JP4291465B2 - Post-cure inflator lock / unlock mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lock / unlock mechanism for a post cure inflator for cooling and molding a vulcanized tire.
[0002]
[Prior art]
Rubber tires attached to vehicles and the like are cured to a final shape by vulcanization and given sufficient strength and elasticity, but the vulcanized tire is hot and soft. Then, it is transferred to a post cure inflator where it is cooled and hardened.
As shown in FIG. 5, this post-cure inflator is provided with a pair of flanges for closing the left and right side openings of the tire and an elevating device for sliding the upper flange, and after sealing the vulcanized tire between the flanges Then, compressed gas is blown into the tire and the tire is cooled for a predetermined time to be inflated.
Here, when compressed gas is blown into the tire, a tire expansion load is applied between the flanges, so that the centers of the flanges are connected to withstand this load, and when the tire is carried into and out of the flange, A lock / unlock mechanism for releasing the connection is provided.
[0003]
This lock / unlock mechanism keeps the center and parallel of the lower flange 57 on which the tire is placed horizontally, the upper flange 58 fitted on the tire, and the upper and lower flanges, and can slide in the direction in which the upper and lower flanges approach Thus, the male rod 59 and the female die 60 that maintain a constant interval in the direction of separation are the main components.
The male rod 59 protrudes downward from the upper flange so that the tip of the male rod 59 and the tip of the female die 60 are engaged.
When the vulcanized tire is placed on the lower flange 57, the upper flange 58 is lowered thereon to close the left and right side openings of the tire.
After the tire is closed, compressed gas is blown in, the expansion load is supported by the male rod 59 and the female die 60, and the tire is cooled and hardened.
[0004]
[Problems to be solved by the invention]
Here, in order to close the tire opening in order to inflate the tire between the upper and lower flanges, that is, in order to bring the tires into close contact with the flanges 57 and 58, the tire opening has a shape converging toward the inside. Further, since the tire after vulcanization is hot and soft, it is necessary that the flanges 57 and 58 are close to each other beyond a predetermined width for cooling and hardening, and the rim needs to be pressed against the bead portion of the tire.
For this reason, in the conventional lock / unlock mechanism, the male rod 59 has to penetrate deep into the female die 60 to bring the flanges 57 and 58 close to each other. Therefore, there is a problem that the deep female mold 60 is required and the entire apparatus becomes long and large.
Further, the conventional lock / unlock mechanism has a problem that the upper flange is large and the lifting device for the upper flange is large because the lock / unlock drive section is on the upper flange side.
[0005]
The present invention has been made in order to solve the above-mentioned conventional problems. The object of the present invention is to arrange a male rod on the lower flange and a female rod on the upper flange side. A post-cure inflator that can reduce the weight of the entire structure, including the upper flange lifting device, by reducing the weight of the female structure by forming a slide part, and also by disposing a lock / unlock mechanism and drive unit. It is to provide a lock / unlock mechanism.
[0006]
[Means for Solving the Problems]
In the post-cure inflator locking / unlocking mechanism according to claim 1, as means for achieving the object,
In a post-cure inflator that blows compressed gas into a vulcanized tire and cools it in a state where the tire is expanded,
A pair of flanges closing the openings on the left and right sides of the tire;
It has a lock mechanism that supports the tire inflation load between the flanges,
The flange is constituted by a lower flange for horizontally mounting the tire, and an upper flange disposed so as to be movable up and down above the lower flange,
The locking mechanism includes a male rod projecting from a lower flange surface and a female die of an upper flange engaged with a tip of the male rod , and the male rod is screwed onto a screw shaft. The adjustment side rod and the slide rod connected to the tip of the adjustment side rod
An adjusting mechanism for setting the length of the male rod is connected to the base of the male rod,
The male rod is provided with a slide portion that extends as the tire expands,
Set the distance between the flanges according to the tire width by the adjustment mechanism,
It was set as the structure which supports the expansion | swelling load of a tire with a male type | mold rod and a female type | mold.
[0007]
In the lock / unlock mechanism of the post-cure inflator according to claim 2,
The post-cure inflator lock / unlock mechanism according to claim 1, wherein the slide portion is formed to slide down by its own weight when unlocked.
[0008]
In the lock / unlock mechanism of the post cure inflator according to claim 3,
The lock / unlock mechanism of the post cure inflator according to claim 1 or 2, wherein the tip of the male rod and the female die are connected by a bayonet mechanism, and the drive unit of the bayonet mechanism is installed on the male rod side. .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a sectional view of a lock / unlock mechanism of a post-cure inflator according to an embodiment of the present invention.
As shown in FIG. 1, a post-cure inflator lock / unlock mechanism A according to an embodiment of the present invention includes an upper flange 1 and a lower flange 2 that fit into openings on the left and right side surfaces of a tire, and an upper flange 1. A female die 3 is formed at the center of the upper flange 1, and a male rod 4 projects from the center of the lower flange 2.
