JP2016117173A - Green tire stitching device and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stitching device and a stitching method capable of suppressing positional shifting of each tire component during crimping and wrinkles on a surface even while appropriately discharging air from a tire member laminate formed by stacking a plurality of tire components.SOLUTION: The stitching device 1 for pressing the surface of a tire member laminate 3 formed by bonding a plurality of tire components 2 wound on the peripheral part of a molding drum 4 to each other to crimp the plurality of tire components 2 includes a main pressing roller 13 moved in the axial direction of the molding drum 4 and pressed to the tire member laminate 3 at first pressure so as to crimp the plurality of tire components 2 to each other, a plurality of projected parts 23a in the peripheral part, and a preceding pressing roller 23 moved in the axial direction of the molding drum 4, and pressed to the tire member laminate 3 before the main pressing roller 13 at second pressure lower than the first pressure.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a green tire stitching apparatus and method.

  2. Description of the Related Art As a green tire stitching device, a device that presses a pressing roller onto a surface of a tire member laminate in which a plurality of tire constituent members are wound around a molding drum is known. Although the plurality of tire constituent members are pressed against each other by pressing the pressing roller, air may remain between the tire constituent members.

  The stitching device of patent document 1 is provided with the 1st press roller and the 2nd press roller, and after making a plurality of tire constituent members press-fit with the 1st press roller mutually, it is a tire member by pressing with the 2nd press roller Unevenness is imparted to the surface of the laminate. As a result, when the green tire is vulcanized with a tire vulcanization mold, the air interposed between the green tire and the mold is discharged from the gap formed by the concave and convex portions. Yes.

JP2012-171150

  However, the stitching device of Patent Document 1 is not designed to exhaust air intervening between a plurality of tire constituent members bonded on a molding drum. That is, when the pressing force by the first pressing roller is increased in order to discharge the air interposed between the tire constituent members, the surface of the tire member laminate may be wrinkled or the position of each tire constituent member may be displaced. And cause molding defects.

  In addition, when the pressing force by the first pressing roller is weakened, defective bonding of the tire constituent members occurs, and the air interposed between the tire constituent members cannot be reliably discharged.

  The present invention provides a stitch that allows each tire constituent member to be pressure-bonded while suppressing displacement and surface wrinkles while suitably discharging air in a tire member laminate in which a plurality of tire constituent members are laminated. It is an object to provide a scanning apparatus and method.

  The present invention relates to a green tire stitch that presses the surface of a tire member laminate in which a plurality of tire constituent members wound around a peripheral portion of a molding drum are bonded to each other to press the plurality of tire constituent members. A main pressing roller that is pressed against the tire member laminate with a first pressure so as to be moved in the axial direction of the molding drum and press the plurality of tire constituent members together. It has a plurality of convex portions, is moved in the axial direction of the molding drum, and is pressed against the tire member laminate prior to the main pressing roller with a second pressure that is weaker than the first pressure. And a preceding pressing roller.

  According to the present invention, the temporary pressure-bonding portion pressed by the convex portion between the tire constituent members is pressed between the tire constituent members by pressing the tire member laminated body with the preceding pressing roller having the convex portion on the peripheral portion prior to the main pressing roller. While being able to form, a groove part can be formed between adjacent temporary crimping | compression-bonding parts. According to the temporary press-bonding portion, when the main pressing roller is pressed, the displacement of each tire constituent member is suppressed, and thereby the generation of wrinkles is suppressed without pressing the position-shifted portion. Furthermore, according to the groove part, when it presses with a main press roller, the air interposed between tire structural members can be efficiently discharged | emitted via a groove part.

  Therefore, according to the present invention, it is possible to form the temporary press-bonding portion while forming the groove portion in the tire member laminate with the preceding pressing roller prior to the main pressing roller, and subsequently press the main pressing roller with the main pressing roller. By doing so, while the air intervening between the respective tire constituent members is efficiently discharged through the groove portion, the provisional pressure-bonding portion suppresses the displacement of the tire constituent members and the occurrence of wrinkles, and the respective tire constituent members are suitably used. Can be crimped to.

  It is preferable to include a first linear actuator that presses the main pressing roller against the tire member laminate, and a second linear actuator that presses the preceding pressing roller against the tire member laminate.

