JP4039768B2 - Bead lock mechanism of bladderless tire vulcanizer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bead lock device for a bladderless tire vulcanizer . More specifically, the center mechanism of the vulcanizer can be simplified, and the centering accuracy of a green tire (unvulcanized tire) is improved to improve the tire quality. The present invention relates to a bead lock device for a bladderless tire vulcanizer that can be enhanced.
[0002]
[Prior art]
Conventionally, the center mechanism of a tire vulcanizer is complex in both the center mechanism with a bladder and the center mechanism without a bladder, and takes a large space. In particular, the center mechanism of the bladderless tire vulcanizer has a complicated equipment and a large facility for the movement of the pressing member of the bead part for ensuring the shape of the bead part.
[0003]
[Problems to be solved by the invention]
For this reason, it takes a lot of time and effort to move, and it is likely to cause a failure, and it is difficult to improve the centering accuracy of the green tire (unvulcanized tire), and therefore the quality of the tire can be improved. There was a problem that was difficult.
[0004]
An object of the present invention is to simplify a center mechanism of a vulcanizer and facilitate movement thereof, and to improve the tire quality by improving the centering accuracy of a green tire and improving the bead lock device of a bladderless tire vulcanizer. Is to provide.
[0005]
[Means for Solving the Problems]
In order to achieve the above object , the bead lock device of the bladderless tire vulcanizer of the present invention includes a fixed bead lock device for fixing one of the tire bead portions in the inner diameter portion of the unvulcanized tire, and a fixed bead lock device. A pair of movable bead lock devices that are detachably attached to a standing guide rod and that fix the other of the tire bead portions. The pair of fixed bead lock devices and the movable bead lock device include a flange portion. A bead clamp mechanism comprising a plurality of bead press members protruding and retracting in a radial direction via a bead press protruding and retracting mechanism and a bead ring member is provided on an outer peripheral portion of the cylindrical bead press supporting member provided. To do .
[0006]
In addition, the bead lock device of the bladderless tire vulcanizer according to the present invention preferably has, as a specific configuration, more preferably, the bead presser retracting mechanism is configured such that the bead ring member has a force applied from the outside of the bead ring member. A cylindrical body that is rotatable along an inner peripheral portion, and a link member that is coupled to the cylindrical body so that the plurality of bead pressing members are projected and retracted in a radial direction according to the rotation of the cylindrical body. a bead lock apparatus bladder-less tire vulcanizer which is, or furthermore, in their bead lock apparatus bladder-less tire vulcanizer of the present invention, preferably, the fixing bead lock device and the movable bead lock device A bead interval limiting stopper member is provided on the guide rod connecting the two.
[0007]
The present invention is configured as described above, and when vulcanizing a bladderless tire, before inserting a green tire (unvulcanized tire) into a vulcanizer, the bead portion of the tire is hermetically sealed by a bead lock device. Hold the tire with this beadlock device and insert it into the vulcanizer, and after vulcanization, take out the vulcanized tire while holding it with the beadlock device, so use the bladder As a result, the central mechanism of the vulcanizer can be simplified and the device itself can be made compact so that it can be moved easily and the centering accuracy of the green tires is improved. Thus, the tire quality can be improved.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0009]
FIG. 1 is a cross-sectional view showing an embodiment of a tire bead lock device of a bladderless tire vulcanizer according to the present invention . In an inner diameter portion Ws of an unvulcanized tire W, a tire bead portion Wb is shown. A fixed bead lock device 1 that fixes one of the two and a pair of movable members that are detachably attached to a guide rod 2 such as a threaded bolt that is erected on the fixed bead lock device 1 and that fixes the other of the tire bead portions Wb The bead lock device 3 is assembled.
[0010]
As shown in FIGS. 1 and 2, the pair of fixed bead lock device 1 and movable bead lock device 3 are arranged on the outer periphery of a cylindrical bead press support member 5 having a flange portion 4 as shown in FIGS. 1 and 2. A bead clamp mechanism 9 including a plurality of bead pressing members 8 that appear and disappear in the radial direction via 6 and a bead ring member 7 is provided.
[0011]
The bead presser retracting mechanism 6 includes a cylindrical body 10 that can be rotated along the inner peripheral portion of the bead ring member 7 by applying a force to rotate from the outside of the bead ring member 7, and the plurality of beads described above. It is comprised with the link member 11 connected with the cylindrical body 10 so that the pressing member 8 may be made to appear and disappear in a radial direction according to rotation of the cylindrical body 10. FIG.
[0012]
