JP4731268B2 - Tire correction method and correction device - Google Patents

Description

  The present invention relates to a correction method and a correction device for correcting a collapse of a small block in a vulcanized tire including a tread portion in which blocks divided into a plurality of small blocks are formed by sipe.

For example, a tire used for a vehicle that travels in a cold region includes a tread portion in which a large number of blocks are formed in order to increase grip force and improve traveling performance on an icy snowy road. Furthermore, each block is formed with a narrow groove called a sipe that divides the block into a plurality of small blocks (see, for example, Patent Document 1), and an increase in grip force generated by the edges of the small blocks scratching the road surface (hereinafter, referred to as “Sipe”). The “edge effect”)) further improves running performance.
The sipe is formed in a process in which the green tire is vulcanized and molded by a blade constituting a part of a mold of a vulcanizing apparatus that vulcanizes and molds the green tire.
Japanese Patent Laid-Open No. 11-208220

By the way, when the vulcanization molding by the vulcanizer is finished and the mold is separated from the tire after the vulcanization molding, the small block in which the block is divided by the sipe is, for example, the mold ejection direction. May not be matched with the forming direction in the radial direction of the sipe, and may be tilted in the die-cutting direction by the mold including the blade. For example, as shown in FIG. 7A, in the case of a sector mold die that is divided in the circumferential direction and the die cutting direction is the radial direction, the die cutting direction in the radial direction and the tire T Since the tread portion a does not coincide with the formation direction of the sipe b in the radial direction, the small block c is tilted in the die-cutting direction by the blade portion d and the portion f of the mold that forms the lateral groove e of the tread portion a.
Such a collapse of the small block c is further increased when a mold release agent such as aqueous silicon is not applied to the mold because the resistance to pulling out the mold including the blade d is increased.
When the small block c falls down, as shown in FIG. 7B, adjacent small blocks c are in contact with each other across the sipe b, and the width of the sipe b is defined by the blade d. The edge c1 on the falling direction side of the small block c that has fallen narrower than the width is smaller than the edge c2 on the opposite side to the falling direction, or compared to the adjacent small block c in the falling direction. It will be located inward of the direction, reducing the edge effect.
Note that, in FIG. 7, FIG. 3B and FIG. 4 to be described later, the fall of the small block is exaggerated for convenience of explanation.

The present invention has been made in view of such circumstances, the invention of claim 1-7, wherein the correction method or modification device modifies the collapse of the small blocks of the tread portion in the tire after vulcanization The purpose is to provide. The invention described in claims 1, 2, 5, 6 , and 7 further aims to facilitate the correction of the collapse, and the invention described in claim 3 further includes processing of the tire after vulcanization molding. The invention according to claim 4 further aims to correct the collapse of the small block when the mold release agent is not used in the mold of the vulcanizer. The invention described in claim 7 further aims to improve the efficiency of the correction process and reduce the size of the correction device.

According to the first aspect of the present invention, a vulcanized tire including a tread portion in which a block divided into a plurality of small blocks is formed by a sipe formed by a mold of a vulcanizing device is used. By moving relative to the pressing member that presses inward in the direction, the pressing member deforms the small block by a frictional force between the small block and corrects the collapse of the small block , The tire correction method is characterized in that a lubricating liquid is allowed to enter the sipe before the small block is pressed by the pressing member .

According to this, by moving the vulcanized tire and the pressing member relative to each other, the small block pressed by the pressing member is deformed by the frictional force, and the collapse of the small block is corrected.
When the small blocks are in contact with each other due to the collapse of the small block, the small block that is deformed by being pressed by the pressing member is easily slid with respect to the other small block due to the lubricating liquid that has entered the sipe. Deformation of small blocks by force becomes easy.

According to a second aspect of the invention, the method of correcting tire according to claim 1, wherein, in which the action of internal pressure to the tire.

  According to this, compared with the case where the internal pressure is not acting on the tire, when the small block is pressed by the pressing member, the small block adjacent to the pressed small block is prevented from being greatly dented together. Therefore, the small block can be easily deformed by the pressing force and frictional force of the pressing member.

According to a third aspect of the invention, used in the method of correcting tire according to claim 1, wherein said pressing member presses said small block during post-cure inflation process of the tire, the lubricant in the post-cure inflation process Is a coolant to be used.

  According to this, the correction of the fall of the small block is performed in the course of the post-cure inflation process, and the post-cure inflator support device is used as the tire support device, and the cooling used for the post-cure inflation process as a lubricating liquid. Since the liquid is used, there is no need to separately prepare a tire support device and a lubricating liquid.

The invention according to claim 4 is the tire correction method according to any one of claims 1 to 3 , wherein the tire has a laminated structure in which long bodies made of unvulcanized rubber materials are laminated. A tire is vulcanized and molded by the vulcanizer.

