KR0137060B1 - Center mechanism of tire vulcanizing press - Google Patents

Abstract

[purpose]

The center mechanism of the tire vulcanizer which can change the arrangement of the cylinder device so that the projection below the center mechanism is as small as possible and can accommodate the cylinder device in the press frame at the time of transportation is provided.

[Configuration]

The center post which fixes and installs the hub 4 in which the bladder lower part is maintained above the cylinder 4c which slides the guide part 30 of the up-down direction provided in the press frame 34, and maintains the bladder upper part ( 3) A tire vulcanizer center mechanism in which a center hole 4a of the hub 4 is slid, wherein a cylinder in which the rod 31a is upward between the hub 4 and the center post 3 is moved. The device 31 is provided so that the hole 30a through which the rod 31a of the cylinder device 31 passes is opened around the guide portion 30.

Description

Central mechanism of tire vulcanizer

1 is a cross-sectional view of the center mechanism of the tire vulcanizer of the present invention.

2 is a cross-sectional view showing the attachment state of the bladder assembly to the central mechanism.

3 is a cross-sectional view of the center mechanism of a conventional tire vulcanizer

* Description of the symbols for the main parts of the drawings *

2: center mechanism 3: center post

4: hub 4a: center hole

4b: Flange 4c: Cylinder

10 bladder assembly 11 bladder

12: upper ring 13: bottom ring

30: guide part 30b: through hole

31 cylinder device 31a rod

31e: flange

[Industrial use]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a central mechanism of a tire vulcanizer for holding a bladder and moving up and down on a center, and more particularly, to change the arrangement of the cylinder device so that the projecting portion can be as small as possible.

[Prior art]

Conventionally, some of the central mechanisms of this type of tire vulcanizer are shown in FIG.

3 shows the green tire T seated on the base frame 51 by the loader 55 of the lifting material having the chuck 54 on the lower die 53 fixed through the lower mold attachment member 52. The state in which the green tire T is shaping is shown, and the central mechanism 58 is provided in the center of the lower mold attaching member 52 through the guide sleeve 59.

The center mechanism 58 includes a lift member 60 fitted with a lifting material in the guide sleeve 59, a center post 61 embedded with a lifting material in the lift member 60, and a lift member upward in the extension direction. And a second cylinder device 63 disposed below the 60 and a first cylinder device 64 arranged on the side of the second cylinder device 63 in a downward direction. The bottom ring 68 holding the bottom of the bladder 67 is maintained at the upper end of the 60, the upper ring 69 is held at the upper end of the bladder 67 at the upper end of the center poster 61. It is.

The tip of the piston rod 64a of the first cylinder device 64 and the second cylinder device 63 are connected by a connecting member 72 to extend and extend the piston rod 64a of the first cylinder device 64. By reducing, the lift member 60 moves down and rises together with the center post 61, and the center post 61 rises and falls alone by extending and contracting the piston rod 63a of the second cylinder device 63. It is.

Next, the operation of the center mechanism of the tire vulcanizer having such a configuration will be described.

The bladder 67 is tensioned in the extended state on the center of the lower die 53, with the lift member 60 at the lowest position and the center post 61 at the highest position.

The green tire T is seated on the lower die 53 by lowering the loader 55 holding the green tire T by the chuck 54.

When the green tire T is seated, a pressure fluid such as steam or hot gas is introduced into the bladder 67 to lower the sensor post 61 while expanding the bladder 67 to lower the upper ring 69.

Then, the bladder 67 is added to the inner surface of the green tire T while being gradually curved, and the shading is performed by bringing the bladder 67 into close contact with the inner surface of the green tire T.

When shaping is completed, vulcanization molding is performed by closing the upper mold (not shown) to the lower mold 53. When the vulcanization is finished, the prize die is raised.

Then, by lifting the lift member 60 together with the center post 61, the vulcanized completed tire T is lifted up by the lower die 53.

Then, the center post 61 is raised, the lift member 60 is lowered, and the bladder 67 in close contact with the inner surface of the vulcanized tire T is peeled off in a withdrawal shape. One cycle of vulcanization is completed by taking out (T) to the outside.

