JP6203674B2 - Folding device for tire components - Google Patents

Description

The present invention, the folded portion of the tire components situated axially outside the bead core, to fold and equipment for tire components folded along the body portion that bulges radially deformed outwardly.

The fold and equipment of conventional tire components are known those as described for example in Patent Document 1 below.

JP 2011-084003 A

    This is installed on both outer sides of the pair of bead cores in the axial direction, and is disposed in the axial direction of the tire constituent member, and is disposed apart from the bead core in the circumferential direction, and is located on the slider. A plurality of folded arms connected so as to be able to swing in the radial direction around the part, and an elastic ring that is fitted to the outside of the folded arm and that constantly applies an elastic force inward in the radial direction to all the folded arms, By moving the slider synchronously inward in the axial direction, the tip of the folded arm is brought into contact with the folded portion located on both outer sides in the axial direction from the bead core, and the folded arm is opposed to the elastic force of the elastic ring in the radial direction. Air cylinder type drive that swings outward and folds back along the body part that bulges and deforms radially outward between the bead cores And a stopper that is placed on the outer side in the axial direction from each slider and can contact the proximal end of the folding arm, and the tire component, the folding arm, and the drive mechanism are integrated around the central axis of the tire component. When rotating, when the folding arm swinging to the radially inner limit is moved radially outward, the elastic force by the elastic ring and the base end of the folding arm are brought into contact with the stopper It is regulated by the contact force.

    However, in such a conventional tire component member folding device, the contact force when the base end portion of the folding arm is brought into contact with the stopper by the air pressure supplied to the air cylinder type drive mechanism, and The elastic force of the elastic ring regulates the swinging of the folding arms outward in the radial direction. When the tire component member, the folding arms, etc. rotate, the folding arms swing toward the radial outside. The moment of the force to be applied is large because the mass (weight) of the folding arm is large and the length of the arm of the moment is long, so that the folding arm is brought into contact with the stopper even though it is considerably large. The moment of the radially inward force applied to the arm is considerably short, so that the swinging of the folded arm to the radially outer side is sufficiently restricted. There is a problem that can not be.

This invention aims to provide a fold and equipment for tire components, tire components can be effectively regulated to swing radially outward of該折-back arm during rotation of the folding arm.

Such a purpose is a tire that folds back along the main body part of the tire constituent member that has a main body part that bulges and deforms radially outward between a pair of bead cores and that is located on both outer sides in the axial direction from the bead core. A component folding device, which is installed on both outer sides in the axial direction of the bead core, is arranged apart from the circumferential direction, and is capable of swinging in a radial direction around a base end portion separated from the bead core. A folding arm, an elastic ring that is fitted to the outside of the folding arm and that constantly applies an elastic force toward the inside in the radial direction to all the folding arms, and a base end portion of the folding arm is synchronously moved inward in the axial direction. The folding arm is swung radially outward against the elastic force of the elastic ring while the tip of the folding arm is in contact with the folding portion, Moving means that folds the part along the main body, and is provided in the moving means at a position facing the radially inner side surface of the folded arm or the radially inner side surface of the folded arm swung to the inner limit in the radial direction. A suction body made of a magnet is installed on one of the cylindrical surfaces formed, while a suctioned part to be sucked by the suction body is installed on the other inner surface of the radial direction or the other cylindrical surface, and the folding arm is in the radial direction. While swinging to the inner limit, the suctioned portion is sucked by the suction body, thereby restricting the swinging arm from swinging radially outward and at least facing the suctioned portion of the suction body. the surface was covered with a metal cover, further, the folding device of the tire component member disposed suction body or the suction unit is installed in the folding arm to the distal end of the該折-back arms, reach It can be.

