JP2007083676A - Apparatus for joining tire member and tire molding apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To inhibit the occurrence of a defect such as m exfoliation by improving the joining strength of a joint section of tire members rolled around the periphery of a molding drum. <P>SOLUTION: A plurality of needlelike projections 15 are arranged at equal intervals and fixed on the pressing surface 11 of a pressure member 10 that carries out the pressing of a joint section 25 of a tire member 20. When joining the joint section 25, projections 15 are pressed against the joint section 25 while carrying out the pressing of the members and carrying out press-joining, the projections 15 are jammed into the tire member 20, the tire member 20 is deformed in the direction of pressing by pressure, to form thereby engaged sections 28 between the members. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a joining apparatus for pressing and joining tire constituent members wound around a molding drum in a molding process of a green tire (raw tire), and a tire molding apparatus including the joining apparatus and the molding drum. About.

  A pneumatic tire is generally formed into a predetermined shape by molding a green tire by combining various tire constituent members made of unvulcanized rubber or the like, and vulcanizing and molding the tire. Conventionally, a molding method using a cylindrical molding drum has been widely used in the green tire molding process. In this method, a green tire is formed by winding various tire constituent members such as a sheet-like or belt-like inner liner, a carcass ply, and a sidewall around the outer periphery of a cylindrical molding drum and bonding them together to form a cylinder. After being molded into a shape, the center portion is molded into a substantially toroidal shape.

  At the time of laminating the tire constituent members, in addition to adhering them together while removing the air between the tire constituent members, the seams between the end portions of the members that can be formed by making each tire constituent member cylindrical (hereinafter, It is necessary to join the joint part). Usually, for joining the joint portions, joining devices are used in which the joint portions of the tire constituent members are pressed from the outer periphery with various pressing members, and the members are pressure-bonded and joined using the viscosity of rubber.

  Although FIG. 3 is not described in the patent literature, a conventional joining apparatus (only the pressing member 10 is shown in the figure) and a joint part that crimp and join the joint part 25 of the tire constituent member 20 by such a method. 25 is an enlarged side view showing the joint 25 and the molding drum 2 in cross section.

  As shown in the figure, both end portions of the tire constituent member 20 are formed into tapered surfaces inclined with respect to the vertical direction, and are wound around the outer periphery of the cylindrical molding drum 2 so as to contact the tapered surfaces at both end portions. By making contact, a joint portion 25 in which both end portions of the tire constituent member 20 are overlapped is formed. Further, the tire constituent member 20 is formed by bonding two members 21 and 22, and the width of the joint portion 25 is twice as large as that of a single member.

  A plate-like pressing member 10 provided in the joining device is arranged on the outer side in the radial direction of the joint portion 25, and the conventional pressing member 10 can press the entire width of the joint portion 25 with one press. It is formed wider than the joint portion 25. The pressing surface 11 facing the joint portion 25 of the pressing member 10 is formed in a flat shape, and a layer of an elastic material such as urethane is provided on the surface thereof. The joining device further includes pressing means for the pressing member 10 including a piston / cylinder mechanism (not shown), and the pressing surface 11 of the pressing member 10 is pressed against the outer peripheral surface of the joint portion 25 by the pressing means. Press from the outer peripheral direction and press-bond.

  At this time, since the elastic material of the pressing surface 11 is deformed corresponding to the unevenness on the surface of the joint portion 25, the concave portion of the joint portion 25 can also be pressed, and the entire joint portion 25 can be crimped relatively uniformly. However, in this conventional joining device, the joint portion 25 is crimped only by the pressing pressure of the pressing surface 11 by the piston / cylinder mechanism, that is, the joint portion 25 is joined only by the viscosity of the rubber, so the joint strength of the joint portion 25 is high. When the pulling force such as when bulging into the above-described toroid is applied due to shortage, peeling may occur and a defect such as an open splice may occur in the joint portion 25. As a result, there is a fear that the quality of the product tire such as air pressure retention and durability may be deteriorated.

  Further, in addition to the plate-like pressing member 10 described above, a rollable cylindrical pressing member 10 provided with a layer of an elastic material such as urethane on the outer peripheral surface is provided, and the joint of the tire component member 20 is provided on the outer peripheral surface. A joining apparatus that presses and presses the portion 25 is known (see Patent Document 1).

  Similar to the joining apparatus shown in FIG. 3, this conventional joining apparatus includes a pressing means including a piston / cylinder mechanism and the like, and a tire in which the outer peripheral surface of the cylindrical pressing member 10 is wound around the outer periphery of the molding drum 2. While pressing against the joint portion 25 of the component member 20, the pressing member 10 is rolled along the joint portion 25, and the joint portion 25 is pressed and pressure bonded. Accordingly, even in the joining apparatus including the cylindrical pressing member 10, the joint portion 25 is joined by pressure-bonding the joint portion 25 only with the viscosity of rubber, as in the case of joining with the plate-like pressing member 10 described above. The joint strength of the joint portion 25 may be insufficient, and defects such as peeling or open splice may occur in the joint portion 25.

