JPS6059843B2 - Tire curing press equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tire vulcanization press device with a new structure that can be used for vulcanization molding of various tires to ensure long-term stability of performance and ease of maintenance management.

In the vulcanization press treatment of pneumatic automobile tires, a thick rubber bag called a vulcanizing bladder is inserted into the green tire, and a heating medium for vulcanization is pressurized into the bladder to form the green tire from the inside. A press that performs vulcanization under pressure and heat is generally used, but (a) the life of the vulcanization plug is extremely short and must be replaced repeatedly;
(Ex) Replacement requires a lot of manpower and time, leading to a decrease in productivity; (C) The part that clamps the vulcanized plug is located in a narrow space, making it inconvenient to handle; However, it has various drawbacks such as the fact that the drive mechanisms associated with each part are located in convergent areas of the mechanical parts, making maintenance management very troublesome, which makes it impractical. It was hot.

In particular, regarding item (a), as shown by the dotted line in Figure 4, the lower clamp part 9'' that clamps the lower edge of the vulcanized plug 1'' is the entire part of the plug storage tube including the bent part of the vulcanized plug 1''. 1 Because the structure is such that it is lowered with a full stroke so as to sink into the inside (see Figure 5), the area in contact with the inner wall surface of the bura storage tube 1 is wide, which not only causes accelerated wear.
One possible cause is that cracks are likely to occur due to forcible folding.

Regarding the issue of the bladder clamp part in item (c),
As shown in Fig. 5, a clamp ring 3'' with a bladder clamp portion 9'' coaxially arranged vertically and a register ring 25
The register ring 2'' is screwed to the lifting bracket 14'', while the clamp ring 3'' is screwed to the register ring 2'' through a bolt B inserted upward. It is only by removing the bolts and loosening and removing the register ring 2'' that it is possible to remove the lower edge of the vulcanized plug 1''. Needless to say, the workability was very poor because it had to be done in a vacuum.

The present invention has been made for the purpose of providing an improved device capable of eliminating the drawbacks of such conventional devices, and its aspects will be described below in an example shown in the accompanying drawings. ! It will be revealed later.

Hereinafter, the content of the present invention will be explained in detail with reference to FIGS. 1 to 4. The overall structure of a tire curing press device to which the present invention is applied is, for example, disclosed in Japanese Patent Application Laid-Open No. 51-1728. Since it is well known as shown in the official gazette, the following explanation will be omitted and only the applicable portion will be described in detail.

The tire curing press device to which the device of the present invention belongs has a clamping portion 8 that tightly clamps a vulcanizing plug 1 with a clamp portion 9 at the open peripheral edge of the vulcanizing plug, and a clamp portion 8 consisting of an upper holding ring 4 and an upper clamp ring 5 at the center of the upper end. The heating medium for vulcanization is press-fitted into the cavity formed by the vulcanizing plug 1 by tightly sandwiching the vulcanizing plug 1.

As shown in FIG. It can be raised and lowered by

When vulcanization is completed, as is well known, both the clamp parts 8 and 9 of the vulcanized plug 1 are pulled down and the plug housing cylinder 10 is removed.
By inserting and storing the vulcanized plug 1 inside, the tire T and the vulcanized plug 1 are separated.

The plug storage cylinder 10 is attached to the lower dome 1 by the flange 10a.
It is fixed concentrically to the inner circumferential surface of the central hole of No. 1 by bolting or other means. A pair of fluid pressure cylinders 7 are provided at the front and rear for raising and lowering the lower end peripheral edge clamp part 9,
It is fixed to the bottom of the vulcanization press space 12 by means such as bolt tightening, and the tip of the piston rod 13 is fixed to the bottom of the lifting bracket 14, and as the piston rod 13 moves back and forth, the lower end peripheral clamp part 9 can be raised and lowered.

However, in the conventional device, the fluid pressure cylinder 7 was located on the front and rear inside of the base portion 12, so the base portion 12
However, in the present invention, by arranging the cylinders 7, 7 on the outside of the vulcanization press space 12 in the front and back direction, the above problem has been solved. We are trying to eliminate the problem.

