JP2013035139A - Bead ring holding apparatus and usage of the apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bead ring holding apparatus which can give a product tire excellent uniformity by always carrying out positioning and holding of high precision without eccentricity or the like of the bead ring in spite of whether the periphery of the bead ring is covered with rubber or a textile or the like or not.SOLUTION: The bead ring holding apparatus comprises a plurality of holders 1 which are displaced to an inner or outer side in a radial direction and a support plate 2 which is hinge-connected with each inner end part in the radial direction of three or more holders 1 on its periphery and which can perform rocking displacement in a plane including the central axis line CL of a held annular bead ring 3. To the support plate 2, an engaging projection 4 which projects to one side of a hinge position 2a of the support plate 2 and holds the bead ring by being engaged therewith is provided, and further an engagement release part 5 which projects to the other side 2a of the hinge position and causes rocking displacement of the engaging projection 4 to an inner side in the radial direction by pushing up displacement to an outside in the radial direction is provided. Moreover a return spring 6 for energizing the engaging projection to an outside in the radial direction is disposed at the support plate 2.

Description

  The present invention accurately holds an annular bead ring in a predetermined position, and can effectively eliminate the risk of a decrease in product tire uniformity caused by unintentional eccentric maintenance of the bead ring. The present invention relates to a holding device and a method of using the holding device.

A conventional bead ring holding device is disclosed in Patent Document 1.
This is because a metal bead ring is provided at the radially inner end portion of each of a plurality of flat plate-like segments arranged at intervals in the circumferential direction and moved forward and backward in the radial direction. In this apparatus, a permanent magnet that is magnetically attracted is disposed, and a tire that is inserted and disposed on the inner peripheral side of the carcass band with the outer peripheral surface of the carcass band adhered to the inner peripheral surface of the bead ring. The molding drum is expanded and deformed, whereby the bead ring is fixed by a flange provided on the tire molding drum, and a carcass band is attached to the peripheral surface of the tire molding drum, and then each segment is attached to the bead ring. It is assumed that it is retracted radially outward from the outer diameter.

Japanese Patent Laid-Open No. 2006-142854

  However, since this prior art does not have means for correcting the eccentricity of the bead ring when the bead ring is magnetically attracted to the permanent magnet of the segment, the product tire is caused by the eccentric adsorption of the bead ring. There was a problem that the decline in uniformity was undeniable.

  On the other hand, if the bead ring has a rubber coating, textile coating, etc., and the magnet of the segment does not attract magnetism with a sufficiently large force, even if the initial attracting posture is appropriate, There has been a problem that misalignment, dropping, and the like of these are likely to occur.

  An object of the present invention is to solve such problems of the prior art, and the object of the present invention is that the bead ring is not covered with rubber, textile, or the like. Nevertheless, the present invention provides a bead ring holding device capable of imparting excellent uniformity to a product tire by always positioning and holding the bead ring without eccentricity or the like, and a method of using the device. .

  The bead ring holding device according to the present invention includes a plurality of holders that are spaced apart in the circumferential direction and are moved forward and backward in the radial inner and outer sides, for example, in synchronization with each other or independently of each other. A support plate that is swingably displaceable in a plane including a central axis of an annular bead ring that is hingedly connected to a radially inner end portion of each of the three or more holders on the circumference. The support plate is provided with a protruding protrusion that protrudes to one side of the hinge position of the support plate and engages and holds the inner peripheral surface of the bead ring, and protrudes to the other side of the hinge position. Providing an engagement release portion that causes a displacement displacement of the engagement protrusion inward in the radial direction by the upward displacement in the radially outward direction, and forming the support plate in a substantially bell crank shape or in a substantially triangular shape, So , To the supporting plate is made by arranging a return spring for biasing the engaging protrusion radially outwardly.

  Here, it is preferable that a stopper for restraining excessive swinging displacement of the hooking protrusion outward in the radial direction based on the action of the return string is disposed on the holder or the support plate.