  According to this, even when the release agent cannot be used in the mold of the vulcanizer because the release agent enters between the laminated long materials, the small block collapses due to die cutting. It is corrected by the pressing member.

According to a fifth aspect of the present invention, there is provided a first support device for supporting a vulcanized tire including a tread portion in which a block divided into a plurality of small blocks is formed by a sipe formed by a mold of the vulcanizer. And a second support device that supports a pressing member that presses the small block inward in the radial direction, and the first support device and the second support device cooperate to push the tire into the pressing member. The pressure member deforms the small block by a frictional force between the pressing member and the small block, corrects the collapse of the small block, and stores the liquid tank in which the lubricating liquid is stored. And the first support device supports the tire in a state where a part of the tread portion is immersed in a lubricating liquid in a circumferential direction, and the pressing member is disposed below a surface of the lubricating liquid. With tire correction device That.

According to this, the small block pressed by the pressing member is deformed by the frictional force by the correction device that moves the tire relative to the pressing member by the cooperation of the first and second support devices, and the small block is deformed. The fall of is corrected.
Further, since the small block is pressed by the pressing member below the surface of the lubricating liquid, the lubricating liquid can surely enter the sipe before the small block is pressed. When the small blocks are in contact with each other due to the collapse of the small block, the small block that is deformed by being pressed by the pressing member is easily slid with respect to the other small block by the lubricating liquid that has entered the sipe. The small block is easily deformed by the frictional force between the members.

The invention according to claim 6 is a first support for supporting a vulcanized tire including a tread portion in which blocks divided into a plurality of small blocks are formed by a sipe formed by a mold of a vulcanizer. And a second support device that supports a pressing member that presses the small block radially inward, and the first support device and the second support device cooperate to press the tire. A liquid tank in which lubricating liquid is stored by correcting the tilting of the small block by moving the relative to the member to deform the small block by the frictional force between the pressing member and the small block. The first support device supports the tire in a state in which a part of the tread portion is immersed in the lubricating liquid in the circumferential direction, and the pressing member is disposed on the liquid surface of the lubricating liquid.
This is a tire correcting device.

According to this, the small block pressed by the pressing member is deformed by the frictional force by the correction device that moves the tire relative to the pressing member by the cooperation of the first and second support devices, and the small block is deformed. The fall of is corrected.
In addition, when the small blocks are in contact with each other due to the collapse of the small block, the small block that is deformed by being pressed by the pressing member due to the lubricating liquid that has entered the sipe is easily slid against the other small block. The small block is easily deformed by the frictional force between the members.

According to a seventh aspect of the present invention, in the tire correction device according to the fifth or sixth aspect , during the correction process, the first support device rotates the tire around an axis, and the second support device is the pressing member. Is supported so as to be movable in the radial direction.

  According to this, during the correction process, it is possible to adjust the position of the pressing member that enables the adjustment and pressing and releasing of the pressing force to the small block by the second support device. In addition, since the tire rotates with respect to the pressing member during the correction process, it is easy to press the small block with the pressing member over the entire circumference of the tire, and the pressing member is moved along the tread portion of the tire. There is no need to move in the circumferential direction.

According to invention of Claim 1, the following effect is show | played. That is, since the fall of the small block is corrected, it is possible to prevent or suppress the reduction of the edge effect due to the small block formed by the sipe. Further, since the small liquid is easily deformed by the frictional force by the lubricating liquid, it is easy to correct the fall of the small block.
According to invention of Claim 2 , in addition to the effect of the invention of the cited claim, there exists the following effect. That is, since the deformation of the small block pressed by the pressing member is facilitated, it is easy to correct the fall of the small block.
According to invention of Claim 3 , in addition to the effect of the invention of the cited claim, there exist the following effects. That is, since the correction of the collapse of the small block and the post-cure inflation process are performed at the same time, the processing of the tire after vulcanization is made more efficient, and it is not necessary to prepare a tire support device and a lubricating liquid separately. Cost is reduced.
According to invention of Claim 4 , in addition to the effect of the invention of the cited claim, there exists the following effect. That is, when the mold release agent is not used in the mold of the vulcanizer, the falling of the small block can be corrected by the pressing member.
According to the fifth aspect of the present invention, the correction device including the first and second support devices can achieve the same effect as the first aspect of the present invention, and can reliably inject the lubricating liquid into the sipe. The lubrication fluid makes it easy to correct the fall of the small block.
The invention according to claim 6 also has the same effect as that of the invention according to claim 5.
According to the invention described in claim 7, in addition to the effect of the invention described in the cited claim, the following effect is produced. That is, the position of the pressing member that enables adjustment and pressing and release of the pressing force to the small block can be adjusted, so that the small block is appropriately corrected, The small block can be brought close to the normal state quickly, so that the efficiency of the correction process can be improved and the pressing member does not need to be moved in the circumferential direction of the tire, so that the correction device can be downsized.

