JP2001113609A - Green case storage method and green case storage device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a storage method and an apparatus for storing a green case that can prevent the deformation of the green case. SOLUTION: After transferring a molded green case 12 to a green case storage device 1, a plurality of divided segments 17 in which a packing sheet 7 is fitted around the outer periphery of a storage drum 4.
The diameter of the green case 12 is positioned by the stoppers 5 and 6 of the storage drum 4.
At the same time, the diameter of the divided segment 17 is increased,
The bead portions 12a and 12b of the green case 12 are pressed in the radially outward direction, and the lumen 9 is closed. Then, compressed air is introduced into the inner cavity 9 from the air port 8 of the storage drum 4, and is stored in a state where the pressure in the inner cavity 9 is higher than the pressure outside the green case 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for storing a green case, which is a green tire before vulcanization, before being carried into a vulcanization step, and a storage apparatus for the same. .

[0002]

2. Description of the Related Art A green case is temporarily stored until a green case assembled by a molding machine is carried out to the next vulcanization step. This is because the required cycle time differs between the molding step and the vulcanization step. In general, the green case is stored by being placed horizontally on a portable trolley or suspended vertically on a hook conveyor running overhead. In the case of the former horizontal storage,
As shown from the left state to the right state in FIG. 6, the upper bead portion of the green case hangs down by its own weight and is deformed.
When the latter is suspended vertically, the tread portion at the lowermost end of the green case hangs down and deforms, as shown from the left side to the right side in FIG.

The deformed green case is less likely to be loaded at a predetermined position of a vulcanizing mold in a vulcanizing process. Then, the quality of the finished tire is reduced, the yield is reduced, and the cost is increased. Therefore, it is possible to manually correct and load the green case immediately before putting the green case into the vulcanizing mold. However, since the cost is high, unmanned operation is desired at present because the cost reduction is loud.

[0004]

As described above, in order to manufacture tires more effectively from the viewpoint of the quality of finished tires and the like, the green case is deformed even during holidays or during storage. It is not preferable. Therefore, an object of the present invention is to provide a storage method capable of preventing deformation of a green case and storing the green case, and an apparatus for the storage method.

[0005]

SUMMARY OF THE INVENTION The object of the present invention is characterized in that the cavity of the green case is sealed, the pressure in the cavity is made higher than the outside of the green case, and the green case is held. This is achieved by a green case storage method. That is, the green case is stored while maintaining its shape due to the relative pressure difference between the inner cavity and the outside. Therefore, in the next vulcanization step, the vulcanization mold is surely loaded at a predetermined position, and the effects such as the improvement of the quality of the finished tire and the reduction of the cost due to the improvement of the yield are exerted.

Further, this storage method has at least an air port for supplying compressed air to the inner cavity of the green case, and presses the bead portion of the green case radially outward to seal the inner cavity. This is achieved by a green case storage device having a storage drum. By doing so, with a simple structure, the bead portion of the green case is pressed and held in the radially outward direction to block air leakage,
The pressure in the inner cavity of the green case can be reliably set higher than the external pressure, and the shape of the green case at the time of molding can be maintained as it is.

If a plurality of air ports for supplying compressed air to the inner cavity of the green case are provided, the compressed air can be uniformly and quickly supplied to the inner cavity.
Further, if the storage drum is constituted by a plurality of segments, a mechanism for easily pressing the bead portion of the green case in a radially outward direction can be ensured, and the inner cavity can be reliably sealed. In addition, by providing a stopper on the storage drum, the positioning of the green case can be reliably performed with a simple structure, and the sealing of the inner cavity can be further ensured, and furthermore, the deformation of the green case is further prevented. Can be stored.

[0008]

FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described with reference to FIG. FIG. 1 shows a part of a tire manufacturing apparatus, and shows a molding machine 10 having a known structure and a known green case unloading device 13 having a known feed mechanism 15 guided by a guide 14. Further, to the right of these figures, a green case storage device 1 according to the embodiment of the present invention is shown.

The green case storage device 1 has a well-known turret rotating device 2 and has a multi-head structure in which a plurality of storage drums 4 described later are provided. As shown in FIG. 2, a plurality of storage drums 4 (in this embodiment,
) Are formed of arc-shaped divided segments 17.
At the center of the divided segment 17, a link mechanism 16 provided with a guide for restricting radial movement is provided. The link mechanism 16, as shown in FIG.
The link mechanism 16 expands and contracts the divided segment 17 along the guide 18 when the rod moves in and out by the action of pneumatic pressure. The diameter of the segment 17 is usually reduced.

As shown in FIG. 3, a packing sheet 7 made of, for example, a rubber material is fitted around the outer periphery of the divided segment 17. A pair of stoppers 5 and 6 are provided at the axial end of the segment 17 along the shape of the segment 17, that is, in an arc shape. The one stopper 5 is a short stopper, and is provided on the entrance side of the green case 12 (to the left in FIGS. 1 and 3). The other stopper 6 is a tall stopper that protrudes in a tapered shape, and is provided on the opposite side (the right side in FIGS. 1 and 3) from the stopper 5. Further, each divided segment 17 is provided with an air port 8 connected to a compressed air supply source (not shown).

