JPH1142645A - Heated pressure medium supply device of tire vulcanizing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heated pressure medium supply device not exerting adverse effect on a part such as a packing or the like. SOLUTION: In a heated pressure medium supply device of a tire vulcanizing machine for supplying a heated pressure medium into a tire during vulcanization, a nozzle 9 having a heated pressure medium blowoff port 9b on the side of an upper ring 10 is provided to the upper ring 10 of a center mechanism and an upper cylindrical part 9a extending downwardly is provided in the nozzle 9 on the upper ring side so as to be concentric with respect to the post 18 of the center mechanism and a lower cylindrical part 8b forming a relay chamber 8a supplying a heated pressure medium to the nozzle 9 on the upper ring side 9 is provided in the lower ring 7 of the center mechanism in a state fitted to and separated from the upper cylindrical part 9a and mutually fitted to the ring 7 in vulcanization.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating and pressurizing medium supply device used in a tire vulcanizer.

[0002]

2. Description of the Related Art Heating and pressurizing media (steam, inert gas, etc.) have been supplied to the inside of a tire during vulcanization only once from the lower ring side. In order to measure the size, a technique for supplying from the upper ring side has also been proposed (for example, Japanese Patent Application Laid-Open No. 57-87349).
No. JP-A-2-155615).

[0003]

However, when the heating and pressurizing medium is supplied from the upper ring side, the heating and pressurizing medium is passed through a passage provided in a center post (for example, Japanese Patent Laid-Open No. 2-155615). In FIG. 11), there is a problem in that a post elevating fluid pressure cylinder to which a lower end of a center post (hereinafter referred to as a post) is connected is heated to shorten the life of the packing or to be restricted in the type of pressure fluid used. Came out.

Further, a structure in which a pipe for a heating and pressurizing medium is slid through a lower ring (for example, see Japanese Patent Laid-Open No. 15561/1990)
No. 5, FIG. 1), the thermal expansion of the upper nozzle changes the center-to-center distance between the post and the pipe for the heating and pressurizing medium, causing problems such as abnormal wear of the sliding surface and shortening of the life of the packing. Was.

[0005] The present invention has been made to solve such a problem, and an object of the present invention is to provide a heating and pressurizing medium supply device for a tire vulcanizer that does not adversely affect parts such as packing.

[0006]

The heating and pressurizing medium supply apparatus for a tire vulcanizer according to the present invention supplies a heating and pressurizing medium into a tire being vulcanized. An upper ring-side nozzle having a heating and pressurizing medium outlet is provided on the upper ring of the center mechanism, and the upper ring-side nozzle is concentric with the post of the center mechanism, and has an upper cylindrical portion extending downward. In addition to the above, the lower cylindrical portion which can be fitted to and detached from the upper cylindrical portion with the lower ring of the central mechanism and which is fitted to each other during tire vulcanization and forms a relay chamber for supplying a heating and pressurizing medium to the upper ring side nozzle. Is provided. That is, a cylinder is formed concentrically with the post on the lower surface side of the upper ring side nozzle fixed or integrated with the upper ring, and a concentric cylinder that can be inserted into and removed from the cylinder is fixed to the lower ring, and tire vulcanization is performed. The two cylinders are inserted into this state to form a heating / pressurizing medium relay chamber for the upper ring.

Furthermore, in the heating and pressurizing medium supply device for a tire vulcanizer of the present invention, the upper cylindrical portion is formed integrally with the upper ring side nozzle. That is, the plurality of outlets of the upper ring side nozzle communicate with the inside of the lower surface side cylinder of the nozzle.

Further, in the heating and pressurizing medium supply device for a tire vulcanizer according to the present invention, the lower cylindrical portion is provided on a lower ring of the central mechanism and has a lower ring side nozzle having a heating and pressurizing medium outlet. It is formed integrally.