Hereinafter, embodiments of the present invention will be described with reference to FIGS.
Referring to FIG. 1, a tire correcting device 1 to which the present invention is applied is used for manufacturing a pneumatic tire for a vehicle, for example, a studless tire.
The correction device 1 is a tire 2 formed by vulcanization molding of a green tire by a vulcanization device (not shown) having a mold (it is a tire after vulcanization molding, and is simply referred to as “tire 2” hereinafter). ) Post-cure inflation process (hereinafter referred to as “PCI process”) 10, and a pressing member that presses the tread portion 21 of the tire 2 radially inward. A pressing device 40 including a pressing rod 41 as

  In the specification or claims, the axis is the axis of the tire 2, the axis direction is the direction in which the axis extends, and the radial direction and the circumferential direction are each a diameter centered on the axis of the tire 2. Direction and circumferential direction.

  The tire 2 is a green mold having a laminated structure in which a ribbon-like rubber member made of an unvulcanized rubber material as a long body is spirally wound in the circumferential direction. A plurality of blocks 23 partitioned by a circumferential groove 22a and a lateral groove 22b (that is, a groove extending in the axial direction) as shown in FIG. 3 (A). A tread portion 21 is provided. Each block 23 includes one or more plate-shaped blades as sipe forming members constituting a part of the mold, and in this embodiment, a plurality of sipes 24 extending in parallel to the axial direction. Divided into small blocks 25.

  The small block 25 is formed in the radial direction of the sipe 24 when the vulcanization is completed and the mold and the tire 2 are separated (or the blade extends in the radial direction). Therefore, as shown in FIG. 3B, the small blocks 25 are in contact with each other, or the width of the sipe 24 is the design width. It may become narrower than W and fall down. In FIG. 3B, the small block 25 when not in a collapsed state is indicated by a two-dot chain line, and the design width W is the width of the sipe 24 defined by the blade.

  Further, in this embodiment, since the green tire has the laminated structure, a mold release agent such as aqueous silicone applied to the mold is intruded between the laminated rubber members in order to facilitate the mold release. The mold release agent cannot be used because it may cause cracks. For this reason, when the small block 25 is in the fall state, the degree of the fall is greater than when the release agent is used.

The correction device 1 will be further described.
Referring to FIGS. 1 and 2, PCI processing for preventing a reinforcing cord as a reinforcing material used in a green tire from being deformed by contraction due to cooling after being taken out from the vulcanizing apparatus. The PCI device 10 that performs the above includes a support device A1 that supports the tire 2, a cooling device B that cools the tire 2 supported by the support device A1, and a pressure adjustment device C that adjusts the internal pressure of the tire 2. .

  The support device A1 supports, at its bead portion 27, the tire 2 that is gripped by the gripping member E of the transport device and transported to a predetermined processing position where the correction device 1 described later performs correction processing of the tilting of the small block 25. A pair of rims 11a and 11b serving as a support and a drive mechanism 12 that rotationally drives the tire 2 around its axis.

  The rims 11a and 11b transmit the rotational driving force of the drive mechanism 12 to the tire 2 so that the inner space 20 of the tire 2 formed by the tire 2 and the rims 11a and 11b is hermetically sealed. The tire 2 is supported so that the 2 rotates.

  The drive mechanism 12 is integrally coupled to a drive shaft 13a that is integrally coupled to one rim 11a, a reverse-rotatable electric motor 14 as a drive source that rotationally drives the drive shaft 13a, and the other rim 11b. A driven shaft 13b, a hydraulic cylinder 15 as an actuator for reciprocally driving the driven shaft 13b in parallel to the axial direction and rotatably supporting the driven shaft 13b, and a connecting portion 16a for connecting both rims 11a and 11b so as to be integrally rotatable 16b and bearings 17a and 17b for supporting the drive shaft 13a and the driven shaft 13b, respectively. A control device that controls the electric motor 14 and the hydraulic cylinder 15 controls the rotation speed and direction of the electric motor 14 and controls the operation of the hydraulic cylinder 15.

  The connecting portions 16a and 16b are located at positions eccentric from the driven side connecting portion 16b constituted by a shaft integrally coupled to the rim 11a and the axis that is also the rotation center line of the tire 2 driven and rotated by the drive mechanism 12. The driving side connecting portion 16a is configured by a driving side connecting portion 16a formed by the portion of the rim 11a provided with the fitting hole 16a1, and the driven side connecting portion 16a and the driven side connecting portion 16a are fitted into the fitting hole 16a1. In a state where the part 16b is connected, both the rims 11a and 11b are connected so as to rotate integrally and so that the tire 2 occupies the processing position.

