JP2010208198A - Method and apparatus for manufacturing tire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make pressure bonding quick and reliable while improving accuracy in pressure-bonding a belt-tread band to a green case. <P>SOLUTION: In a method for manufacturing a tire, a pressure bonding bladder 52 continuously extending in a circumferential direction is locked to grip segments 38 gripping the belt-tread band 24. The less amount of expansion of the pressure bonding bladder 52 when pressure-bonding the belt-tread band 24 to the green case is thereby required, and the belt-tread band 24 can be sufficiently pressure-bonded to the green case while supplying/exhausting gas quickly. Moreover, creases are hardly formed on the inner periphery of the pressure bonding bladder 52 when pressure bonding, and accuracy in pressure-bonding the belt-tread band 24 to the green case can also be improved. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

    The present invention relates to a manufacturing method and a manufacturing apparatus for a tire to be mounted on a vehicle, a construction machine or the like.

    As a conventional tire manufacturing method and manufacturing apparatus, for example, those described in Patent Document 1 below are known.

JP 58-31737 A

  This has a forming drum that holds a carcass whose center in the width direction bulges and deforms radially outward from the inside in the radial direction, and a ring body, and is capable of approaching and separating from the forming drum. A plurality of transfer rings that can be positioned in a surrounding position surrounded by the ring body from the outside in the radial direction, and a presser plate that is supported by the ring body in the circumferential direction and that has a ring shape as a whole at the radially inner end. And by moving the connection pin radially inward, an annular member including the tread can be gripped from the radial outside by a holding plate of these connection pins, and a moving mechanism including a spring and a rubber bellows, It extends continuously in the circumferential direction on both sides of the presser plate, is locked to the ring body, and expands and contracts by supplying and discharging gas inside. It is obtained by a pair of inflatable bellows as possible.

  In this case, the connecting pin is moved radially inward by the spring and the annular member is gripped from the radially outer side by the pressing plate, and then the transfer ring is brought close to the forming drum, and the center portion in the width direction of the carcass is moved. By bulging and deforming outward in the radial direction and bringing it into contact with the presser plate, the transfer ring and ring body are positioned at the enclosed position, and then the gas is supplied to the inside of the expansion bellows to inflate it to the presser plate. Both sides in the width direction of the gripped annular member are pushed inward in the radial direction so that the annular member is crimped to the outer side in the radial direction of the carcass.

    However, in such a conventional tire manufacturing method and manufacturing apparatus, since the expansion bellows is locked to the ring body positioned radially outward from the presser plate, the annular member is positioned radially outward of the carcass. When crimping, it is necessary to expand the expansion bellows greatly. However, if the expansion amount (expansion amount in the radial direction) is not sufficient, there will be places where the above-described pressure bonding is insufficient, and gas supply to the expansion bellows will occur. There is a problem that a long time is required for drainage and work efficiency is reduced.

  In addition, since the expansion bellows described above has a large inner diameter due to large expansion, wrinkles are generated on the inner periphery of the expansion bellows due to the difference in the circumferential direction between the inner and outer circumferences. In such a case, the position where the annular member is crimped to the carcass is shifted, so that the accuracy of crimping is lowered, and the uniformity of the tire is also lowered.

  An object of the present invention is to provide a tire manufacturing method and a manufacturing apparatus that can quickly and surely press-fit a ring member while improving the accuracy of pressure-bonding an annular member to a tire intermediate body.

    The purpose of this is to firstly move a plurality of gripping bodies supported in a circumferential direction by an annular ring body provided on a support base to the inside in the radial direction by a moving mechanism. A first step of gripping an annular member including a tread from the radially outer side by a gripping segment provided at an inner end in the radial direction and having an annular shape as a whole; holding means for holding a tire intermediate from the radially inner side; and the support base And a second step of positioning the support base in a surrounding position in which the ring body surrounds the tire intermediate body in which the central portion in the width direction bulges and deforms radially outward from the radially outer side, and continues in the circumferential direction. The annular member is pressed radially inward by supplying gas to the inside of the inflatable / shrinkable crimped bladder locked to the gripping segment at a plurality of locations separated in the circumferential direction. The annular member by a third step in the method of manufacturing the tire provided with which is adapted to crimp radially outward of the tire intermediates can be achieved Te.

