JPH0442169B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a Prada clamp device for a tire vulcanizer in which the lower end of a bladder is detachable. Conventional bladder clamp devices use a screw mechanism to raise and lower the lower ring, but when a screw mechanism is used to move the lower ring that holds the lower end of the bladder so that the lower end of the bladder can be attached and removed for storing the bladder. The mechanism became complicated and problems often occurred.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a bladder clamp device for a tire vulcanizer that can move the lower ring that holds the lower end of the bladder using a simple mechanism so that the lower end of the bladder can be attached and detached. This was done as a.

Therefore, the present invention provides a bladder clamp device for a tire vulcanizer that is disposed at the center of a lower mold of a tire vulcanizer and clamps the lower end of the bladder by pressing the lower ring. A bladder clamp device for a tire vulcanizer is provided, which is characterized in that it is connected to a rod of a cylinder.

Hereinafter, the present invention will be explained according to embodiments shown in the drawings.

A heat insulating material 2, a lower heating plate 3, and a lower mold 4 are fixed to the upper surface of a base 1 of a tire vulcanizer with bolts.

The outer cylinder 5 has a cylindrical shape, and a flange on the upper part of the outer surface of the outer cylinder 5 is fitted into a hole provided in the lower hot plate 3. The lower surface of the outer cylinder 5 is a flat plate provided with necessary holes, and two fluid pressure cylinders 6 are fixed to the flat plate with bolts 7, and the rods of the fluid pressure cylinders 6 pass through the holes. The inner cylinder 8 has a cylindrical shape and has a lower bead ring 9 on the upper part of the outer periphery.
is attached by a bayonet or screw connection, and the rod tip of the fluid pressure cylinder 6 is screw connected to the lower end of the inner cylinder 8. The clamp ring 10 has a shape in which large and small cylinders are combined into one body, and the lower clamp portion of the bladder 11 is adapted to the upper inner surface of the clamp ring 10. The outer periphery of the lower ring 13, whose inner and outer surfaces of the large-diameter cylinder of the clamp ring 10 are loosely engaged, has a shape that matches the lower clamp portion of the bladder 11. A hole is provided in the center of the lower ring 13, a center post cylinder 14 is inserted into the hole, and an upper flange 14a of the center post cylinder 14 is fixed to the lower ring 13 via bolts 15. The hole 28 in the lower ring 13 is an inlet/outlet for a heat medium for vulcanization.

The upper end of the rod 14c, which engages with a bush 14b provided on the upper inner periphery of the center post cylinder 14, is screwed to the bladder clamp 16.

The bladder presser 17 fixes the upper clamp portion of the bladder 11 using a plurality of bolts 18.

A bracket 19 is fixed to both sides of the outer surface of the base 1 with bolts 20, and two fluid pressure cylinders 22 are connected to one end using a pin 21, and a clevis 22a at the tip of the rod of the fluid pressure cylinder 22
is connected to the beam 24 using a pin 23, and the clevis 12a at the lower end of the rod 12 is connected to the beam 24 using a pin 25. The upper end of the rod 12 passes through a hole in the flat plate of the outer cylinder 5 and is screwed to the lower end of the clamp ring 10. A square hole is made in the center of the beam 24 and the fluid pressure cylinder 26 is inserted, and the flange of the fluid pressure cylinder 26 is connected to the bolt 2.
7 to the beam 24. The rod 26a of the fluid pressure cylinder 26 is screwed into a screw hole provided in the bottom plate 14d at the lower end of the center post cylinder 14.

The left side of the drawing shows a state where the fluid pressure cylinder 26 is moving downward using the control device, and the lower ring 13 receives downward force and fixes the lower clamp portion of the bladder 11. When the fluid pressure cylinder 26 is moved upward, the lower ring 13 rises as shown on the right side of the drawing.
The lower clamp portion of the bladder 11 is opened. After that, by removing the bolt 18 and the bladder pusher 17, the bladder 11 can be easily removed. Next, if you want to install the bladder, just do the opposite of the above.

As shown in the embodiments above, the attachment and detachment of the bladder 11 is
This can be easily done with the fluid pressure cylinder 26, and with the conventional mechanical method, the operator has to rotate the screw mechanism with an air torque wrench, which takes time and labor, and it is not possible to automate this with a motor or the like. However, the fluid pressure control valve to the fluid pressure cylinder 26 can now be operated by operating a push button, etc., which could not be realized due to space issues or economical reasons, which saves labor in attaching and detaching the bladder. .

Further, as is clear from the embodiments, the structure is extremely simple, and an economical and easy-to-maintain structure is realized.

[Brief explanation of the drawing]

The figure is a sectional view showing an embodiment of the present invention. 4...Lower mold, 9...Lower bead ring, 10...
... Clamp ring, 11 ... Prada, 13 ... Lower ring, 14 ... Center post cylinder, 26 ...
...Fluid pressure cylinder, 26a...rod.

Claims (1)

[Claims] 1 Located at the center of the lower mold of the tire curing machine,
A bladder clamping device for a tire vulcanizer in which the lower end of a bladder is held and clamped by a lower ring, characterized in that the lower ring is connected to a rod of a fluid pressure cylinder so that the lower ring moves up and down. Bladder clamp device.