On the other hand, the piston rod 15 of the fluid pressure cylinder 6 has its tip slidably penetrated into the central gland portion 17 of the lower ring 16, and the upper retaining ring 4 is fixed to the tip of its upper end extension. , and an upper clamp ring 5, the upper end center portion of the vulcanizing plug 1 is held and clamped from above and below.

The clamp portion 18 located at the center of the upper end of the vulcanizing plug 1 is movable up and down by the fluid pressure cylinder 6, as described above.

Further, the fluid pressure cylinders 7, 7 can raise and lower the lower end peripheral clamp portion 9 of the vulcanized plug 1 together with the clamp portion 8.

Note that the lower end peripheral clamp portion 9 is connected to the bracket 1 which is raised and lowered within the plug storage cylinder 10 by the fluid pressure cylinders 7, 7.
4, and a lower clamp ring 3 which is mechanically integrated with the main body of the hydraulic cylinder 6 for the upper end central clamp part 8 and is disposed above and coaxially with the register ring 2. The rings 2 and 3 are designed to hold the open ear at the lower end of the vulcanizing plug.

The vulcanized plug 1 clamped at the upper and lower ends in this manner is pulled into and stored in the plug storage cylinder 10 before and after vulcanization, but the vulcanized plug 1 is
When moving up and down inside the register ring 2, the outer peripheral edge of the register ring 2 moves up and down smoothly with a slight gap between the inner wall of the plug storage cylinder 10.

18 is a stopper inserted between the bottom surface of the bracket 14 for raising and lowering the clamp portion 9 and the upper surface of the vulcanization press space, and is a stopper that is inserted between the bottom surface of the bracket 14 for raising and lowering the clamp portion 9 and the top surface of the vulcanization press space. The force exerted by the pressure on the lower clamping part 9 of the vulcanizing plug 1 can be reliably and sufficiently received by the shaped stopper 18.

This [shaped stopper 18] is formed so that its pocket can move toward and away from the center of the device where the fluid pressure cylinder 6 is provided, and this movement toward and away from the center of the device is controlled by the operation of the fluid pressure cylinder 19. It has been carried out.

However, in conventional devices of this type, the fluid pressure cylinder 19 was placed at the rear of the vulcanization press space, making it difficult for workers to reach and maintenance was troublesome. In the apparatus according to the invention, this is arranged in front of the vulcanization press space, thereby making maintenance work such as inspection and adjustment very easy.

Reference numerals 20 and 21 indicate plate-shaped stoppers, which are installed on the upper surface of the bottom plate of the vulcanizing press space 12, and these plate-shaped stoppers 20 and 20 have shapes corresponding to the different sizes of the vulcanizing plugs 1, respectively. A plurality of parts are attached to the press device, and the required parts can be selectively installed in the above-mentioned position along the side plate of the vulcanization press space so that they can be replaced. .

To explain the action of the stoppers 20, 20, when the fluid pressure cylinder 7 is actuated and the piston rod 13 is lowered, the lower bottom surface of the bracket 14 fixed to the tip of the rod 13 is connected to the upper surface of the plate-shaped stopper 20. The movement of the bracket 14 is restricted as a lowering limit that prevents the bracket 14 from descending any further.

Therefore, the downward stroke of the register ring 2 that moves up and down integrally with the bracket 14 is limited, and the clamp portion 9
does not fall to the stroke limit of the hydraulic cylinders 7, 7, and is stopped at a position suitable for the vulcanizing plug 1.

Therefore, the lower limit position at which the longest life is achieved by the expansion and convergence of the vulcanized plug 1 when both the clamps 8 and 9 are raised and lowered together depends on the size of the vulcanized plug 1. It is natural that the size of the vulcanized plug 1 will vary, and furthermore, the lowering position of the clamp portion 9 to allow the vulcanized plug 1 to be smoothly removed from the vulcanized tire will also vary depending on the size of the vulcanized plug 1. . Therefore, it is necessary to change the dimensions of the plate-shaped stopper 20 according to the size of the vulcanized plug 1 to be used. Therefore, the required number of plate-shaped stoppers 20 with shapes corresponding to each size are equipped in advance, and the necessary ones are installed. I am trying to replace it and install it.