  Also preferably. For example, a permanent magnet that magnetically attracts a bead ring made of metal is disposed on one or more of a plurality of holders that are hinged to a support plate.

  And the usage method of the bead ring holding | maintenance apparatus of this invention is a method of using the bead ring holding | maintenance apparatus in any one of Claims 1-3, Comprising: An annular bead ring is used as the engaging protrusion of a support plate. The carcass band and other carcass material on the molding drum are expanded and deformed while the positioning is held with high accuracy, and the carcass material displaces the engagement release portion of the support plate by pushing it outward in the radial direction. By doing so, the support plate is swung against the urging force of the return spring, and the bead ring positioned and held by the engaging protrusion is released from the engaging protrusion and set on the carcass material.

  In the bead ring holding device of the present invention, the bead ring is held by engaging the annular bead ring with the engaging protrusion of the support plate hinged to the holder under the selection of the radial position of each holder. Regardless of whether or not the ring has a rubber coating, textile coating, etc., the bead ring is positioned exactly as expected on its hooking projection without the risk of eccentricity, misalignment, dropping, etc. Can be held.

  Accordingly, while maintaining such a positioning and holding state of the annular bead ring by the support plate, the bead ring is, for example, in the radial direction of the engagement release portion of the support plate based on the diameter expansion deformation of the carcass material. Along with the outward displacement, the engaging protrusions are displaced inward in the radial direction against the urging force of the return spring, and the bead ring on each engaging protrusion is released onto the carcass material. Then, by sticking there, the possibility of occurrence of eccentricity to the bead ring can be sufficiently removed.

  Here, after releasing the bead ring from the engagement protrusion of the support plate, for example, each holder is displaced radially outward to prevent contact between the holder and the carcass material, and the engagement release portion of the support plate By separating the support plate from the surface of the carcass material, the engagement protrusion is automatically rocked and displaced by the biasing force of the return spring to, for example, a radial position where it can hold and hold the bead ring.

  In this case, the engagement protrusion of the support plate can be excessively oscillated and displaced to the outside in the radial direction beyond the predetermined radial position for positioning and holding the bead ring under the action of the return spring. However, if the holder or support plate is provided with a stopper that restrains excessive swinging deformation of the hooking protrusion to the outside in the radial direction based on the action of the return spring, each hooking hook that is hooked on the bead ring This eliminates the need to manually displace the part to a predetermined radial position and allows the annular bead ring to be directly engaged with the engaging protrusion to be positioned and held. It is possible to efficiently engage and hold at a predetermined position with high accuracy without the joy of the occurrence of.

  In addition, here, when a permanent magnet that magnetically attracts the bead ring is disposed on any one or more of the plurality of holders regardless of whether the support plate is hinge-connected or not, as described above. Thus, in addition to positioning and holding the bead ring with high accuracy by the hooking protrusion, the bead ring can also be sucked and held. On the condition that the bead ring is released together, the bead ring can be positioned and maintained more reliably, and the bead ring can be more sufficiently prevented from being eccentric.

  By the way, in the method of using the bead ring holding device of the present invention, in particular, the carcass material on the molding drum is expanded in a state where the annular bead ring is positioned and held with high precision on the engaging protrusion of the support plate. By displacing the radius, the carcass material is used to push and displace the engagement release portion of the support plate radially outward, thereby swinging the support plate against the urging force of the return spring and engaging engagement portion. The upper bead ring is released from the hooking protrusion and attached to the enlarged carcass material, which reduces the uniformity of the product tire due to eccentricity and displacement of the annular bead ring. Can effectively eliminate the fear of

It is sectional drawing in the plane containing the plane containing the central axis line of the bead ring hold | maintained which shows embodiment of the apparatus which concerns on this invention. It is process drawing which shows the effect | action of the apparatus shown in FIG.

