JP5715438B2 - Raw tire shape holder and raw tire shape holding device - Google Patents

Description

  The present invention relates to a raw tire shape holder and a raw tire shape holding device used to hold the shape of a raw tire, and in particular, to easily hold the shape of a raw tire without requiring a large facility. It is about what to do.

  The raw tire before vulcanization is easily deformed, and when it is laid flat in the standby position of the raw tire, the bead portion T2 which is a free end is often deformed by its own weight as shown in FIG. With bus tires, there is a greater concern about deformation due to its own weight. Therefore, conventionally, various attempts to suppress the deformation of the raw tire until entering the vulcanization process have been made. For example, in Patent Documents 1 and 2, a bladder is inserted inside the raw tire, An apparatus for holding a green tire by expanding the bladder with compressed gas is disclosed.

JP 2005-349789 A JP-T-2004-518561

  However, the conventional apparatus described above has a problem that, in addition to the bladder, a compressor, a pressure regulating valve, an on-off valve, piping, a power source, and the like that send compressed gas to the bladder are required, and the facility becomes large. In addition, when removing the raw tire from the equipment, because the bladder is placed inside the raw tire, a lot of work is taken to remove the raw tire from the bladder, and there is much room for improvement in this respect as well. It was left.

  Therefore, an object of the present invention is to easily maintain the shape of a green tire without requiring a large facility.

The present invention has been made to solve the above problems, and a raw tire shape holder of the present invention is a raw tire shape holder that is attached to a raw tire and holds the shape of the raw tire. The tire holder is a leaf spring that is convexly curved in one direction, and is inserted into the raw tire with the convex side surface of the leaf spring oriented toward the inner surface of the raw tire. It comprises at least one leaf spring that uniformly urges the bead portion toward the outside and maintains the shape of the green tire evenly .

  In such a raw tire shape holder, the leaf spring is inserted into the raw tire in a posture in which the convex side is directed toward the inner surface of the raw tire and bent. When the bending of the leaf spring is released in this state, the leaf spring expands outward by its restoring force, and urges each bead portion of the green tire outward from the inner surface side.

  Therefore, according to the raw tire shape holder of the present invention, the bead portion of the raw tire is urged outward from the inner surface side, so that the raw tire can be prevented from being deformed by its own weight, The raw tire shape holder does not require large-scale equipment unlike the conventional bladder-type holding device, and can easily and reliably hold the shape of the raw tire.

  In addition, in the raw tire shape holder of this invention, it is preferable that it consists of two or more leaf springs, and according to this, the bead portion can be biased more evenly, so the shape of the raw tire is also It becomes possible to hold even more evenly.

The raw tire shape holding device of the present invention includes a support base, a support column erected on the support base, and extends along the axis of the support column and is curved outwardly as viewed from the support column. At least one leaf spring whose one end is located on the support base side is fixed to the support column, and a slide that is movable along the axis while receiving the urging force of the leaf spring with the other end of the leaf spring being fixed. A member and a slide member, and when the raw tire is inserted around the support column, the raw tire abuts against the bead portion of the raw tire and is pushed toward the support base, and the leaf spring is connected to the raw tire. contact corresponds to the shape of the inner surface, by lifting the bead portion from the inner surface of the raw tire, while suppressing deformation of the raw tire, so as to retain the shape of the raw tire, the slide And the abutment member to deflect said leaf spring is pushed towards the support base of the timber together, is characterized in that comprises a.

  In such a raw tire shape holding device, the raw tire is inserted around the support column in a lateral posture (a posture in which the side portion of the raw tire faces the support base), and the raw tire is brought into contact with the contact member. When the contact member moves downward toward the support base and the contact member moves toward the support base, the slide member also moves together toward the support base and slides with one end of the leaf spring fixed to the support column. The other end of the leaf spring fixed to the member comes close to the plate spring, so that the leaf spring can be bent and enter the raw tire. In this state, when the pressing of the contact member is released, the leaf spring is restored, and each bead portion of the raw tire is urged outward from the inner surface side by the leaf spring.

  On the other hand, in order to remove the raw tire from the raw tire shape holding device, simply lift the raw tire away from the support base and the leaf spring will return to its original shape by its restoring force. It can be removed from the raw tire shape holding device without interference.

  Therefore, according to this raw tire shape holding device, the bead portion of the raw tire is urged outward from the inner surface side, so that the raw tire can be prevented from being deformed by its own weight, and this Unlike conventional bladder-type devices, the raw tire shape retention device does not require a compressor, pressure regulator, on-off valve, piping, power supply, etc. that send compressed gas to the bladder, and does not require large-scale equipment. The shape of the green tire can be easily and reliably maintained. Moreover, when removing a raw tire from an apparatus, since the holding | maintenance of the raw tire by a leaf | plate spring is cancelled | released only by pulling up a raw tire, work can be simplified.