In this case, the lower limit position at which the vulcanized plug 1 has the longest lifespan is determined by examining the actual movement of the plug 1, taking actual measurements, and conducting thorough studies, for example, 3. The lower limit position of each part is determined, and in the present invention, plate-shaped stoppers 20 having different heights as required are manufactured so that they can be replaced at any time.

As is clear from FIG. 4, in the conventional device of this type,
The lower limit position of the lower clamp part 9 in the plug storage tube 10 was fixed at the second position indicated by the dotted line, but in the present invention, the lower limit position can be adjusted as necessary by replacing the plate-shaped stopper 20. , it is possible to change it to the position C.

In addition, in each of these positions, when the vulcanized plug 1 is inserted into the plug storage cylinder 10 so as to be smoothly removed from the vulcanized tire, the lowered position of the clamp part 9 is near the upper limit level of the allowable range. It goes without saying that each of the above-mentioned positions A to C should be set at such an appropriate position.

Next, we will explain the configuration of the elevating mechanism that was created to facilitate the replacement of new and old vulcanizing plugs. A fluid pressure cylinder 6 for raising and lowering the upper clamp part 8 in FIG.
The bottom cap 21 on the main body side and the lower clamp ring 3
The clamp ring 3 and the cylinder 6 body are integrated by connecting them by an extended threaded rod 31.

Further, the bottom cap 21 is connected to a vertically installed threaded rod 22.
is in contact with the lower surface, and the threaded rod 22 is screwed into a female threaded bearing 26 fixed to the vulcanization press space, and
A sprocket wheel 23 is fitted to the lower free end of the sprocket wheel 23, and when the sprocket wheel 23 is rotated clockwise or counterclockwise, the threaded rod 22 is raised and lowered, thereby raising and lowering the fluid pressure cylinder 6 and the clamp ring 3. can be done.

A sprocket wheel 25, which is provided as a pair with the sprocket wheel 23, is fitted onto a vertical shaft 28 supported by a bearing 26 in front of the vulcanizer, and a chain 27 stretched between both wheels 23, 25. through wheel 2
5 is transmitted to the wheel 25.

The upper end of the vertical shaft 28 is formed into a square rod so that a lower end socket 29a of the shaft 29, which is disposed concentrically with respect to the shaft 28, is fitted into the upper end.

On the other hand, as described above, the shaft 29 extends upward concentrically with the vertical shaft 28, and its tip is supported via a bearing on the lower surface of a fixed base on which the dome of the vulcanizing press device is placed. The upper tip is a square bar into which the socket of the air wrench fits.
Note that a spring 30 is loosely fitted to the shaft 29, and normally acts to push up the shaft 29 upward and release the connection with the vertical shaft 28. I wanted to combine them. This can be done by pushing down the shaft 29 against the elasticity of the spring 30.

By connecting the shaft 29 and the vertical shaft 28 by a lifting mechanism consisting of a series of mechanical power transmission systems configured as described above, and applying rotational force to the shaft 29 with an air wrench, the vertical shaft 28, the sprocket wheel 25, the chain 27, Via the sprocket wheel 23, it is transmitted to the threaded rod 22 as a mechanical force converted into linear motion, and as a result, the threaded rod 22 moves up and down,
Therefore, as described above, the hydraulic cylinder 6 and the clamp ring 3 move up and down together.

However, when replacing a new or old vulcanizing plug, when removing a used vulcanizing plug, use the set bolt (bolt B in Fig. 5, not shown) to secure the resistor ring 2 and clamp ring 3. After removing the vulcanized plug (which corresponds to It can be easily removed by pulling out the open ears.