  Secondly, it has a holding means for holding the tire intermediate body whose center in the width direction is bulging and deforming radially outward from the inside in the radial direction, and an annular ring body, and is relatively close to and away from the holding means. And a support base that can be positioned in a surrounding position surrounding the bulged and deformed tire intermediate body by a ring body from the outside in the radial direction, and is supported by the ring body in the circumferential direction, and at the radially inner end as a whole. A plurality of gripping bodies each provided with an annular gripping segment and moving the gripping body radially inward can grip the annular member including the tread from the radially outer side by the gripping segments of these gripping bodies. A movable mechanism that extends continuously in the circumferential direction, and is locked to the gripping segment at a plurality of locations separated in the circumferential direction, and expands and contracts by supplying and discharging gas inside. A crimping bladder that can move the gripping body radially inward by a moving mechanism to grip the annular member by the gripping segment, and then relatively close the support base and the holding means to surround the support base. And then expanding the pressure bladder by supplying gas to the inside of the crimping bladder to press the annular member radially inward to crimp the annular member radially outward of the tire intermediate. This can be achieved with the device.

  In this invention, the crimping bladder that extends continuously in the circumferential direction is locked to the gripping segment that grips the annular member, so that the position of the crimping bladder is closer to the tire intermediate than in the prior art. As a result, the expansion amount (expansion amount in the radial direction) when the pressure bonding bladder is inflated to crimp the annular member to the tire intermediate body can be reduced, and the annular member can be sufficiently crimped to the tire intermediate body. As a result, the work efficiency can be improved. In addition, since the expansion amount is small as described above, there is almost no wrinkle generated on the inner periphery of the crimping bladder. As a result, the accuracy of crimping the annular member to the tire intermediate can be improved, and the tire uniformity can be improved. It can also be improved.

  Moreover, if comprised as described in Claim 3, the escape to the horizontal direction (width direction outer side) at the time of expansion | swelling of a crimping | compression-bonding bladder will decrease, and the crimping | compression-bonding to the tire intermediate body of an annular member will be made stronger. be able to. Furthermore, if comprised as described in Claim 4, the whole annular member can be crimped | bonded to a tire intermediate body easily and reliably. According to the fifth aspect of the present invention, the time for contracting the crimping bladder can be shortened, and the crimping bladder can be easily crushed until it becomes flat. Furthermore, if comprised as described in Claim 6, the time for expanding and contracting the crimping bladder can be further shortened.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic front view with a part broken away showing Embodiment 1 of the present invention. It is a side view of the support stand vicinity. FIG. 3 is a cross-sectional view taken along arrows II in FIG. 2 immediately before gripping the annular body. It is sectional drawing similar to FIG. 3 explaining the state at the time of crimping | compression-bonding. It is sectional drawing similar to FIG. 4 which shows Embodiment 2 of this invention.

Embodiment 1 of the present invention will be described below with reference to the drawings.
In FIGS. 1, 2, and 3, reference numeral 11 denotes a first molding machine installed on the floor surface 10, and this first molding machine 11 includes a drive unit 12 and a drive unit 12 extending rearward from the drive unit 12. It comprises a first forming drum 13 as horizontal holding means that rotates by receiving a driving force from the section 12. The first forming drum 13 has a pair of bead lock bodies 14 separated in the axial direction, and these bead lock bodies 14 can be expanded and contracted by receiving a driving force from the drive unit 12 and are along the axis. And can move the same distance in the opposite direction.

  When a cylindrical green case 16 as a tire intermediate body made of an inner liner, a bead core, a carcass or the like is carried into the first forming drum 13 and is externally fitted, the bead lock body of the first forming drum 13 14 expands to hold the beads of the green case 16 from the inside in the radial direction. Thereafter, when the bead lock body 14 moves in the axial direction and approaches each other, and when air is supplied into the green case 16, the green case 16 is first molded as indicated by a virtual line in FIG. While being held by the drum 13 from the inside in the radial direction, the central portion in the width direction (axial direction) bulges and deforms outward in the radial direction and has a substantially arc-shaped cross section.