  With this configuration, the main pressing roller and the preceding pressing roller can be pressed against the tire member laminate by different pressures. Thus, the main pressing roller is pressed at a first pressure suitable for firmly pressing each tire component while the preceding pressing roller is pressed at a second pressure suitable for temporarily pressing each tire component. Can be pressed. That is, each can be pressed with an optimal pressure.

  It is preferable that an elastic member is interposed between the preceding pressing roller and the second linear motion actuator.

  With this configuration, the preceding pressing roller can be suitably followed with respect to the thickness variation in the circumferential direction of the tire member laminate, and thereby the tire member laminate 3 can be more suitably pressed.

  The preceding pressing roller is preferably rotatable with respect to the axial direction of the molding drum so as to press the surface of the tire member laminate in a plane.

  With this configuration, it is possible to more suitably perform the temporary pressure bonding by pressing the preceding pressing roller with respect to the tire member laminate in a plane. In particular, even a tire member laminate having a complicated profile surface can be suitably subjected to temporary pressure bonding.

  The invention according to another aspect of the present invention is a green tire stitching method, wherein a plurality of tire constituent members are bonded to a peripheral portion of a molding drum to form a tire member laminate, and the molding drum is By rotating the tire member stack around the shaft core, the plurality of tire constituent members are pressure-bonded to each other while moving the main pressing roller in the axial direction of the molding drum by rotating the tire member stack around the shaft core. As described above, the second pressure that is weaker than the first pressure while pressing the tire member laminate with the first pressure and moving the preceding pressing roller having a plurality of convex portions in the circumferential direction in the axial direction of the molding drum. A stitching method characterized by pressing the tire member laminate prior to the main pressing roller with pressure.

  According to the stitching apparatus and method according to the present invention, each tire component member is restrained from being displaced and wrinkled on the surface while suppressing air remaining in a tire member laminate formed by laminating a plurality of tire component members. Can be crimped.

The front view which shows the aspect stitched with the stitching apparatus which concerns on one Embodiment of this invention. Sectional drawing which followed the II-II line | wire of FIG. 1 which shows a preceding press roller. The top view which shows the aspect currently stitched with the stitching apparatus of FIG. The front view which shows the aspect which is stitching other site | parts with the stitching apparatus of FIG.

  Embodiments according to the present invention will be described below with reference to the accompanying drawings. In addition, the following description is only illustrations essentially and does not intend restrict | limiting this invention, its application thing, or its use. Further, the drawings are schematic, and the ratio of each dimension is different from the actual one.

  FIG. 1 is a front view showing an aspect in which stitching is performed by a green tire stitching apparatus 1 according to the present embodiment. The stitching device 1 is a device that pressure-bonds a tire member laminate 3 in which a plurality of tire constituent members 2 are bonded to each other while discharging air interposed between the tire constituent members 2.

  The stitching device 1 includes a molding drum 4 around which the tire member laminate 3 is wound, a main pressing device 5 that presses the surface of the tire member laminate 3, and the tire member laminate 3 preceding the main pressing device 5. And a pre-pressing device 6 for pressing the surface. The stitching device 1 further includes a turning device 7 for turning the preceding pressing device 6 in a turning direction Z along the axial direction of the molding drum 4 and a control device 50.

  The tire constituent member 2 includes, for example, an inner liner 2A, a carcass ply 2B, a bead member 2C, and a sidewall member 2D, and these tire constituent members 2 are disposed on the peripheral portion of the molding drum 4. The tire member laminate 3 is configured by being wound and bonded in order. The tire member laminate 3 includes a profile surface 3 a having a predetermined uneven shape on the outer peripheral portion, and the profile surface 3 a is pressed by the main pressing device 5 and the preceding pressing device 6.

  The molding drum 4 has the tire member laminate 3 wound around a cylindrical outer peripheral surface, and rotates around the rotation axis L0 during stitching. Further, it is possible to expand and contract in the radial direction. The wound tire member laminate 3 is expanded to the outer diameter side, and a tread member and a belt member ( (Not shown).

  The main pressing device 5 and the preceding pressing device 6 are supported by the same moving body 8, and the moving bodies 8 are paired so as to be able to come into contact with and separate from both sides in the axial direction of the tire member laminated body 3 wound around the molding drum 4. Is arranged. In FIG. 1, the moving body 8 is shown only on one side, and the other side is omitted because it has the same configuration. The moving body 8 is configured to be movable along the axial direction of the molding drum 4 by a driving mechanism, and the driving mechanism can be configured by, for example, a ball screw 9 that is rotated by a motor (not shown).