[Problem to Solve Invention]

In the tire vulcanizer center mechanism 58 described in the related art, the second cylinder device 63 for elevating the center post 61 alone with respect to the lift member 60 has the lift member 60 upward. Since it is arrange | positioned in the lower part of (), the 2nd cylinder apparatus 63 and the 1st cylinder apparatus 64 arrange | positioned at the side of the 2nd cylinder apparatus 63 protrude largely under the base frame 51. FIG. Therefore, in the installation of the tire vulcanizer, the pit 75 is deeply drilled on the floor and the cylinder units 63 and 64 are accommodated in the pit. However, the deeper the pit, the more cost is required for the foundation work. Have. In addition, when the tire vulcanizer is transported, the cylinder devices 63 and 64 protruding from the lower part of the frame are hindered, so that a special mount for transport is required.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the prior art, and its object is to change the arrangement of the cylinder device so that the protrusion of the cylinder mechanism is lowered so that the tire device can be accommodated in the press frame during transportation. It is to provide a central mechanism of the flag.

[Means for solving the problem]

In order to solve the above object, the center mechanism of the tire vulcanizer of the present invention is fixed to the hub of the bladder lower portion is installed on the upper side of the cylinder sliding the vertical guide portion installed in the press frame, to maintain the bladder A tire vulcanizer center mechanism in which a center post is caused to slide the hub center hole, wherein a cylinder device having a rod upward is provided between the hub and the center post, and the hole through which the rod of the cylinder device passes is guided. It was opened around the part.

[Action]

Shortening the rod of the cylinder device raises the center post relative to the hub and lowers the center post when the rod extends. Since the center post and the cylinder device are arranged in parallel, when the hub is raised and lowered, the cylinder device and the entire center post may be lifted and there is no protruding downward from the center post.

The rod of the cylinder device may be shortened and stored in the frame with the center post raised.

EXAMPLE

Best Mode for Carrying Out the Invention Embodiments of the present invention will be described below with reference to the drawings.

1 is a cross-sectional view of the center mechanism of the tire vulcanizer of the present invention, and FIG. 2 is a cross-sectional view showing the attachment state of the bladder assembly to the center mechanism.

In Fig. 1, 34 is a press frame, 52 is a lower mold attachment member, 2 is a center mechanism, 3 is a center post, and 4 is a hub.

The hub 4 has the flange 4b, and has the structure which protruded the cylinder 4c below the flange 4b.

A hole 34a is drilled above the press frame 34, and the guide member 30 is attached over the hole 34a.

The cylinder 4c is guided by the sliding material in the upper and lower holes 30a of the guide member 30. Therefore, the cylinder 4c has a length which does not come off from the up-and-down hole 30a within the stroke range of the lever 33 by the cylinder device 36 mentioned later.

The center post 3 is provided as a sliding material in the center hole 4a of the hub 4, and the lower end is a flange 31e.

The two hydraulic cylinders 31 and 31 are fixed to the lower end of the cylinder body on both sides of the flange 31e, and the end bracket 31b of the rod 31a of the hydraulic cylinders 31 and 31 passes through the heat insulating plate 31c. It is fixed to the flange 4b of the hub 4.

That is, since the rod 31a of the hydraulic cylinders 31 and 31 passes through the guide member 30 of the press frame 34, the through hole 30b is formed in the flange portion 30a around the guide member 30. It is open.

Moreover, the pin 32 protrudes in the horizontal direction about the center of the center post 3, and the front-end | tip of the lever 33 is engaged with this pin 32. As shown in FIG. The lever 33 is axially supported on the frame 34 by the pin 35, and the lever 33 is swinged at an angle α by the hydraulic cylinder 36.

That is, when the lever 33 swings, the center post 3 and the hub 4 are integrated to move up and down.

It is also possible to use a cylinder device instead of the lever 33.

Next, the lifting operation of the center mechanism will be described.

FIG. 1 shows a case where the rods 31a of the hydraulic cylinders 31 and 31 are most likely to be installed, and the center post 3 is at the lower limit position with respect to the hub 4. The lever 33 is also swinging downward, and the center post 3 and the hub 4 are set to the lower limit position.

Therefore, the pit 37 should just have a depth which does not interfere in the state shown.

The center post 3 and the hydraulic cylinders 31 and 31 are arranged in parallel, and furthermore, the rod 31a extends to the upper side of the press 34 (near the upper mold attaching member 52), and projects downward of the central mechanism. Is suppressed to a minimum.

