JP5906602B2 - Belt forming method and apparatus - Google Patents

Description

  The present invention relates to a belt forming method and apparatus for forming a belt that functions as one of constituent members of a tire, and a belt holding jig.

  Conventionally known general pneumatic tires are configured by providing one or a plurality of belt layers on the outer peripheral side of the carcass layer and providing a tread on the outer peripheral side of the belt layer. As this belt layer, it has been proposed to provide a reinforcing layer around which a steel cord or the like is wound so that the winding angle with respect to the tire circumferential direction is substantially 0 degrees.

  Conventionally, when manufacturing a pneumatic tire, a sheet-like member such as a carcass or an inner liner is wound around a band drum to form a cylindrical band member, while a sheet-like member such as a belt layer or a tread is formed on the belt drum. A tubular belt member is formed by winding, and a band member is assembled to the inside of the outer belt member to form a tire shape, and vulcanization is performed.

  Such a tire manufacturing apparatus is described in the following patent document.

JP 2006-116817 A JP 2006-347003 A

  When a pneumatic tire having a reinforcing layer is manufactured by the conventional tire manufacturing apparatus described above, a steel cord is wound on a belt layer wound around a belt drum, and a tread is wound around the steel cord. It is necessary to mold the belt member. This steel cord has a length of 200 m to 500 m in the case of a single winding, and takes a long time to be wound around the belt drum. Therefore, the belt member molding time becomes longer than the band member molding time, and the waiting time increases, so that the tire molding time becomes longer, and the productivity of tire manufacturing is greatly reduced. .

  The present invention solves the above-described problems, and an object thereof is to provide a belt forming method and apparatus and a belt holding jig capable of improving tire productivity.

  In order to solve the above-described problems and achieve the object, the belt forming method of the present invention includes a cord winding step of winding a reinforcing cord around an outer peripheral surface of a forming drum while rotating the forming drum, and a belt holding inside the reinforcing cord. A jig attaching step for inserting a jig; and a jig removing step for removing the belt holding jig holding the reinforcing cord from the forming drum.

  According to this belt forming method, the reinforcing cord is wound around the outer peripheral surface of the forming drum while rotating the forming drum, the belt holding jig is inserted inside the reinforcing cord, and the belt holding jig holding the reinforcing cord is removed from the forming drum. Therefore, separately from the other belt layers, the reinforcing layer constituted by the reinforcing cord is formed and stored in a state where it is held by the belt holding jig, and if necessary, the reinforcing layer is removed from the belt holding jig. The tire productivity can be improved by performing the tire forming operation continuously and efficiently.

  In the belt forming method of the present invention, after completion of the jig attaching step, the holding of the reinforcing cord is released by reducing the outer diameter of the forming drum in the jig removing step. To do.

  According to this belt forming method, the reinforcing cord is wound around the outer peripheral surface of the forming drum, the belt holding jig is inserted inside the reinforcing cord, the outer diameter of the forming drum is reduced, and the holding of the reinforcing cord is released. In addition, the belt holding jig holding the reinforcing cord can be removed from the forming drum, and workability can be improved.

  In the belt forming method of the present invention, a cord holding step for holding the reinforcing cord from the outside is provided after the cord winding step is finished, and the outer diameter of the forming drum is reduced after the reinforcing cord holding step is finished. Thus, the holding of the reinforcing cord is released, and a belt holding jig is inserted inside the reinforcing cord in the jig attaching step.

  According to this belt forming method, the reinforcing cord is wound around the outer peripheral surface of the forming drum, and after holding the reinforcing cord from the outside, the outer diameter of the forming drum is reduced to release the holding of the reinforcing cord. By inserting the belt holding jig inside, the reinforcing cord can be properly held by the belt holding jig while suppressing deformation of the reinforcing cord.

  In the belt forming method of the present invention, an inner belt winding step is provided in which one or more inner belt layers are wound around the outer peripheral surface of the forming drum while rotating the forming drum, and the winding is wound around the forming drum in the cord winding step. The reinforcing cord is wound around an outer peripheral surface of the inner belt layer formed.

  According to this belt molding method, the inner belt layer is wound around the outer circumferential surface of the belt while rotating the molding drum, the reinforcing cord is wound around the outer circumferential surface of the belt layer, and the belt is wound inside the inner belt layer and the reinforcing cord. Since the holding jig is inserted and the belt holding jig holding the inner belt layer and the reinforcing cord is removed from the forming drum, the inner belt layer and the reinforcing layer are formed and stored while being held by the belt holding jig. It can be used by removing it from the belt holding jig as required.

  In the belt forming method of the present invention, an outer belt winding step of winding one or more outer belt layers around the outer peripheral surface of the reinforcing cord while rotating the forming drum is provided.

  According to this belt forming method, the inner belt layer is wound around the outer peripheral surface of the forming drum while rotating the forming drum, the reinforcing cord is wound around the outer peripheral surface of the belt layer, and the outer belt layer is wound around the outer peripheral surface of the reinforcing cord. The belt holding jig is inserted inside the belt layer, the reinforcing cord, and the outer belt layer wound, and the belt holding jig is removed from the molding drum. Therefore, the inner belt layer, the reinforcing layer, and the outer belt layer are attached to the belt holding jig. It can be formed and stored in a state of being held in the belt, and can be used by removing it from the belt holding jig as required.