[0009]

In the heating and pressurizing medium supply device for a tire vulcanizer of the present invention, a heating and pressurizing medium relay chamber is formed by fitting the upper and lower rings to each other, and the heating and pressurizing medium is supplied to the relay chamber. Then, the medium is supplied from the upper ring side nozzle.
When the tire is carried out, the upper and lower cylinders forming the relay room are separated by separating the upper and lower rings, so that the tire can be discharged and inserted without any trouble.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. 1 and 2 are cross-sectional views including the vertical center line AA of the central mechanism, and members constituting a tire vulcanizer such as an upper mold and a beam for mounting the upper mold are not shown. The right and left portions from the AA line in FIG. 1 and the left portion from the AA line in FIG. 2 show cross sections having different phases.

The tire vulcanizer has a base 1.
A lower platen 3 is fixed to an upper surface of the base 1 via a heat insulating plate 2. A lower mold 4 is attached to the upper surface of the lower platen 3 by bolting. In addition, T is a tire being vulcanized, and B is a bladder.

A lower bead ring 6 is detachably fitted in the central recess 4a of the lower mold 4. The lower bead ring 6 forms a part of a tire mold. The lower ring 7 is fitted into the inner peripheral surface of the lower bead ring 6 and is bolted. The lower ring 7 and the lower bead ring 6
And clamp the lower end of the bladder B. An upper bead ring 11 is detachably fitted in a central concave portion of an upper mold (not shown). The upper bead ring 11 forms a part of a tire mold. An upper ring 10 is bolted to a lower surface of the upper bead ring 11. The upper ring 10 and the upper bead ring 11 sandwich the upper end of the bladder B. The lower ring 7, the lower bead ring 6,
The bladder B, the upper ring 10 and the upper bead ring 11 constitute a bladder assembly. This bladder assembly is generally pre-assembled outside the machine and used for carrying in. However, in the present embodiment, a vulcanizing medium, a heating medium, and / or
Alternatively, the lower nozzle 8 for supplying the pressurized medium is bolted to the lower ring 7, and the upper nozzle 9 is bolted to the upper ring 10.

The outer cylinder 12 has a flange portion 12 a on the outer periphery of the upper portion, and the flange portion 12 a is bolted to the inner periphery of the lower platen 3. A central portion of a housing 13 is inserted into the outer cylinder 12 so as to be slidable up and down with a bush fixed on the inner periphery of the outer cylinder 12 serving as a guide. Housing 13
An upper flange 13a is screwed and fixed to an upper end portion of the upper side. A cylindrical projection 13c is formed on the upper surface of the upper flange 13a. A lower flange 13b is formed integrally with the lower end of the housing 13. And
A post cylinder 19 is bolted to the lower surface of the lower flange 13b. The lower end of the post cylinder 19 is bolted to the center of the beam 20. On the other hand, a bracket 5 is bolted to the base 1, and a bead lift cylinder 21 is suspended from the bracket 5 via a pin 5a. The piston rod 21 a of the bead cylinder 21 is connected to both ends of the beam 20. And the bead lift cylinder 21
The housing 13 is moved up and down via the beam 20 and the post cylinder 19 by the action of.

A post 18 is provided in the inner hole of the housing 13.
Are slidably inserted. The lower end of the post 18 is fixed to a piston rod 19a of the post cylinder 19, and a known packing is inserted between the post 18 and the upper flange 13a. Then, the post 18 is moved up and down by the action of the post cylinder 19.

At the center of the upper ring 10 is a post 18
A hole 10a into which the upper end of the post 18 can be inserted, a convex portion 10b for regulating the insertion length of the upper end of the post 18, and a horizontal hole 10a.
c are respectively formed. On the other hand, a horizontal hole 18a is formed at the upper end of the post 18, and a pin 22 is inserted into the hole 18a and the hole 10c of the upper ring 10, and a C-shaped retaining ring 24 is inserted into the pin 22 to prevent the pin 22 from coming off. The ring 10 and the post 18 are fixed. In addition, as shown in FIG.
c is an elongated hole in the horizontal direction, a flat surface is formed on the lower surface of the pin 22, and a handle ring 23 is inserted and integrated into the pin 22.