A rim that is in close contact with the inner periphery of the tire is disposed on the outer periphery of the flanges 1 and 2, and a compressed gas injection hole 5 is formed at one end of the lower flange.
The female die 3 is formed by a depressed portion 3a at the center of the upper flange 1 surface, and a projection 6 for centering the upper and lower flanges and transmitting the locking / unlocking rotational force is disposed at the center of the depressed portion 3a. The tip of the male rod 4 is fitted into the outer periphery of the rod.
[0010]
The hooking portion between the upper portion of the protrusion 6 and the lifting device 5a has a bayonet structure as shown in FIG. 3, similar to the hooking portion between the male and female dies, and the bayonet of the hooking portion between the male and female molds. Operates simultaneously with lock / unlock operation. However, the former is unlocked when the former is locked, and the latter is locked when the former is unlocked.
In addition, it is necessary to mechanically hold the locked / unlocked state as a safety measure when inflating or lifting / lowering the flange 1 to carry out / loading tires. Then, the lock pin 6b is 120 on the lock plate 6a. The lock plate 6a is fitted into the hole formed at each time to restrict the rotation operation of the lock plate, and during the lock / unlock operation, the lift device 5a descends and pushes down the lock pin 6b so that the lock plate 6a It has a structure that can be rotated by movement.
In FIG. 3, a broken line indicates a locked state (a state where the flange 1 and the lifting device 5a can be moved up and down integrally), and a solid line indicates an unlocked state (a state where the flange 1 and the lifting device 5a can be separated).
FIG. 2 shows a state in which the lifting device 5a pushes down the lock pin. Thus, since the upper flange 1 is only the recessed portion of the female mold 3 and the engaging portion with the lifting device, it has a lightweight and compact structure suitable for lifting and other movement.
[0011]
The lower flange 2 is provided with a central screw shaft 7, a male rod 4 connected to the screw shaft 7, and a drive unit 8 of a bayonet locking / unlocking mechanism. A drive unit 8 is connected to the base of the screw shaft 7 to form an adjustment mechanism.
The male rod 4 includes an adjustment side rod 9 screwed to the screw shaft 7 and a slide rod 10 connected to the tip of the male rod 4. The slide rod 10 is disposed along the inside of the adjustment side rod 9. 10 slides along the inner circumference of the adjusting rod 9.
The slide rod 10 and the adjustment side rod 9 are slidably connected in a state where they are fixed by a key or the like so as not to rotate. The slide portion has a low sliding resistance, and when the tire is not loaded, the slide rod 10 is lowered by its own weight so that the entire male rod 4 is reduced.
[0012]
Further, stoppers 9a and 10a are disposed at the distal end of the adjustment side rod 9 and the base end of the slide rod 10, respectively, and after the slide rod 10 extends and the stoppers come into contact with each other, further extension is prevented, It supports the inflation load of the tire.
An internal thread is formed at the base end of the adjustment side rod 9 and the internal thread is screwed onto the outer periphery of the screw shaft 7 to form an adjustment mechanism. By rotating the screw shaft 7, the adjustment side rod 9 is Since the rotation is restricted by, for example, it moves up and down, so that the distance between the flanges 1 and 2 can be arbitrarily set.
[0013]
Next, a connection structure of the bayonet mechanism will be described.
As shown in FIG. 4, the front end plane of the male rod 4 is formed in a substantially triangular shape, and the female inlet portion is also formed in a substantially triangular shape.
In addition, the front end plane of the male rod 4 can be formed in a cross shape or the like in addition to a substantially triangular shape. In this case, locking and unlocking are performed by rotating 45 degrees.
A drive unit 8 for rotating the male rod 4 is disposed on the side of the lower flange 2, and the male rod 4 is rotated 60 degrees by the cylinder 8, so that the shape of the male rod tip and the female inlet is shaped. The male rods can be fitted into the female die.
After the male rod 4 is fitted into the female die 3, the cylinder is rotated 60 degrees and returned to the original position, whereby the convex portion at the tip of the male rod 4 and the convex portion at the inlet of the female die 3 are engaged. Combine and join.
In the lock / unlock mechanism A of the present invention, since the bayonet lock drive section (cylinder) 8 is installed on the lower flange 2 side, no extra structure is added to the upper flange 1 side (female mold), and the female mold is lightweight. Compact structure.
[0014]
Next, the operation of the post-cure inflator lock / unlock mechanism of the present invention will be described.
When the tire is not mounted, the upper flange 1 stands by above by the lifting device, and the lower flange and the upper flange are separated.
The screw shaft 7 is rotated according to the shape of the tire, the position of the male rod 4 is adjusted, the positions of the stoppers 9a and 10a are adjusted, and the tire 1 is inflated with compressed air between the flanges 1 and 2. Set the distance.
The vulcanized tire is conveyed onto the lower flange 2 by an unloader.
Here, although the male rod 4 protrudes from the center of the lower flange 2, the male rod 4 is contracted by its own weight, and the protrusion from the rim is reduced. The lifting stroke placed on the rim of the rim 2 is reduced, so that the lifting operation of the upper flange 1 can be reduced.