  In the belt forming method of the present invention, the belt holding jig has a plurality of holding rods arranged in a ring shape at equal intervals, and the reinforcing cords are inserted by inserting the plurality of holding rods inside the reinforcing cords. It is characterized by holding.

  According to this belt forming method, the plurality of holding rods in the belt holding jig are inserted and held inside the reinforcing cord, whereby the reinforcing cord is easily and stably held by the plurality of holding rods. be able to.

  The belt forming apparatus of the present invention can hold the reinforcing cord by inserting a rotatable forming drum, a cord winding device for winding a reinforcing cord around the outer peripheral surface of the forming drum, and inserting the reinforcing cord inside the reinforcing cord. And a belt holding jig.

  According to this belt forming apparatus, the reinforcing cord is wound around the outer peripheral surface of the forming drum while rotating, the belt holding jig is inserted inside the reinforcing cord, and the belt holding jig holding the reinforcing cord is removed from the forming drum. Since it is removed, a state in which the reinforcing layer constituted by the reinforcing cord is held in the belt holding jig is stored separately from the other belt layers, and the reinforcing layer is removed from the belt holding jig as necessary. The tire productivity can be improved by performing the tire forming operation continuously and efficiently.

  In the belt forming apparatus of the present invention, the belt holding jig has a plurality of holding rods arranged in a ring shape at equal intervals, and the plurality of holding rods are inserted inside the reinforcing cord and The reinforcing cord can be held.

  According to this belt forming apparatus, the plurality of holding rods in the belt holding jig are inserted and held inside the reinforcing cord, whereby the reinforcing cord is easily and stably held by the plurality of holding rods. be able to.

  In the belt forming apparatus of the present invention, the forming drum has a plurality of segments arranged in a ring shape at a predetermined interval and movable in the radial direction, and the belt holding jig includes the plurality of holding rods. The reinforcing cord can be held by being inserted between the plurality of segments.

  According to this belt forming apparatus, since the plurality of holding rods in the belt holding jig are inserted between the segments, the reinforcing cord can be easily held, and the reinforcing cord is moved by moving the plurality of segments. The holding release operation can be easily performed in a short time.

  In the belt forming apparatus of the present invention, a transfer is provided that can hold the outside of the reinforcing cord wound around the forming drum, and the transfer holds the outside of the reinforcing cord, while the forming drum is the reinforcing cord. The belt holding jig is capable of inserting and holding the plurality of holding rods inside the reinforcing cord in a state where the inner holding of the belt is released.

  According to this belt forming apparatus, with the transfer holding the outer side of the reinforcing cord and the forming drum releasing the holding of the inner side of the reinforcing cord, each holding rod of the belt holding jig is inserted inside the reinforcing cord. By holding, the reinforcing cord can be properly held by the belt holding jig while suppressing deformation of the reinforcing cord.

  In the belt forming apparatus of the present invention, a belt layer winding apparatus for winding a belt layer around the outer peripheral surface of the forming drum is provided.

  According to this belt forming apparatus, the belt layer can be formed inside, outside or on both sides of the reinforcing layer constituted by the reinforcing cord, and the workability of the assembling work in the reinforcing layer and the belt layer can be improved. .

  Further, the belt holding jig of the present invention is provided on the inner side of the reinforcing cord from the rotational axis direction of the molding drum with respect to the reinforcing layer formed by winding at least the reinforcing cord around the outer peripheral surface of the rotatable molding drum. A plurality of holding rods can be inserted into the reinforcing layer to hold the reinforcing layer.

  According to this belt holding jig, since the reinforcing layer formed by the reinforcing cord can be held, the reinforcing layer constituted by the reinforcing cord is held by the belt holding jig separately from the other belt layers. Can be formed and stored, and if necessary, the reinforcing layer can be removed from the belt holding jig and used to improve tire productivity by continuously and efficiently performing tire molding operations. can do.

  A belt forming method and apparatus and a belt holding jig according to the present invention include a belt holding jig that winds a reinforcing cord while rotating a forming drum, inserts the belt holding jig inside the reinforcing cord, and holds the reinforcing cord. Since it is removed from the molding drum, it will be stored in a state where the reinforcing layer constituted by the reinforcing cord is held by the belt holding jig, and if necessary, the tire is molded by removing the reinforcing layer from the belt holding jig. The work can be performed continuously and efficiently to improve tire productivity.

