JP2010208176A - Forming apparatus for carcass ply and method of manufacturing reformed carcass ply - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent adhesion by facilitating peeling of a fixing member pressing a carcass ply from the carcass ply in forming a side end part of the carcass ply. <P>SOLUTION: A carcass ply on a mount 10 is pressed down and fixed by pressing a fixing member 30 toward the carcass ply 50 along positions for forming a formed part 51 of the carcass ply 50, and a forming roll 20 is pressed toward the carcass ply 50 and moved along the positions for forming a formed part 51. The forming roll 20 is pressed toward the carcass ply 50 to push into a recessed groove 11 of the mount 10 and carry out plastic deformation in order, and the side end part of the carcass ply 50 is bent to form the formed part 51. A contact surface 32 of the fixing member 30 coming into contact with the carcass ply 50 is surface-treated to impart peelability to the carcass ply 50, and, after the forming, the fixing member 30 is peeled from the carcass ply 50 and raised to release the fixing. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a carcass ply brazing apparatus that bends and braces a side end portion of a carcass ply that is wound around a bead core so as to wind around the bead core, and a method for manufacturing the brazed carcass ply.

  A tire such as a pneumatic tire generally includes a bead core disposed on both bead portions and a carcass ply extending between the bead portions, and the side end portions of the carcass ply are folded around the bead core to form bead portions. keeping. As a tire bead structure, a so-called wind structure is known in which a side end portion of a carcass ply is wound around a bead core and wrapped (see Patent Document 1).

  In this tire, the side ends of the carcass ply are plastically deformed and bent in advance corresponding to a plurality of corner positions of the polygonal cross-section of the bead core, and subjected to brazing in accordance with the cross-sectional shape, to the outer surface of the bead core. Winding along. Conventionally, as such a carcass ply brazing device, the side end portion of the carcass ply is pressed and plastically deformed and bent, and a plurality of brazing portions are formed in order, and the side end portion corresponds to the bead core. An apparatus for performing brazing is known (see Patent Document 2).

FIG. 3 is a main part front view schematically showing an example of such a conventional carcass ply brazing apparatus, and FIG. 4 is a cross-sectional view in the width direction of the brazed carcass ply.
As shown in FIG. 3A, the conventional brazing device 100 is disposed near a mounting table 10 (for example, a width-shifting anvil or a support table) on which the carcass ply 50 is mounted, and an end portion in the width direction on the upper surface side. And a brazing roll 20 that can roll, and a fixing member 30 that is disposed in the vicinity of the inner side in the width direction (left side in the figure).

  When brazing with this brazing apparatus 100, the carcass ply 50 on the mounting table 10 is pressed and fixed by the fixing member 30, and the outer circumferential surface of the brazing roll 20 is positioned at a position where a brazing portion of the carcass ply 50 is formed. Press against one end and press. Thus, the carcass ply 50 is pushed into the concave groove 11 formed in the mounting table 10 to be plastically deformed, and in this state, the brazing roll 20 is moved along the longitudinal direction (the concave groove 11) of the carcass ply 50. It rolls to an end part, the side edge part of the carcass ply 50 is bent, and the brazing part 51 is formed. Subsequently, the fixing member 30 and the brazing roll 20 are raised and separated from the carcass ply 50, and they are moved to the next brazing position to similarly form a brazing portion. In this way, as shown in FIG. 4, the brazing portions 51, 52, 53 are sequentially formed at a plurality of locations (here, 3 locations) on the side end portion of the carcass ply 50, and the scissors are oriented to wrap around the bead core. Apply.

  However, in this conventional brazing apparatus 100, at the time of brazing, the fixing member 30 is pressed against and closely contacts the carcass ply 50, and their contact surfaces may be bonded together. As a result, even if the fixing member 30 is raised when the brazing position is changed or when the brazing is completed (see FIG. 3B), the fixing member 30 and the carcass ply 50 are kept in close contact with each other, and the carcass ply 50 is not separated. There is a possibility that the side end portion of the plate is lifted from the mounting table 10 by the fixing member 30. In this case, since the carcass ply 50 needs to be peeled off from the fixing member 30 and mounted again at a predetermined position on the mounting table 10 before the next brazing, the brazing operation is smooth and stable. There is a problem that the progress is hindered and the working efficiency is lowered. In addition, when the carcass ply 50 after the completion of brazing is transported from the mounting table 10 and used in a subsequent process such as a forming drum, there is a possibility that the carcass ply 50 cannot be smoothly moved and has a problem and cannot be transported properly.