In this invention, the magnet is provided on either the radially inner side surface of the folded arm or the cylindrical surface provided on the moving means at a position facing the radially inner side surface of the folded arm swung to the inner limit in the radial direction. While installing the suction body consisting of, when the suctioned portion to be suctioned by the suction body is installed on the other side of the radially inner side surface or the cylindrical surface, and the folding arm swings to the radially inner limit, Since the portion to be attracted is attracted by the magnetic force of the attracting body, the distance between the attracting body and the swing center located at the proximal end of the folding arm, that is, the length of the arm of the moment of force is set. As a result, even if the mass (weight) of each folding arm is large, the swinging of the folding arm to the outside in the radial direction during rotation of the tire component and the folding arm is effectively restricted. Rukoto can. At this time, an elastic force from the elastic ring toward the inside in the radial direction is also applied to the folding arm. Further, when the folding arm swings from the radially inner limit toward the radially outer side, in addition to an increase in the radial gap between the suction body and the sucked portion, the folding arm moves inward in the axial direction. a deviation in the axial direction of the suction body and the suction unit by the moving is increased, the suction force by the suction body is rapidly reduced, the suction unit is Ru can be smoothly detached from the suction member. Also, even when a situation such as a collision with the suction body and the suction unit when the swing radially inward limit of the folded arm occurs, effectively prevent damage to the relatively fragile suction body (magnet) is Ki de be in the et, the length of the moment arm of the previous mentioned with force and much longer, it is possible to greatly improve the swing restriction effect of the radially outer folding arm.

It is front sectional drawing when the folding arm which shows Embodiment 1 of this invention is a contracted state. It is front sectional drawing when a return | turnback arm is an expansion state. It is front sectional drawing of a suction body and a to-be-sucked part vicinity. It is a front sectional view of a suction body and a portion to be sucked showing a second embodiment of the present invention.

Embodiment 1 of the present invention will be described below with reference to the drawings.
1 and 2, 11 is a forming drum for forming a green tire for a pneumatic tire to be mounted on a passenger car, a bus, a truck, or the like. The forming drum 11 has a horizontal hollow main shaft 12, and this main shaft. 12 can be rotated around its axis by receiving a driving force from a driving unit (not shown). In the main shaft 12, a screw shaft 13 that is coaxial with the main shaft 12 and is driven and rotated separately from the main shaft 12 is loosely fitted. 14 is formed. Reference numeral 15 denotes a connecting block to which nuts 16 that are respectively screwed into the male threads 14 of the screw shaft 13 are fixed. The connecting block 15 passes through a plurality of slits 17 formed in the main shaft 12 and extending in the axial direction. Reference numeral 21 denotes a substantially cylindrical slider which is fitted to the outer sides of both sides in the axial direction of the main shaft 12 so as to be movable in the axial direction, and the connecting blocks 15 are connected to these sliders 21, respectively. As a result, when the screw shaft 13 rotates, these sliders 21 are moved in the axial direction by an equal distance in the reverse direction by the male screw 14 which is a reverse screw, and are moved closer to and away from each other. A plurality of radially extending guide grooves 22 are formed in the axially inner end portion of the slider 21 so as to be separated from each other in the circumferential direction, and a bead lock segment 23 is inserted in each guide groove 22 so as to be movable in the radial direction. Yes.

  27 is a cylinder chamber formed in the slider 21, and the cylinder chamber 27 is slidably accommodated in each cylinder chamber 27, and the cylinder chamber 27 includes an inner chamber 27 a positioned axially inside the piston 28. The outer chamber 27b is located outside the piston 28 in the axial direction. Inner ends of a plurality of links 29 (the same number as the bead lock segments 23) are connected to the extending portion 28a extending inward in the axial direction from the piston 28, and the outer ends of these links 29 are connected to the bead lock segments 23. Has been. When a high-pressure fluid such as oil or air is supplied from the high-pressure fluid source (not shown) to the inner chamber 27a, the piston 28 moves outward in the axial direction to move the bead lock segment 23 radially inward, On the other hand, when the high pressure fluid is supplied to the outer chamber 27b, the piston 28 moves inward in the axial direction to move the bead lock segment 23 outward in the radial direction.

  G is a tire intermediate body in the middle of molding a green tire, and this tire intermediate body G is a tire constituent member 34 made of, for example, a carcass layer in which a reinforcing cord is embedded (a side tread may be preset). And a pair of bead cores 36 having a ring shape to which a filler 35 is attached. And such a tire intermediate body G is shape | molded as follows, for example roughly. That is, after the cylindrical tire constituent member 34 is molded by a molding drum different from the molding drum 11, the bead core 36 with the filler 35 is set on the outer sides of both sides in the axial direction of the tire constituent member 34. The tire constituting member 34 and the bead core 36 with the filler 35 are carried in and fitted to the outside of the forming drum 11 by a conveying means (not shown) (see FIG. 1), and the bead lock segment 23 is synchronized radially outward as described above. The bead core 36 is gripped from the inside in the radial direction by being moved. At this time, the tire constituent member 34 is partitioned into a main body portion 34 a located between the bead cores 36 and a folded portion 34 b located on both outer sides in the axial direction from the bead core 36.