FIG. 1 is a schematic diagram showing a belt forming method and apparatus according to a first embodiment of the present invention. FIG. 2 is a schematic configuration diagram of the belt forming apparatus according to the first embodiment. FIG. 3 is a schematic view illustrating a storage state of the belt layer in the belt forming apparatus according to the first embodiment. FIG. 4 is a schematic diagram illustrating the belt holding jig of the first embodiment. FIG. 5 is an explanatory diagram illustrating the operation of the belt forming apparatus of the first embodiment. FIG. 6 is an explanatory diagram illustrating the operation of the belt forming apparatus according to the first embodiment. FIG. 7 is an explanatory diagram illustrating the operation of the belt forming apparatus of the first embodiment. FIG. 8 is an explanatory diagram illustrating the operation of the belt forming apparatus according to the first embodiment. FIG. 9 is an explanatory diagram illustrating the operation of the belt forming apparatus according to the first embodiment. FIG. 10 is an explanatory diagram illustrating the operation of the belt forming apparatus according to the first embodiment. FIG. 11 is an explanatory diagram illustrating the operation of the belt forming apparatus of the first embodiment. FIG. 12 is a schematic view showing a belt forming method and apparatus according to the second embodiment of the present invention. FIG. 13 is a schematic view showing a belt holding method in the belt forming method and apparatus according to the third embodiment of the present invention.

  Embodiments of the present invention will be described below in detail with reference to the drawings. In addition, this invention is not limited by this embodiment. The constituent elements of this embodiment include those that can be easily replaced by those skilled in the art or those that are substantially the same. Further, the plurality of embodiments described in this embodiment can be arbitrarily combined within the scope obvious to those skilled in the art.

[First Embodiment]
FIG. 1 is a schematic view showing a belt forming method and apparatus according to a first embodiment of the present invention, FIG. 2 is a schematic configuration diagram of the belt forming apparatus of the first embodiment, and FIG. 3 is a belt of the first embodiment. FIG. 4 is a schematic diagram showing the belt holding jig of the first embodiment, and FIGS. 5 to 11 show the operation of the belt molding device of the first embodiment. It is explanatory drawing.

  Although not shown in the drawings, the pneumatic tire applied in the first embodiment includes a tread portion, shoulder portions disposed on both sides of the tread portion, and sidewall portions and bead portions sequentially continuing from the shoulder portions. It is what is done. And, this pneumatic tire has a carcass layer, an inner liner layer, a first belt layer, a second belt layer, a reinforcing layer, a third belt layer, a fourth belt layer, a belt edge cushion (BEC), a tread layer from the inside. Etc. are laminated.

  The belt forming apparatus forms a part of the belt layer in the pneumatic tire described above. The belt forming apparatus according to the first embodiment includes a first belt layer, a second belt layer, a belt edge cushion, and a reinforcing layer. It is to be molded.

  In the first embodiment, as shown in FIGS. 1 and 2, the belt forming apparatus 10 includes a rotatable forming drum 11, and a belt layer winding apparatus 13 that winds a belt layer around the outer peripheral surface of the forming drum 11. The cord winding device 14 winds a reinforcing cord around the outer peripheral surface of the forming drum 11 and a belt holding jig 15 that can be inserted inside the belt layer or the reinforcing cord to hold the cord.

  The forming drum 11 includes a first drum 21 and a second drum 22. The drive shafts 23 and 24 of the first drum 21 and the second drum 22 are arranged on a straight line and are rotatably supported by a support device 25. ing. The first and second driving devices 26 and 27 can rotate the first and second drums 21 and 22 in the forward rotation direction and / or the reverse rotation direction via the drive shafts 23 and 24. Further, the support device 25 is driven by a rotation device (reversing device) 28, and the first and second drums 21 and 22 are rotated by 180 degrees in the lateral direction with the support device 25 as a fulcrum, so that the position thereof is increased. Can be reversed.

Further, as shown in FIG. 3, the belt holding jig 15 can be attached to and detached from the forming drum 11 (the first drum 21 and the second drum 22). The molding drum 11 has a plurality of segments 29 arranged in a ring shape, and the plurality of segments 29 can be synchronously moved in the radial direction by a driving device (not shown). Therefore, when the plurality of segments 29 are moved inward in the radial direction and the belt holding jig 15 is disposed outside the plurality of segments 29 and the plurality of segments 29 are moved outward in the radial direction, each segment 29 becomes a belt. the inner circumferential surface of the holding jig 15 by pressing, it is possible to hold the belt holding jig 15. On the other hand, when each segment 29 holds the belt holding jig 15 and moves each segment 29 inward in the radial direction, each segment 29 is separated from the inner peripheral surface of the belt holding jig 15 to release the pressure. By doing so, the holding of the belt holding jig 15 can be released.

  As shown in FIGS. 1 and 2, the belt layer winding device 13 includes a first belt supply device 31 that supplies a first belt (first belt layer) B1 and a second belt (second belt layer) B2. A second belt supply device 32 for supplying and a BEC supply device 33 for supplying a belt edge cushion (BEC) E1 are configured. In this case, the first belt B1 and the second belt B2 are arranged such that the cords covered with rubber have a predetermined angle with respect to the tire circumferential direction, that is, the tire equator line. Further, the first belt B1 and the second belt B2 are disposed so as to intersect with each other's belts in which cords forming an angle with respect to the tire circumferential direction are laminated.