  Here, the cylindrical green case 16 is, for example, an inner liner, a carcass, etc., which are successively attached around a molding drum (not shown), and then outside the both ends of the carcass in the axial direction (axial direction). It can be configured by setting a bead core and then folding back the carcass on both axial sides outside the bead core inward in the axial direction. The folding of the carcass positioned on both outer sides in the axial direction from the bead core described above is performed when the green case 16 is held by the first forming drum 13 and then the green case 16 is bulged and deformed. Alternatively, the bladder provided in 13 may be inflated.

  A second molding machine 19 is installed on the floor surface 10 behind the first molding machine 11. The second molding machine 19 has a drive unit 20 and a cylindrical shape extending forward from the drive unit 20. The second molding drum 21 is configured coaxially with the first molding drum 13, rotated by receiving a driving force from the driving unit 20, and can be expanded and contracted. Then, when a belt-like belt 22 and a tread 23 are supplied around the rotating second forming drum 21 and attached one after another, a belt as an annular member including the tread 23 is provided around the second forming drum 21. -The tread band 24 is formed.

  Reference numeral 27 denotes a pair of guide rails laid on the floor surface 10 and extending in the front-rear direction. These guide rails 27 extend from directly below the first forming drum 13 to directly below the second forming drum 21. 28 is a conveying means that can convey the belt tread band 24 while gripping it from the outside, and this conveying means 28 is provided with a plurality of slide bearings 29 that are slidably engaged with the guide rail 27. A support plate 30 is provided. An annular ring body 31 coaxial with the first and second molding drums 13 and 21 is fixed to the support plate 30 via a connecting member 32, and a plurality of guides 33 are provided on the front side surface of the ring body 31. They are mounted equidistantly in the circumferential direction.

  The support plate 30, ring body 31, connecting member 32, and guide 33 described above constitute a support base 35 having an annular ring body 31 as a whole. Here, the support base 35 (conveying means 28) receives a driving force from a driving mechanism (not shown), for example, a motor-driven chain, cylinder, or rack and pinion mechanism, and moves in the front-rear direction while being guided by the guide rail 27. The first and second molding drums 13 and 21 that are stationary can be moved closer to and away from each other.

  The support base 35 is moved forward by receiving a driving force from the drive mechanism, thereby causing the green case 16 in which the ring body 31 is bulged and deformed from the outside in the radial direction, as indicated by a virtual line in FIG. It can be located in a surrounding enclosure position R. In this embodiment, as described above, the first and second molding drums 13 and 21 are allowed to stand, while the support base 35 is moved closer to and away from the first and second molding drums 13 and 21. However, in the present invention, while the support base 35 is left stationary, the first and second forming drums 13 and 21 may be moved closer to and away from the support base 35. It is only necessary that the first and second forming drums 13 and 21 are relatively close to each other.

  37 is a plurality of grip bodies (the same number as the guides 33) arranged at equal distances in the circumferential direction. These grip bodies 37 extend in the radial direction and can slide on the guides 33 of the ring body 31, respectively. It is supported. An arc-shaped gripping segment 38 having the same radius of curvature is provided at the radially inner ends of the gripping bodies 37. As a result, the gripping segments 38 have an annular shape intermittently interrupted as a whole.

  L-shaped swing arms 40 are respectively installed between the gripping bodies 37 adjacent to each other on the front side surface of the ring body 31, and the bent portions of the swing arms 40 can be rotated to the ring body 31 via pins 41. It is connected to. Further, one end portions of the adjacent swing arms 40 are connected to each other by the connection link 42. As a result, the swing arms 40 can swing in the same direction in synchronization with the connection link 42. Reference numeral 43 denotes a long hole formed at the other end of each swing arm 40, and a roller 44 rotatably supported by each gripping body 37 is inserted into the long hole 43.

