JPS61134236A - Second stage molding machine of radial tire - Google Patents

Abstract

PURPOSE:To constitute the titled machine so that a large scale device such as a tailstock is not necessitated, by a method wherein a locking mechanism is constituted of a locking ball connecting an outside rim flange with a main spindle and a locking sleeve holding the ball at a fitting position. CONSTITUTION:Reaction force of a bead part is inverted to an outward direction of a tire from an inward direction of the same during a process wherein bead parts 52, 53 are kept approaching. In this instance, as a ball 25 fitted in an annular groove of a main spindle 1 is pressed by a locking sleeve 23, a rim flange 21 does not move. At the time of unloading of the tire, a rim flange 6 on a headstock side is moved backward by a cylinder. A shaft 32 and boss 29 are inserted into a flange 24, an outer sleeve 31 is moved backward, the tip of a claw 30 is fitted over a collar of the lock sleeve 23 and the shaft 23 and boss 29 are retreated. Locking of the outside rim flange 21 and the sleeve 22 based on the ball 25 is released, then the shaft 32 is moved backward and the completed tire is unloaded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to an improvement in a second-stage radial tire molding machine that molds a radial tire using seven shaving lunges.

(Prior art) Conventionally, in a radial tire molding machine that molds radial tires in two stages, the belt and tread assembly is molded on one pelt drum in the second stage of molding, and then the belt and tread assembly is molded. The green carcass placed on the shaving 7 lunge is transferred to the outer circumference position, and the shaving 7 lunge is brought closer while supplying shaping air to inflate the green carcass into a cylindrical and toroidal shape. , adapted to join the tread assembly and the green carcass.

(Problems to be Solved by the Invention) In the second-stage radial tire molding machine, depending on the specifications of the tire to be molded, a force in the direction of opening may be applied to the tire bead portion during shaving.

In such cases, the rim of the shaving ram of the conventional second-stage radial tire forming machine is supported by the tail stock, etc., so the tail stock, etc. can withstand the shaving reaction force and keep the displacement of the rim small. It was necessary to configure it in such a way that it could be used as a trap, and the tailstock and other parts of the device became a trap.

(Means for Solving the Problems) The present invention addresses the above-mentioned problems by providing a locking mechanism on the outside rim flange on the side opposite to the headstock so that the outside rim flange can be freely attached and detached from the main shaft. In the attached second stage radial tire forming machine, the locking ball and the main shaft are fitted into the locking mechanism to engage an annular groove provided on the outer peripheral surface of the main shaft to lock the outer rim 7 run :) to the main shaft. A second-stage radial tire forming machine characterized by comprising a locking sleeve that moves in the axial direction on the top to protect the ball at the fitting position, and its purpose is to:
No need for a dog-related device such as a tail stock, and the second
The structure of the step forming machine can be simplified.

Production cost) f can be reduced. The outer rim flange can be securely locked to the main shaft. Do not let the ball release the lock. There is no need to provide any passage other than the shaping air passage on the main shaft. Another object of the present invention is to provide an improved second-stage radial tire molding machine that does not cause the bead portion to separate even if the carcass molded by the first-stage molding machine is shaved into a semicircular arc or more.

(Example) The second stage radial tire molding machine of the present invention will be explained based on an example shown in Fig. 1.2.The side opposite to the headstock is composed of the following parts. First, let me explain about the outer flange.

The actuator flange part consists of an outer rim flange ridge that seals the bead part (inside of the 5 force) of the tire (c) fixed to the main shaft (1), and an outer rim flange (21) that seals the outer rim flange part (21) of the tire (c) fixed to the main shaft (1).
1) and the bead part of tire 09 (outside of 52 @ (48) t-rim flange to be sealed:)
c2υ, bolt (sleeve fixed to sill flange υ by 40, locking sleeve (c) fitted onto the same sleeve c!2, locking hole (c), and locking sleeve 123). It is composed of a spring that presses against the side, and seven flange (two flange) that are fixed to the sleeve (24) by bolts (27) and receive the reaction force of the spring (c).

In addition, near the outer flange part, there is a cam roller (2) that engages with the cam groove provided in the pawl (2), and a boss unit integrated with the shaft of the cam roller (B), which is supported so as to be swingable. The shaft 04, which constitutes the pawl driving cylinder with the pin (ω), the actuator sleeve Gυ of the pawl driving cylinder having three pin C supports, and the outer sleeve Gυ, and the boss (c)
and a bolt (7) for fixing the to the shaft 02).

Seal 01Jng 07)■C3! II, the piping of the claw drive cylinder (40 (4υ), and the arm C33 that supports the shaft country. Note that (to) is the O-ring for sealing the rim flange ■Qυ.