  In the raw tire shape holding device of the present invention, it is preferable to provide two or more leaf springs. According to this, the bead portion can be biased more evenly, and the shape of the raw tire is also more It becomes possible to hold more evenly.

  According to the present invention, the shape of the green tire can be easily maintained without requiring a large facility.

It is sectional drawing which shows the raw tire shape holder of one Embodiment according to this invention with a raw tire, (a) is a state before inserting a leaf | plate spring in a raw tire, (b) is a leaf | plate spring. The state where it inserted in and supported the bead part is shown, respectively. It is sectional drawing which shows the raw tire shape holding | maintenance apparatus of one Embodiment according to this invention. (A)-(c) is sectional drawing similar to FIG. 2 which respectively shows the procedure of hold | maintaining a raw tire using the raw tire shape holding | maintenance apparatus of FIG. It is sectional drawing which showed a mode that the bead part of a green tire deform | transforms when a green tire is piled up.

  Embodiments according to the present invention will be described below with reference to the drawings. In FIG. 1, the code | symbol 1 shows the raw tire shape holder of one Embodiment, and the code | symbol 10 has shown the raw tire shape holding | maintenance apparatus of one Embodiment in FIG. Moreover, in FIGS. 1-3, the code | symbol T shall show the raw tire which has a pair of bead part on the right and left of a tire width direction.

  As shown to Fig.1 (a), the raw tire shape holder 1 is mounted | worn with the raw tire T, and holds the shape of a raw tire, This raw tire shape holder 1 faces in one direction. A leaf spring 3 that is curved in a convex manner and is inserted into the raw tire T in a state where the convex side surface of the leaf spring 3 is directed to the inner surface T1 of the raw tire T, and the bead portion T2 of the raw tire T. Is formed of at least one leaf spring 3 that urges toward the outside. Two or more leaf springs 3 are preferably provided. Here, three leaf springs 3 are arranged substantially equally in the tire circumferential direction.

  In the raw tire shape holder 1, the plurality of leaf springs 3 are inserted into the raw tire T in a posture where the convex side is directed toward the inner surface T1 and bent simultaneously or sequentially. When the bending of the leaf spring 3 is released in this state, as shown in FIG. 1 (b), the leaf spring 3 expands outward by its restoring force, and each bead portion T2 of the raw tire is outward from the inner surface T1 side. Energize towards.

  Therefore, according to the raw tire shape holder 1, the bead portion T2 of the raw tire T is urged outward from the inner surface T1 side, so that the raw tire T can be prevented from being deformed by its own weight. Moreover, the raw tire shape holder 1 can easily and reliably hold the shape of the raw tire T without requiring a large-scale facility unlike a conventional bladder-type holding device.

  Further, in this embodiment, since the raw tire shape holder 1 is composed of two or more leaf springs 3, the bead portion T2 can be biased more evenly, so that the shape of the raw tire is held evenly. become able to.

  2 and 3 show a raw tire holding device 10 using a concept similar to that of a raw tire shape holder using a leaf spring, and this raw tire holding device 10 is formed on the lower surface as shown in the figure. A support base 12 having a plurality of wheels 12a, a support column 14 standing on the support base 12, and extending along the axis O of the support column 14 and curved outwardly as viewed from the support column 14, A leaf spring 16 having one end 16a located on the side 12 fixed to the column 14, and a slide member movable along the axis O while receiving the biasing force of the leaf spring 16 with the other end 16b of the leaf spring 16 fixed. 18 and the slide member 18, and when the raw tire T is inserted around the support post 14, the raw tire T abuts against the bead portion T 2 and is pushed toward the support base 12 and the slide member 18 is moved together. Support base The contact member 20 to deflect the leaf spring 16 is pushed toward the 12, it includes a.

  Here, the slide member 18 has a ring shape surrounding the support column 14, and has a convex portion (not shown) engaged with and guided by a groove 14 a formed along the axis O in the support column 14. It protrudes from the surface. Although not shown in the drawings, a protrusion is formed on the support column 14 and a groove that engages with the protrusion is formed on the slide member so that the slide member 18 slides along the axis O. May be.

  Three leaf springs 16 are provided here, and the plurality of leaf springs 16 are arranged around the support column 14 at a uniform interval. In a state in which the leaf spring 16 is assembled to the device 10, the maximum distance L1 from the axis O to the leaf spring 16 is preferably smaller than the bead portion radius R. According to this, the raw tire T is attached to the column 14. It is possible to prevent the bead portion T <b> 2 of the raw tire T from interfering with the leaf spring 16 when inserted around.

  The contact member 20 is connected to the slide member 18 via the connecting piece 22 and moves along the axis O together with the slide member 20. Further, the extending length L2 of the contact member 20 is set at least to a length at which the contact member 20 contacts the bead portion T2 of the raw tire T when the raw tire T is inserted around the support post 14. Of course, the contact member 20 may have a length that extends beyond the bead portion T2 to a position corresponding to the sidewall portion.

