JPH0423611Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention improves the attachment/detachment structure of the bladder to the center mechanism in a tire vulcanizer in which the bladder in the center mechanism is a post-inwell type, especially that of the lower end of the bladder. , relates to a device that enables quick and easy attachment and detachment of a bladder.

(Prior art) As is well known, the central mechanism located at the center of the lower mold of a tire vulcanizer and installed on the base frame side is attached to the inner surface of the green tire, and is used for shaping the inner surface of the tire and maintaining internal pressure. It is equipped with a bladder made of an elastic material such as rubber that can be expanded and deformed to form the inner surface of the tire, and its operation mechanism, as well as a supply and discharge pipe for the thermopressure medium for internal pressure. In order to perform the required movement by gripping both the upper and lower ends, as is known, the upper end of the bladder is gripped at the upper end of the center post in the central mechanism by an upper clamp ring and an upper bead ring, and the lower end of the bladder is clamped by a lower clamp ring hub and a lower bead ring incorporated in a lower clamp ring hub assembly externally fitted on the center post;
The required expansion/contraction deformation is achieved through movements such as the raising and lowering of the center post and the individual raising and lowering of the clamp ring hub body. However, this is the center mechanism of a standing post type, and as is known, in a standing post type, the upper side of the center post is always in a position protruding above the center mechanism, and the bladder is suspended in a right cylindrical shape. It is exposed above the lower mold. On the other hand, in a post-in-well type center mechanism, the center post intrudes into the well, which is the outer cylindrical body of the center mechanism, and the bladder is stored in the well in a folded manner. In this type, the upper end of the bladder is attached to the center post in the same way as the standing post type, but when the lower end of the bladder is attached to the lower clamp ring hub assembly, the lower bead ring is separated and attached to the outer periphery of the upper end of the well. However, the lower clamp ring can be divided into two parts and attached to the lower clamp ring hub assembly so that the lower end of the bladder is held between the clamp rings. Now, when attaching and detaching such a bladder from the center mechanism, a bladder assembly is constructed in which the upper end of the bladder is held between an upper clamp ring and an upper bead ring, and the lower end of the bladder is held between a lower clamp ring and a lower bead ring. , the upper clamp ring and upper bead ring side are attached to the upper end of the raised center post, the bladder assembly is suspended, and the lower clamp ring side, which is holding the lower end of the bladder, is attached to the lower clamp ring hub assembly. By rotating the bladder and screwing the screw hole formed on the inner surface of the clamp ring into the threaded part formed on the hub in the tightening direction or in the loosening direction,
We are doing the work of attaching and detaching it.

(Problems to be solved by the invention) According to the conventional attachment/detachment means described above, the bladder assembly is rotated forward and backward in a suspended state, and the lower clamp ring is attached/detached to/from the lower clamp ring hub assembly. Of course, this requires manual work from start to finish, and the bladder assembly has considerable weight, and a seal between the bladder assembly and the central mechanism is also required, which is cumbersome and time-consuming.
A major problem is that it takes time to attach and detach.

(Means for Solving the Problems) The present invention improves the attachment/detachment means, especially the central mechanism of the post-in-well type in which the bladder is housed in the well, and makes it extremely quick, easy, and automated. Specifically, the upper end of the bladder is supported by a center post that can be raised and lowered in the central mechanism of a tire vulcanizer, and the lower end of the bladder is fitted onto the center post so that it can be raised and lowered. A lower bead ring is fixed to the outside of the upper end of the well, and a slide ring is fitted inside the upper end of the well so as to be movable up and down, in an assembly in which the bladder is housed in a well of the central mechanism;
The lower end of the bladder is held between the slide ring, a lower clamp ring provided on the assembly, and a spacer interposed between both rings, and a gear ring rotatably held on the assembly is screwed onto the slide ring. and inserting and supporting a rotation prevention guide pin provided in the assembly into the slide ring;
A pinion of a rotating shaft rotatably suspended from the assembly is engaged with the gear ring, and the rotating shaft is connected to a rotational drive source provided on the vulcanizer side.