[0015]
After the tire is loaded on the lower flange 2, the lifting device operates, the upper flange 1 is lowered, and the openings on both sides of the tire are closed by the flange.
Here, since the opening of the tire has a shape converged toward the inside, in order to make the flanges 1 and 2 and the tire closely contact each other, the flanges 1 and 2 need to be close to each other and the rim needs to enter the inside of the tire. .
In the lock / unlock mechanism according to the conventional example, since the male rod does not shrink, a deep female die is required and it is necessary to penetrate deep into the female die. However, the male die is reduced in the lock / unlock mechanism of the present invention. A deep female mold is not required and the device is shortened.
[0016]
After the tip of the male rod 4 is engaged with the female die 3 and connected by the bayonet lock mechanism, and at the same time the connection with the lifter side is released, compressed gas is blown into the tire for expansion and cooling.
As the tire expands, the slide rod 10 extends, and the stopper comes into contact with a predetermined position to support the tire inflating load. After the tire is cooled, the compressed gas is discharged to release the bayonet locking mechanism, and simultaneously connected to the lifter side, the upper flange 1 is raised and the tire is taken out.
[0017]
Although the embodiment of the present invention has been described above, the specific configuration of the present invention is not limited to the present embodiment, and even if there is a design change or the like without departing from the gist of the invention, Included in the invention.
For example, in the above-described embodiment, the male rod and the female die are engaged, but an engaging portion other than the female die can also be used.
Moreover, in the said embodiment, it was set as the structure which arrange | positions a female type | mold on the upper flange side, However, Even if it is a case where it arrange | positions on the lower flange side, it is included in this invention.
[0018]
【The invention's effect】
As described above, in the lock / unlock mechanism of the post-cure inflator according to claim 1 of the present invention, since the adjusting mechanism is connected to the male rod side, no extra mechanism is attached to the female mold, and the female mold The structure becomes simple.
In addition, since the slide part that extends with the tire expansion is formed on the male rod, it does not require a deep female mold as in the prior art, and the device can be miniaturized, and the size of the upper and lower flanges can be reduced when the tire is mounted. Therefore, the lifting stroke of the upper flange can be reduced.
[0019]
In particular, because the female structure with a simple structure is arranged on the upper flange side that moves up and down instead of the lower flange side where the position is fixed, the operation of the lifting device can be reduced, and there is no lock / unlock or adjustment drive part There is no power cable wiring and it is simple.
Further, since the structure of the upper flange is simplified, the tire can be transported by attaching a tire gripping mechanism to the upper flange side.
[0020]
In the post-cure inflator lock / unlock mechanism according to the second aspect, the slide portion of the male rod can be slid down by its own weight when unlocked.
[0021]
In the lock / unlock mechanism of the post-cure inflator according to claim 3, the male rod and the female die are securely connected by the bayonet lock mechanism.
Moreover, since the drive part of the bayonet mechanism is arranged on the male rod side, no extra mechanism is attached to the female mold, and the female mold is lightweight and compact.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a lock / unlock mechanism of a post-cure inflator.
FIG. 2 is an enlarged view of a joint portion between the lifting device and the upper flange.
FIG. 3 is a cross-sectional view taken along the line AA in FIG.
FIG. 4 is an explanatory view showing a bayonet mechanism.
FIG. 5 is a cross-sectional view of a lock / unlock mechanism according to a conventional example.
[Explanation of symbols]
A lock / unlock mechanism 1 upper flange 2 lower flange 3 female mold 4 male rod 5 compressed gas injection hole 6 protrusion 6a lock plate 6b lock pin 7 screw shaft 8 drive unit 9 adjusting side rod 9a stopper 10 slide rod 10a stopper

Claims (3)

In a post-cure inflator that blows compressed gas into a vulcanized tire and cools it in a state where the tire is expanded,
A pair of flanges closing the openings on the left and right sides of the tire;
It has a lock mechanism that supports the tire inflation load between the flanges,
The flange is constituted by a lower flange for horizontally mounting the tire, and an upper flange disposed so as to be movable up and down above the lower flange,
The locking mechanism includes a male rod projecting from a lower flange surface and a female die of an upper flange engaged with a tip of the male rod , and the male rod is screwed onto a screw shaft. The adjustment side rod and the slide rod connected to the tip of the adjustment side rod
An adjusting mechanism for setting the length of the male rod is connected to the base of the male rod,
The male rod is provided with a slide portion that extends as the tire expands,
Set the distance between the flanges according to the tire width by the adjustment mechanism,
A post-cure inflator locking / unlocking mechanism characterized by supporting a tire inflation load with a male rod and a female die. The post-cure inflator lock / unlock mechanism according to claim 1, wherein the slide part is formed to slide down by its own weight when unlocked. 3. A post-cure inflator locking / unlocking mechanism according to claim 1, wherein a tip of the male rod is connected to a female die by a bayonet mechanism, and a drive unit of the bayonet mechanism is installed on the male rod side. .

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