  In order to hold the raw tire T using the raw tire shape holding device 10 as described above, first, as shown in FIG. 3A, the raw tire T is placed in a horizontal posture (the side portion of the raw tire T is supported by a base). Is inserted around the support column 14, that is, the opening of the raw tire T is passed through the support column 14, the raw tire T is brought into contact with the contact member 20, and downward toward the support base 12. Push into. The downward pressing of the contact member 20 may be due to the weight of the raw tire T or due to the pushing force of the operator. When the contact member 20 moves downward toward the support base 12, the slide member 18 also moves together toward the support base 12, and the one end 16 a of the leaf spring 16 fixed to the column 14 and the slide member are moved together. The other end 16 b of the leaf spring 16 fixed to 18 is close to the leaf spring 16, whereby the leaf spring 16 can be bent and enter the raw tire T. In this state, when the downward pressing of the contact member 20 is released, the leaf spring 16 is restored, and each bead portion T2 of the raw tire T is attached outwardly from the inner surface T1 side by the leaf spring 16. Be forced.

  On the other hand, in order to remove the green tire T from the green tire shape holding device 10, simply lift the green tire T upward (in the direction away from the support base 12), and the leaf spring 16 returns to its original shape by its restoring force. Since the maximum distance L1 is reduced (L1 <R), the raw tire T can be detached from the raw tire shape holding device 10 without interfering with the leaf spring 16.

  Therefore, according to this raw tire shape holding device 10, since the bead portion T2 of the raw tire T is urged outward from the inner surface T1, it is possible to prevent the raw tire T from being deformed by its own weight. In addition, the raw tire shape maintaining device 10 is different from the conventional bladder type device, and does not require a compressor, a pressure regulating valve, an on-off valve, piping, a power source, etc. for feeding compressed gas to the bladder, and has a large facility. The shape of the green tire T can be easily and reliably maintained without being required. Further, when removing the raw tire T from the apparatus 10, the holding of the raw tire T by the leaf spring 16 is released simply by pulling the raw tire T upward, so that the operation can be simplified. In addition, the pushing amount of the contact member 20 correlates with the reaction force of the leaf spring, that is, as the pushing amount increases, the reaction force of the leaf spring also increases, so that the deformation that the tire expands like a tire hanger can be suppressed. (In other words, the leaf spring 16 bends to make contact with the inner surface shape of the green tire, and the deformation can be suppressed by lifting the bead portion of the green tire from the inner surface side.) Further, according to the raw tire shape holding device 10, raw tires of various sizes can be held by changing the height of the contact member 20.

  Further, in this embodiment, since the raw tire shape holding device 10 is provided with two or more leaf springs, the bead portion T2 can be urged more evenly, and the shape of the raw tire T is also held evenly. become able to.

  The present invention has been described above based on the illustrated examples. However, the present invention is not limited to the above-described embodiment, and can be appropriately changed within the scope of the claims. For example, In the raw tire shape holding device of the above-described embodiment, there is one support column standing on the support base. However, two or more support tires may be held on one support base. .

  Thus, according to the present invention, it is possible to provide a raw tire shape holder and a raw tire shape holding device that can easily hold the shape of the raw tire without requiring a large facility.

DESCRIPTION OF SYMBOLS 1 Raw tire shape holder 3 Leaf spring 10 Raw tire shape holding device 12 Support base 14 Post 16 Leaf spring 16a One end of leaf spring 16b The other end of leaf spring 18 Slide member 20 Contact member 22 Connecting piece T Raw tire T1 Raw tire Inside of T2 Raw tire bead

Claims (4)

In a raw tire shape holder that is mounted on a raw tire and holds the shape of the raw tire,
The raw tire holder is a leaf spring that is convexly curved in one direction, and is inserted into the raw tire with the convex side surface of the leaf spring oriented toward the inner surface of the raw tire, A raw tire shape holder comprising at least one leaf spring that uniformly biases the bead portion of the raw tire outward and holds the shape of the raw tire evenly .   The raw tire shape holder according to claim 1, wherein the raw tire shape holder includes two or more leaf springs. A support base;
A support column erected on the support base;
At least one leaf spring extending along the axial center of the support column and curved outwardly as viewed from the support column and having one end positioned on the support base side fixed to the support column;
A slide member that is movable along the axis while the other end of the leaf spring is fixed and receiving the urging force of the leaf spring;
It is connected to the slide member, and when the raw tire is inserted around the support column, it is brought into contact with the bead portion of the raw tire and pushed toward the support base, and the leaf spring is shaped on the inner surface of the raw tire. In contact with each other and lifting the bead portion from the inner surface side of the green tire to suppress the deformation of the green tire while maintaining the shape of the green tire, and the slide member together A raw tire shape holding device comprising: an abutting member that is pushed toward the support base to bend the leaf spring.   The raw tire shape holding device according to claim 3, comprising two or more leaf springs.

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