  The cooling device B that cools the tire 2 with residual heat remaining during vulcanization molding from the outer peripheral side thereof includes a liquid tank 32 in which cooling water 31 as a cooling liquid is stored, and a cooling liquid that adjusts the temperature of the cooling water 31. And an adjusting device (not shown). When the tire 2 occupies the processing position, a part of the tire 2 is submerged below the liquid surface 31a in the radial direction. The position of the liquid surface 31a with respect to the tire 2 is set from the viewpoint of cooling so that the degree of vulcanization due to residual heat in each part such as the tread portion 21 and the sidewall portion 28 of the tire 2 is appropriate. It is a position that reaches the sidewall portion 28 including at least a part of the tread portion 21 in the circumferential direction and radially outward from the rims 11a and 11b. For this reason, before each block 23 is pressed by the pressing rod 41, the entire block 23 is positioned below the liquid surface 31a in one block 23 unit. Further, the temperature of the cooling water 31 is adjusted to an appropriate temperature by supplying or discharging the cooling water 31 to or from the liquid tank 32 based on a detection signal from a temperature sensor that detects the temperature of the cooling water 31. It is adjusted to become.

The pressure adjusting device C includes a pressurized fluid supply device 35 that supplies pressurized air as a pressurized fluid, and a valve 36 that is provided on the rim 11 b and introduces the pressurized air into the internal space 20. The internal pressure of the tire 2 (that is, the pressure in the internal space 20) is adjusted to a set pressure appropriate for the PCI processing by the pressurized air introduced into the internal space 20 through the valve 36.

  The pressing device 40 includes a pressing rod 41 disposed below the liquid surface 31a in the liquid tank 32, and a support device A2 that supports the pressing rod 41 and is provided in the liquid tank 32. The pressing rod 41 is formed of a member that is formed of an arbitrary material such as metal, synthetic resin, or wood and has a required rigidity for pressing the small block 25. In this embodiment, the pressing rod 41 is formed of a cylindrical member. The support device A2 includes a moving table 43 that is coupled to a fixed table 42 that is fixed to the bottom wall 32a of the liquid tank 32 so that the position of the supporting device A2 can be adjusted. It is composed of a pair of support portions 44a and 44b that are coupled so that their positions can be adjusted in the vertical direction or in the direction perpendicular to the liquid surface 31a. In each of the support portions 44a and 44b, a slit 45 into which an end portion of the pressing rod 41 is inserted extends in the vertical direction, and the pressing rod 41 against the tire 2 is within the moving range of the moving table 43 and the forming range of the slit 45. Can be adjusted.

  The pressing rod 41 supported by the supporting device A2 so that the position of the pressing rod 41 can be adjusted is small so that the small block 25 can be deformed by a frictional force with the small block 25 in the collapsed state. The block 25 is positioned at a pressing position that presses the block 25 inward in the radial direction, and fixed to the support device A2. The pressing rod 41 is arranged non-parallel to the axis depending on the position of the block 23 in addition to the case where the pressing rod 41 is arranged parallel to the axis as shown in FIG. Is done.

  Here, both support devices A1 and A2 constitute the support device of the correction device 1 as the first and second support devices, respectively. The drive mechanism 12 including the electric motor 14 is a drive unit that relatively moves the tire 2 and the pressing rod 41. Therefore, the support device A1 including the drive mechanism 12 and the support device A2 that supports the pressing rod 41 in a stationary manner move the tire 2 relative to the pressing rod 41 in cooperation.

The operation of the correction device 1 will be described.
Referring to FIG. 1 (A), the tire 2 gripped by the gripping member E in a state where the rim 11b is driven by the hydraulic cylinder 15 to occupy the retracted position and the connection between the rims 11a and 11b is released. The bead portion 27 is immersed in the cooling water 31 accommodated in the liquid tank 32 and carried to the processing position between the support portions 44a and 44b so that the bead portion 27 is supported by the rims 11a and 11b. When the tire 2 occupies the processing position, the position of the pressing rod 41 is adjusted with respect to the fixed base 42 so that the pressing rod 41 presses the small block 25 (see FIG. 3) radially inward. And it is adjusted in advance through position adjustment of the pressing rod 41 with respect to the support portions 44a and 44b.

  Thereafter, the rim 11b driven by the hydraulic cylinder 15 advances toward the rim 11a, the connecting portions 16a and 16b are connected, and both the rims 11a and 11b support the tire 2 in an airtight state. Next, the gripping member E releases the tire 2, pressurized air is supplied to the internal space 20 through the valve 36, and the internal pressure of the set pressure is applied to the tire 2, as shown in FIG. .