The green case storage device 1 of the present embodiment is configured as described above. Next, the operation thereof will be described. First, the outside of the green case 12 assembled on the forming drum 11 of the forming machine 10 is gripped by the three claws 13 a of the green case unloading device 13. With the diameter of the forming drum 11 reduced, the green case unloading device 13 is moved rightward in FIG. 1 by the feed mechanism 15. Then, when the entire green case 12 gets over the stopper 5 of the divided segment 17 whose diameter is reduced,
The rod in the cylinder 3 is shown in FIG.
Is moved to the left, and the diameter of the divided segment 17 is increased via the link mechanism 16. Therefore, as shown in FIG. 3, the bead portion 12a on the back side of the green case 12 is
And the bead portion 12 b in front of the green case 12 approaches the stopper 5. This allows
The movement of the green case 12 in the axial direction is restricted, and the green case 12 is stopped at a predetermined position of the green case storage device 1.

Further, since the diameter of the divided segment 17 is increased, the packing sheet 7 of the divided segment 17 presses the bead portions 12a and 12b of the green case 12 in a radially outward direction, and a gap in the axial direction of the green case 12, that is, The gap between the inner end of the green case 12 and the packing is sealed. At the same time, as shown in FIG.
Seals the gap S between the divided segments 17 as well. That is, the lumen 9 of the green case 12 is completely sealed, and air leakage is completely blocked. Then, the claw 13a of the green case unloading device 13 expands in diameter, releases the green case and returns to the original position on the forming drum 11 side.

Thereafter, compressed air is sent from a compressed air supply device (not shown) to the inner cavity 9 of the green case 12 through the air port 8. Thus, the pressure in the inner cavity 9 of the green case 12 becomes higher than the pressure outside the green case 12. In this state, the storage drum 4 is mounted on the turret rotating device 2.
And stored at the right side of the green case 12 in a state shown by a dashed line. Then, after a predetermined time has elapsed, it is transported to the vulcanization step.

In the present embodiment, the inner cavity 9 of the green case 12 is sealed by the divided segments 17 and compressed air is supplied to the inner cavity 9 to increase the pressure of the inner cavity 9 to the outside. Thus, deformation of the green case 12 due to its own weight or the like can be prevented, and the shape of the green case 12 at the time of formation can be maintained. Therefore, a better finished tire can be manufactured in terms of the quality of the finished tire and the like.

In this embodiment, since a plurality of air ports 8 are provided, the air can be uniformly and quickly supplied to the inner cavity 9 of the green case 12. Furthermore, since the storage drum 4 is composed of the plurality of divided segments 17, the bead portions 12a and 12b of the green case 12 can be pressed radially outward with a simple configuration, and the inner cavity 9 can be reliably sealed. . In the present embodiment, since the packing sheet 7 is further provided on the outer periphery of the divided segment 17, the hermetic sealing of the lumen 9 can be made more reliable. Further, since the stoppers 5 and 6 are provided in the divided segment 17, the positioning of the green case 12 can be reliably performed with a simple structure, and the hermetic seal of the lumen 9 can be reliably performed.

[0016]

As described above, according to the present invention, the following excellent effects can be obtained. According to the invention of claim 1, the cavity of the green case is sealed, and the pressure of the cavity of the green case is relatively increased with respect to the outside, thereby preventing deformation of the green case due to its own weight or the like. Can be stored. As a result, in the next vulcanization step, the vulcanization mold is surely loaded at a predetermined position, and an effect such as securing quality improvement of the finished tire is achieved.

The storage method according to the first aspect of the present invention is characterized in that, as in the sixth aspect of the present invention, after the inner cavity of the green case is sealed, compressed air is supplied to the inner cavity of the green case. It can be carried out. That is, with these structures, the effect of the storage method of claim 1 of the present invention can be obtained by easy means.

According to a second aspect of the present invention, there is provided a green drum having an air port for supplying compressed air, and a storage drum for pressing a bead portion of a green case in a radially outward direction to seal the inner cavity. Since the case storage device is used, the storage method described above can be reliably performed with a simple structure.

[Brief description of the drawings]

FIG. 1 is a front view of a green case storage device according to an embodiment.

FIG. 2 is a left side view of a main part of the green storage device according to the embodiment.

FIG. 3 is a partially enlarged sectional view of a divided segment of the green case storage device in FIG. 1;

FIG. 4 is a partial sectional view showing a conventional technique.

FIG. 5 is a partial cross-sectional view showing a conventional technique.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Green case storage device, 4 ... Storage drum, 5 ... Stopper, 6 ... Stopper, 7 ... Packing sheet, 8 ... Air port, 9 ... Inner cavity, 12 ... Green case, 17 ... Split segment.

Claims (6)

[Claims] An inner cavity of a green case, which is a green tire having a shape before being vulcanized, is sealed, and a pressure of the inner cavity is made higher than that of the outside of the green case so that the green case is held. A method for storing a green case. 2. A storage drum having at least an air port for supplying compressed air to an inner cavity of the green case and pressing a bead portion of the green case in a radially outward direction to seal the inner cavity. A green case storage device, comprising: 3. The green case storage device according to claim 2, wherein a plurality of the air ports are provided. 4. The storage drum according to claim 2, wherein the storage drum is composed of a plurality of segments.
A green case storage device according to item 1. 5. The green case storage device according to claim 2, wherein the storage drum is provided with a stopper for positioning the holding of the green case. 6. After sealing the lumen of the green case,
Supplying compressed air to the lumen of the green case,
2. The green case is stored.
Green case storage method described in.