  Thereafter, while supplying a pressurized fluid (air, nitrogen gas, etc.) from a pressurized fluid source (not shown) into the main body 34a of the tire constituent member 34, the screw shaft 13 is rotated to slide the slider 21 and the bead lock segment 23. Are moved inward in the axial direction (toward the center in the axial direction) so as to approach each other, the main body portion 34a bulges radially outward between the pair of bead cores 36 so that the meridian cross section is substantially arc-shaped. Deform. At this time, the folded portions 34b on both outer sides in the axial direction from the bead core 36 remain in a cylindrical shape, but are then folded along the main body portion 34a as described later, and the tire intermediate G is formed. In this embodiment, a pair of bead cores 36 are arranged, but two or more pairs may be arranged, and these bead cores 36 only need to form a pair. In the present invention, the core body composed of a plurality of rigid segments arranged side by side in the circumferential direction is synchronously moved outward in the radial direction, or inside the bladder disposed radially inward of the main body portion 34a. The main body 34a may be expanded by supplying a pressurized fluid.

  Reference numeral 40 denotes a ring-shaped fixed piston formed on the outer periphery of the central portion in the axial direction of each slider 21. On the outside of the fixed piston 40, movable cylinders 41 each having a substantially cylindrical shape are connected to the tire intermediate G (tire component member 34). ) Is movably fitted in the central axis direction. Reference numeral 42 denotes a plurality of folding arms installed so as to surround each movable cylinder 41 from the outside in the radial direction. These folding arms 42 are arranged equidistantly in the circumferential direction and have their base ends (axial direction) The outer end portion) is connected to the outer end portion in the axial direction of the movable cylinder 41 via the bracket 43. As a result, the folded arms 42 are respectively installed on both outer sides in the axial direction of the bead core 36, and the filler Centering on the base end portion that is separated from 35, it is possible to swing in the radial direction within a plane including the central axis of the tire component member. These folding arms 42 extend in a substantially horizontal direction substantially parallel to the axis of the forming drum 11 when swung to the inner limit in the radial direction, and have a bracket at the tip (axially inner end). 44 is rotatably connected. Folding rollers 45 and 46 that rotate about an axis parallel to a tangent to the outer periphery of the bulged main body 34a are supported at both ends of each bracket 44 so as to be freely rotatable. In this way, the folding rollers 45 and 46 are installed at the tip of each folding arm 42.

  Reference numerals 48 and 49 denote elastic rings having at least one, and in this case, two rings made of endless rubber bands, springs, etc., fitted to the outside of all the folding arms 42. These elastic rings 48 and 49 are The folding arm 42 is locked away from the central portion in the longitudinal direction, and an elastic force (biasing force) directed radially inward is constantly applied to all the folding arms 42 so that the folding arms 42 are radially inward (reduction direction). Rock. Here, a cylindrical cylinder chamber 50 is formed between the slider 21 and the movable cylinder 41. These cylinder chambers 50 are located on the inner side in the axial direction of the fixed piston 40 by the fixed piston 40. The chamber 50a is partitioned into an outer chamber 50b positioned axially outside the fixed piston 40. When the high pressure fluid such as oil or air is supplied from the high pressure fluid source (not shown) to the outer chamber 50b and the movable cylinder 41 moves to the outer limit in the axial direction shown in FIG. Due to the elastic force of 49, it is reduced by swinging radially inward to the radially inner limit substantially parallel to the axis of the forming drum 11.

  Further, as described above, after the cylindrical tire constituent member 34 and the bead core 36 with the filler 35 are transported and fitted onto the molding drum 11, the bead lock segment 23 passes the bead core 36 in the radial direction via the tire constituent member 34. When gripping from the inside, the slider 21 moves so as to approach each other, and the main body portion 34a bulges outward in the radial direction. Thereafter, the folded arm 42 that has swung to the inner limit in the radial direction moves into the inner chamber 50a. When the high-pressure fluid is supplied and the movable cylinder 41 moves inward in the axial direction, the base end portion moves synchronously inward in the axial direction and expands outward in the radial direction while resisting the elastic force of the elastic rings 48 and 49. Rocks like this. At this time, the folding rollers 45 and 46 located on the inner side in the radial direction of the folded portion 34b move inward in the axial direction and radially outward while being in rolling contact with the folded portion 34b, and the folded portion 34b is moved to the main body portion 34a. And is folded back along the main body 34a.

