JPH0583049B2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a tire vulcanizer.

(Prior Art) A conventional tire vulcanizer will be explained with reference to FIG. 5. 01 is a base, 02 is a frame erected on the base 10, and 02a is a plurality of frames projecting outward from the top of the frame 02. 03 is a plurality of fluid pressure cylinders (pressurizing means), 03a is a clevis attached to the upper end of the piston rod of each fluid pressure cylinder 03, and 03c is a pin that pivots the clevis 03a to the lug 02a. , 030 is the lower ring, 03
0a is a rib protruding inward from the lower end of the lower ring 030, 030b is a claw provided on the inner surface of the upper end of the lower ring 030, and 03d is the fluid pressure cylinder 0.
Bolts fixing the flange 03b of No. 3 to the rib 030a of the lower ring 030, 06' the lower heat insulating plate fixed to the upper surface of the frame 02, 06 the lower heating plate fixed to the upper surface, and 07 fixed to the upper surface. Lower mold, 034 is the fluid pressure cylinder, 034a is the clevis attached to the lower end of the piston rod of the fluid pressure cylinder 034, 09 is the bolster, 09a is the lug fixed to the bolster 09, 033 is the clevis 034a attached to the same ear. The pin that pivots to gold 09a,
010' is an upper heat insulating plate fixed to the bolster 09,
010 is the upper hot plate fixed to its lower surface, 011 is the upper mold fixed to its lower surface, 031 is the upper ring, 0
31a is a stepped portion formed at the upper end of the upper ring 031, and the upper ring 031 is rotatably supported by engaging the stepped portion 031a with the stepped portion of the bolster 09. In addition, 031b is a claw provided on the outer surface of the lower end of the same ring 030, 031c is a pin provided on the top surface of the same ring 031, 032 is a fluid pressure cylinder attached to the frame, and 032a is a tip of the piston rod of the same fluid pressure cylinder 032. With the attached clevis, the clevis 032a is pivotally supported by the upper ring 031 via the pin 031c, and the green tire is set in the lower mold 07, and the fluid pressure cylinder 034 is operated in the extension direction. Bolster 09, upper heat insulation plate 010' and upper heating plate 0
10, the upper mold 011, and the upper ring 031 are lowered, the upper mold 011 is placed on the lower mold 07, and then the fluid pressure cylinder 032 is operated in the extension direction,
A claw 031b is provided on the outer surface of the lower end of the upper ring 031 by rotating the upper ring 031 around the vertical axis.
A claw 030 provided on the inner surface of the upper end of the lower ring 030
b, then actuate the fluid pressure cylinder 03 in the extension direction, and move the movement from the lower ring 030 → upper ring 031 → bolster 09 → upper heat insulating plate 010' →
The heat is transmitted to the upper mold 011 via the upper hot plate 010, the same mold 011 is lowered, and the same mold 011 is pressed and brought into close contact with the lower mold 07, thereby vulcanizing the green tire. Also, when vulcanization is finished, the fluid pressure cylinder
3 in the contraction direction, and the movement is controlled by the lower ring 03.
0, loosens the engagement between the claw 30b provided on the inner surface of the upper end of the lower ring 030 and the claw 31b provided on the outer surface of the lower end of the upper ring 031, and then operates the fluid pressure cylinder 032 in the contraction direction, Upper ring 03
1 is rotated about the vertical axis in the opposite direction to the above, and a claw 0 provided on the outer surface of the lower end of the same ring 031 is attached.
31b from the claw 030b provided on the inner surface of the upper end of the lower ring 030, and then remove the hydraulic cylinder 034.
is operated in the contraction direction, and the bolster 09 and upper insulation plate 0
10', upper hot plate 010, upper mold 011, and upper ring 031, and move upper mold 011 to lower mold 0.
7, and then the vulcanized tire is taken out from inside the lower mold 07.

(Problems to be Solved by the Invention) The quality of the tire vulcanized by the tire vulcanizer is influenced by the pre-inflation (referred to as shaping) of the green tire when the upper mold 07 and the lower mold 011 are in close contact with each other. However, if the green tire is excessively inflated, it will be caught between the upper mold 07 and the lower mold 011, and if the degree of inflation is too low, the green tire will not be uniformly expanded. do not. Therefore, it is desirable to visually observe the condition of the green tire until just before the upper mold 07 and lower mold 011 come into close contact.
In the conventional tire vulcanizer shown in the figure, there are an upper ring 031 and a lower ring 030 on the outside of the upper mold 07 and the lower mold 011, making it difficult to visually observe the condition of the green tire.

The present invention has been proposed in view of the above-mentioned problems, and its purpose is to provide a tire vulcanizer that allows the condition of a green tire to be visually observed until just before the upper mold and lower mold come into close contact with each other. The point is to try.