As shown in FIG. 4, a cylindrical surface 7d is formed at the center of the lower ring 7, and the cylindrical surface 7d
, A cylindrical projection 13c of the housing 13 is removably inserted. A concave portion 7 is provided on the lower surface side of the lower ring 7.
b is formed. The housing 1 is provided in the recess 7b.
A T-shaped head 14a formed at the upper end of a plurality of clamp rods 14 which are assembled to be movable up and down and rotatably is inserted in a detachable manner. Further, as shown in FIG. 5, the entrance of the concave portion 7b has a T angle depending on the rotation angle of the clamp rod 14.
A projection 7c through which the head 14a passes or locks is formed.
The claw mechanism is constituted by the head 14a and the projection 7c. Reference numeral 28 denotes an O-ring for sealing a vulcanizing medium.

A bracket 15 is attached to the housing 13 so as to be able to move up and down. On the other hand, a lifting cylinder 17 is bolted to the lower flange 13b of the housing 13. The piston rod 17 a of the lifting cylinder 17 is fixed to the bracket 15. A rotary cylinder 16 is fixed to the bracket 15, and an output shaft 16 a of the rotary cylinder 16 is keyed to a lower end of the clamp rod 14. Then, the clamp rod 14 is moved up and down and rotated by the action of the cylinders 16 and 17.

The upper nozzle 9 has a plurality of heating medium outlets 9b which are opened at a predetermined angle with respect to the radial direction in the horizontal plane. An upper cylindrical portion 9a is formed on the lower surface of the upper nozzle 9 on the ring side.
a has a cylindrical surface 9 into which the lower cylindrical portion 8b of the lower nozzle 8 can be inserted.
c. And, at the time of tire vulcanization, the upper cylindrical portion 9a
The lower cylindrical portion 8b is inserted into the upper cylindrical portion 9a, and the space between the inner peripheral cylindrical surface 9c of the upper cylindrical portion 9a and the outer peripheral cylindrical surface 8e of the lower cylindrical portion 8b is kept airtight to form the heating medium relay chamber 8a. A passage 25 is formed in the upper flange 13a of the housing 13, and an upper end of the passage 25 opens to the heating medium relay chamber 8a.
A pipe 26 is attached to the other end of the passage 25, and the pipe 26 is connected to a heating medium source via a switching valve or the like.

The lower nozzle 8 is provided with a plurality of pressurized medium outlets 8d at a predetermined angle with respect to the radial direction in the horizontal plane and at a predetermined angle with respect to the horizontal plane. The pressurized medium outlet 8d communicates with the pressurized medium relay chamber 8c. Further, as shown in FIG. 2, a passage 7a is formed in the lower ring 7, and an upper end of the passage 7a opens to the pressurized medium relay chamber 8c. When the lower ring 7 is seated on the upper flange 13a, the lower end of the passage 7a
The upper end of the passage 13d formed in the upper flange 13a is air-tightly communicated. A pipe 27 is provided at the lower end of the passage 13d.
The pipe 27 is connected to a pressurized medium supply source via a switching valve or the like. Although a similar vulcanizing medium discharging means is also provided, it is not shown.

Next, the operation of the present embodiment will be described. When replacing the bladder, first, the post cylinder 19 is operated without the tire T to raise the post 18, and the upper ring 10 is raised to extend the bladder B. Next, the cylinder 17 is operated to raise the clamp rod 14, and the lower ring 7 is raised from the upper flange 13a. Next, the rotary cylinder 16 is operated to rotate the clamp rod 14 so that the clamp rod 14 can pass through the T-shaped head 14a and the projection 7c. Next, the pin 22 is pulled out of the upper ring 10 and the post 18, and the bladder assembly is lifted out of the machine with the help of a lifting tool such as a forklift. Then, replacement of the bladder B and, if necessary, replacement of the bead rings 6 and 11 are performed.

When the bladder B and the like have been carried out, the bladder assembly is suspended in the reverse order to the above, and the post 1
8 into the hole 10a of the upper ring 10 and the clamp rod 1
Then, the T-shaped head 14a is inserted into the recess 7b of the lower ring 7, and the pin 22 is inserted into the holes 10a and 18a to fix the post 18 and the upper ring 10. Next, the T-shaped head 14a of the head of the clamp rod 14 and the projection 7c of the lower ring 7 are locked by operating the rotary cylinder 16 in reverse. At this time, the respective dimensions are determined so that the inner cylindrical surface 7d of the lower ring 7 and the central cylindrical outer surface 13e of the upper flange 13a are concentric, and the pressurized medium passages 7a and 13d are also concentric. . The lower ring 7 is pulled down by operating the cylinder 17 in the opposite manner to the above, and the lower ring 7 is
And the replacement work of the bladder or the like is completed.

