JPH04146104A - Unloader for tire vulcanizing machine - Google Patents

Abstract

PURPOSE:To enable holding of a tire which has completed vulcanization under a condition of a narrow space by avoiding interference between a holding nail and bladder, by a method wherein levers are hinged on four places of before and behind and right and left in relation to the central position of a vulcanizing machine, the four levers are turned toward the center of the vulcanizing machine, a rod shoe at the lower side of the lever is inserted into the lower side of the tire and then the bladder is extended. CONSTITUTION:When vulcanization is completed, a top force is raised, then a tire lifter 5 is raised and after the tire 6 which has completed the vulcanization is peeled off from a bottom force 3 it is raised to a fixed height. When a cylinder 21 is extended after that, an unloader is moved to the center of a mold. When a cylinder 30 is contracted after that, rods 27b, 31b of levers 27, 31 come into contact with a cam 26 and hold the lower side of the vulcanized tire 6. After the bladder 9 is extended and a cylinder 16 is extended by a fixed quantity after that, when the cylinders 21, 24 are contracted respectively, the tire 6, which has completed the vulcanization, can be transferred to PCI. Since the levers 27, 31 and their respective rods 27b, 31b pass through a narrow space by lowering of the unloader and can hold the tire which has completed vulcanization, a reduction of a cycle time can be expected.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an unloader for a tire vulcanizer.

[Conventional technology]

(1) To remove the vulcanized tire by extending the bladder, a fork is inserted under the bladder to receive the tire, and then the tire is transported to the center of the PCI using a roller conveyor or belt conveyor.

(2) To remove the vulcanized tire by folding the bladder downward, as described in Japanese Patent Application No. 57-123301, for example, grip the bead of the vulcanized tire from the inside and transport it to the center of the connected PCI. are doing.

[Problem to be solved by the invention] The above-mentioned conventional technology has the following problems.

The method (1) requires manpower to operate the forks, transfer to the conveyor, etc., and takes a long time.

Method (2) is to move the vulcanized tire to the center of the PCI.
Although it can be transferred with high precision and in a short time, it cannot be used in a method in which the bladder is extended because the gripping claws and the bladder interfere with each other. Interference can be avoided by gripping the vulcanized tire from the outside, but this was previously thought to be impossible due to space constraints.

[Means for solving the problem] Levers are pivotally attached to the unloader beam of the tire vulcanizer at four locations on the front, rear, left and right sides of the center position of the vulcanizer, and the lower end of the rond protruding from the bottom of each lever is attached to the bottom surface of the tire. A drive device (to open/close (expand/contract) each lever) is provided.
(fluid pressure cylinder). Stops are provided to define the extended and retracted positions of each lever.

[Operation] After tire vulcanization is completed, remove the upper mold and move the unloader beam to the center of the vulcanizer. Raise the tire lifter to lift the vulcanized tire, use the fluid pressure cylinder to rotate the four levers toward the center of the vulcanizer, insert the rod shoe at the bottom of the lever into the bottom of the tire, and then Extend the bladder, raise the unloader beam, and move to the PCI position (
turn) and transfer the tires to the PCI.

5 Examples] In FIGS. 1 to 3, 1 is a frame, 2 is a lower hot plate, 3 is a lower mold, 4 is a bolt, 5 is a tire lifter 16 is a vulcanized tire, 7 is an upper bladder clamp, and 8 is a bolt, 9
is a bladder, 10 is a bolt, 11 is a heath, 12 is a rail, 13 is a linear bearing, 14 is a slide base, 15 is a bolt, 16 is a fluid pressure cylinder, 17 is a beam, 18 is a bottle,
19 is an eye plate, 20 is a bolt, 21 is a fluid pressure cylinder, 22 is a nut, 23 is a bracket, 24 is a fluid pressure cylinder, 25 is a bottle, 26 is a cam, 27 is a lever, 2
8 is a bolt, 29 is an eye plate, 30 is a fluid pressure cylinder, and 31 is a lever.

Fig. 1 is a plan view showing the unloader in the standby position, and Fig. 2 shows the unloader moving to the center of the vulcanizer mold.
FIG. 2 is a plan view showing a state in which a vulcanized tire is being gripped. Figure 3 is an elevational view seen from the cross section of Figure 2.
Both figures 3 to 3 show only the necessary parts of the tire vulcanizer main body.

A lower heating plate 2 is fixed with bolts etc. onto a circular plate 1a integral with a frame 1 made of welded steel plates, and a flange portion of a lower mold 3 is fixed thereto with four bolts 4. A tire lifter 5 passing through the inner hole of the lower mold 3 uses a mechanism not shown in the drawings to peel off the vulcanized tire 6 from the lower mold 3 and increase the required dimension. The upper bladder clamp 7 fixes the bladder 9 using a bolt 8 and extends the bladder 9 using a mechanism not shown. Two rails 12 are attached to the heath 11 fixed to the side plate of the frame 1 with bolts 10 using bolts, etc.
, and the four linear drive wheel bridges 13 that match this are fixed to the slide base 14 using bolts or the like. Heath 1
A fluid pressure cylinder 16 is fixed to a bracket eye 1a provided below 1 using a bolt 15, and its rod tip is screwed and fixed to the lower surface of the slide base 14. The beam 17 has a hole provided at one end thereof and a slide base 14.
They are connected by a pin 18 through a hole provided in the. beam 1
An eye plate 19 is fixed to the female threads at the upper end of two bosses 17a integral with 7 with bolts 20, and its trunnion portion is loosely fitted into a hole provided in the eye plate 19 and a hole provided in the slide base 14. The fluid pressure cylinder 21 is attached to the slide base 1 by screwing the screw at the end of the rod into the nut 22.
The threaded portion of the rod end of the fluid pressure cylinder 24, whose trunnion portion is loosely engaged with the hole provided in the bracket 23 fixed to the cylinder 4 with a bolt or the like, is also screwed into the nut 22 to connect the rod ends of the fluid cylinders 21 and 24. It is.