(Function) According to the technical means of the present invention, the entire central mechanism is shown in FIGS. 1 and 2, although it is not shown in the drawings,
At the center position of the lower mold in the vulcanizer base frame 1 where the lower mold is installed together with the lower platen, the lower dome, etc., a knock-out lever 4 is inserted into the well 7 of the central mechanism 3 via the guide sleeve 2.
An upper bead ring 5 and an upper clamp ring 6 are attached to an upper bead ring 5 and an upper clamp ring 6, which are detachably attached to the upper end of a center post 10 which is located at the center of the well 7 and is movable up and down via an elevating cylinder 55, etc. Therefore, the upper end of the bladder 8 is clamped, and the lower end of the bladder 8 is attached to the lower clamp ring hub main body 9 of the lower clamp ring hub assembly 33 which is externally fitted to the center post 10 via the lifting cylinder 56 so as to be able to rise and fall. By attaching the lower bead ring 11 to the outer periphery of the upper end of the well 7 and clamping it to the attached lower clamp ring 34 side, as shown in FIGS. 1 and 2, the center post 10, In the post-in-well type central mechanism 3 that allows the lower clamp ring hub assembly 33 to be lowered and the bladder 8 to be stored in the well 7, the present invention is configured to lower the lower clamp ring hub assembly 33 and store the bladder 8 in the well 7. A slide ring 109 is fitted inside the upper end so as to be movable up and down along the inner surface of the well, and a bottom plate 111 protruding inward is integrally provided at the lower end of the slide ring 109.
A threaded portion 111a is formed on the inner surface of the bottom plate 111,
A lower clamp ring 34 fixed to the upper end of the hub main body 9, the slide ring 109, and a spacer 112 interposed between the lower parts of both rings 34, 109.
The lower end of the bladder 8 is held by the hub main body 9.
A threaded portion 110a formed on the outer peripheral surface of a gear ring 110 rotatably provided on the slide ring 10
9 side threaded portion 111a, and gear ring 1.
An internal gear 110b formed on the inner peripheral surface of the slide ring 109 is engaged with a pinion 116 rotatably provided on the hub main body 9, and a rotation prevention guide pin 118 provided on the hub main body 9 is connected to the bottom plate 11 of the slide ring 109.
1 through the upper lower clamp ring 34 side, and the pinion shaft 11 of the pinion 116
5 is connected via a joint 117 to a rotation shaft 122 rotatably suspended on the hub main body 9 side, and this rotation shaft 1
22 is provided with a rotating shaft 122a that holds the rotating shaft 122 so as to slide and rotate together, and a sprocket 12 is provided on the rotating shaft 122a, as shown in FIGS. 4, 5, and 6. By extending an endless chain 15 so that it can circulate through an intermediate sprocket 14 between a sprocket 13 provided on a drive shaft 5 provided on the side of the booth frame 1 on the vulcanizer side and the sprocket 12. The bladder 8 is attached and detached as follows.

That is, in the state and positional relationship shown in FIG. 1, the piston rod 56a of the lifting cylinder 56
and lower clamp ring hub assembly 33.
The entire body is raised so that the clamping lower end of the bladder 8 is located above the lower bead ring 11, and then the head 5 of the drive shaft 5 shown in FIGS.
When a is rotated with a tool such as a wrench or spanner,
Sprocket 13, chain 15, sprocket 1
2 through the rotation core shaft 122a, therefore the rotation shaft 12
2 is rotated, the pinion 116 is rotated, the gear ring 110 is rotated via the internal gear 110b,
Since the slide ring 109 is lowered independently together with the bottom plate 111 by the threaded portions 110a and 111a and the rotation prevention guide pin 118, if the upper end of the slide ring 109 moves below the clamping lower end of the bladder 8, the lower end of the bladder 8 Freely released, the bladder 8 can be removed by hand very easily. In this case, the spacer 112 is
As shown in , the locking step 16 formed on the circumferential side of the lower crumbling ring 34 fixed to the hub body 9 and the spacer 112 lowers it slightly and stops on the ring 34 side, and the lower end of the bladder 8 A gap is created in between to facilitate bladder removal. Therefore, when installing the spacer 112, the lower end of the bladder is aligned with the outer periphery of the lower clamp ring 34, and the drive shaft 5 is rotated in the opposite direction to raise the slide ring 109, contrary to what was described above.
The lower end of the bladder is attached to the ring 34,1 through the accompanying rise of
It can be held between 09 and 09. When installing this spacer 1
12 presses the lower end of the bladder 8 at the slide ring rising point to maintain internal pressure, and automation is possible by driving the drive shaft 5 with a motor or the like.

(Embodiment) A suitable embodiment of the device of the present invention will be described with reference to FIGS. 1 to 6. The central mechanism 3 in the embodiment is a post-in-well type having a well 7, in which the bladder 8 can be stored in a folded manner, and a center post 10 and a lower clamp ring hub assembly 33 are equipped so as to be able to move up and down. Therefore, the mechanisms and members other than the above-mentioned members are not limited and can be applied to each type. Further, the means for raising and lowering the center post 10 and the lower clamp ring hub assembly 33 is not necessarily the lifting cylinder 55 shown in the drawings,
56 can be used. In the illustrated central mechanism 3, FIG. 1 shows a state in which the internal pressure is maintained in the bladder 8. Therefore, the lock lever 2 is inserted into the locking recess 21 to prevent the assembly 33 from lowering.
0 is locked. Therefore, when the assembly 33 is lowered to store the bladder 8 as shown in the second figure, the lock lever 20 is opened as shown in the second figure. It goes without saying that all other necessary structures for the center mechanism are provided in the same manner as in the conventional center mechanism. 22 in Figure 2
Reference numeral 23 indicates a supply/discharge pipe for a thermopressure medium (internal pressure) such as steam, and a supply/discharge hole provided in the lower clamp ring hub main body 9.