  The electric motor 14 is operated, the tire 2 rotates at the rotation speed and the rotation direction controlled by the control device, the tire 2 is cooled from the outer peripheral side, and the PCI process is performed. During the PCI process, in the block 23 pressed by the pressing rod 41, the small block 25 is deformed by the pressing force of the pressing rod 41, and the rotating tire 2 moves relative to the pressing rod 41. By doing so, the small block 25 is deformed so as to bend in the counter-rotating direction by the frictional force acting between the pressing rod 41. For this reason, it is possible to correct the fall of the small block 25 that is in a fallen state due to die cutting by the pressing rod 41. During the correction process, the tire 2 rotates around the axis, and the pressure rod 41 after the position adjustment is in an immobile state at the pressure position.

  More specifically, referring to FIG. 4, in each block 23 (see FIG. 3B) having the small block 25 in the collapsed state, the pressing rod 41 is moved from the small block 25 a at the end in the rotational direction. The small blocks 25a to 25e are sequentially pressed radially inward to the small block 25e at the end on the counter-rotation direction side.

  Referring to FIG. 4A, the small block 25a pressed by the pressing rod 41 is slightly slid with respect to the small block 25b which is adjacent to and in contact with the counter-rotation direction by the pressing force. Deform. At this time, the cooling water 31 (see FIG. 1 (B)) entering the sipe 24 functions as a lubricating liquid, the sliding resistance is reduced, and the small blocks 25a and 25b are easily separated from each other. At the same time, the small block 25a is deformed so as to bend in the counter-rotating direction by the friction force between the pressing rod 41 and the small block 25a, and the falling of the small block 25a that has fallen in the rotating direction is corrected. As a result, the degree of collapse of the small block 25a is reduced, and the state of the normal small block 25 indicated by a two-dot chain line in the figure is approached.

  4B, when the small block 25b is pressed by the pressing rod 41 by the subsequent rotation of the tire 2, the small block 25b pressed by the pressing force of the pressing rod 41 becomes the small block. It slides with respect to 25c, and at the same time, the sipe 24 is deformed in the counter-rotating direction by frictional force so that the falling of the small block 25b is corrected. At this time, both the small blocks 25b and 25c are easily separated by the above-described lubricating action of the cooling water 31, that is, the sipe 24 is easily opened.

  Similarly, as the tire 2 rotates, the small blocks 25c, 25d, 25e located on the opposite side of the small block 25b are sequentially pressed by the pressing rod 41, and the collapse of the small blocks 25c, 25d, 25e is corrected. Is done. Then, by correcting the fall of the small block 25 in the block 23, as shown in FIG. 4C, the fall of all the small blocks 25 in one block 23 is corrected.

  As described above, the pressing rod 41 deforms the small block 25 so as to bend in the direction opposite to the rotation direction of the tire 2 by the frictional force generated between the pressing rod 41 and the width of the sipe 24. Here, the width of the sipe 24 is corrected when the width is different from the design width W, for example, when the width is narrower than the design width W (when the adjacent small blocks 25 are in contact with each other across the sipe 24). Means to approach the design width W.

  In addition, since the direction of tilting of the small block is not uniform, the tilt of the small block 25 that is tilted in the opposite direction to the small block 25 is corrected by reversing the rotation direction of the tire 2. The Further, at the time when the PCI processing is completed, the tire 2 is alternately rotated forward and backward in a predetermined range in the circumferential direction, so that the small block 25 in the block 23 within the predetermined range falls for each predetermined range. Can be corrected.

  Then, after the PCI processing and the fall of the small block 25 are corrected, the air in the internal space 20 is discharged, the support of the tire 2 by the support device A1 is released, and the gripping member E causes the tire 2 to be used for the next process. Transport to.

Next, operations and effects of the embodiment configured as described above will be described.
The support device A1 and the support device A2 of the correction device 1 cooperate with each other to form the vulcanized molded tire 2 including the tread portion 21 in which the blocks 23 divided into the plurality of small blocks 25 are formed by the sipe 24. By moving the small block 25 relative to the pressing rod 41 that presses inward in the radial direction, the pressing rod 41 deforms the small block 25 by the frictional force between the small block 25 and the small block 25. Correct the fall. As a result, since the falling of the small block 25 is corrected by the pressing rod 41, it is possible to prevent or suppress the reduction of the edge effect by the small block 25 formed by the sipe 24.