Embodiments of the present invention will be described below based on the drawings.
In FIG. 1, 1 is arranged at intervals in the circumferential direction, and is, for example, displaced forward and backward by the individual cylinders, link mechanisms, etc., independently from each other inside or outside in the radial direction, or under mutual synchronization. A plurality of holders, for example one of the flat plate-like segments.

  In this case, the top of one of the support plates 2 having a substantially bell crank shape or a substantially triangular shape is hingedly connected to the inner end portion in the radial direction of each of the three or more segments 1 on the circumference. As shown by a virtual line in the drawing, the plate 2 can be oscillated and displaced in a plane including the central axis CL of the annular bead ring 3 to be held.

  Further, here, each support plate 2 is provided with a hooking protrusion 4 that protrudes to one side of the hinge position 2a of the support plate 2 and engages with the inner peripheral surface of the bead ring 3 to position and hold it. An engaging release portion 5 that protrudes toward the other side of the hinge position 2a with respect to the protruding portion 4 and that causes the engaging protrusion 4 to swing inward in the radial direction by a radially upward displacement is provided.

  By the way, the support plate 2 is provided with a return spring 6 that urges the engaging protrusion 4 outward in the radial direction, for example, a beard spring or a coil spring provided around the hinge position 2a. .

  According to this return spring 6, in many cases, the engaging projection 4 is excessively oscillated and displaced to the outside in the radial direction. Therefore, the holder 1 or the support plate 2, preferably the support plate in the drawing, is preferable. 2 is provided with a stopper 7 for abutting against the back surface 1a of the holder 1 and for specifying the swing limit position of the engaging projection 4 so that excessive swing displacement of the engaging projection 4 can be reduced as required. For example, the limit position of the engagement protrusion 4 on the radially outer side is set as the radial position where the bead core 3 is properly positioned and held.

  According to the engaging protrusion 4 of the support plate 2, the bead ring 3 is engaged with the engaging ring 3 regardless of whether or not the bead ring 3 has a covering member 3 a such as a rubber coating or a textile tire covering on the peripheral surface. 4, the bead ring 3 can be positioned and held with high accuracy as expected without causing any eccentricity or the like in the bead ring 3.

  Here, the bead ring holding force is obtained by engaging each of the engaging protrusions 4 with the inner peripheral surface of the bead ring 3, and the engaging protrusions 4 are radially applied to the bead ring 3 under the action of the return spring 6. When the position of the stopper 7 is selected so as to exert an outward force, the bead ring 3 can be magnetically attracted to any one or more of a plurality of holders, here the segment 1 It can also be increased by providing a permanent magnet 8 that does this.

  In this latter case, the magnetic force of the permanent magnet 8 can be smoothly delivered onto the carcass material as expected by the bead ring 3 by the release swing of the engaging projection 4 of the support plate 2 inward in the radial direction. It is necessary to make it about.

  The bead ring 3 positioned and held by the bead ring holding device configured as described above is transferred to the carcass material on the forming drum, that is, the use of the holding device is shown in FIG. One of the rings 3 can be performed as illustrated in the partial cross-sectional view along the bead ring 3 and the central axis CL of the forming drum.

  Here, first, with the bead ring 3 properly positioned and held on the engaging protrusion 4 of the support plate 2 hinged to the segment 1 as described above, the inside of the bead ring 3 is moved to FIG. As illustrated in a), the molding drum 12 in which the carcass material 11 is formed in advance is inserted in the reduced diameter posture thereof, and then the molding drum 12 is used together with the carcass material 11 as illustrated in FIG. In this way, the engagement release portion 5 of the support plate 2 is pushed up and displaced radially outward by the carcass material 11.

  This push-up displacement of the latch release portion 5 causes the support plate 2 to swing around the hinge position 2a against the urging force of the return spring 6 to displace the latch projection 4 inward in the radial direction. As a result, the bead ring 3 positioned and held on the engaging protrusion 4 is smoothly delivered onto the carcass material 11 on the growth drum 12 that is continuously expanded and deformed, and there is the expected result. It will be pasted as you did.