Next, the headstock side will be explained. On the headstock side, there is a main shaft (1), an outer shaft (2) that slides upward,
7 langes (8) fixed to the υ outer shaft (2) by bolt α force
), a rim flange (7) that is fixed to the 7 lange (8) with bolts α and seals the inner side ◎υ of the bead part 531 of the tire (49), and a pole earring (13α) (
13b) (The inner cylinder 17-no (3), which rotates separately from the outer shaft (2) due to
4J, a bearing fixed retaining ring (one), a cylinder outer sleeve a0, a bearing (IGI) fixed by a retaining ring Ci5 on the sleeve (10), and the same bearing α
Ring (5) supported by QVC and the same ring (
5) The rim flange (6) that seals the bead part 531 of the tire (451) that is fixed by the K-bolt (451), the rim flange (7) for sealing the rim flange (6), and the cylinder for the cylinder. 0 ring (9) αI (
lυ and piping (43) to the cylinder. Note that the Heller stock is a device that supports the main shaft (1) so that it can rotate fully and also includes a drive device for the main shaft (1).

(Function) Next, the function of the second stage radial tire forming machine will be explained. A tire (1st carcass) (45) molded by the first stage molding machine is inserted onto this device by a known method, and the bead portion 52 of the tire is attached to the rim flange (to) Q 6) (7).
Seal from inside and outside. Then this 1st
While introducing compressed air into the carcass (a),
They will be brought closer to each other by 1151m. 1st carcass (
Install the tread breaker layer (44) so that the center of the tread breaker layer (44) matches the center line of the tread, and then inflate the 1st carcass (44), and then glue the tread breaker layer (44Jtl-1st carcass (49) This constitutes a green tire.Bead portion 152f
In the process of approaching 53t, the reaction force of the bead portion reverses from being directed inward to the outside of the tire.

At this time, the rim flange CD on the side opposite to the headstock receives this force, but the lock sleeve (c) completely suppresses the force (see Figure 1), which is fitted into the annular groove of the main shaft (1). The rim flange (2υ) does not move. On the other hand, the rim flange (6) on the headstock side also receives this force, but does not move due to the pressing force of the cylinder. Also, when taking out the completed tire, the rim flange (6) on the headstock side (6) is retracted by the cylinder. Also, the shaft c33 and boss ζ mallet on the side opposite to the headstock are inserted into the 7 langes of the locking device, the outer sleeve 0υ is retracted, and the pawl (to) is centered on pin G9. The tip of the claw (7) engages with the collar of the lock sleeve (C) by swinging inward in the radial direction, and the boss holder of C1 (7) and boss (7) move back. At this time, the lock sleeve (c) also retreats in the same way against the spring Qe, and the annular groove provided on the inner peripheral surface of the lock sleeve (c) faces the ball (c), causing the ball (c) to move outward. The rim 72 (20) and sleeve (2) are unlocked, and the shaft 02 is then retracted, resulting in the state shown in Figure 2, and the completed tire is taken out.

(Effects of the Invention) As described above, the present invention provides the outer rim 7 on the side opposite to the headstock.
Run:) In a second-stage radial tire forming machine in which a K-lock mechanism is provided and the outer rim flange is detachably attached to the main shaft, the locking mechanism is fitted into an annular groove provided on the outer peripheral surface of the main shaft. The green tire is constructed of a locking ball that locks the outer rim flange to the main shaft, and a locking sleeve that moves axially on the main shaft to hold the ball in the fitted position. Since the completed tire is taken out as described above, a complicated device such as a tail stock is not required, the structure of the second stage molding machine can be simplified, and manufacturing costs can be reduced. There is also a locking ball that fits into an annular groove provided on the outer peripheral surface of the main shaft to lock the outer rim flange to the main shaft, and a locking sleeve that moves axially on the main shaft to hold the ball in the above-mentioned mating position. The outer rim flange can be securely locked to the main shaft. In addition, as mentioned above, it is equipped with a lock sleeve, which prevents the lock from being released even if the ball is completely locked.
Since it is carried out using the shaft of 1, etc., there is no need to provide a passage other than the air passage on the main shaft. Can be simplified. In addition, since both bead portions of the tire are sealed from the inside and outside εil by the rim 7 groove, there is an effect that the bead ″″ portion does not come off even if the carcass formed by the first stage molding machine is shaved into a semicircular arc or more.

Although the present invention has been described above with reference to embodiments, it goes without saying that the present invention is not limited to such embodiments, and that modifications can be made to the arrangement of rice plants within a range that does not depart from the spirit of the present invention. .

[Brief explanation of drawings]

Fig. 1 is a vertical cross-sectional side view showing a state of a tire mounted on a tire of a second-stage radial tire molding machine according to the present invention, and Fig. 2 is a longitudinal cross-sectional side view showing a state of the molding machine when the tire is taken out. It is a front view. (1)...Main shaft, Qυ...Outer rim flange, (c)...Socket for lock! J-:' [... Ball for locking. Sub-agents: Patent attorney Shigemon Okamoto and 3 others

Claims (1)

[Claims] In a second stage radial tire forming machine in which a locking mechanism is provided on the outer rim flange on the side opposite to the headstock and the outer rim flange is detachably attached to the main shaft, the locking mechanism is provided in an annular shape on the outer peripheral surface of the main shaft. A locking ball that fits into a groove to lock the outer rim flange to the main shaft, and a locking sleeve that moves axially on the main shaft to hold the ball at the fitted position. A second stage radial tire forming machine.