Japanese Patent Laid-Open No. 2000-21916 JP 2008-260138 A

  The present invention has been made in view of such a conventional problem, and an object of the present invention is to easily separate the carcass ply from the fixing member that holds the carcass ply when the side end portion of the carcass ply is brazed. Thus, it is possible to prevent contact and improve the work efficiency by proceeding the brazing operation smoothly and stably and to ensure proper conveyance of the carcass ply after the completion of the brazing.

The present invention relates to a carcass ply brazing device that bends and braces a side end portion of a carcass ply wound around a bead core, and a mounting table on which at least the side end portion of the carcass ply is mounted; A fixing member that presses and fixes the carcass ply, a fixing member that has been subjected to a surface treatment that adds peelability to the carcass ply on the contact surface with the carcass ply, and a pressing means that presses and bends the side end of the fixed carcass ply. , Provided.
The present invention also relates to a manufacturing method for manufacturing a brazed carcass ply by bending and brazing a side end portion of a carcass ply wound around a bead core, wherein at least the side end portion of the carcass ply is mounted on a mounting table. A step of placing and fixing the carcass ply on the mounting table by a fixing member that has been subjected to a surface treatment that adds peelability to the carcass ply on the contact surface with the carcass ply; and The method includes a step of pressing and bending the side end portion, and a step of releasing the fixing by releasing the fixing member from the carcass ply after brazing.

  According to the present invention, when the side end portion of the carcass ply is brazed, the fixing member for holding the carcass ply and the carcass ply can be easily peeled to prevent adhesion, and the brazing operation can be performed smoothly and stably. As a result, the work efficiency can be improved and the proper conveyance of the carcass ply after the completion of the brazing can be ensured.

FIG. 1A is a front view schematically showing the main part of the carcass ply brazing device of this embodiment, and FIG. 1B is a side view seen partially from the side of FIG. 1A. It is a front view which shows typically the state of the brazing apparatus after completion | finish of brazing. It is a principal part front view which shows typically the example of the brazing apparatus of the conventional carcass ply. FIG. 5 is a cross-sectional view in the width direction of a brazed carcass ply.

DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a carcass ply brazing apparatus and a method for producing a brazed carcass ply according to the present invention will be described with reference to the drawings.
The carcass ply brazing device of the present embodiment is similar to the above-described brazing device 100 (see FIG. 3), and the side end portion of the carcass ply (the end region of the side portion in the width direction that is a winding portion around the bead core). Is a device that plastically deforms and bends and forms a brazed portion in advance to perform brazing. However, in this brazing apparatus, peeling between the fixing member and the carcass ply is facilitated to prevent their adhesion.

  The carcass ply is a sheet-like member including the carcass ply material to be brazed, and is formed by stacking one or more carcass ply materials, or in addition to the carcass ply material, other members such as an inner liner Are arranged at predetermined positions. In the following, in the same manner as described above, in correspondence with the cross-sectional shape of the bead core (here, the hexagonal cross-section), the predetermined positions (three locations corresponding to the corner positions of the bead core) on both side ends of the carcass ply are set. The case where the attachment portion is formed will be described as an example. Furthermore, although the operation | movement etc. which form the brazing part (refer FIG. 4) of the outermost side of the width direction about one side edge part of a carcass ply are demonstrated here, the other side edge part and other positions are demonstrated. The brazing portion is formed in the same manner.

FIG. 1A is a front view schematically showing a main part of a carcass ply brazing device of the present embodiment, and FIG. 1B is a side view seen partially from the side (right side of the drawing) of FIG. 1A. It is.
As shown in the figure, the brazing device 1 includes a mounting table 10 for the carcass ply 50, a brazing roll 20 disposed on the upper surface side thereof, and a fixing member 30 disposed in the vicinity of the brazing roll 20. I have. The brazing device 1 also includes various sensors such as movement or position detection means provided in each part of the device, and a control device (not shown) that controls the entire device to which they are connected.