(Means for Solving the Problems) In order to achieve the above object, the present invention arranges upper and lower bolsters inside a frame having a substantially rectangular upper beam in plan view, and provides upper and lower bolts for the upper and lower bolsters. The molds are fixed to each other, and a pressure means is provided between the frame and the lower bolster to press the lower mold to the upper mold, and a pressure holding means and the mold are provided between the upper bolster and the upper beam. In a tire vulcanizer equipped with a thickness adjusting means, the pressurizing force holding means is
a polygonal pressure receiving plate having a short part that can pass vertically between the upper beams and a long part that cannot pass vertically between the upper beams; It is constituted by a rotation drive means for rotating around the center.

(Function) The tire vulcanizer of the present invention is configured as described above, in which the rotation drive means of the pressure holding means is operated to rotate the pressure receiving plate to a position where it can pass between the upper beams, and then the upper metal plate is rotated to a position where it can pass between the upper beams. The mold elevating drive means is activated to raise the pressure plate, upper bolster, and upper mold, and the upper mold is separated from the lower mold to take out the vulcanized tire from the lower mold, and then to remove the green tire. The inside of the lower mold is set, and then the upper mold raising/lowering driving means is operated to lower the pressure receiving plate, upper bolster, and upper mold, and the upper mold is placed on the lower mold, and then the pressurizing force is applied. The rotation driving means of the holding means is operated to rotate the pressure receiving plate to a position where it cannot pass between the upper beams, and then the pressurizing means is operated to raise the lower bolster and the lower mold, and the lower mold is The green tire is vulcanized by pressurizing and bringing it into close contact with the upper mold.

(Example) Next, the tire vulcanizer of the present invention will be explained using an example shown in FIGS. 1 to 4. 1 is a base;
2 is a frame erected on the base 1, 3 and 3 are fluid pressure cylinders, 4 is a bolt for fixing each of the fluid pressure cylinders 3 to the lower part of the frame 2, and 5 is a piston rod of each of the fluid pressure cylinders 3. A lower bolster fixed to the upper end, 6 a lower heating plate fixed to the upper surface of the lower bolster 5, and 7 a lower mold fixed to the upper surface of the lower heating plate 6.
and the lower mold 7 are movable up and down with respect to the frame 2. Further, 9 is an upper bolster, 10 is an upper hot plate fixed to the lower surface of the same bolster 9, and 11 is the same hot plate 1.
8, an upper mold fixed to the lower surface of the frame 2; Reference numeral 8 denotes a fluid pressure cylinder fixed on each pedestal 2b with a bolt 28, and the lower end of the piston rod 8a of each fluid pressure cylinder 8 is screwed into the upper bolster 9. In addition, the pressure receiving plate 24 is a polygonal pressure receiving plate, and the pressure receiving plate 24 is formed into a scalene octagon, and the short diameter portion can pass vertically between the upper beams 2a, 2a, as shown in FIG. However, as shown in FIG. 3, the long diameter portion cannot pass between the upper beams 2a, 2a in the vertical direction.
Further, 17 is a rod passing through a vertical hole provided in the center of the pressure receiving plate 24, 19 is two ball bearings interposed between the rod 17 and the vertical hole, and 15 is the rod 1.
A right-handed threaded ring fixed to the lower end of 7, a female threaded ring 14a screwed onto the right-handed threaded ring 15, and 14a.
13 is a left-handed threaded ring screwed onto the female-threaded ring 14, and the left-handed threaded ring 13 is fixed to the upper bolster 9 by bolts 12.
Reference numeral 16 denotes a plurality of guide members fixed to the right-hand threaded ring 15, each of which passes through a vertical hole provided in the upper part of the left-hand threaded ring 13. Further, 29 is a bush inserted between the guide member 16 and the vertical hole provided in the upper part of the left-hand threaded ring 13, and 18 is a bush inserted between the pressure receiving plate 24 and the right-hand threaded ring 1.
The disc spring 18 is interposed between the disc spring 5 and the disc spring 18.
It has a spring force larger than the weight of the pressure receiving plate 24, and transmits the rotation of a drive source (not shown) to the chain wheel 14a of the female threaded ring 14 through a chain (not shown) to rotate the female threaded ring 14. death,
The right screw ring 15 is raised and lowered to adjust the gap A between the pressure receiving plate 24 and the right screw ring 15 and the gap B between the pressure receiving plate 24 and the upper beam 2a. Further, 20 is a spacer fitted around the rod 17, 21 is an arm, 22 is a key for fixing the arm 21 to the upper end of the rod 17, and 23 is a connection between the head of the rod 17 and the arm 2.
1, a retaining ring 25 is a pin provided upright on the pressure receiving plate 24, 26 is a fluid pressure cylinder, and the clevis of the piston rod of the fluid pressure cylinder 26 is pivotally supported by the pin 25. ing. A pin 27 pivots the other end of the fluid pressure cylinder 26 to the other end of the arm 21.