The cord winding device 14 supplies a steel cord (reinforcing cord) S for forming a reinforcing layer. The cord winding device 14 includes a cord reel 41 that accommodates the steel cord S, a rubber coating machine 42 that continuously coats the steel cord S with rubber, and a feeding device that feeds the steel cord S coated with rubber. A machine 43, a festoon 44 for adjusting the excess or deficiency of the steel cord S by winding the steel cord S between a plurality of vertically movable rollers, a pasting machine 45 for attaching the steel cord S to the forming drum 11, It comprises guide rollers 46 and 47 provided before and after the festoon 44. In this case, the steel cord S in which rubber coated, the tire circumferential direction, i.e., parallel (substantially 0 degrees, for example, 0 to 5 degrees) with respect to the tire equator line so as to be arranged along the direction, the belt The holding jig 15 is supplied and wound in the circumferential direction.

  As shown in FIGS. 3 and 4, the belt holding jig 15 includes a disk-shaped main body 51 and a plurality of holding rods 52 protruding in one direction from the outer peripheral portion of the main body 51. The plurality of holding rods 52 are fixed so as to protrude from the outer periphery of the main body 51 in the direction orthogonal to each other with the same length, and are arranged at equal intervals along the circumferential direction, thereby forming a substantially ring shape. . The belt holding jig 15 is made of a hard material such as a metal (steel or the like) or a resin that hardly changes its shape. The belt holding jig 15 can insert a plurality of holding rods 52 inside a belt layer or a reinforcing cord wound around the outer peripheral surface of the forming drum 11 (the first drum 21 and the second drum 22). . That is, since the plurality of segments 29 arranged in a ring shape can move in the radial direction in the forming drum 11, when the plurality of segments 29 move inward in the radial direction, the adjacent ones closely contact each other. When the segment 29 moves outward in the radial direction, a gap is formed between adjacent ones. The belt holding jig 15 can be inserted and held inside a belt layer, a reinforcing cord, or the like by inserting a plurality of holding rods 52 into the gaps between the segments 29 moved outward. .

In the first embodiment, as shown in FIG. 1, the belt forming apparatus 10 forms a belt layer B (first belt B1, second belt B2, belt edge cushion E1, steel cord on the outer peripheral surface of the belt holding jig 15. After S) is wound, it is stored in this state. Then, a belt laminate is formed by another belt forming apparatus 100. The belt forming apparatus 100 includes a third belt supply apparatus 101 that supplies a third belt (third belt layer) B3, a fourth belt supply apparatus 102 that supplies a fourth belt (fourth belt layer) B4, and a belt. A BEC supply device 103 that supplies an edge cushion (BEC) E2 and a tread supply device 104 that supplies a tread T are configured.

That is, the belt forming apparatus 100 has the third belt on the outer circumferential surface of the belt layer B (first belt B1, second belt B2, belt edge cushion E1, steel cord S) removed from the belt holding jig 15. After winding B3, the fourth belt B4, the belt edge cushion E2 and the tread T, a carcass (not shown) with an inner liner attached is supplied to the inner peripheral surface to form a green tire.

And the belt shaping apparatus 10 of 1st Embodiment comprised in this way can shape | mold a belt with the following processes.
1. 1. Inner belt winding step of winding the first and second belts B1 and B2 around the outer peripheral surface while rotating the forming drum 11. 2. A cord winding step of winding a steel cord S around the outer sides of the first and second belts B1 and B2 wound around the forming drum 11 while rotating the forming drum 11. 3. Jig mounting step of inserting the belt holding jig 15 inside the first and second belts B1 and B2 and the steel cord S wound around the forming drum 11. Jig removing step of removing the belt holding jig 15 holding the first and second belts B1 and B2 and the steel cord S from the forming drum 11.

  Hereinafter, the belt forming method by the belt forming apparatus 10 of the first embodiment will be specifically described with reference to FIGS.

  In the belt forming method by the belt forming apparatus 10 of the first embodiment, first, as shown in FIG. 5, the first drum 21 in the forming drum 11 is disposed at a position facing the belt layer winding apparatus 13, while the second The drum 22 is disposed at a position facing the cord winding device 14.

  Next, as shown in FIG. 6, while driving and rotating the first drum 21, the belt layer winding device 13 is operated, the first belt B1 is supplied by the first belt supply device 31, and the first drum is rotated. The first belt B <b> 1 is wound around the outer peripheral surface of the belt 21. Subsequently, the second belt B2 is supplied by the second belt supply device 32, and the second belt B2 is wound around the outer peripheral surface of the rotating first drum 21 (first belt B1). Further, the belt edge cushion E1 is supplied by the BEC supply device 33, and the belt edge cushion E1 is wound around the outer peripheral surface of the rotating first drum 21 (belts B1, B2).