  In the present embodiment, the moving body 8 moves so that the preceding pressing device 6 presses the surface of the tire member laminate 3 prior to the main pressing device 5 during stitching. Specifically, the moving body 8 is moved in the stitching movement direction F shown in FIG. 1 at the time of stitching, and the preceding pressing device 6 moves the stitching with respect to the main pressing device 5. Arranged on the direction F side. Further, the molding drum 4 is rotated in the rotation direction R0 (see FIG. 2) together with the movement of the moving body 8 in the stitching movement direction F.

  For this reason, in the tire member laminated body 3, the stitching target region W to which each tire constituent member 2 is bonded is first pressed spirally by the preceding pressing device 6, and subsequently, by the main pressing device 5, Further, it is pressed helically.

  The main pressing device 5 has a main pressing roller 13 rotatably provided at the tip of a first rod 12 that moves forward and backward by a first linear motion actuator 11. FIG. 2 shows a cross section of the preceding pressing roller 23 taken along the line II-II in FIG. 1. The main pressing roller 13 has a cylindrical shape and is pressed against the tire member laminate 3 in a state where it is pressed. Is rotated in the rotational direction R1 by the tire member laminate 3 that is rotated in the rotational direction R0. The rotation axis L1 of the main pressing roller 13 is parallel to the rotation axis L0 of the molding drum 4.

  Referring to FIG. 1, for example, an air cylinder can be adopted as the first linear actuator 11, and the first rod 12 is advanced and retracted in the radial direction with respect to the molding drum 4, and the main pressing roller 13. Is pressed against the surface of the tire member laminate 3 with a predetermined first pressure. The first pressure is preferably a pressure for bringing the plurality of tire constituent members 2 into pressure contact with each other. In the present embodiment, the first pressure is adjusted to be 0.2 to 0.3 MPa, for example. Further, the first linear actuator 11 advances and retracts the first rod 12 in a direction orthogonal to the rotation axis L0 of the molding drum 4 and the rotation axis L1 of the main pressing roller 13.

  The preceding pressing device 6 is configured such that a preceding pressing roller 23 is rotatably provided at the tip of a second rod 22 that moves forward and backward by a second linear actuator 21 via a bearing portion 25. Referring to FIG. 2, the preceding pressing roller 23 has a gear-like form, and specifically, is formed between a plurality of convex portions 23 a formed on the peripheral portion and adjacent convex portions 23 a and 23 a. And a plurality of recesses 23b.

  Then, in a state where the preceding pressing roller 23 is pressed against the tire member laminate 3, the tire member laminate 3 rotated in the rotation direction R0 by the molding drum 4 is driven to rotate in the rotation direction R2. The rotation axis L2 of the preceding pressing roller 23 is parallel to the rotation axis L0 of the molding drum and the rotation axis L1 of the main pressing roller 13 in a neutral position where the preceding pressing device 6 is not rotated by the turning device 7. is there.

  Referring to FIG. 1, an elastic member 26 is interposed between the second linear actuator 21 and the bearing portion 25, and the bearing portion 25 (preceding pressing roller 23) is directed in the radial direction toward the molding drum 4. Is being energized. As the elastic member 26, for example, a compression coil spring can be adopted.

  As the second linear actuator 21, for example, an air cylinder can be adopted, and the second rod 22 is advanced and retracted in the radial direction with respect to the molding drum 4, and the preceding pressing roller 23 is moved to the tire member laminated body 3. The surface is pressed with a predetermined second pressure. The second pressure is preferably a pressure for temporarily crimping a plurality of tire constituent members, and is set to be weaker than the first pressure for crimping each tire constituent member 2, for example, 0.05 MPa. Have been adjusted so that. The second linear actuator 21 advances and retracts the second rod 22 in a direction orthogonal to the rotation axis L0 of the molding drum 4 and the rotation axis L2 of the preceding pressing roller 23.

  The preceding pressing device 6 is supported by the moving body 8 via a turning device 7 (for example, a motor). The turning device 7 is controlled by the control device 50 to turn the preceding pressing device 6 in the axial direction of the molding drum 4.