  The mounting table 10 has a mounting surface (supporting surface) on which at least a side end portion that forms the brazing portion 51 of the carcass ply 50 is mounted, and is supplied from a supply means (not shown) to a predetermined position. The side end portion of the carcass ply 50 to be placed is supported by the placement surface and held at the placement position. Further, the mounting surface of the mounting table 10 has, for example, a V-shaped cross section extending in the longitudinal direction at a predetermined position on the end side in the width direction (left-right direction in FIG. 1A) according to the formation position of the brazing portion 51. A concave groove 11 having a shape, a U shape, a rectangular shape or the like (here, a V shape) is formed. In addition, the mounting table 10 has a side wall 12 (not shown in FIG. 1B) that protrudes upward, and is provided over the entire end portion in the width direction, and the end portion of the carcass ply 50 is arranged in accordance with the side wall 12. By doing so, it functions as a width-shifting anvil that defines the position in the width direction.

  The brazing roll 20 is a brazing member for pressing the carcass ply 50 to form the brazing portion 51. The brazing roll 20 is formed in a disk shape and has a V-shaped or U-shaped cross section provided on the outer peripheral portion thereof. The carcass ply 50 is pushed into the concave groove 11 and brazed by the pushing portion 21 such as. Further, the brazing roll 20 is supported by the support member 22 so as to be rotatable around the axis line with its axis line parallel to the width direction of the mounting table 10, and moved in the width direction and the longitudinal direction of the mounting table 10 (carcass ply 50). It is possible and can be contacted and separated from the mounting surface.

  Furthermore, the brazing apparatus 1 includes a moving mechanism (not shown) including a driving mechanism that moves the brazing roll 20 in each direction, a pressurizing mechanism that presses the pushing portion 21 against the carcass ply 50 with a predetermined pressure, and the like. ing. As a result, the brazing device 1 moves the brazing roll 20 along the planned brazing position (concave groove 11) while pressing the brazing roll 20 against the portion of the carcass ply 50 where the brazing portion 51 is formed. At that time, the brazing device 1 makes the pushing portion 21 of the brazing roll 20 and the concave groove 11 of the mounting table 10 face each other, and the pushing portion 21 of the brazing roll 20 is placed at a predetermined pressure on the carcass ply 50 positioned therebetween. Press and push into the groove 11. By this pressing, the carcass ply 50 is pushed into the concave groove 11 and is plastically deformed into a shape corresponding to the cross-sectional shape (here, V-shaped in cross section), and the carcass ply 50 is bent to form the brazed portion 51. .

  The fixing member 30 constitutes fixing means for pressing and fixing the carcass ply 50 on the mounting table 10, and here, along the brazing portion 51, the width direction inner side (center side) of the carcass ply 50 (FIG. 1A). Then, the left side) is pressed against the mounting table 10 and fixed. As a result, the fixing member 30 restricts the movement of the carcass ply 50 against the force acting from the brazing roll 20 during brazing, and prevents displacement in the brazing direction or the width direction. The fixing member 30 is a long plate-like member having an L-shaped cross section (see FIG. 1A), and is disposed along the concave groove 11 above the mounting table 10 with the carcass ply 50 interposed therebetween. The carcass ply 50 is brought into contact with the lower surface (contact surface 32) of the projecting piece (presser plate 31) projecting toward the surface.

  The brazing device 1 includes moving means (not shown) for moving the fixing member 30 in the vertical direction and the width direction, thereby moving the fixing member 30 closer to and away from the carcass ply 50 and away from the carcass ply 50. To each brazing position. At the same time, the brazing device 1 brings the contact surface 32 of the fixing member 30 into contact with the carcass ply 50 and presses it with a predetermined pressure, and presses a predetermined range of the carcass ply 50 against the mounting table 10 with the contact surface 32. The entire longitudinal direction along the forming position of the attaching portion 51 is pressed and fixed.