JP 2003-145642 A

  The present invention has been made in view of the above-described conventional problems, and its purpose is to increase the bonding strength of the joint portion of the tire constituent member wound around the outer periphery of the molding drum to cause defects such as peeling. Is to improve the quality of pneumatic tires.

The invention of claim 1 is a joining device that presses and joins a joint portion of a tire constituent member wound around an outer periphery of a molding drum, and has a plurality of protrusions on a pressing surface that presses the joint portion of the tire constituent member. And a pressing member that presses the pressing surface of the pressing member against the joint portion of the tire constituent member, and presses and joins the joint portion of the tire constituent member with the protrusion of the pressing member. It is characterized by that.
According to a second aspect of the present invention, in the tire component joining apparatus according to the first aspect, the protrusion is formed in a needle shape that becomes narrower toward the tip.
According to a third aspect of the present invention, in the tire constituent member joining apparatus according to the first or second aspect, the protrusions are arranged at equal intervals on the pressing surface of the pressing member.
According to a fourth aspect of the present invention, in the tire component joining apparatus according to any one of the first to third aspects, the pressing surface of the pressing member is formed to be a flat surface or a curved surface.
According to a fifth aspect of the present invention, in the tire constituent member joining apparatus according to any one of the first to third aspects, the pressing member is a roll-shaped member that can freely roll, and the pressing surface is the roll. It is an outer peripheral surface of a shaped member, and is characterized by pressing the joint portion of the tire constituent member with the outer peripheral surface while rolling.
A sixth aspect of the present invention is the tire component joining apparatus according to any one of the first to fifth aspects, wherein the pressing means presses the projection of the pressing member against the joint portion of the tire constituent member. Is adjustable.
A seventh aspect of the present invention is a tire molding apparatus that molds a green tire by combining tire constituent members, and is a molding drum that winds the tire constituent members around an outer periphery, and is described in any one of the first to sixth aspects. And a joining device for tire constituent members.

(Function)
According to the present invention, the end of the tire constituent member is pressed while the joint portion of the tire constituent member wound around the outer periphery of the molding drum is pressed by the plurality of protrusions provided on the pressing member, and the air of the joint portion is released. Join each other. At this time, the pressing pressure of the pressing member to the joint portion is concentrated on the tip portion of the protrusion, and the pressing force at each tip portion is increased to firmly press-join the joint portion. At the same time, the joint strength of the joint portion is increased by deforming the tire constituent member of the joint portion with the protrusions in the pressing direction so that the end portion of one tire constituent member bites into the other end portion.

  According to the present invention, since the plurality of protrusions are provided on the pressing surface of the pressing member that presses and joins the joint portions of the tire constituent members, and the joint portions are pressed at the tip portions, the pressing force at each tip portion is increased. The joint part can be firmly crimped. At the same time, the joint strength of the joint portion can be increased by, for example, deforming the tire constituent member of the joint portion in the pressing direction and causing the end portion of one tire constituent member to bite into the other end portion. As a result, it is possible to suppress the occurrence of defects such as peeling at the joint portion of the tire constituent member, and the quality of the pneumatic tire can be improved.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
The tire molding apparatus of the present embodiment includes a joining device for pressing and joining a joint portion of a tire constituent member wound around the outer periphery of the molding drum with a pressing member, similar to the conventional joining device shown in FIG. . However, this joining device is different from the conventional joining device in that a plurality of protrusions are provided on the pressing surface of the pressing member that presses the joint portion, and the protrusion is pressed to join the joint portion by pressing. .

FIG. 1 is a schematic view showing a main part of the tire molding apparatus 1 of the present embodiment, FIG. 1A is a front view as seen from the radial direction of the molding drum 2, and FIG. 1B is as seen from the axial direction of the molding drum 2. FIG.
As shown in the figure, the tire molding apparatus 1 includes a molding drum 2 that winds a tire constituent member around an outer peripheral surface, a joining device 3 that presses and joins a joint portion of the tire constituent member, and the like.