The slide ring 109 in the device is a short cylindrical ring body, and a ring plate-shaped bottom plate 111 is integrally attached to the lower end of the slide ring 109 with a locking screw 86, and a seal 108 is provided at the joint between the two. It is also possible to form it as one piece. The lower clamp ring 34 is fixed to the upper circumferential side of the hub main body 9 by bolts 127. A spacer 112 is provided on the lower peripheral side of the lower clamp ring 34.
to slidably and irremovably engage the second
As is clear from the figure, locking step portions 16 that engage with each other are formed on the joining sides of the two in opposite directions. A threaded portion 111a is formed on the inner circumferential surface of the bottom plate 111, and the outer circumferential surface of a gear ring 110 is rotatably fitted into a stepped portion 25 formed on the lower circumferential side of the hub main body 9 as shown in FIG. A threaded portion 110a formed in the above is screwed into the threaded portion 111a, and a rotation prevention guide pin 118 provided for raising and lowering the slide ring 109 has its lower end inserted and supported on the bottom side of the hub main body 9, and the bottom plate 111 is screwed into the threaded portion 111a. It is inserted through and its upper end is inserted and supported by the lower clamp ring 34 side, and guides the bottom plate 111 to move straight up and down. Internal tooth gear 110 formed on the inner peripheral surface of ring gear 110
The pinion 116 that meshes with b has its pinion shaft 115 rotatably held in a receiver 114 provided in the hub main body 9 via a sleeve 113, and its shaft end is connected to the shaft end of the rotation shaft 122 and the joint 117. connected. This rotating shaft 122 has a double shaft structure with the rotating core shaft 122a because the clamp ring hub assembly 3
This is because a single shaft is inconvenient because the shaft 3 moves up and down. For this purpose, the core shaft 122a whose lower end is rotatably supported by a bearing box 26 as shown in FIG. It is fitted. The drive shaft 5 is rotatably supported by a bearing 28 on a mounting bracket 27 provided on the outer surface of the base frame 1 of the vulcanizer, as shown in the fourth figure. Of course, it is also possible to design freely with the same effect other than the illustrated example. The structure in which the upper end of the bladder 8 is detachably attached to the upper end of the center post 10 using the upper bead ring 5 and the upper clamp ring 6 is as shown in FIG.
As an example, a screw cap 100 is attached to the center post 10 via a lock nut 101, a lower bead ring 5 is removably engaged with the cap 100, and an upper clamp ring 6 is screwed into the cap 100.

(Effects of the invention) According to the invention, it is particularly advantageous that the bladder 8 in the post-inwell type vulcanizer center mechanism 3 can be attached and detached very quickly and easily, and the lower end of the bladder can be attached and detached in an untouched manner. 109, the lower clamp ring 34, and the spacer 112, and attachment/detachment is performed by raising and lowering the slide ring. This creates a gap when detaching by raising and lowering the spacer 112, and maintains internal pressure during installation. It is extremely superior to conventional manual means in that it completely saves and shortens the labor and time required in the past, is easy to automate, and can be installed and removed safely and easily.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view of an example of the central mechanism using the embodiment of the present invention, Fig. 2 is a side sectional view of the main part when the bladder is stored, and Fig. 3 1 and 2 are enlarged sectional views of the main part of the device. ,
FIG. 4 is a front view of one example of the rotational drive mechanism, FIG. 5 is a plan view of the same, and FIG. 6 is a side view of the main interlocking parts. 3... Central mechanism, 7... Well, 5... Upper bead ring, 6... Upper clamp ring, 9...
Lower clamp ring hub main body, 33... Lower clamp ring hub assembly, 11... Lower bead ring, 34... Lower clamp ring, 109... Slide ring, 111... Bottom plate, 112... Spacer, 110... Gear ring , 118... Rotation prevention guide pin, 116... Pinion, 122...
Rotation axis, 5... Drive axis.

Claims (1)

[Scope of utility model registration request] The upper end of the bladder is supported by the center post that can be raised and lowered in the central mechanism of the tire vulcanizer, and
The lower end of the bladder is externally fitted onto the center post so that it can be raised and lowered, and the lower end is supported by the clamp ring hub assembly.
In the case where the bladder is housed in a well of the central mechanism, a lower bead ring is fixed to the outer side of the upper end of the well, and a slide ring is fitted inside the upper end of the well so as to be movable up and down, and the slide ring and the assembly are The lower end of the bladder is held between the provided lower clamp ring and a spacer interposed between both rings, and a gear ring rotatably held in the assembly is screwed onto the slide ring. A rotation prevention pin is inserted into and supported by the slide ring, a pinion of a rotation shaft rotatably suspended from the assembly is engaged with the gear ring, and the rotation shaft is provided on the vulcanizer side as a rotational drive source. A bladder attachment/detachment device for a tire vulcanizer, characterized in that it is connected to a bladder attachment/detachment device for a tire vulcanizer.