  Here, the fixing member 30 is subjected to a surface treatment for adding a peelability to the carcass ply 50 on the contact surface 32 with the carcass ply 50, and when the carcass ply 50 is released, the fixing member 30 can be easily removed from the surface. It comes to peel off. The surface treatment of the fixing member 30 may be performed by bonding the carcass ply 50 to the contact surface 32, for example, by forming minute irregularities such as lines or dots on the contact surface 32 or making the contact surface 32 a satin surface. ) Is performed by performing a processing (surface processing) treatment for preventing the above. Alternatively, the contact surface 32 is coated with a low-adhesion (hard adsorption) material (silicone compound, fluorine compound, etc.) having low adhesion to the rubber constituting the carcass ply 50, or each treatment is performed. It is given in combination. Here, the adhesion surface to the carcass ply 50 is applied to the contact surface 32 of the fixing member 30 by knurling or shot blasting to improve adhesion to the carcass ply 50. They prevent their close contact.

  The brazing device 1 further includes holding means (not shown) that detachably holds the side end of the carcass ply 50 on the mounting surface of the mounting table 10 on the mounting table 10. The whole along the brazing position is held on the mounting table 10. This holding means connects, for example, a suction port that opens to the mounting surface of the mounting table 10 and a suction pump that is a negative pressure source via a pipe line provided in the mounting table 10 and the like, and is sucked by a suction pump. Then, the carcass ply 50 facing the suction port is sucked and held. Alternatively, when a metal cord attached to the magnet is arranged as a reinforcing layer in the carcass ply 50, the holding means may be an electromagnet provided in the mounting table 10 and capable of turning on / off the power source, or the mounting table 10 It may be configured by means for holding by magnetic force via a metal cord, such as a magnet that changes the strength of the magnetic force by moving toward and away from the mounting surface. In this way, the holding means sucks the carcass ply 50 from the mounting table 10 side to attract and hold the carcass ply 50 to the mounting table 10 or pulls the metal cord in the carcass ply 50 by magnetic force. It comprises magnetic holding means for holding on the mounting table.

  Next, the procedure and operation for manufacturing the brazed carcass ply 50 by brazing the side ends of the carcass ply 50 using the brazing apparatus 1 of the present embodiment and the brazing method will be described. The brazing device 1 first transports the carcass ply 50 onto the mounting table 10 and sets it at a predetermined position while positioning it along the side wall 12, and at least the side end of the carcass ply 50 (here, the carcass ply 50 Is placed on the mounting table 10. Next, the fixing member 30 is disposed above the carcass ply 50 along the concave groove 11 and lowered, and is pressed against the carcass ply 50, so that the entire one side along the formation position of the brazing portion 51 of the carcass ply 50 is It is sandwiched between the mounting table 10 and pressed. In this manner, the carcass ply 50 on the mounting table 10 is pressed and fixed by the fixing member 30 that has been subjected to a surface treatment that adds peelability to the carcass ply 50 on the contact surface 32 with the carcass ply 50, The fixing member 30 is maintained in the same state until the formation of 51 is completed.

  Subsequently, the brazing device 1 moves the brazing roll 20 to one end portion in the longitudinal direction (right side in FIG. 1B) according to the position where the brazing portion 51 of the carcass ply 50 is formed, and the brazing roll The 20 pushing portions 21 are arranged so as to face the concave groove 11 of the mounting table 10 with the carcass ply 50 interposed therebetween. In this state, the brazing roll 20 is pressed against the carcass ply 50 and pushed into the concave groove 11, and the portion is plastically deformed into a V shape, and bending and brazing of the carcass ply 50 is started. Next, while pressing the carcass ply 50, the brazing roll 20 is rotationally moved (rolled) at the predetermined speed along the longitudinal direction (arrow R in FIG. 1B).

  In this way, the brazing device 1 presses the side end portion of the fixed carcass ply 50 on the mounting table 10 in a state where the fixing member 30 presses and fixes the vicinity of the brazing position of the carcass ply 50, It is bent and brazed in order from one end to the other end along the longitudinal direction. Thereby, the side edge part of the carcass ply 50 is bent so as to be wound around the bead core, and one brazing part 51 is formed at a predetermined position of the side edge part. Therefore, the brazing roll 20 constitutes a pressing means that presses the carcass ply 50 and brazes it into a predetermined shape together with the moving means described above. Moreover, the brazing apparatus 1 raises the fixing member 30 and the brazing roll 20, separates them from the side end portions of the carcass ply 30 after the brazing, and finishes forming one brazing portion 51.