  At this time, since the elastic rings 48 and 49 are stretched by swinging the folding arm 42 radially outward, the elastic force is applied to the folding arm 42 to swing the folding arm 42 radially inward. Thus, the folding rollers 45 and 46 are pressed against the folding portion 34b, and the folding portion 34b in the rolling path of the folding rollers 45 and 46 is pressed against the main body portion 34a and the filler 35. The slider 21, the movable cylinder 41, and the high-pressure fluid source having the fixed piston 40 described above as a whole move the base end of the folding arm 42 inward in the axial direction so that the distal end of the folding arm 42 becomes the folding portion 34b. While making contact, the moving arm 53 is configured to swing the folding arm 42 radially outward against the elastic force of the elastic rings 48 and 49, and to fold the folding part 34b along the main body part 34a. In the present invention, the base end portion of the folding arm 42 may be moved in the axial direction using a screw mechanism, a rack and pinion mechanism, or the like. Reference numerals 54 denote ring-shaped outer flanges integrally formed on the slider 21 between the guide groove 22 and the movable cylinder 41, respectively. Are integrally formed. The outer peripheries of the receivers 55 come into contact with the folding rollers 45 and 46 when the folding arm 42 swings to the inner limit in the radial direction, and support the folding rollers 45 and 46 from the inner side in the radial direction.

  In FIGS. 1, 2, and 3, the outer flange 54 constituting a part of the moving means 53 has a cylindrical surface 57 having a cylindrical shape on the outer periphery, and swings to the inner limit in the radial direction with the cylindrical surface 57. A slight gap is formed between each folding arm 42 and the radially inner side surface 42a. The cylindrical surface 57 is formed with a plurality of storage recesses 58 (the same number as the folding arms 42) extending in the radial direction and spaced apart at equal angles in the circumferential direction. These storage recesses 58 swing to the inner limit in the radial direction. At this time, the folding arm 42 is disposed at a position facing the radially inner side surface 42a, and a suction body 59 made of a magnet is housed and installed in the housing recess 58. Here, a permanent magnet or an electromagnet can be used as the magnet described above, and a permanent magnet is used here. On the other hand, the folding arm 42 is entirely made of a ferromagnetic material such as steel, cobalt, nickel, or an alloy thereof. As a result, when the folding arm 42 swings to the inner limit in the radial direction, the suction body The radially inner side surface 42a of the folding arm 42 at a position facing 59 is attracted by the magnetic force of the suction body 59, and the part sucked by the suction body 59 becomes the sucked portion 60. In the present invention, most of the folded arm 42 is made of a non-magnetic material, for example, a diamagnetic material such as a copper alloy, or a paramagnetic material such as an aluminum alloy, while facing the attracting body 59. Only the folding arm 42 may be made of a ferromagnetic material, and a portion made of the ferromagnetic material may be used as the attracted portion. In the present invention, the suction body may be arranged in a state of continuously extending in the circumferential direction around the cylindrical surface.

  Also, in the present invention, in contrast to the above, a suction body made of a magnet is installed on the radially inner side surface 42a of the folding arm 42, while a sucked portion to be sucked by the suction body is installed on the cylindrical surface 57. You may do it. Thus, either the radial inner side surface 42a of the folding arm 42 or the cylindrical surface 57 provided on the moving means 53 at a position facing the radial inner side surface 42a of the folding arm 42 swung to the inner limit in the radial direction. While a suction body made of a magnet is installed on one side, a suctioned part to be sucked by the suction body is installed on the other side of the radially inner side surface 42a or the cylindrical surface 57, and the folding arm 42 swings to the radially inner limit. Since the attracted portion is attracted by the magnetic force of the attracting body when moving, the distance between the attracting body and the swing center located at the proximal end of the folding arm 42, that is, the force The length of the arm of the moment can be easily increased. As a result, even if the mass (weight) of each folding arm 42 is large, the folding arm 11, the tire component 34, and the folding arm 42 are rotated when the folding arm 42 rotates. Outside of the arm 42 in the radial direction It is possible to effectively restrict the swinging of the. At this time, the folding arm 42 is also given a swinging force inward in the radial direction based on the elastic force from the elastic rings 48 and 49 as in the conventional case. In addition, when the folding arm 42 swings from the radially inner limit toward the radially outer side, the radial gap between the suction body 59 and the sucked portion 60 increases, and the axis of the folding arm 42 is increased. Since the displacement in the axial direction between the suction body 59 and the sucked part 60 due to movement inward in the direction increases, the suction force by the suction body 59 rapidly decreases and disappears, and the sucked part 60 is smoothly detached from the suction body 59 can do.