  46 is one bracket fixed to the outer periphery of the ring body 31, and the head side of the cylinder 47 is connected to the bracket 46. One end of one of the swing arms 40 is connected to the tip of the piston rod 48 of the cylinder 47. As a result, when the cylinder 47 is operated and the piston rod 48 protrudes or retracts, the swing arm 40 40 swings synchronously, whereby the gripping body 37 and gripping segment 38 move in the radial direction synchronously. The swing arm 40, the pin 41, the connecting link 42, the roller 44, the bracket 46, and the cylinder 47 described above constitute a moving mechanism 49 that moves the gripping body 37 and the gripping segment 38 synchronously in the radial direction.

  Then, as shown in FIG. 3, when the support base 35 is positioned at the surrounding position Q that surrounds the second forming drum 21 from the outside in the radial direction, the moving mechanism 49 is activated to hold the gripping body 37, as shown in FIG. When the grip segments 38 are synchronously moved inward in the radial direction, the grip segments 38 of the grip bodies 37 can grip the belt tread band 24 formed on the second forming drum 21 from the radially outer side. In the present invention, a plurality of hydraulic cylinders extending in the radial direction are used as the moving mechanism, or instead of the swing arm 40 and the connecting link 42, the roller 44 is rotatably supported by the ring body 31. May be used, and a rotating ring provided with inclined slits inclined in the same direction with respect to the radial direction may be used.

  Here, if a gripping body 37 and a gripping segment 38 that can stop at any position in the radial direction are used as a moving mechanism, a tire in which the outer diameter of the belt tread band 24 is manufactured, here, pneumatic Even if it changes depending on the type of tire, it can be gripped by following the change in the outer diameter of the belt tread band 24 easily.

  52 is an annular crimping bladder that extends continuously in the circumferential direction, and the entire crimping bladder 52 is made of vulcanized rubber. In the present invention, a plurality of reinforcing cords may be embedded in the crimping bladder 52 to improve the strength of the crimping bladder 52. The crimping bladder 52 is locked to the inner peripheral surface of each gripping segment 38 by an adhesive or the like at a plurality of (same number as the gripping segments 38) at equal distances in the circumferential direction.

  54 is a connection passage for connecting the gas chamber 55 and the switching valve 56 formed inside the crimping bladder 52. The switching valve 56 is connected to the inside of the crimping bladder 52 (gas chamber 55), for example, air or the like. A source 57 for supplying the gas and a vacuum source 58 for sucking and discharging the gas from the inside (gas chamber 55) of the crimping bladder 52 are connected. As a result, the crimping bladder 52 can expand and contract by supplying and discharging gas from the supply source 57 and the vacuum source 58 to the inside (gas chamber 55).

  When the belt tread band 24 formed on the outside of the second forming drum 21 is gripped from the outside by the gripping segment 38, gas is sucked and discharged from the inside of the crimping bladder 52 by the vacuum source 58. The gripping segment 38 is synchronously moved radially inward by the moving mechanism 49 so that the belt tread band 24 is moved from the outside with the contracted crimping bladder 52 interposed therebetween. Hold it.

  If the crimping bladder 52 is locked to the inner peripheral surface of the gripping segment 38 as described above, and the belt tread band 24 is gripped by the gripping segment 38 with the crimping bladder 52 interposed therebetween, Thus, when the crimping bladder 52 is expanded and the belt tread band 24 is crimped to the green case 16, the lateral displacement (outward in the width direction) of the crimping bladder 52 is reduced. The crimping of the band 24 to the green case 16 can be made stronger.

  On the other hand, when the belt-tread band 24 gripped from the outside by the gripping segment 38 with the contracted crimping bladder 52 interposed therebetween is crimped to the green case 16, the switching valve 56 is switched to the gas chamber 55. A supply source 57 is connected, thereby supplying gas into the crimping bladder 52 to expand the crimping bladder 52 radially inward. As a result, the belt tread band 24 is pressed radially inward, and is crimped to the radially outer side of the green case 16 whose central portion in the width direction bulges and deforms radially outward.