  Then, when the first belt B1, the second belt B2, and the belt edge cushion E1 are wound around the outer peripheral surface of the first drum 21, as shown in FIG. The positions of the first drum 21 and the second drum 22 are reversed. That is, the first drum 21 in the forming drum 11 is disposed at a position facing the cord winding device 14, while the second drum 22 is disposed at a position facing the belt layer winding device 13. In this state, the cord winding device 14 is operated to supply the steel cord S, and the steel cord S is wound around the outer peripheral surfaces of the first belt B1, the second belt B2, and the belt edge cushion E1 in the rotating first drum 21. To go.

  On the other hand, as shown in FIG. 8, while the second drum 22 is driven and rotated, the belt layer winding device 13 is operated, the first belt B1 is supplied by the first belt supply device 31, and the second drum 22 is rotated. The first belt B1 is wound around the outer circumferential surface. Subsequently, the second belt B2 is supplied by the second belt supply device 32, and the second belt B2 is wound around the outer peripheral surface of the rotating second drum 22 (first belt B1). Further, the belt edge cushion E1 is supplied by the BEC supply device 33, and the belt edge cushion E1 is wound around the outer peripheral surface of the rotating second drum 22 (belts B1, B2).

  When the winding of the steel cord S is completed on the first drum 21, as shown in FIG. 9, the steel cord S is cut and terminal processing is performed. Then, as shown in FIG. 10, the forming drum 11 is rotated 180 degrees by the rotating device 28, and the positions of the first drum 21 and the second drum 22 are reversed. That is, the first drum 21 in the forming drum 11 is disposed at a position facing the belt layer winding device 13, while the second drum 22 is disposed at a position facing the cord winding device 14. In this state, the belt holding jig 15 (the plurality of holding rods 52) is inserted into the first belt B1 on the first drum 21, thereby the first belt B1, the second belt B2, and the belt edge cushion E1. The steel cord S is held.

  Further, the outer periphery of the first belt B1, the second belt B2, and the belt edge cushion E1 in the rotating second drum 22 by operating the cord winding device 14 and supplying the steel cord S to the second drum 22. Wrap the steel cord S around.

  Since the belt holding jig 15 holds the first belt B1, the second belt B2, the belt edge cushion E1, and the steel cord S in the first drum 21, as shown in FIG. Remove the belt holding jig 15 from the belt. That is, the holding of the belt layer B is released by moving each segment 29 in the first drum 21 inward, and this is transferred to the belt holding jig 15. Then, in a state where the belt layer B composed of the first belt B1, the second belt B2, the belt edge cushion E1, and the steel cord S is held by the belt holding jig 15, it is stored in a predetermined position. Then, as shown in FIG. 6, after moving each segment 29 to the outside, the winding operation of the first belt B1 is started around the first drum 21, and the processes in FIG.

  When the winding of the steel cord S is completed in the second drum 22, the steel cord S is cut and subjected to terminal processing, and the forming drum 11 is rotated 180 degrees by the rotating device 28, and the first drum 21 and the second drum 22 are rotated. The position of the drum 22 is reversed. In this state, the belt holding jig 15 (the plurality of holding rods 52) is inserted into the first belt B1 by the second drum 22, so that the first belt B1, the second belt B2, and the belt edge cushion E1. The steel cord S is held. Since the belt holding jig 15 holds the first belt B1, the second belt B2, the belt edge cushion E1, and the steel cord S on the second drum 22, the belt holding jig 15 is removed from the second drum 22. Remove. That is, the holding of the belt layer B is released by moving each segment 29 in the second drum 22 inward, and this is transferred to the belt holding jig 15. Then, in a state where the belt layer B composed of the first belt B1, the second belt B2, the belt edge cushion E1, and the steel cord S is held by the belt holding jig 15, it is stored in a predetermined position.

  Then, as shown in FIG. 8, after moving each segment 29 to the outside in the second drum 22, the winding operation of the first belt B1 is started around the second drum 22, and the processing from FIG. Repeat.

Thereafter, as shown in FIG. 1, the belt forming apparatus 100 removes the belt layer B from the belt holding jig 15 on which the belt layer B is held, and attaches the belt layer B to the forming drum. The belt layer B (the first belt B1, the second belt B2, the belt edge cushion E1, and the steel cord S) has a third belt B3, a fourth belt B4, a belt edge cushion E2, and a tread on the outer peripheral surface thereof. After winding T in order, a carcass with an inner liner attached is supplied to the inner peripheral surface to form a green tire.

  As described above, in the belt forming method of the first embodiment, the inner belt winding step of winding the first and second belts B1 and B2 around the outer peripheral surface of the forming drum 11 while rotating the forming drum 11, and the forming drum 11 are rotated. However, a cord winding step in which the steel cord S is wound around the outer peripheral surface of each of the belts B1, B2 wound around the forming belt 11, and a belt holding jig 15 is inserted inside the belts B1, B2 and the steel cord S. A tool attaching step and a jig removing step for removing the belt holding jig 15 around which the belts B1 and B2 and the steel cord S are wound from the forming drum 11 are provided.