FIG. 2 is a front view schematically showing the state of the brazing device 1 after the completion of the brazing.
Here, when the fixing member 30 is separated from the carcass ply 50 after brazing, the carcass ply 50 is peeled off from the contact surface 32 of the fixing member 30 and the carcass ply 50 is mounted as shown in the figure in accordance with the surface treatment described above. The fixation is released in the state of being placed on the table 10. However, the brazing device 1 releases the fixing of the carcass ply 50 by at least the fixing member 30 by, for example, operating the holding means of the mounting table 10 at a predetermined timing before the rising of the fixing member 30 is started. Sometimes, the carcass ply 50 is detachably held on the mounting table 10 by the holding means. As a result, while the carcass ply 50 is securely held on the mounting table 10 side, the fixing member 30 is raised, and the contact surface 32 and the carcass ply 50 are separated.

  Thereafter, the brazing apparatus 1 moves the fixing member 30 and the brazing roll 20 and sequentially places the other brazing portions (see FIG. 4) in a similar procedure at a predetermined position inside the brazing portion 51 in the width direction. Form. In this manner, the side end portion of the carcass ply 50 that is wound around the bead core at the tire bead portion is bent in a direction to wind around the bead core at a plurality of positions in the width direction to form a brazed portion. In this way, the side ends on both sides of the carcass ply 50 are brazed according to the cross-sectional shape of the bead core, and the brazed carcass ply 50 is manufactured. Subsequently, the brazing device 1 releases the holding of the carcass ply 50 by the holding means described above, and removes the carcass ply 50 after the completion of the brazing from the mounting table 10. On the other hand, the brazed carcass ply 50 is transported from the mounting table 10 to a molding drum, another unvulcanized tire molding apparatus, etc., and used in the next tire molding process to be brazed. Is wound around the bead core. Further, an unvulcanized tire is formed by assembling other tire constituent members, and various product tires are manufactured by vulcanization molding or the like.

  As described above, in this brazing apparatus 1, the carcass ply 50 is brazed while pressing and fixing the carcass ply 50 with the fixing member 30, so that the carcass ply 50 being brazed moves and is displaced. Can be prevented, and the brazing portion can be accurately formed to increase the brazing accuracy. Moreover, since the surface treatment which adds the peelability with respect to the carcass ply 50 was performed to the contact surface 32 of the fixing member 30, when releasing the fixing member 30 from the carcass ply 50 after brazing, those contact surfaces are released. They can be easily separated from each other.

  As a result, adhesion (adhesion) between the fixing member 30 and the carcass ply 50 can be prevented, and the ascending fixing member 30 can be reliably separated from the carcass ply 50, and the carcass ply 50 on the mounting table 10 is fixed to the fixing member 30. Therefore, it is prevented from being lifted up and is maintained in the mounting state. Accordingly, the operation of changing the brazing position with respect to the side end can be started immediately without requiring the work of peeling the carcass ply 50 from the fixing member 30 and the resetting work of the mounting table 10, and the brazing work can be carried out smoothly and smoothly. It is possible to improve the work efficiency by proceeding stably. In addition, even when the carcass ply 50 after the completion of the brazing is transported from the mounting table 10 and used in a subsequent process, the carcass ply 50 can be transported appropriately without any trouble.

  Therefore, according to the present embodiment, when the side end portion of the carcass ply 50 is brazed, the fixing member 30 that holds the carcass ply 50 can be easily separated from the carcass ply 50 to prevent adhesion, and the brazing operation As a result, the working efficiency can be improved smoothly and stably. In addition, it is possible to ensure proper conveyance of the carcass ply 50 after the completion of brazing. Further, here, since the surface treatment applied to the fixing member 30 is an adhesion preventing process for the carcass ply 50, sufficient releasability can be maintained over a long period of time as compared with a coating process or the like.