  At this time, since the crimping bladder 52 continuously extending in the circumferential direction is locked to the gripping segment 38 as described above, the placement position of the crimping bladder 52 is closer to the green case 16 than before, and as a result, The expansion amount (radial expansion amount) when the crimping bladder 52 is expanded to crimp the belt tread band 24 to the green case 16 is small, and the belt tread band 24 is sufficiently crimped to the green case 16. In addition, gas can be quickly supplied to and discharged from the crimping bladder 52, and work efficiency is improved. Moreover, since the amount of expansion is small as described above, there is almost no wrinkle on the inner periphery of the crimping bladder 52 during crimping, and as a result, the crimping accuracy of the belt tread band 24 to the green case 16 can be improved. It is also possible to improve tire uniformity.

  In this embodiment, when the crimping bladder 52 is contracted, the inside of the crimping bladder 52 (gas chamber 55) is connected to the vacuum source 58 so that the gas inside the crimping bladder 52 is sucked by the vacuum source 58. Therefore, the time for contracting the crimping bladder 52 can be shortened, the work efficiency can be easily improved, and the crimping bladder 52 can be easily crushed until it becomes flat. Interference between the crimping bladder 52, the second forming drum 21, and the belt tread band 24 during movement can be easily prevented. Furthermore, in this embodiment, the width of the gripping segment 38 and the crimping bladder 52 when contracted is equal to or greater than the width of the belt tread band 24 as shown in FIG. As a result, the entire belt tread band 24 can be pressure-bonded to the green case 16 easily and reliably.

  In the above-described embodiment, the crimping bladder 52 is locked to the inner peripheral surface of the gripping segment 38. However, in the present invention, the gripping segment is made narrower than the gripping segment 38 of the first embodiment. The crimping bladders 52 may be locked to both side surfaces in the width direction of the narrow gripping segment. In this case, it is only necessary to attach a restricting plate extending outward in the width direction on the radially outer side surface of the gripping segment and restrict the crimping bladder 52 from bulging outward in the radial direction by the restricting plate.

Next, the operation of the first embodiment will be described.
When manufacturing a tire, here a pneumatic tire, using the manufacturing apparatus described above, a cylindrical green case 16 formed by a molding drum (not shown) is used as the first molding drum 13 of the first molding machine 11. After carrying-in and external fitting, the bead lock body 14 is expanded in diameter to hold the beads of the green case 16 from the inside in the radial direction. On the other hand, in the second molding machine 19, a belt 22 and a tread 23 are successively supplied and pasted around the rotating second molding drum 21, and the belt including the tread 23 around the second molding drum 21. The tread band 24 is formed.

  Next, the driving mechanism is operated to move the conveying means 28 (support base 35) from the standby position between the first molding machine 11 and the second molding machine 19 toward the rear, and the ring body 31 moves the second molding drum 21. It is moved from the outside in the radial direction to the surrounding position Q, and the center in the width direction of the crimping bladder 52 and the center in the width direction of the belt tread band 24 are matched. At this time, gas is sucked and discharged from the inside of the crimping bladder 52 by the vacuum source 58, and the crimping bladder 52 is contracted until it becomes flat. Next, the cylinder 47 of the moving mechanism 49 is operated to cause the piston rod 48 to protrude, and the swing arm 40 is synchronously swung clockwise in FIG.

  As a result, the plurality of gripping bodies 37, the gripping segments 38, and the crimping bladders 52 are synchronously moved radially inward by the moving mechanism 49, and the gripping segments 38 of these gripping bodies 37 are interposed with the contracted crimping bladders 52 therebetween. The belt tread band 24 on the second forming drum 21 is gripped from the outside in the radial direction. At this time, the circumferential interval between the adjacent gripping segments 38 is gradually narrowed by the movement of the gripping segments 38 inward in the radial direction. Next, the diameter of the second forming drum 21 is reduced in a state where the movement of the gripping segment 38 in the radial direction is restricted, and the belt tread band 24 is transferred from the second forming drum 21 to the gripping segment 38 of the conveying means 28.