Then, while placing the suction body or the suction unit installed in the folding-back arm 42 to the tip portion of the該折-back arms 42, placing the remaining other attractant or the suction unit to the cylindrical surface 57 of the outer flange 54 By doing so, the length of the arm of the aforementioned moment of force can be greatly increased, and thereby the effect of restricting the swinging arm 42 to swing outward in the radial direction can be greatly improved. Further, when the folding arm or the cylindrical surface of the moving means is made of a ferromagnetic material, special work can be performed if the attracted part which is a part thereof is made of a ferromagnetic material which is the same material. The suctioned portion can be installed on the folding arm or the cylindrical surface without performing the above.

Here, before Symbol attractant 59 (permanent magnet) is because it is generally fragile, radially inner surface 42a is sucked body該折-back arm 42 for some reason during the swing radially inward limit of the folded arms 42 If it collides with 59, the suction body 59 may be damaged. For this reason, in this embodiment, the outer surface of the suction body 59 stored in the storage recess 58 is made smaller than the cylindrical surface 57 by making the radial length of the suction body 59 slightly smaller than the depth of the storage recess 58. While retracting only a small amount, the opposing surface (outer surface) of the suction body 59 facing the suctioned portion 60 is made of steel or the like and covered with the metal cover 63 stored in the storage recess 58. Yes. In the present invention, the metal cover may cover a surface other than the opposing surface (outer surface) of the suction body 59, but it is not preferable to cover the entire surrounding area. In this way, if at least the facing surface of the suction body 59 facing the suction target 60 is covered with a metal cover, the suction body 59 and the suction target 60 collide when the folding arm 42 swings to the inner limit in the radial direction. Even if such a situation occurs, damage to the attracting body 59 (permanent magnet), which is relatively fragile, can be effectively prevented. Further, when the opposing surface of the suction body 59 is covered with the metal cover 63 in this way, the folding arm 42 swings to the inner limit in the radial direction, so that the suction body 59 and the suction target 60 are connected to the metal cover 63. The suction body 59 can be prevented from being damaged even if it is contacted indirectly via the.

  Further, as the permanent magnet constituting the above-described attracting body 59, for example, an alnico magnet, a ferrite magnet, or a samarium cobalt magnet can be used, but the effect of restricting the swinging arm 42 to swing outward in the radial direction is greatly improved. For this purpose, it is preferable to use a neodymium magnet having a high magnetic flux density and a strong magnetic force. And it is preferable to use the magnet in the range whose magnetic flux density is 0.6-1.5T (Tesla) as the attracting body 59 mentioned above. The reason is that if the magnetic flux density is less than 0.6T, when the rotational speed of the forming drum 11 and the folding arm 42 is high, the folding arm 42 may swing off the attraction force (magnetic force) and swing outward in the radial direction. On the other hand, if it exceeds 1.5T, when the folding arm 42 swings inward in the radial direction, the folding arm 42 has a large force caused by the suction body 59 in addition to the elastic force of the elastic rings 48 and 49. Since the attraction force acts, the folding arm 42 suddenly stops at the inner limit in the radial direction, but this sudden stop causes a large vibration in the folding arm 42 and breaks the permanent magnet constituting the attracting body 59. This is because there is a risk of doing so.