  In this brazing device 1, the carcass ply 50 is detachably held on the mounting table 10 by the holding means when the fixing of the carcass ply 50 by the fixing member 30 is released, but without holding the carcass ply 50. The fixing member 30 may be separated from the carcass ply 50. Even if it does in this way, the fixing member 30 and the carcass ply 50 can be peeled easily, adhesion | attachment can fully be prevented, and each effect mentioned above can be acquired. However, if the holding means is operated as described above when releasing the fixation, the holding of the carcass ply 50 on the mounting table 10 and the separation and prevention of adhesion between the fixing member 30 and the carcass ply 50 can be more reliably performed. . Therefore, when releasing the fixing by the fixing member 30, it is desirable to hold the carcass ply 50 on the mounting table 10 and then separate the fixing member 30 from the carcass ply 50. On the other hand, in other stages (processes) of brazing including when the carcass ply 50 is transported, if the holding of the carcass ply 50 by the holding means is released, the transport of the carcass ply 50 and other operations are not hindered. .

  Further, this holding means is constituted by an adsorption holding means for adsorbing and holding the carcass ply 50 to the mounting table 10, so that each carcass ply 50 is the same regardless of the type of the carcass ply 50 or the internal reinforcing layer. Can be held in. On the other hand, the holding means is configured by magnetic holding means that draws the metal cord in the carcass ply 50 by magnetic force and holds it on the mounting table 10, thereby holding the carcass ply 50 without making an adsorption mark on the surface. be able to. At that time, if the magnetic holding means is provided with an electromagnet for controlling the holding of the carcass ply 50 by turning on and off the power, the switching between holding and releasing the holding of the carcass ply 50 can be easily performed, and the apparatus is complicated. Can also be suppressed.

  In the above, an example in which three brazing portions (see FIG. 4) are formed on each side end portion of the carcass ply 50 has been described. The brazing portions correspond to the cross-sectional shape (number of corner portions) of the bead core. The number may be increased or decreased and formed in the same manner as described above. In the present embodiment, the carcass ply 50 is brazed by the brazing roll 20. However, the carcass ply 50 is made to another brazing member by pressing a plate-like member against the carcass ply 50 and plastically deforming, for example. Or you may make it braze by pressing with a press means.

  DESCRIPTION OF SYMBOLS 1 ... Brazing apparatus, 10 ... Mounting stand, 11 ... Groove, 12 ... Side wall, 20 ... Brazing roll, 21 ... Pushing part, 22 ... Support member, 30 ... a fixing member, 31 ... a pressing plate, 32 ... a contact surface, 50 ... a carcass ply, 51 ... a brazing part.

Claims (7)

A carcass ply brazing device for bending and brazing a side end portion of a carcass ply wound around a bead core,
A mounting table on which at least a side end portion of the carcass ply is mounted;
A fixing member that presses and fixes the carcass ply on the mounting table and is subjected to a surface treatment that adds peelability to the carcass ply on the contact surface with the carcass ply;
A pressing means for pressing and bending the side end portion of the fixed carcass ply;
A carcass ply brazing device comprising: In the carcass ply brazing device according to claim 1,
A carcass ply brazing apparatus, wherein the surface treatment applied to the fixing member is an adhesion prevention process for the carcass ply. In the carcass ply brazing device according to claim 1 or 2,
A carcass ply brazing device comprising holding means for detachably holding a carcass ply on a mounting table when releasing the fixation of the carcass ply by a fixing member. In the carcass ply brazing device according to claim 3,
The carcass ply is characterized in that the holding means is an adsorption holding means for adsorbing and holding the carcass ply on the mounting table, or a magnetic holding means for drawing the metal cord in the carcass ply by a magnetic force and holding it on the mounting table. Brazing device. A manufacturing method for manufacturing a brazed carcass ply by bending and brazing a side end portion of a carcass ply wound around a bead core,
Placing at least the side end of the carcass ply on the mounting table;
Pressing and fixing the carcass ply on the mounting table with a fixing member that has been subjected to a surface treatment that adds peelability to the carcass ply on the contact surface with the carcass ply;
Pressing and bending the side end of the fixed carcass ply; and
Releasing the fixing member by releasing the fixing member from the carcass ply after brazing;
A method of manufacturing a brazed carcass ply characterized by comprising: The method for producing a brazed carcass ply according to claim 5,
A method for producing a brazed carcass ply, characterized in that the surface treatment applied to the fixing member is an adhesion preventing process for the carcass ply. In the manufacturing method of the brazed carcass ply according to claim 5 or 6,
A method of manufacturing a brazed carcass ply, comprising: a step of detachably holding the carcass ply on a mounting table when the carcass ply is fixed.

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