  Next, the drive mechanism is operated, and the conveying means 28 (support 35) holding the belt tread band 24 is moved forward so as to approach the first forming drum 13, and the width direction of the belt tread band 24 is reached. (Axial direction) The center and the green case 16 are moved to a position where the width direction (axial direction) center matches. Next, the bead lock body 14 is moved so as to approach each other in the axial direction, and air is supplied into the green case 16. As a result, while the green case 16 is held by the first molding drum 13 from the inside in the radial direction, the central portion in the width direction bulges and deforms outward in the radial direction, and has a substantially arc-shaped cross section. As a result, the support base 35 is positioned at a surrounding position R that surrounds the green case 16 in which the ring body 31 is bulged and deformed from the outside in the radial direction.

  Here, the bulging deformation of the green case 16 described above is performed until the green case 16 comes into close contact with the inner peripheral surface of the belt 22, and as a result, the position of the green case 16 and the belt tread band 24 in the axial direction is increased. The alignment is performed with high accuracy, and air is pushed out from the width direction outside, and the remaining of the air is effectively suppressed. Next, in a state where the movement of the gripping segment 38 in the radial direction is restricted, the switching valve 56 is switched to connect the gas chamber 55 and the supply source 57, thereby supplying the supply source to the inside of the crimping bladder 52 (gas chamber 55). Gas is supplied from 57 through the connecting passage 54, and the crimping bladder 52 is expanded radially inward.

  As a result, the belt tread band 24 where the gap exists with the green case 16 is pushed inward in the radial direction by the crimping bladder 52 and deforms until it is in close contact with the green case 16. Here, the adhesion of the belt tread band 24 described above gradually progresses from the center in the width direction toward both ends in the width direction, so that air gradually moves from the belt tread band 24 and the green case 16 outward in the width direction. Extrusion is performed, and the residual air is effectively suppressed. When the entire belt tread band 24 comes into close contact with the green case 16 due to the expansion of the crimping bladder 52 in this way, the belt tread band 24 is pressed radially inward by the internal pressure of the crimping bladder 52 and radially outward of the green case 16. Crimped uniformly.

  Thereafter, the switching valve 56 is switched to connect the gas chamber 55 and the vacuum source 58, and the gas is sucked and discharged from the inside of the crimping bladder 52 to contract the crimping bladder 52 until it becomes flat, and the piston rod of the cylinder 47 48 is retracted, and the gripping body 37, the gripping segment 38, and the crimping bladder 52 are synchronously moved outward in the radial direction, and the gripping segment 38 and the crimping bladder 52 are separated from the green case 16 and the belt tread band 24. In the present invention, before the gas is discharged from the inside of the crimping bladder 52, the gripping segment 38 is synchronously moved radially outward by the moving mechanism 49 so that the gripping segment 38 and the expanding crimping bladder 52 are moved to the green case. 16. Separated from the belt tread band 24, the gas may then be discharged from the crimping bladder 52. Next, the transport mechanism 28 is moved rearward by the drive mechanism and returned to the standby position.

  Thus, in this embodiment, since the crimping bladder 52 is locked to the gripping segment 38, the amount of expansion of the crimping bladder 52 when the belt tread band 24 is crimped to the green case 16 can be reduced. The belt tread band 24 can be sufficiently pressed against the green case 16 and gas can be quickly supplied and discharged. In addition, there is almost no wrinkle on the inner periphery of the crimping bladder 52 during crimping, and the crimping accuracy of the belt tread band 24 to the green case 16 can be improved.

  As described above, when the belt tread band 24 is crimped to the outside of the green case 16 in the radial direction, a green tire is formed. The green tire thus formed is not shown in the drawing. After being taken out from the first molding machine 11 by the conveying means, it is housed in a vulcanization mold of a vulcanizer (not shown) and vulcanized under high temperature and high pressure to become a pneumatic tire (vulcanized tire). .

    FIG. 5 is a diagram showing Embodiment 2 of the present invention. In this embodiment, two crimping bladders 61 and 62 extending continuously in the circumferential direction are provided, and these crimping bladders 61 and 62 are arranged in parallel in the width direction on the inner circumferential surface of the gripping segment 38. In this way, the gas chamber volume of the crimping bladder is divided into two, and the time for expanding and contracting these crimping bladders 61 and 62 can be shortened. Other configurations and operations are the same as those of the first embodiment.