Next, the operation of the first embodiment will be described.
When a green tire is molded using the molding drum 11 as described above, first, a cylindrical tire constituent member 34 is molded with a molding drum different from the molding drum 11, and then the tire constituent member 34 A bead core 36 with a filler 35 is set on both outer sides in the axial direction, and then the tire component 34 and the bead core 36 with a filler 35 are conveyed to the molding drum 11 by conveying means and fitted to the outside of the molding drum 11. To do. The state at this time is shown in FIG. Next, when the high pressure fluid is supplied to the outer chamber 27b and the piston 28 is moved inward in the axial direction, the bead lock segment 23 is synchronously moved radially outward to grip the bead core 36 from the inner side through the tire component 34. However, at this time, the tire constituent member 34 is partitioned into a main body portion 34a positioned between the pair of bead cores 36 and a folded portion 34b positioned on both outer sides in the axial direction from the bead core 36. Next, when the slider 21 and the bead lock segment 23 are brought close to each other by rotating the screw shaft 13 while supplying the pressurized fluid into the main body 34a, the main body 34a expands outward in the radial direction until the cross section is substantially arcuate. At this time, the folded portion 34b remains cylindrical. On the other hand, in each folding arm 42, the suction body 59 made of a magnet installed on the cylindrical surface 57 of the moving means 53 sucks the sucked portion 60 installed at a position facing the suction body 59 of the folding arm 42. Furthermore, since elastic force directed radially inward from the elastic rings 48 and 49 is applied to the folding arm 42, it is restricted to maintain the position of the radially inner limit, and does not swing outward in the radial direction. .

  Next, a high-pressure fluid is supplied to the inner chamber 50a, and the movable cylinder 41 and the folding arm 42 (base end portion) are synchronously moved toward the inner side in the axial direction so as to approach the tire constituent member 34. At this time, the folding rollers 45 and 46 supported at the tip of the folding arm 42 move radially outward while being in rolling contact with the folding portion 34b, so that each folding arm 42 is always applied to all the folding arms 42. While opposed to the elastic force of the elastic rings 48 and 49, the base ring portion that swings away from the bead core 36 swings so as to expand from the radially inner limit toward the radially outer side. As described above, when the folding arm 42 swings from the radially inner limit toward the radially outer side, the gap between the suction body 59 and the sucked portion 60 increases, and in addition, the axially inner side of the folding arm 42. Since the displacement in the axial direction between the suction body 59 and the sucked portion 60 due to the movement of the suction body increases, the suction force by the suction body 59 rapidly decreases and disappears. As a result, the sucked portion 60 is smoothly detached from the suction body 59, whereby the folding arm 42 is released from the suction force of the suction body 59 and can swing without being restricted by the suction body 59.

  The folding portion 34b having a cylindrical shape is moved around the bead core 36 while being pushed by the folding rollers 45 and 46 by the movement of the folding arm 42 in the axial direction and the swinging of the folding arm 42 in the radial direction as described above. The tire intermediate body G is formed by folding back along the portion 34a. At this time, each of the folding rollers 45 and 46 is pressed against the folded portion 34b by the elastic force applied from the elastic rings 48 and 49 via the folding arm 42, so that the folded portion 34b on the rolling path of the folding rollers 45 and 46 is provided. Is pressure-bonded to the filler 35 and the main body 34a. The state at this time is shown in FIG. Thus, immediately after the folding arm 42 starts swinging outward in the radial direction, the sucked portion 60 is detached from the suction body 59. Therefore, the pressing force applied from the folding rollers 45, 46 to the folding portion 34b when the folding portion 34b is folded. The force is applied only from the elastic rings 48 and 49 as in the conventional case. As a result, the folded portion 34b can be folded back with almost no compression marks.

  When the folding of the folding portion 34b is completed in this way, a high-pressure fluid is supplied to the outer chamber 50b, and the movable cylinder 41 and the folding arm 42 (base end) are separated from the tire intermediate G (tire component 34). Move outward in the direction. At this time, each folding arm 42 swings so as to shrink inward in the radial direction around the base end portion by the elastic force of the elastic rings 48 and 49, so that the folding rollers 45 and 46 are placed on the folded portion 34b that has already been folded. Moves radially inward while in rolling contact. Then, when the folding rollers 45 and 46 reach the receiver 55 and are supported from the inside in the radial direction, each folding arm 42 also swings to the inner limit in the radial direction and stops. Aspirate part 60. In this state, the forming drum 11, the slider 21, the folding arm 42, and the tire intermediate G are integrally rotated, while, for example, a stitching roller of a stitching means (not shown) is pressed against the folding portion 34b of the tire intermediate G. While moving gradually outward in the radial direction. As a result, stitching is performed on the folded portion 34b, and the air remaining between the folded portion 34b, the filler 35, and the main body portion 34a is discharged.