As a means for applying a force for rotating the cylindrical body 10 from the outside of the bead ring member 7 described above, a locking claw 12 formed integrally with the cylindrical body 10 as shown in FIG. The cylindrical body 10 is rotated in a predetermined direction by rotating the jig 13 for rotation by engaging the engaging recess 14 of the jig 13 for rotation. with it the by bead presser member 8 is made infested radial direction as shown in FIG. 2 by a link member 11, hermetically the front and back surfaces of the tire bead portion Wb with the bead ring member 7 and the bead pressing member 8 It is to clamp. The turning operation jig 13 is operated by an operator.
[0013]
Further, the guide rod 2 that is connected through the bead holding support member 5 and the bead ring member 7 of the fixed bead lock device 1 and the movable bead lock device 3 is connected to a bead interval of a coil spring 15a or the like via a spring seat 16. A limiting stopper member 15 is provided so that a fixed bead interval is obtained when the fixed bead lock device 1 and the movable bead lock device 3 are assembled.
[0014]
Next, a method for vulcanizing a bladderless tire will be described with reference to FIGS.
First, before inserting the molded unvulcanized tire W into the vulcanizer, as shown in FIG. 4A, one bead portion Wb of the unvulcanized tire W is connected to the bead holding member 8 and the bead ring. The fixed bead lock device 1 including the member 7 is hermetically clamped.
[0015]
Next, one bead portion Wb of the unvulcanized tire W is placed on a guide rod 2 such as a screw bolt installed upright on the fixed bead lock device 1, a bead holding support member 5 of the movable bead lock device 3, and a bead ring member 7. through the assembly, as shown in FIG. 4 (b), while adjusting the bead spacing bead spacing limit stop member 15, the cylindrical body 10 in accordance with rotation of the rotating operation jig 13 is in a predetermined direction It is rotated .
[0016]
With this rotation , the bead pressing member 8 protrudes and disappears in the radial direction as shown in FIG. 2 through the link member 11, so that the front and back surfaces of the tire bead portion Wb are beaded as shown in FIG. The ring member 7 and the bead holding member 8 are hermetically clamped.
[0017]
The fixed bead lock device 1 and the movable bead lock device 3 convey the unvulcanized tire W to the vulcanizer (not shown) while holding the bead portion Wb of the unvulcanized tire W, and the vulcanizer is left as it is. An unvulcanized tire W is inserted into the tire.
[0018]
Then, while the mold (not shown) is closed, the internal pressure is supplied and the vulcanization pressure is increased and the vulcanization molding is performed. Then, the vulcanized tire is removed from the mold while being held by the bead lock devices 1 and 3. Then, it is taken out from the vulcanizer and the vulcanization of the bladderless tire is completed.
[0019]
【The invention's effect】
In the present invention, when a bladderless tire is vulcanized as described above, the bead portion of the tire is hermetically held by the bead lock device before the green tire is inserted into the vulcanizer. Since the vulcanized tire is taken out while being held by the bead lock device after the vulcanization is completed, the following excellent effects are exhibited.
(1). Vulcanization can be performed without using a bladder. As a result, the central mechanism of the vulcanizer can be simplified, and the apparatus itself can be made compact.
(2). In addition to being able to move easily, the centering accuracy of the green tire is improved and the tire quality can be improved.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a tire bead lock device for carrying out a vulcanization method for a bladderless tire according to the present invention.
FIG. 2 is an explanatory diagram of a bead presser retracting mechanism.
FIG. 3 is a perspective view of a cylindrical body and a rotation operation jig.
FIGS. 4A to 4C are explanatory views showing steps of a vulcanization method for a bladderless tire. FIGS.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Fixed bead lock device 2 Guide rod 3 Movable bead lock device 5 Bead presser support member 6 Bead presser retracting mechanism 7 Bead ring member 8 Bead presser member 9 Bead clamp mechanism 10 Cylindrical body 11 Link member 12 Locking claw 13 Rotating operation Jig 14 engaging recess 15 bead interval limiting stopper member 16 spring seat W unvulcanized tire Ws inner diameter Wb tire bead

Claims (3)

  A fixed bead lock device for fixing one of the tire bead portions and a guide rod standing on the fixed bead lock device are detachably attached to the inside diameter portion of the unvulcanized tire, and the other of the tire bead portions is fixed. The pair of fixed bead lock devices and the movable bead lock device radiate to the outer periphery of a cylindrical bead presser support member having a flange portion via a bead presser retracting mechanism. A bead lock device for a bladderless tire vulcanizer provided with a bead clamp mechanism composed of a plurality of bead holding members that appear and disappear in a direction and a bead ring member. A cylindrical body that can be rotated along an inner periphery of the bead ring member by a force applied from the outside of the bead ring member, and the plurality of bead press members; 2. A bead lock device for a bladderless tire vulcanizer according to claim 1, wherein the bead lock device comprises a link member connected to the cylindrical body so as to project and retract in the radial direction according to the rotation of the cylinder .   The bead lock device of a bladderless tire vulcanizer according to claim 1 or 2, wherein a bead interval limiting stopper member is provided on a guide rod that connects the fixed bead lock device and the movable bead lock device.

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