  The control device 50 is realized by a known computer including a CPU, a memory, a storage device, and an input / output device, and software installed in the computer. The storage device of the control device 50 stores a database storing profile information which is shape data of the profile surface 3a of various tire member laminates 3, and profiles corresponding to the tire member laminates 3 to be stitched. Information is read from the database, and the swivel device 7 is controlled so that the preceding pressing roller 23 is pressed straight against the profile surface 3a.

  The stitching device 1 described above is used as follows. First, the tire member laminated body 3 is formed by winding a plurality of tire constituent members 2 around the outer periphery of the molding drum 4. Specifically, the inner liner 2A and the carcass ply 2B are wound, the bead member 2C is wound on both sides, and the carcass ply 2B is folded around the outer periphery of the bead member 2C. The side wall member 2D is wound around the outer periphery of 2B.

  Referring also to FIG. 2, in this state, the tire constituent members 2 are not in close contact with each other, and air is interposed. In the stitching device 1, each tire is pressed by pressing the preceding pressing device 6 and the main pressing device 5 against the stitching target region W along the sidewall member 2 </ b> D on the outer surface of the tire member laminate 3. The air interposed between the component members 2 is discharged, and the tire component members 2 are pressure-bonded to each other.

  In a state where the molding drum 4 is rotated in the rotation direction R0, the moving body 8 is moved in the stitching movement direction F so that the preceding pressing roller 23 presses the tire member laminated body 3. At this time, as shown in FIG. 2, the preceding pressing device 6 arranged on the stitching direction F side first approaches the tire member laminate 3 and presses the leading pressing roller 23 at the tip. Then, the preceding pressing roller 23 is pressed against the tire member laminate 3 by the second pressure by the second linear motion actuator 21 (see FIG. 1), and is dynamically rotated in the rotational direction R2.

  As a result, unevenness is imparted to the surface of the tire member laminate 3 in the circumferential direction due to the convex portions 23 a and the concave portions 23 b provided on the peripheral portion of the preceding pressing roller 23. Specifically, the tire member laminated body 3 is provided with a temporary pressure-bonding portion 31 that is temporarily pressed by being pressed by the convex portion 23a of the preceding pressing roller 23 and a position corresponding to the concave portion 23b of the preceding pressing roller 23. A groove portion 32 is formed as a gap that is not in contact with the tire constituent member 2.

  At this time, since the preceding pressing roller 23 intermittently presses the tire member laminated body 3 by the convex portion 23a, the positional displacement of each tire constituent member 2 of the tire member laminated body 3 occurs or is in the displaced state. Occurrence of wrinkles due to pressing is suppressed.

  In addition, since the preceding pressing roller 23 is pressed by the second linear actuator 21 with the second pressure, the optimal pressing force can be set regardless of the first linear actuator 11 for pressing the main pressing roller 13. Thereby, each tire constituent member 2 can be temporarily pressure-bonded suitably, suppressing the position shift of each tire constituent member 2, and the occurrence of wrinkles.

  FIG. 3 is a front view of the tire member laminate 3, which is a view taken in the direction of arrow X in FIG. 2 and shows an aspect stitched by the preceding pressing roller 23 and the main pressing roller 13. As the moving body 8 moves in the stitching movement direction F, the main pressing roller 13 is pressed against the tire member laminate 3 by the first linear motion actuator 11 with the first pressure, and is driven in the rotational direction R1. To be rotated.

  As a result, a portion of the surface of the tire member laminate 3 that has been temporarily press-bonded by the preceding pressing roller 23 is pressed. At this time, by pressing the main pressing roller 13 at a first pressure higher than the second pressure, the temporary press-bonding portion 31 and the groove portion 32 formed between the tire constituent members 2 are pressed, and each tire constituent member 2 is It is preferably crimped.

  In addition, since each tire constituent member 2 is temporarily press-bonded by the temporary press-bonding portion 31 by the preceding pressing roller 23, when the main pressing roller 13 presses, displacement of each tire constituent member 2 is suppressed. Thus, the position-shifted portion is not pressed, and thus generation of wrinkles is suppressed.

  Furthermore, since the groove portion 32 is formed by the preceding pressing roller 23, the air interposed between the tire constituent members 2 can be efficiently discharged via the groove portion 32 when pressing by the main pressing roller 13.