  Accordingly, the first and second belts B1 and B2 are wound around the outer peripheral surface of the forming drum 11 while rotating, and the steel cord S is wound around the outer peripheral surfaces of the first and second belts B1 and B2. The belt holding jig 15 is inserted inside, and the belt holding jig 15 around which the belt layer B composed of the belts B1 and B2 and the steel cord S is wound is removed from the forming drum 11. Therefore, the belt layer B composed of the belts B1 and B2 and the steel cord S is formed and stored in the belt holding jig 15, and the belt layer B is removed from the belt holding jig 15 as necessary. The tire productivity can be improved by performing the tire forming operation continuously and efficiently.

  In the belt forming method according to the first embodiment, after the jig attaching step, the outer diameter is reduced by moving each segment 29 in the forming drum 11 inward in the jig removing step. The holding of the code S is released. Accordingly, the first and second belts B1 and B2 and the steel cord S are wound around the outer peripheral surface of the forming drum 11, the belt holding jig 15 is inserted therein, and then each segment 29 is moved inward to move the outer diameter. The belt holding jig 15 holding the steel cord S can be removed from the forming drum 11 and the workability can be improved.

  Further, in the belt forming apparatus of the first embodiment, a rotatable forming drum 11, a belt layer winding device 13 for winding the first and second belts B1 and B2 around the outer peripheral surface of the forming drum 11, and the forming A cord winding device 14 for winding the steel cord S around the outer peripheral surface of the drum 11 and a belt holding jig 15 that can be inserted inside the first and second belts B1 and B2 and the steel cord S to hold them are provided. ing.

  Accordingly, the belt layer winding device 13 winds the first and second belts B1 and B2 around the outer peripheral surface of the forming drum 11, and the cord winding device 14 winds the steel cord S around the outer peripheral surface of the belts B1 and B2. A belt holding jig 15 is inserted inside the belts B 1 and B 2 and the steel cord S, and the belt holding jig 15 is removed from the forming drum 11. Therefore, the belt layer B composed of the belts B1 and B2 and the steel cord S is formed and stored in the belt holding jig 15, and the belt layer B is removed from the belt holding jig 15 as necessary. The tire productivity can be improved by performing the tire forming operation continuously and efficiently.

  Further, in the belt forming apparatus of the first embodiment, as the belt holding jig 15, a plurality of holding rods 52 that protrude from the main body 51 and are arranged at equal intervals in a ring shape are provided, and the plurality of holding rods 52 are arranged as belt layers. It can be inserted and held inside B. Therefore, by inserting and holding the plurality of holding rods 52 in the belt holding jig 15 inside the belt layer B, the belt layer B can be easily and stably held by the plurality of holding rods 52. Can do.

  In the belt forming apparatus of the first embodiment, the forming drum 11 is provided with a plurality of segments 29 arranged in a ring shape with a predetermined interval and movable in the radial direction, and the belt holding jig 15 has a plurality of holding rods 52. Is inserted between the plurality of segments 29 so that the belt layer B can be held. Therefore, since the plurality of holding rods 52 in the belt holding jig 15 are inserted between the segments 29, the belt layer B can be easily held. The holding release operation can be easily performed in a short time.

  In the belt holding jig of the first embodiment, the belt layer B formed by winding the belts B1 and B2 and the steel cord S around the outer peripheral surface of the rotatable forming drum 11 is formed. A plurality of holding rods 52 can be inserted and held inside the belt layer B from the direction of the rotation axis of the drum 11.

  Therefore, since the belt holding jig 15 can hold the belt layer B, it is possible to form and store a state in which the belt layer B is held separately from the other belt layers. The belt layer B can be removed and used, and the tire productivity can be improved by continuously and efficiently performing the tire forming operation.

[Second Embodiment]
FIG. 12 is a schematic view showing a belt forming method and apparatus according to the second embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the member which has the same function as embodiment mentioned above, and detailed description is abbreviate | omitted.

  The belt forming apparatus forms a part of the belt layer in the pneumatic tire, and the belt forming apparatus of the second embodiment forms a reinforcing layer.

  In the second embodiment, as shown in FIG. 12, the belt forming device 60 includes a rotatable forming drum 61, a cord winding device 14 for winding the steel cord S around the outer peripheral surface of the forming drum 61, and the inside of the reinforcing cord. And a belt holding jig 15 which can be inserted and held.

The forming drum 61 is composed of one drum, and can be rotated in the forward rotation direction and / or the reverse rotation direction by a driving device (not shown). The forming drum 61 is configured such that the belt holding jig 15 can be attached and detached by a segment 29 as in the drums 21 and 22 of the first embodiment. The cord winding device 14 includes a cord reel 41, a rubber coating machine 42, a feeding machine 43, a festoon 44, a pasting machine 45, and guide rollers 46 and 47.

  In the second embodiment, after the steel cord S is wound around the outer peripheral surface of the forming drum 61 by the belt forming device 60, the belt holding jig 15 is inserted and held inside the steel cord S, and this belt holding is performed. The jig 15 is stored in a state where it is removed from the molding drum 61. Then, a belt laminate is formed by another belt forming apparatus 100. The belt forming apparatus 100 includes a third belt supply apparatus 101 that supplies a third belt B3, a fourth belt supply apparatus 102 that supplies a fourth belt B4, a BEC supply apparatus 103 that supplies a belt edge cushion E2, and a tread. The tread supply device 104 supplies T.