At the time of tire vulcanization, the post cylinder 19 and the bead lift cylinder 21 are operated to extend the bladder B and raise the lower bead ring 6 to cure the vulcanized material from the lower mold 4 in the same manner as the conventional center mechanism. Peeling of the tire T can be performed. When the shaping is completed and the upper and lower molds are closed, the cylindrical portion 8b of the lower nozzle 8 is inserted into the cylindrical portion 9a of the upper nozzle 9 to form the heating medium relay chamber 8a. From 9b, the heating medium can be ejected inward of the tire T.

In the above embodiment, the cylindrical portion 9a of the upper ring side nozzle 9 is fitted to the outer cylindrical surface 8e of the cylindrical portion 8b of the lower nozzle 8, but the cylindrical portion 8b of the lower nozzle 8 is May be fitted to the outer peripheral cylindrical surface of the cylindrical portion 9a of the upper nozzle 9.

[0024]

As described above, in the heating and pressurizing medium supply device for a tire vulcanizer according to the present invention, the heating and pressurizing medium relay chamber is formed by fitting the upper and lower rings to each other, and the relay chamber is formed. The heating and pressurizing medium is supplied to the upper ring side nozzle through the upper ring side nozzle, and the medium is supplied from the upper ring side nozzle, so that the temperature of the post cylinder and the like is not increased, and there is a possibility that those packings may be adversely affected. There is no. When the tire is carried in and out, the upper and lower cylinders forming the relay chamber are separated by separating the upper and lower rings, so that the tire can be discharged and inserted without any trouble.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a heating and pressurizing medium supply device for a tire vulcanizer according to the present invention, and is a vertical sectional view of a central mechanism thereof.

FIG. 2 is a vertical cross-sectional view of the embodiment of the heating and pressurizing medium supply device for a tire vulcanizer according to the present invention, in which the phase of a central mechanism is different from that of FIG. 1;

FIG. 3 is a view taken in the direction of the arrow C in FIGS. 1 and 2;

FIG. 4 is an enlarged view of a part D in FIGS. 1 and 2;

FIG. 5 is a sectional view taken along line EE of FIG. 4;

[Explanation of symbols]

 Reference Signs List 6 lower bead ring 7 lower ring 8 lower nozzle 8a heating medium relay chamber 8b lower ring side cylindrical portion 9 upper ring side nozzle 9a upper ring side cylindrical portion 9b heating medium outlet 10 upper ring 11 upper bead ring 18 post 19 post cylinder T Tire B Bladder 6, 7, B, 10, 11 Bladder assembly

Claims (3)

[Claims] 1. A heating and pressurizing medium supply device of a tire vulcanizer for supplying a heating and pressurizing medium into a tire being vulcanized,
An upper ring side nozzle having a heating and pressurizing medium outlet is provided on the upper ring of the central mechanism, and the upper ring side nozzle is provided with an upper cylindrical portion which is concentric with the post of the central mechanism and extends downward. A lower cylindrical portion is provided on the lower ring of the central mechanism, the lower cylindrical portion being removably fitted to the upper cylindrical portion and forming a relay chamber that is fitted to each other during tire vulcanization and supplies a heating and pressurizing medium to the upper ring side nozzle. A heating and pressurizing medium supply device for a tire vulcanizer, comprising: 2. The heating and pressurizing medium supply device for a tire vulcanizer according to claim 1, wherein the upper cylindrical portion is formed integrally with the upper ring side nozzle. 3. The lower cylindrical portion provided on the lower ring of the central mechanism and integrally formed with a lower ring side nozzle having a heating and pressurizing medium outlet.
Or a heating and pressurizing medium supply device for a tire vulcanizer according to 2.