  By causing the cooling water 31 to enter the sipe 24 before the small block 25 is pressed by the pressing rod 41, the cooling water 31 that has entered the sipe 24 when the small blocks 25 are in contact with each other due to the fall of the small block 25. Accordingly, the small block 25 that is pressed and deformed by the pressing rod 41 is easily slid with respect to the other small block 25, and the deformation of the small block 25 by the frictional force is facilitated. Becomes easier.

  By applying the internal pressure to the tire 2, the small block 25 adjacent to the pressed small block 25 when the small block 25 is pressed by the pressing rod 41 compared to the case where the internal pressure is not applied to the tire 2. Are prevented from being greatly dented inward, so that the small block 25 can be easily deformed by the pressing force and frictional force of the pressing rod 41, so that the tilting of the small block 25 can be easily corrected.

  The pressing rod 41 presses the small block 25 during the PCI processing of the tire 2, and the lubricating liquid to enter the sipe 24 is the cooling water 31 used for the PCI processing. In addition, the supporting device A1 of the PCI device 10 is used as the supporting device for the tire 2 and the cooling water 31 used for the PCI treatment is used as the lubricating liquid. Need not be prepared separately. As a result, the correction of the collapse of the small block 25 and the PCI processing are performed at the same time, so that the processing of the tire 2 after vulcanization is made more efficient, and there is no need to separately prepare a supporting device for the tire 2 and a lubricating liquid. So the cost is reduced.

  The tire 2 is formed by vulcanizing and molding a green tire having a laminated structure in which ribbon-like rubber members made of unvulcanized rubber material are laminated, by the vulcanizing device. Even when the mold release agent cannot be used in the mold of the vulcanizer because the mold release agent enters in between, the tilting of the small block 25 caused by the die cutting is corrected by the pressing rod 41. As a result, the tilting of the small block 25 can be corrected by the pressing rod 41 when no release agent is used in the mold of the vulcanizer. And by this correction process, the fall of the small block 25 is corrected to such an extent that it is inferior to the case where a release agent is used.

  The supporting device A1 rotates the tire 2 around the axis, and the supporting device A2 supports the pressing rod 41 in an immobile state, so that the tire 2 rotates with respect to the immovable pressing rod 41. Since it becomes easy to press the small block 25 with the pressing rod 41 over the circumference, it is easy to correct the collapse, and it is necessary to move the pressing rod 41 in the circumferential direction along the tread portion 21 of the tire 2. Since there is no, the correction apparatus 1 can be reduced in size.

  A support tank A1 is provided with a liquid tank 32 in which cooling water 31 as a lubricating liquid is stored, and the supporting device A1 supports the tire 2 in a state where a part of the tread portion 21 is immersed in the cooling water 31 in the circumferential direction. Since the small block 25 is pressed by the pressing rod 41 under the liquid surface 31a of the cooling water 31 by being arranged below the liquid surface 31a of the water 31, the cooling water 31 is sipe before the small block 25 is pressed. 24 can be surely invaded.

Next, a reference example will be described with reference to FIG. The correction device 5 of this reference example is different from the correction device 1 of the first embodiment in that the structure of the support device and the lubricant are not used, and the other configuration is basically the same. Therefore, description of the same part is omitted or simplified, and different points will be mainly described. In addition, about the member same as the member of 1st Embodiment, or the corresponding member, the same code | symbol was used as needed.

  The correction device 5 includes a support device A3 including a forming drum 51 as a support and a drive mechanism 52, and a pressing device 40 similar to the correction device 1.

  The forming drum 51 is used to manufacture a green tire of the pneumatic tire 2 capable of run-flat running, and the outer diameter can be adjusted by a known mechanism such as moving a segment divided in the circumferential direction in the radial direction. The drum is a drum and is driven to rotate about an axis by a drive mechanism 52 including an electric motor 53.

  The vulcanized tire 2 gripped by the gripping member of the transport device is inserted to a predetermined position on a molding drum 51 (indicated by a two-dot chain line in FIG. 5) in a reduced diameter state, and thereafter The pair of support portions 51a and 51b of the molding drum 51 whose diameter has been expanded is supported in a hermetic state at the bead portion 27. An internal space 20 formed by the forming drum 51 and the tire 2 through the introduction pipe 37 is pressurized air from the pressurized fluid supply device 35 of the pressure adjusting device C including the introduction pipe 37 disposed in the molding drum 51. The internal pressure of the tire 2 is adjusted to the set pressure.

  The pressing device 40 has the same structure as that of the correction device 1 except that the pressing device 40 is not arranged in the coolant, and the pressing rod 41 is positioned so as to press the small block 25 of the block 23 of the tread portion 21.

  In the correction device 5, as in the correction device 1, the small block 25 is deformed by the pressing force of the pressing rod 41, and the rotating tire 2 moves relative to the pressing rod 41, so that the pressing rod The small block 25 is deformed so as to bend in the counter-rotating direction by the frictional force acting between the pressure block 41 and the fall of the small block 25 is corrected by the pressing rod 41.