  Therefore, according to the stitching device 1, the temporary press-bonding portion 31 is formed while the groove portion 32 as the air discharge groove is formed in the tire member laminated body 3 by the preceding pressing roller 23 prior to the main pressing roller 13. It is possible to suppress the displacement of each tire component 2 and the occurrence of wrinkles while efficiently discharging the air interposed between each tire component 2 by being pressed by the main pressing roller 13 following this. Thus, each tire component 2 can be suitably crimped.

  In addition, since the preceding pressing roller 23 is urged toward the molding drum 4 by the elastic member 26, it has good followability to the thickness variation in the circumferential direction of the tire member laminated body 3, and thereby more suitably. The tire member laminate 3 can be pressed.

  For example, when the sidewall member 2D is extruded from an extrusion molding machine (not shown), there is a possibility that the thickness S varies (see FIG. 2) due to variations in the extrusion speed and the supply amount of the material. According to the configuration, the thickness variation S can be suitably absorbed, and the preceding pressing roller 23 can be stably pressed toward the tire member laminate 3.

  Further, as shown in FIG. 4, the control device 50 controls the turning device 7 so that the preceding pressing roller 23 is pressed on the profile surface straightly according to the tire member laminated body 3 to be stitched. The temporary press-bonding part 31 and the groove part 32 by the preceding pressing roller 23 can be suitably formed. Thereby, the tire member laminated body 3 can be stitched suitably.

  Further, as the first linear actuator 11 and the second linear actuator 21, an actuator of a type that can freely set the advance / retreat positions of the first rod 12 and the second rod 22 may be adopted. In this case, the control device 50 controls the advance / retreat amounts of the first linear motion actuator 11 and the second linear motion actuator in correspondence with the profile surface shape of the tire member laminate 3 stored in the database. As a result, the main pressing roller 13 and the preceding pressing roller 23 can be pressed with an appropriate pressure while further following the profile surface, and stitching can be performed more suitably.

DESCRIPTION OF SYMBOLS 1 Stitching apparatus 2 Tire structural member 3 Tire member laminated body 4 Molding drum 5 Main press apparatus 6 Predecessor press apparatus 7 Turning apparatus 8 Moving body 11 1st linear motion actuator 13 Main press roller 21 2nd linear motion actuator 23 Prior press roller 23a Convex part 23b Concave part 25 Bearing part 26 Elastic member 31 Temporary pressure bonding part 32 Groove part 50 Control apparatus

Claims (5)

A green tire stitching device that presses the surface of a tire member laminate formed by laminating a plurality of tire constituent members wound around a peripheral portion of a molding drum to press the plurality of tire constituent members. And
A main pressing roller that is moved in the axial direction of the molding drum and pressed against the tire member laminate with a first pressure so that the plurality of tire constituent members are pressure-bonded to each other;
The tire member laminate having a plurality of convex portions on a peripheral portion, moved in the axial direction of the molding drum, and at a second pressure weaker than the first pressure, preceding the main pressing roller. A stitching device comprising: a pre-pressing roller that is pressed against the head. A first linear actuator that presses the main pressing roller against the tire member laminate;
The stitching device according to claim 1, further comprising: a second linear motion actuator that presses the preceding pressing roller against the tire member laminate.   The stitching device according to claim 2, wherein an elastic member is interposed between the preceding pressing roller and a second linear actuator.   The said preceding press roller is turnable with respect to the said axial direction of the said forming drum so that the surface of the said tire member laminated body may be pressed in plane, The Claim 1 WHEREIN: It is any one of Claims 1-3. Stitching device. A method for stitching green tires,
A plurality of tire constituent members are bonded to the periphery of the molding drum to form a tire member laminate,
By rotating the molding member around the axis, by rotating the tire member laminate around the axis,
While moving the main pressing roller in the axial direction of the molding drum, the plurality of tire constituent members are pressed against the tire member laminate with a first pressure so that the tire pressing members are pressed against each other.
The tire member lamination is preceded by the main pressing roller with a second pressure that is weaker than the first pressure while moving a preceding pressing roller having a plurality of convex portions on the peripheral portion in the axial direction of the molding drum. Stitching method characterized by pressing on the body.

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