, and when the hydraulic cylinder 35 is operated, there is a gap between the locking portion 41 of the hook 40 and the rotational fulcrum. Since the weight is balanced, even if the hook 40 receives a large force, the fluid pressure in the fluid pressure cylinder 35 will not be greatly affected.

When the inflation molding of the green tire 60 is completed as described above, the supply of fluid pressure to the fluid pressure cylinder 35 of the hook 40 is stopped, and the engagement of the hook 40 is stopped from the jaw portion 58 of the tail side former ring 54. After engaging and disengaging the stop portion 41, the tail side main shaft 51 is moved backward to return the tail side former ring 54 to the retracted position, and the green tire 60 is pulled out to the tail side and taken out.

Note that during inflation molding of the green tire 60, the main shaft 11 on the main body side is rotated to rotate the tire former device, so the relative positional relationship between the former device on the main body side and the tail side at the start of each molding is as follows. , although they do not necessarily match, the jaw portion 58 of the tail side former ring 54
Since it protrudes in a ring shape, the hook 4 can be attached without being restricted by the relative position between the attachment position of the hook 40 and the jaw part 58 of the tail side former ring 54.
0 locking part 41 to the tail side former ring 54
It can be locked to the jaw part 58 of.

In the above embodiment, a mechanism in which the hook is locked by a fluid pressure cylinder is used as a locking device between the tail side former ring and the main shaft. The present invention is not limited to this, and it is possible to appropriately select and use a locking device having a mechanism equivalent to that of the above embodiment, such as a locking device with a mechanical opening/closing mechanism.

As explained above, in a second tire former device including a main body former device and a tail former device, the jaw portion provided on the former ring of the tail former device is connected to the main shaft of the main body former device. A lock device is provided to lock the tail bladder ring attached to the body, and the tail former ring is connected to the main shaft of the main body former device via the lock device when the tail former device is in the forward position. Therefore, according to the present invention, during inflation molding of a green tire, the reaction force that the tail side former ring receives is borne by the locking device, and the reaction force is borne by the locking device, thereby preventing the axial movement of the main shaft of the main body side former device. This means that a larger load can be applied than before, and the molding conditions for green tires are not restricted, making it possible to increase the internal inflation pressure and manufacture high-quality tires. . Further, according to the present invention, there is no need to apply a large thrust to the thrust mechanism of the tail-side former device, so an excessive load is not placed on the feed mechanism of the main shaft of the main-side former device, making maintenance and management of the device easier. The effect of making it easier can be obtained.

[Brief explanation of the drawing]

FIG. 1 and FIG. 2 are longitudinal sectional views showing the upper half of the embodiment of the present invention from the central axis;
FIG. 1 shows a main body side former device, and FIG. 2 shows a tail side former device connected to the main body side former device during molding of a green tire. In the figure, 10 is a former device on the main body side, 11 is a main shaft on the main body side, 29 is a tail side bladder ring, 35
40 is a hydraulic cylinder, 40 is a hook, 50 is a tail side former device, 51 is a tail side main shaft, 54 is a tail side former ring, and 58 is a jaw portion.

Claims (1)

[Claims] 1 Consisting of a main body side former device and a tail side former device, the former ring attached to the main shaft of the tail side former device is moved in the axial direction, and the former ring attached to the main shaft of the main body side former device is moved to the tail side bladder ring attached to the main shaft of the main body side former device. In a second tire former device of a tire molding machine configured to press, a ring-shaped jaw portion protruding in the radial direction of the inner peripheral surface of the former ring of the tail side former device, and a tail side brush of the main body side former device. A locking device capable of locking the jaws of the tail former ring to the bladder ring is provided, and when the tail former device moves forward, the tail former ring in contact with the tail bladder ring is A second tire former device for a tire molding machine, characterized in that it is connected to a main shaft of a main body former device via a lock device.