According to this reference example , the same operations and effects as those of the first embodiment are exhibited except for the effect of using the cooling water 31 as the lubricating liquid and the effect of using the PCI device 10. The effects and effects of
Since the molding drum 51 for producing the run flat tire is used, it is not necessary to separately provide a support device for supporting the tire 2 in order to correct the fall of the small block 25, so that the cost is reduced.

Next, a second embodiment of the present invention will be described with reference to FIG. The correction device 1 according to the second embodiment is basically the same as the correction device 1 according to the first embodiment except for the pressing device 60.

  The pressing device 60 includes a pressing rod 41 disposed above the liquid surface 31a of the cooling water 31 in the liquid tank 32, and a support device A3 that supports the pressing rod 41 and is provided outside the liquid tank 32. . The support device A3 as the second support device is linear with respect to the tire 2 by the hydraulic cylinder 61 as an actuator fixed on the base and the pressing rod 41 being integrally fixed and driven by the hydraulic cylinder 61. And a support rod 62 that reciprocates. The support device A3 moves the support rod 62 so that the pressing rod 41 moves toward the axis of the tire 2 by controlling the pressure of the hydraulic oil supplied to the hydraulic cylinder 61 with the hydraulic control device. The support device A3 that supports the pressing rod in a radial direction, in other words, a linearly movable support in the direction approaching and moving away from the tire axis, presses the tire 2 during the correction process. The pressing rod 41 is moved between an advanced position (shown by a solid line in FIG. 6) that is a position and a retracted position (shown by a two-dot chain line in FIG. 6) where the pressing rod 41 does not contact the tire 2. Thus, the position of the pressing rod 41 is adjusted.

  During the correction process, in the block 23 (see FIG. 4) of the tread portion 21 pressed by the pressing rod 41, the small block 25 (see FIG. 4) is deformed by the pressing force of the pressing rod 41, and further rotated. When the tire 2 to be moved moves relative to the pressing rod 41 supported by the hydraulic cylinder 61, the small block 25 is deformed so as to bend in the counter-rotating direction by the frictional force acting between the pressing rod 41 and the tire 2 The fall of the small block 25 is corrected.

  By the way, the state of falling of the small block 25 such as the degree of falling and the direction of falling, including the presence or absence of falling, is not uniform and differs depending on the position of the block 23, particularly the position in the circumferential direction of the tire 2. Therefore, it is preferable from the viewpoint of improving the efficiency of the correction process that the necessity / unnecessity of pressing by the pressing rod 41 and the adjustment of the pressing force are simply performed during the correction process.

  Therefore, the hydraulic cylinder 61 can be controlled by the hydraulic control device to move the pressing rod 41 in the radial direction during the correction process. As a result, during the correction process, for the small block 25 that does not fall down, the position adjustment for retracting the pressing rod 41 from the small block 25 is performed, and the pressing by the pressing rod 41 is released. Further, during the correction process, the pressing force is adjusted by adjusting the position of the pressing rod 41 in the radial direction according to the degree of the small block 25 falling. More specifically, the position of the pressing rod 41 is adjusted so that the pressing force decreases as the small block 25 is tilted, and the frictional force decreases accordingly.

According to the second embodiment, the same operations and effects as the first embodiment are exhibited, and the following operations and effects are exhibited. That is, the position adjustment of the pressing rod with respect to the tire 2 is automatically performed by the hydraulic cylinder 61, whereby the position adjustment of the pressing rod 41 is facilitated, and the working efficiency for the correction process is improved. In addition, by adjusting the position of the pressing rod 41 that enables adjustment of the pressing force on the small block 25 and pressing and releasing of the pressure during the correction process, the small block 25 is appropriately corrected, and the tire 2 as a whole. The small block 25 can be quickly brought close to the normal state, and the efficiency of the correction process is improved.

Hereinafter, an embodiment in which a part of the configuration of the above-described embodiment is changed will be described with respect to the changed configuration.
The pressing rod 41 may be configured by a cylindrical member (pipe-shaped member) or a solid member having an arbitrary cross-sectional shape such as a circle or a square, and the pressing member may be configured by a brush.
The cooling device B may be a device that injects cooling water to the outer peripheral side of the tire 2.
During the correction process, in order to move the tire 2 relative to the pressing member, the tire 2 is fixed and the pressing member is moved along the tread portion 21 in the circumferential direction. Any relative form of movement between the tire 2 and the pressing member is possible, such as moving the wheel.
The vulcanizing apparatus may be a mold other than the sector mold mold, and the green tire may not have a laminated structure of long materials.
The liquid tank in which the lubricating liquid is stored may be provided regardless of the PCI device.

BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic which shows a part of the correction apparatus which is 1st Embodiment of this invention in a cross section, (A) shows the state in the middle of setting the tire after a vulcanization molding to a correction apparatus, (B ) Indicates a state in which the tire is set in the correction device. It is a principal part side view in the II-II arrow view of FIG. (A) is a schematic plan view of a tire, and (B) is a cross-sectional view of a block having a small block in a collapsed state. It is a figure explaining the correction process of the fall by the correction apparatus of FIG. 1, (A) shows the state in which the first small block is pressed by the pressing rod in a block, (B) is the first small block in a block. The state where the small block adjacent to the block is pressed by the pressing rod is shown, and (C) shows the state where the correction by the pressing rod of all the small blocks is completed in the block. It is the schematic which shows one part of the correction apparatus which is a reference example in a cross section. It is the schematic which shows the press rod of the correction apparatus which is 2nd Embodiment of this invention in a cross section, and is a figure corresponding to FIG. It is a conceptual diagram explaining the fall of the small block which generate | occur | produces by die-cutting, (A) is principal part sectional drawing in the plane orthogonal to a tire's axial line in the state which isolate | separated some molds from the tire. (B) is the principal part enlarged view of (A).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,5 ... Correction apparatus, 2 ... Tire, 10 ... PCI apparatus, 11a, 11b ... Rim, 12 ... Drive mechanism, 13a ... Drive shaft, 13b ... Driven shaft, 14 ... Electric motor, 15 ... Hydraulic cylinder, 16a, 16b ... Connecting part, 17a, 17b ... Bearing, 18 ... Pressurized fluid supply device, 21 ... Tread part, 22a, 22b ... Groove, 23 ... Block, 24 ... Sipe, 25 ... Small block, 27 ... Bead part, 28 ... Side Wall part, 31 ... cooling water, 32 ... liquid tank, 35 ... pressurized fluid supply device, 36 ... valve, 37 ... introducing pipe, 40,60 ... pressing device, 41 ... pressing rod, 42 ... fixed base, 43 ... moving 44a, 44b ... support part, 45 ... slit, 51 ... molding drum, 52 ... drive mechanism, 61 ... hydraulic cylinder, 62 ... support rod,
A1, A2, A3 ... supporting device, B ... cooling device, C ... pressure adjusting device, E ... gripping member.

Claims (7)

A pressing member that presses a tire after vulcanization molding including a tread portion in which blocks divided into a plurality of small blocks are formed by a sipe formed by a mold of a vulcanizing device, inwardly in the radial direction. The pressure member is deformed by the frictional force between the pressing member and the small block to correct the collapse of the small block ,
A tire correction method , wherein a lubricating liquid is allowed to enter the sipe before the small block is pressed by the pressing member . Tire method of correction of claim 1, wherein the exerting internal pressure on the tire. The tire according to claim 1 or 2 , wherein the pressing member presses the small block during the post-cure inflation process of the tire, and the lubricating liquid is a cooling liquid used for the post-cure inflation process. How to fix. The tire of claims 1 to 3, characterized in that the green tire having a stacked structure long body made of unvulcanized rubber material are stacked is vulcanized in the vulcanizer The tire correction method according to claim 1. A first support device for supporting a vulcanized tire including a tread portion in which a block divided into a plurality of small blocks is formed by a sipe formed by a mold of a vulcanizer, and the small block in a radial direction A second support device that supports a pressing member that presses inward,
The first support device and the second support device cooperate to move the tire relative to the pressing member, so that the pressing member is caused by frictional force between the small block and the small block. Deform the small block to correct the fall of the small block ,
The first support device supports the tire in a state where a part of the tread portion is immersed in the lubricating liquid in the circumferential direction, and the pressing member is a liquid level of the lubricating liquid. A tire correcting device arranged below . A first support device for supporting a vulcanized tire including a tread portion in which a block divided into a plurality of small blocks is formed by a sipe formed by a mold of a vulcanizer, and the small block in a radial direction A second support device that supports a pressing member that presses inward,
The first support device and the second support device cooperate to move the tire relative to the pressing member, so that the pressing member is caused by frictional force between the small block and the small block. Deform the small block to correct the fall of the small block ,
The first support device supports the tire in a state where a part of the tread portion is immersed in the lubricating liquid in the circumferential direction, and the pressing member is a liquid level of the lubricating liquid. A tire correcting device, wherein the tire correcting device is arranged on the top . The correction device according to claim 5 or 6 , wherein, during the correction process, the first support device rotates the tire around an axis, and the second support device supports the pressing member so as to be movable in a radial direction. Tire correction device.

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