On the other hand, in order to install a new vulcanized plug, operate the elevating mechanism to push up the clamp ring 3, place the lower open ear part of the vulcanized plug on top of the register ring 2, and use an air wrench to lift the clamp ring 3 upward. While lowering the clamp ring 3 together with the fluid pressure cylinder 6 for the clamp part 8, the lower end opening ear part is pushed in, and after being pushed in sufficiently, it is fixed with the set bolt.

According to such a replacement means, the lower open ear portion of the vulcanized plug 1'' is clamped between the register ring 2'' and the clamp ring 3'' outside the machine, and the lower end ring is suspended into the vulcanizer. Compared to the conventional device (see FIG. 5), which requires the procedure of screwing into the holder 16, the replacement work is extremely simplified.

The present invention has the structure and operation as clarified by the explanation based on the embodiments described above, and has the advantage that the life of the vulcanized plug 1 is extended, thereby reducing the number of replacement operations.

In addition, the work of replacing the vulcanizing plug 1 and the inspection and maintenance work of the fluid pressure cylinders 7 and 19 in each part are greatly facilitated, and this is an invaluable tool that increases the operating efficiency of the equipment and improves productivity. It exhibits various excellent practical features, such as being able to save labor in terms of maintenance.

[Brief explanation of the drawing]

1 to 3 show essential parts of an embodiment of the device of the present invention, in which FIG. 1 is a longitudinal sectional front view, FIG. 2 is a plan view taken along the line A-A in FIG. 1, and FIG. 3 is a plan view taken along the line B--B.

Claims (1)

[Claims] 1. The clamp part 8 at the center of the upper end of the vulcanizing bladder 1 is movable up and down by the fluid pressure cylinder 6, and the clamp part 9 at the periphery of the lower end is moved together with the upper center clamp part 8 by another fluid pressure cylinder 7, When the vulcanizing bladder 1 is raised, the vulcanizing heat medium is supplied into the bladder 1, and at the raised position, the green tire is inserted into the inside of the green tire from below. At the same time, when vulcanization is completed, both the clamp parts 8 and 9 are lowered and the heat medium for vulcanization is discharged, and the vulcanizing bladder 1 is connected to the fluid pressure cylinder 6 below. This is a tire vulcanizing press device which is housed in a coaxial bladder storage tube 10, in which the fluid pressure cylinders 7, 7 for the lower end peripheral clamp portion 9 are connected to the base portion 12 of the vulcanizing press device.
A plurality of plate-shaped stoppers 2 are provided at the front and rear outer open portions of the vulcanizing bladders 1, respectively, and correspond to vulcanizing bladders 1 of different sizes.
0, 20, and necessary ones of the stoppers 20, 20 are replaceably and selectively installed near the main bodies of the fluid pressure cylinders 7, 7 for the lower end peripheral edge clamp portion 9. The stopper 20 can regulate the lowering position of the clamp part 9 to be close to the upper limit level of the allowable range when the vulcanized bladder 1 is stored in the bladder storage cylinder 10 so as to be able to be smoothly removed from the vulcanized tire. On the other hand, the register ring 2 is fixed to the bracket 14 which can be moved up and down within the bladder housing cylinder 10 by the fluid pressure cylinders 7, 7.
and a lower clamp ring 3 which is mechanically integrated with the main body of the fluid pressure cylinder 6 for the upper end central clamp part 8 and is disposed above coaxially with the register ring 2. By configuring the lower end peripheral edge clamp part 9 that clamps the lower end opening ear part and making it possible to raise and lower the fluid pressure cylinder 6 by a lifting mechanism provided below, the spacing between the rings 2 and 3 can be reduced when raised. The clamping action is released by widening, and the clamping action is performed by narrowing the interval when descending, and furthermore, the pressing force generated on the lower end peripheral clamp part 9 is supported by the steam, hot water, and cooling water necessary for tire vulcanization. A tire vulcanizing press device characterized in that a fluid pressure cylinder 19 for activating and inactivating a stopper 18 provided at the base portion 12 is provided at an open portion near the front of the base portion 12.