In addition, the cylinder main body of the hydraulic cylinders 31 and 31 is located in the lower side, is separated from the upper mold attaching member 52 of the heating source, and limits the amount of heat transmitted through the rod 31a.

When the rod 31a of the hydraulic cylinders 31 and 31 is shortened, the flange 31e and the cylinder body rise, and the center post 3 protrudes upward from the hub 4.

In a state where the hydraulic cylinders 31 and 31 are shortened to the minimum, the flange 31e is positioned above the lower surface 34c of the press frame 34 to be in a stored state.

Moreover, when the lever 33 is rocked upward by the hydraulic cylinder 36, the center post 3 and the hub 4 will be set and raise again.

As a result, the center post 3 and the hub 4 are positioned at the height of the reader by the hydraulic cylinders 31 and 31 and the hydraulic cylinder 36, and the bladder outside the drawing can be inflated to the desired position.

Next, the attachment state of the blender assembly to the above-described center mechanism is explained with reference to FIG. In FIG. 2, 1 is a lower die, 2 is a center mechanism positioned at the center of the lower die 1, 3 is a center post of the center mechanism 3, and 4 is a hub of the center mechanism 2.

Bladder assembly 10 is a top and bottom of the bladder 11, which is a rubber bag sandwiched between the upper ring 12 and the bottom ring 13. The center hole 13a of the bottom ring 13 is fitted to the hub 4 and abuts on the stepped portion of the hub 4 at the flange portion 13b.

The bead ring 13c of the bottom ring 13 is fitted to the lower die 1.

The upper ring 12 has a conical hole 12a at its center, which is positioned in engagement with the conical shaft 3a at the top of the center post 3.

And, the upper end of the upper ring 12 and the center post 3, the chuck 21 of the opening and closing material is installed, and the locking device 22 of the stepping material is installed between the bottom ring 13 and the hub, The bladder assembly 10 is positioned and fixed at the predetermined position of the central mechanism 2 by the 21 and the lock device 22.

In addition, the chuck 210 is a collet chuck, which is a nose 21a and a click 21b for opening and closing material.

The click 21b is connected to the rod 24, pressurized in the direction in which the nose 21a is drawn in by the spring 26, and the nose 21a can be opened by extending the cylinder 28. have.

In addition, the transport apparatus is also accessible for carrying the bladder assembly 10 up to the center mechanism 2 and carrying it to the attachment position shown.

The transport device includes an upper clamp 51 of the opening and closing material for holding the ring groove 12b of the upper ring 12, a lower clamp 52 of the opening and closing material for holding the bead ring 13c of the bottom ring 13, and The arm 53 with the upper and lower clamps 51 and 52 protruding, and the elevating means for moving the arm 53 into and out of the center mechanism 2 and as the lifting and lowering material with respect to the center mechanism 2 ( 54).

The bladder assembly 11 is gripped by the upper and lower clamps 51 and 52 in the air, advances directly above the center mechanism 2 by the forward and descending means 54, and descends toward the center mechanism 2 to automatically move. It becomes an attachment position as shown. At this time, the chuck 21 is open and the locking device 22 is in the open position. When the chuck 21 is closed and the lock device 22 is in the locked position, the bladder assembly 11 is automatically attached to the central mechanism 2.

Disassembly and removal of the bladder assembly 11 are automatically performed in the reverse order to the above.

In addition, the center mechanism 2 to which the bladder assembly 10 is attached can suppress the bladder 11 at a desired height to expand the bladder in the green tire T as shown in FIG. 3. .

[Effects of the Invention]

Since the center mechanism of the present invention has a minimum length of downward projection by a cylinder device arranged in parallel with the center post, the pit can be made shallower in the installation of the tire vulcanizer, and the cost of foundation work can be reduced. It becomes possible.

In addition, since the center mechanism can be stored in the press frame with the cylinder device shortened, no special mount is prepared, and transportation and the like become easy.

Claims (1)

A tire vulcanizer for fixing a hub in which the lower part of the bladder is held on the upper side of the cylinder for sliding the up and down guide part installed in the press frame, and a center post for holding the bladder upper part for sliding the center hole of the hub. In the center mechanism of the tire vulcanizer, a cylinder device having a rod upward is provided between the hub and the center post, and a hole through which the rod of the cylinder device passes is opened around the guide portion. Instrument.