    In the above-described embodiment, the green case 16 is used as the tire intermediate, and the belt tread band 24 is used as the annular member. However, in the present invention, the center portion in the width direction swells radially outward as the tire intermediate. A cross-section toroidal pedestal tire from which the tread is removed from a used tire that has been deformed is a tread made of unvulcanized rubber or vulcanized rubber as an annular member. You may make it pressure-bond using. Thereafter, vulcanization is performed as necessary. The tire manufactured in this way is a retreaded tire.

  At this time, the above-described base tire may be held from the inside in the radial direction by a holding rim as a holding means. Further, when the tread is crimped to the base tire as described above, the gripping body and gripping segment are moved slightly inward in the radial direction by the moving mechanism prior to the expansion of the crimping bladder, or simultaneously with the expansion, and the base tire and the tread. It is also possible to reduce the expansion amount of the crimping bladder and to ensure the crimping by narrowing the interval between the two.

  The present invention can be applied to the industrial field of tires mounted on vehicles, construction machines and the like.

13 ... Holding means 16 ... Tire intermediate
23… Tread 24… Annular member
31 ... Ring body 35 ... Support base
37… Grip body 38… Grip segment
49 ... Movement mechanism 52 ... Pressure bonding bladder
58 ... Vacuum source R ... Enclosed position

Claims (6)

    A plurality of gripping bodies supported in a circumferential direction by an annular ring body provided on a support base are moved radially inward by a moving mechanism, thereby being provided at an inner end in a radial direction of the gripping body as a whole. The gripping segment exhibiting the first position for gripping the annular member including the tread from the radially outer side, the holding means for holding the tire intermediate body from the radially inner side, and the support base relatively approach each other, and A second step of positioning the support base in a surrounding position in which the ring body surrounds the tire intermediate body in which the portion bulges outward in the radial direction from the radial direction outer side, and a plurality of portions that extend continuously in the circumferential direction and are separated in the circumferential direction A gas is supplied to the inside of the inflatable / shrinkable crimped bladder locked to the gripping segment at a location to inflate, thereby pressing the annular member radially inward to place the annular member in the middle of the tire The third step in the method of manufacturing the tire characterized by having a you be crimped radially outwardly of.     A holding means for holding the tire intermediate body, whose central portion in the width direction bulges outward in the radial direction, from the inside in the radial direction, and an annular ring body, and is relatively close to and away from the holding means. A support base that can be positioned in a surrounding position that surrounds the tire intermediate body that has been deformed from the outside in the radial direction by the ring body, and a grip that is supported by the ring body in the circumferential direction and that has a ring shape as a whole at the radially inner end A plurality of gripping bodies each provided with segments, and a moving mechanism capable of gripping the annular member including the tread from the radially outer side by the gripping segments of the gripping bodies by moving the gripping bodies radially inward; In addition to extending continuously in the circumferential direction, it is locked to the gripping segment at a plurality of locations separated in the circumferential direction, and can be expanded and contracted by supplying and discharging gas inside. The gripping body is moved inward in the radial direction by the moving mechanism and the annular member is gripped by the gripping segment, and the support base and the holding means are relatively approached to position the support base in the enclosed position. Then, by supplying gas into the crimping bladder and expanding it, the annular member is pressed radially inward to crimp the annular member radially outward of the tire intermediate body. Tire manufacturing equipment.     The tire manufacturing apparatus according to claim 2, wherein the crimping bladder is locked to the inner peripheral surface of the gripping segment, and the annular member is gripped by the gripping segment with the crimping bladder interposed therebetween.     The tire manufacturing apparatus according to claim 2 or 3, wherein a width of the gripping segment and the crimping bladder during contraction is equal to or greater than a width of the annular member.     The tire manufacturing apparatus according to any one of claims 2 to 4, wherein when the crimping bladder is contracted, the inside of the crimping bladder is connected to a vacuum source to suck the gas inside the crimping bladder.     The tire manufacturing apparatus according to claim 3, wherein two crimping bladders are provided, and the crimping bladders are arranged in parallel in the width direction on the inner peripheral surface of the gripping segment.

Images