  Here, as described above, when the forming drum 11, the folding arm 42, and the like rotate integrally, centrifugal force acts on each folding arm 42, and the folding arm 42 tends to swing around the base end portion. Since the attracted portion 60 is attracted by the attracting body 59 made of a magnet as described above, the length of the arm of the moment of force based on the attracting force of the attracting body 59 can be easily increased. As a result, even if the mass of each folding arm 42 is large, it is possible to keep the folding arm 42 at the inner limit in the radial direction and to effectively regulate the swinging outward in the radial direction. ) And the folding arm 42 can be avoided. Next, a cylindrical belt tread band is carried outside the tire intermediate G, and the slider 21 and the bead lock segment 23 are moved further inward in the axial direction to approach each other. As a result, the tire intermediate G is deformed into a substantially toroidal shape, and the outer periphery thereof is pressure-bonded to the inner periphery of the belt tread band to form a green tire.

    FIG. 4 is a diagram showing Embodiment 2 of the present invention. In this embodiment, a storage recess 66 similar to the storage recess 58 is formed on the radially inner side surface 42a of the folding arm 42 at a position facing the suction body 59 installed on the cylindrical surface 57 of the moving means 53. In each storage recess 66, a suctioned part 67 made of a permanent magnet similar to the suction body 59 is stored and installed. Here, the magnetic pole on the side close to the suction body 59 of the suctioned portion 67 is a magnetic pole opposite to the magnetic pole on the side close to the suctioned portion 67 of the suction body 59. As a result, the suction body 59 and the suction target The parts 67 suck each other. If the attracting body 59 and the attracted part 67 are both composed of magnets in this way, the force for attracting both is increased, and the swinging of the folding arm 42 to the outside in the radial direction can be strongly restricted.

  At this time, the suction body 59 is spaced from the cylindrical surface 57 by an equal angle in the circumferential direction and is installed in the same number as the number of the folding arms 42, while the sucked portion 67 constituted by the magnet is disposed on the central axis of the tire constituent member 34. If it is arranged on a radial line connecting (the axis of the forming drum 11) and the suction body 59, installation work of the suction body 59 made of magnets and the sucked portion 67 is facilitated. Further, the exposed surface of the sucked portion 67 housed in the housing recess 66 is retracted by a slight amount from the radially inner side surface 42a, and the facing surface (exposed surface) of the sucked portion 67 facing the suction body 59 is It is made of steel or the like and is covered with a metal cover 68 housed in the housing recess 66. In the case of such a structure, the magnet installed on the folding arm 42 may be regarded as an attracting body, and the magnet installed on the cylindrical surface 57 of the moving means 53 may be regarded as a member to be attracted.

  The present invention can be applied to an industrial field in which a folded portion of a tire constituent member positioned on the axially outer side from a bead core is folded along a main body portion that is bulged and deformed radially outward.

34 ... Tire component 34a ... Main body
34b ... Folding part 36 ... Bead core
42… Folding arm 42a… Radial inner surface
48, 49 ... elastic ring 53 ... moving means
57 ... Cylindrical surface 59 ... Suction body
60 ... Suction part 63 ... Metal cover

Claims (1)

A tire component member folding device that folds along the main body a folding portion that is located on both outer sides in the axial direction from the bead core of a tire component having a main body portion that bulges and deforms radially outward between a pair of bead cores. A plurality of folding arms which are respectively installed on both outer sides in the axial direction of the bead core and are spaced apart from each other in the circumferential direction and swingable in a radial direction around a base end portion separated from the bead core; An elastic ring that is fitted to the outside of the arm and constantly applies an elastic force toward the inside in the radial direction to all the folded arms, and the distal end of the folded arm by synchronously moving the proximal end of the folded arm in the axial direction. The folding arm is swung radially outward against the elastic force of the elastic ring while the part is in contact with the folding part, and the folding part is moved along the body part. Or a cylindrical surface provided on the moving means at a position facing the radially inner side surface of the folded arm swung to the inner limit in the radial direction. While a suction body made of a magnet is installed on one side, a suction target to be sucked by the suction body is installed on the other inner side surface of the radial direction or the cylindrical surface, and the folding arm swings to the inner limit in the radial direction. When the suction member is sucked by the suction body, the swinging arm is restricted from swinging radially outward, and at least the facing surface of the suction body facing the suction portion is covered with a metal cover. Further, a folding device for a tire component member , wherein a suction body or a sucked portion installed on the folding arm is disposed at a tip portion of the folding arm .

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