  After the bead ring 3 is handed over the carcass material 11 in this way, each segment 1 is moved outward in the radial direction under the action of a cylinder, a link mechanism, etc., as illustrated in FIG. The retracting position is changed to prevent the segment 1 and the carcass material 11 from interfering with each other, and the engagement release portion 5 of the support plate 2 is separated from the carcass material 11, thereby the action of the return spring 6 and the stripper 7. Below, the engaging protrusion 4 of the support plate 2 is returned to its initial position illustrated in FIG.

  Such delivery of the bead ring 3 is performed in the same manner for other bead rings that form a pair.

  And after finishing the delivery operation of the bead ring 3 once, the tire forming drum 12 is extracted from between the segments 1 together with the delivered bead ring 3, and then each segment 1 is moved to the required radial inner side. The position of the next bead ring on each of the engaging projections 4 is made to stand by by advancing displacement or the like to the position.

  Thus, here, the support plate 2 is oscillated and displaced by the diameter-enlarging deformation of the tire molding drum 12, and the bead ring 3 on the engaging protrusion 4 is displaced inward in the radial direction of the engaging protrusion 4. Intention to the bead ring 3 regardless of whether or not the bead ring 3 has a rubber coating, a textile coating, or the like by passing it smoothly and appropriately onto the carcass material 11 that is expanded and deformed together with the molding drum 12. Occurrence of the eccentricity that does not occur can be sufficiently prevented.

  This is because, under the selection of the position where the stopper 7 is arranged, a force is applied to the inner peripheral surface of the carcass ring 3 that is positioned and held by the engaging protrusion 4 by the return spring 6 toward the outer side in the radial direction. The holding force of the carcass ring 3 by the portion 4 is increased, and the holding force of the carcass ring 3 is increased by the magnetic attraction of the permanent magnets 8 arranged in one or more segments 1, and the bead ring 3 may be unintentionally displaced. This is particularly noticeable when is effectively removed.

1 Segment 1a Back 2 Support plate 2a Hinge position 3 Bead ring 3a Cover member 4 Engagement protrusion 5 Engagement release part 6 Return spring 7 Stopper 8 Permanent magnet 11 Carcass material 12 Molding drum CL Center axis

JP 2006-142584 JP

Preferably, for example, a permanent magnet that magnetically attracts a bead ring made of metal is disposed on one or more of the plurality of holders to which the support plate is hinge-connected.

Claims (4)

A plurality of holders arranged at intervals in the circumferential direction and displaced inward and outward in the radial direction and three or more holders on the circumference are hinged to the inner end portions in the radial direction and held. A support plate capable of swinging and displacing in a plane including the center axis of the annular bead ring,
The support plate is provided with a hooking protrusion that protrudes to one side of the hinge position of the support plate and engages and holds the bead ring, and protrudes to the other side of the hinge position, and is pushed outward in the radial direction. A bead formed by providing an engagement release portion that causes the engagement protrusion to swing radially inward, and a return spring that urges the engagement protrusion toward the outside in the radial direction on the support plate. Ring holding device.   The bead ring holding device according to claim 1, wherein a stopper that restrains excessive swinging displacement of the hooking protrusion outward in the radial direction is disposed on the holder or the support plate.   The bead ring holding device according to claim 1 or 2, wherein a permanent magnet that magnetically attracts the bead ring is disposed on any one or more of the plurality of holders.   It is a usage method of the bead ring holding | maintenance apparatus in any one of Claims 1-3, Comprising: The state where the annular bead ring was positioned and hold | maintained at the latching protrusion part of the support plate, the carcass raw material on a forming drum is used. Enlarging and displacing the support plate with the carcass material by pushing up and displacing the engagement release portion of the support plate radially outward, the support plate is swung against the urging force of the return spring, and the engagement protrusion A method for using a bead ring holding device that sets the upper bead ring on a carcass material.

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