Next, the operation of the tire vulcanizer shown in FIGS. 1 to 4 will be explained in detail. Put the raw tire into the lower mold 7
the pressure receiving plate 24 and the right-hand threaded ring 15.
A gap A is formed between the pressure receiving plate 2 and the pressure receiving plate 2.
4 and the upper beam 2a, the fluid pressure cylinder 26 is actuated in the contraction direction, the movement is transmitted to the pressure receiving plate 24 via the pin 25, and the pressure receiving plate 24 is moved to the rod. 17 to the position shown in FIG. 2, that is, to a position where it can pass vertically between the upper beams 2a, 2a, and then actuates the fluid pressure cylinder 8 in the contraction direction to connect the pressure receiving plate 24 and the right-hand screw. Ring 15, female thread ring 14, left thread ring 13, upper bolster 9, upper hot plate 10, and upper mold 11
the upper mold 11 is separated from the lower mold 7, the cured tire is taken out from the lower mold 7, the green tire is set in the lower mold 7, and then the hydraulic cylinder 8 is opened. The pressure receiving plate 24 operates in the direction of extension.
The right-hand threaded ring 15, the female threaded ring 14, the left-hand threaded ring 13, the upper bolster 9, the upper hot plate 10, and the upper mold 11 are lowered, the upper mold 11 is placed on the lower mold 7, and then the fluid pressure is lowered. The cylinder 26 is actuated in the extension direction, and the movement is transmitted to the pressure receiving plate 24 via the pin 25, and the pressure receiving plate 24 is moved up and down between the upper beams 2a and 2a to the position shown in FIG. 3 with the rod 17 as the center. The hydraulic cylinder 3 is then operated in the extension direction to raise the lower bolster 5, the lower hot plate 6, and the lower mold 7, and the lower mold 7 is moved to the upper mold. The green tire is vulcanized by pressurizing and bringing it into close contact with the mold 11.

(Effects of the Invention) The tire vulcanizer of the present invention operates the rotary drive means of the pressure holding means as described above to rotate the pressure receiving plate to a position where it can pass between the upper beams, and then drives the upper mold up and down. The means is actuated to raise the pressure plate, upper bolster, and upper mold, separate the upper mold from the lower mold, take out the vulcanized tire from the lower mold, and then place the green tire into the lower mold. Then, the upper mold raising/lowering driving means is operated to lower the pressure receiving plate, upper bolster, and upper mold, and the upper mold is placed on the lower mold. The rotation driving means is operated to rotate the pressure receiving plate to a position where it cannot pass between the upper beams, and then the pressurizing means is operated to raise the lower bolster and the lower mold, and then move the lower mold to the upper mold. Since the raw tire is vulcanized under pressure and in close contact with the mold, the upper ring and lower ring (the upper ring and lower ring surrounding the upper and lower molds) required in the conventional tire vulcanizer are is unnecessary, and the condition of the green tire can be visually observed until just before the upper mold and lower mold come into close contact.

[Brief explanation of drawings]

Fig. 1 is a front view showing an embodiment of the tire vulcanizing machine according to the present invention, Fig. 2 is a plan view showing a state where the pressure receiving plate can pass through, and Fig. 3 is a plan view showing the state where the pressure receiving plate cannot pass. , FIG. 4 is an enlarged longitudinal sectional side view of a pressure receiving plate portion, and FIG. 5 is a longitudinal sectional side view of a conventional tire vulcanizer. 2...Frame, 2a...Upper beam, 3...
Pressure means, 5...Lower bolster, 7...Lower mold, 9
... Upper bolster, 11 ... Upper mold, 13, 14,
15...Mold thickness adjusting means, 24...Pressure plate of pressurizing force holding means, 26...Rotation driving means.

Claims (1)

[Claims] 1 Upper and lower bolsters are arranged inside a frame having an upper beam that is approximately rectangular in plan view, upper and lower molds are respectively fixed to the upper and lower bolsters, and the lower mold is connected to the upper mold between the frame and the lower bolster. In a tire vulcanizer, the tire vulcanizer is provided with a pressure means for pressurizing and bringing the material into close contact with the upper beam, and a pressure retention means and a mold thickness adjustment means are disposed between the upper bolster and the upper beam. A polygonal pressure receiving plate having a short part that can pass between the upper beams in the vertical direction and a long part that cannot pass between the upper beams in the vertical direction; A tire vulcanizer characterized by comprising: a rotational drive means for rotating the tire.