  That is, the belt forming apparatus 100 winds the belts B3, B4, the belt edge cushion E2, and the tread T1 around the outer peripheral surface of the steel cord S removed from the belt holding jig 15. Thereafter, a carcass (not shown) with an inner liner attached is supplied to the inner peripheral surface to form a green tire.

  Thus, in the belt forming method of the second embodiment, the cord winding step of winding the steel cord S around the outer peripheral surface of the forming drum 61 while rotating the forming drum 61, and the belt holding jig 15 inside the steel cord S. A jig attaching step for inserting and a jig removing step for removing the belt holding jig 15 around which the steel cord S is wound from the forming drum 11 are provided.

  Accordingly, the steel cord S is wound around the outer peripheral surface of the forming drum 61 while rotating, the belt holding jig 15 is inserted inside the steel cord S, and the belt holding jig 15 around which the steel cord S is wound is used as the forming drum 11. Will be removed. Therefore, apart from the other belts B1 to B4, the reinforcing layer made of the steel cord S is formed and stored in the belt holding jig 15, and the reinforcing layer is held by the belt as necessary. It can be used by being removed from the jig 15, and the tire productivity can be improved by performing the tire forming operation continuously and efficiently.

[Third Embodiment]
FIG. 13 is a schematic diagram illustrating a belt forming method and apparatus according to a third embodiment of the present invention. The basic configuration of the belt forming apparatus of the present embodiment is substantially the same as that of the above-described first embodiment, and will be described with reference to FIG. 1 and a member having the same function as that of the above-described embodiment. Are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the third embodiment, as shown in FIG. 1, a belt forming apparatus 10 includes a rotatable forming drum 11, a belt layer winding device 13 that winds a belt layer around the outer peripheral surface of the forming drum 11, and a forming drum 11. The cord winding device 14 winds the reinforcing cord around the outer peripheral surface of the belt, and the belt holding jig 15 that can be inserted into the belt layer and the reinforcing cord to hold them.

  The forming drum 11 includes a first drum 21 and a second drum 22, and is rotatably supported by a support device 25. The first and second drums 21 and 22 are rotated by 180 degrees with the support device 25 as a fulcrum. By doing so, the position can be reversed. Further, as shown in FIG. 13, the forming drum 11 (the first drum 21 and the second drum 22) releases the holding after inserting the belt holding jig 15 inside the belt layer B wound around the outer peripheral surface. Thus, the belt layer B can be transferred to the belt holding jig 15. The forming drum 11 has a plurality of segments 29 arranged in a ring shape, and the belt layer B can be wound around the outer side of the plurality of segments 29 while the segments 29 are moved outward. On the other hand, the belt layer B can be transferred to the belt holding jig 15 by inserting the belt holding jig 15 inside the belt layer B.

  The belt forming apparatus 10 according to the third embodiment has a transfer 71 that can hold the outside of the belt layer B wound around the forming drum 11. This transfer 71 has a plurality of holding members 72 arranged in a ring shape so as to face each segment 29 on the outside of the forming drum 11. Each holding member 72 of the transfer 71 can be moved in the radial direction in synchronization with the plurality of holding members 72 by a driving device (not shown).

  Therefore, the belt layer B can be wound around the outside of the forming drum 11 with the plurality of holding members 72 moved outward in the radial direction. When the holding member 72 is moved inward in the radial direction in a state where the belt layer B is wound around the forming drum 11, the outside of the belt layer B can be held. Thereafter, when each segment 29 of the forming drum 11 is moved inward in the radial direction, each segment 29 can be separated from the inner peripheral surface of the belt layer B to release the holding. In this state, by inserting the belt holding jig 15 inside the belt layer B, the belt holding jig 15 can hold the belt layer B. Subsequently, when the holding members 72 are moved outward in the radial direction, the holding members 72 are separated from the outer peripheral surface of the belt layer B to release the holding, and the belt layer B is received by the belt holding jig 15. The belt holding jig 15 holding the belt layer B can be removed from the forming drum 11.

That is, the belt forming apparatus 10 of the third embodiment can form a belt by the following steps.
1. 1. Inner belt winding step of winding the first and second belts B1 and B2 around the outer peripheral surface while rotating the forming drum 11. 2. A cord winding step of winding a steel cord S around the outer sides of the first and second belts B1 and B2 wound around the forming drum 11 while rotating the forming drum 11. 3. A cord holding step for holding the steel cord S from the outside by the transfer 71. 4. Jig attachment step of inserting the belt holding jig 15 inside the first and second belts B1 and B2 and the steel cord S wound around the forming drum 11. Jig removing step of removing the belt holding jig 15 holding the first and second belts B1 and B2 and the steel cord S from the forming drum 11.