The beam 17 has a square cross section except for its boss 17a and circular opening 17b, and is provided with four holes for four bottles 25 and four stopper projections 17c. A cam 26 is fixed to the lower surface around the circular opening 17b using bolts or the like, and the cam 26 can also be rotated and fixed as necessary. The two levers 27 are
A hole is provided in which the l end is fitted loosely with the pin 25, and its upper and lower surfaces are fitted loosely with the beam 17. An eye plate 29 is fixed using a bolt 28 to a female thread provided at the upper end of two integrated bosses 27a on the upper surface of the other end.

The trunnion portion of the hydraulic cylinder 30 is fitted into holes provided in the lever 27 and the eye plate 29.

One side of the lever 27 is provided with a rond 27b having a shoe 27c at its lower end. The two levers 31, in contrast to the lever 27, are provided with a one-piece pin 31a on the upper surface thereof, which fits into the rod end clevis 30a of the fluid cylinder 30. The levers 27 and 31 are provided with stopper protrusions 27d and 31d, respectively, in one piece on their upper surfaces, and the lever 31 is provided with a rod 31b provided with a shoe 31c at the lower end, similar to the lever 27, on its lower surface. be.

Next, the operation of this device will be explained.

In FIG. 1, the unloader completes the transfer of the cured tire to the PCI (not shown), and the tire is placed at a position ( (standby position).

In this case, the fluid pressure cylinder 21 contracts, and the fluid pressure cylinder 2
4 is for elongation.

The fluid pressure cylinder 16 (entered in the third time) is controlled and held at a predetermined height. Similarly, the fluid pressure cylinder 30 is extended so that the stopper 17c of the beam 17 and the stoppers 27d and 31d of the lever 27.31 are brought into contact with each other, and the rods 27b provided two each on the lower side of the lever 27.31 are in contact with each other. and 31b are defined. When vulcanization is completed, the upper mold (not shown) is raised, and then the tire lifter 5 is raised to peel off the vulcanized tire 6 from the lower mold 3, and then raised to a predetermined height. Thereafter, when the fluid pressure cylinder 21 is extended, the unloader moves to the center of the mold. Thereafter, when the hydraulic cylinder 30 is retracted, the lever rods 27b and 31b contact the cam 26 and grip the vulcanized tire 6, as shown in FIGS. 2 and 3.

Thereafter, the bladder 9 is extended, the fluid pressure cylinder 16 is extended by a predetermined amount, and then the fluid pressure cylinders 21 and 24 are contracted to transfer the vulcanized tire 6 to the PCI. Once the delivery is completed, the fluid pressure cylinder 24
is extended and returns to the standby position, completing one cycle of operation.

[Effects of the Invention] The unloader for a tire vulcanizer according to the present invention has a beam that can be horizontally turned between the center of the tire vulcanizer and a predetermined position and can be raised and lowered, and a beam that can be moved up and down so that the bladder of the tire vulcanizer passes through it. a circular opening formed in the beam; four levers pivotally attached to the beam at four locations on the front, rear, left and right sides of the circular opening; a rod protruding from the bottom of each lever; The tire vulcanizer is equipped with a shoe for lifting the tire provided at the lower end, a fluid pressure cylinder for rotating the lever, and a stopper for defining the expanded position and the retracted position of the lever. The circular opening of the beam is positioned above the cured tire, the shoe is positioned below the cured tire lifted by a tire lifter of a tire vulcanizer, and the lever is rotated to its retracted position. By holding the lower side of the vulcanized tire with the shoe, and then raising the beam and turning it to a predetermined position to release the vulcanized tire, the following effects are achieved.

(1) Since the lever and its rod can pass through a narrow space by lowering the beam and grip the vulcanized tire without the need for subsequent lowering operations, a reduction in cycle time can be expected.

(2) The lever positioning stopper allows the PCI
The centering accuracy at the top can be maintained sufficiently.

(3) Conventionally, separate mechanisms were used to take out, transport, and center the vulcanized tire, but now it is possible to do it with a single mechanism, resulting in cost reduction.

[Brief explanation of drawings]

FIG. 1 is a plan view of an unloader according to an embodiment of the present invention at a standby position, FIG. 2 is a plan view of the same as the above at a vulcanized tire take-out position, and FIG. 3 is an elevation view taken from line E in FIG. It is a diagram. 6... Vulcanized tire, 9... Bladder 17
...Beam of unloader, 27.31 ...Lever 27b, 31b...Rod 27c, 31c...Shoe 30 at the lower end of the rod...
Fluid pressure cylinder.

Claims (1)

[Claims] A beam that can be horizontally rotated between the center of the tire vulcanizer and a predetermined position and that can be raised and lowered, a circular opening formed in the beam so that the bladder of the tire vulcanizer passes through it, and the front, rear, left, and right sides of the circular opening four levers pivotally attached to the beam at four locations; a rod protruding from the bottom of each lever; a shoe for lifting the tire provided at the bottom end of each rod; the circular opening of the beam is positioned above the vulcanized tire in a tire vulcanizer from which the upper mold has been removed; The shoe is positioned under the vulcanized tire lifted by the tire lifter of the vulcanizer, the lever is rotated to its retracted position to hold the underside of the vulcanized tire by the shoe, and then An unloader for a tire vulcanizer, characterized in that the beam is raised and swiveled to a predetermined position to release a vulcanized tire.