  As described above, in the belt forming method according to the third embodiment, after the cord winding step, the cord holding step for holding the belt layer B from the outside is provided, and after the cord holding step, the outside of the forming drum 11 is provided. The holding of the belt layer B is released by reducing the diameter, and the belt holding jig 15 is inserted inside the belt layer B in the jig attaching step.

  Therefore, after the steel cord S is wound around the outer peripheral surface of the forming drum 11 and the belt layer B is held from the outside, the outer diameter of the forming drum 11 is reduced to release the holding of the belt layer B. By inserting the belt holding jig 15 into the belt layer B, the belt layer B can be properly held by the belt holding jig 15 while suppressing deformation of the belt layer B.

  Further, in the belt forming apparatus of the third embodiment, a transfer 71 that can hold the outside of the belt layer B wound around the forming drum 11 is provided, and the transfer 71 holds the outside of the belt layer B, while a segment. In a state in which the inner holding of the belt layer B by the forming drum 11 is released by moving 29, each holding rod 52 of the belt holding jig 15 can be inserted and held inside the belt layer B.

  Accordingly, each holding rod 52 of the belt holding jig 15 is inserted inside the belt layer B in a state where the transfer 71 holds the outside of the belt layer B and the forming drum 11 releases the holding inside the belt layer B. The belt layer B can be appropriately held by the belt holding jig 15 while suppressing deformation of the belt layer B.

  In each of the embodiments described above, the cord winding device 14 is configured to continuously wind one steel cord S. However, a plurality of steel cords S may be wound in order or simultaneously. Good. According to this configuration, the winding time of the steel cord S can be shortened by dividing the steel cord S and winding it a plurality of times while rotating the forming drums 11 and 61.

  In the above-described embodiments, the forming drums 11 and 61 have one or two drums. However, the three or more drums are rotated by a predetermined angle by a reversing device to invert each drum. You may comprise.

DESCRIPTION OF SYMBOLS 10,60 Belt forming apparatus 11,61 Forming drum 13 Belt layer winding apparatus 14 Cord winding apparatus 15 Belt holding jig 21 First drum 22 Second drum 25 Support apparatus 29 Segment 31 First belt supply apparatus 32 Second belt Supply device 33 BEC supply device 51 Main body 52 Holding rod 71 Transfer 101 Third belt supply device 102 Fourth belt supply device 103 BEC supply device 104 Tread supply device B Belt layer B1 First belt (first belt layer)
B2 Second belt (second belt layer)
B3 3rd belt (3rd belt layer)
B4 4th belt (4th belt layer)
E1, E2 Belt edge cushion (BEC)
S Steel cord (reinforcement cord, reinforcement layer)

Claims (6)

A cord winding step in which a reinforcing cord is wound around the outer peripheral surface of the molding drum while rotating;
A jig attaching step of inserting a belt holding jig inside the reinforcing cord;
A jig removing step of removing the belt holding jig holding the reinforcing cord from the forming drum;
Have
After the cord winding step, a cord holding step is provided to hold a position of the reinforcing cord facing the outside of the holding position of the forming drum. After the cord holding step , the outer diameter of the forming drum is reduced. In the state where the holding of the reinforcing cord by the diameter is released, in the jig mounting step, the position facing the outside of the reinforcing cord is held and the holding of the reinforcing cord by the forming drum is released, Insert a belt holding jig inside the reinforcement cord,
A belt forming method characterized by the above. An inner belt winding step of winding one or a plurality of inner belt layers around the outer peripheral surface of the molding drum while rotating the molding drum is provided, and the outer periphery of the inner belt layer wound around the molding drum in the cord winding step The belt forming method according to claim 1 , wherein the reinforcing cord is wound around a surface. 3. The belt forming method according to claim 1, further comprising an outer belt winding step of winding one or more outer belt layers around the outer peripheral surface of the reinforcing cord while rotating the forming drum. The belt holding jig includes a plurality of holding rods arranged in a ring shape at equal intervals, and the plurality of holding rods are inserted inside the reinforcing cords to hold the reinforcing cords. The belt forming method according to any one of claims 1 to 3 . A rotatable molding drum;
A cord winding device for winding a reinforcing cord around the outer peripheral surface of the molding drum;
A belt holding jig that can be inserted inside the reinforcing cord and hold the reinforcing cord;
With
The belt holding jig has a plurality of holding rods arranged in a ring shape at equal intervals, and the plurality of holding rods can be inserted inside the reinforcing cord to hold the reinforcing cord,
The forming drum has a plurality of segments arranged in a ring shape at a predetermined interval and movable in a radial direction, and the belt holding jig inserts the plurality of holding rods between the plurality of segments. The reinforcing cord can be held;
A transfer capable of holding the outside of the reinforcing cord wound around the forming drum is provided, and the transfer holds a position facing the outside of the holding position of the segment in the reinforcing cord, while the forming drum serves as the reinforcing cord. In the state where the inner holding of the belt is released, the belt holding jig can hold the plurality of holding rods inserted into the reinforcing cord,
A belt forming apparatus. The belt forming apparatus according to claim 5 , wherein a belt layer winding device for winding the belt layer around the outer peripheral surface of the forming drum is provided.

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