  The molding drum 2 has a substantially cylindrical shape, is rotated around an axis line by a driving unit (not shown), and is formed into a cylindrical shape by sequentially winding and laminating tire constituent members on the outer periphery. The outer peripheral surface is composed of a plurality of segments divided in the circumferential direction, and inside the molding drum 2, for example, a piston / cylinder for moving each segment in the radial direction to increase or decrease the outer diameter. Well-known means using a mechanism or the like is provided. As a result, the molding drum 2 winds the tire constituent member in a state in which the outer peripheral surface is enlarged and forms it into a cylindrical shape, reduces the diameter of the outer peripheral surface and releases the restraint of the molded tire constituent member, not shown. It is moved in the axial direction by the conveying means and removed from the outer peripheral surface.

  The tire constituent member of the present embodiment is a sheet-like or belt-like member made of unvulcanized rubber such as an inner liner, a carcass ply, and a sidewall, and is about 5 mm by a molding machine such as an extruder. After being continuously formed to a thickness, it is formed by cutting to a predetermined dimension. The tire molding apparatus 1 according to the present embodiment supplies the tire constituent member to the molding drum 2 by a supply device (not shown), winds the tire constituent member one by one or a plurality of sheets around the molding drum 2, and presses the joint portion by the joining device 3. After joining, the next tire structural member is piled around the outer periphery and wound to join the joint part, and the same procedure is repeated a plurality of times to form a cylindrical molded body. Both end portions of the tire constituent member are formed substantially parallel to the axial direction of the molding drum 2 or inclined at a predetermined angle with respect to the axial direction. Therefore, the extending direction of the joint portion is also in the drum axial direction. They are formed substantially parallel or inclined at a predetermined angle.

  The joining device 3 includes a pressing member 10 that presses a joint portion of a tire constituent member provided above the molding drum 2, and a pressing unit that presses the pressing surface 11 of the pressing member 10 against the joint portion.

  The pressing member 10 has a plate shape having a substantially rectangular shape as viewed from above, that is, a planar shape, and has a length in a direction parallel to the axial direction of the molding drum 2 as shown in FIG. A predetermined length shorter than the axial length is formed. The pressing surface 11 of the pressing member 10 facing the molding drum 2 is formed in a flat shape, and a plurality of protrusions 15 extending in a perpendicular direction (downward in the drawing) are fixed to the surface like a sword mountain, for example. ing. Each protrusion 15 is formed in a needle shape, that is, a shape that becomes narrower toward the tip, such as an elongated conical shape or a pointed bar shape, and the pressing surface 11 is equidistantly spaced by a predetermined interval. Has been placed.

  The pressing means holds the pressing surface 11 of the pressing member 10 so as to face the molding drum 2, and moves the pressing member 10 in the radial direction of the molding drum 2 in the state (arrow S direction in the figure). It is a means to press the protrusion 15 of the pressing surface 11 against the joint part of the tire constituent member.

  In this embodiment, for example, a piston / cylinder mechanism (only the piston rod 18 is shown) is used as the pressing means, and the tip of the piston rod 18 is fixed to the approximate center of the upper surface of the pressing member 10. The piston / cylinder mechanism is installed such that the axis is parallel to the radial direction of the molding drum 2 and the piston rod 18 is directed toward the center line of the molding drum 2 to move the pressing member 10 in the direction of arrow S. Then, the protrusion 15 of the pressing surface 11 is pressed against the joint portion. The joining device 3 of the present embodiment can arbitrarily set the pressure for pressing the projection 15 against the joint part by adjusting the pressure such as air pressure or hydraulic pressure for driving the piston / cylinder mechanism. .

  Moreover, the joining apparatus 3 includes a moving unit (not shown) that moves the pressing member 10 in parallel with the axial direction of the molding drum 2 (the direction of the arrow T in FIG. 1A). For example, this moving means moves the pressing member 10 in the direction of arrow T by attaching the piston / cylinder mechanism to a frame that can be moved by a motor or the like on a rail laid parallel to the axial direction of the molding drum 2. Let

  The joining device 3 is configured as described above and joins the pressing surface 11 of the pressing member 10 against the joint portion of the tire constituent member wound around the molding drum 2 by the pressing means. At this time, pressure is concentrated on the sharp tip portions of the plurality of protrusions 15 on the pressing surface 11, and the joint portion is pressed from the outer peripheral surface to be bonded by pressure bonding. At the same time, the protrusion 15 is bitten into the tire constituent member, and the tire constituent member of the joint portion is deformed in the pressing direction. The joining device 3 combines the movement by the moving means and the rotation of the molding drum 2 to move the pressing member 10 along the joint portion, and repeatedly performs the pressing by the pressing member 10 along the joint portion. Join the parts over their entire length.

  Here, each dimension of the pressing member 10 (pressing surface 11) is set so that the joint part can be appropriately pressed according to the dimension of the joint part to be pressed, the extending direction, and the like. Specifically, the tire components of the joint part are pressed so that the overlapping part can be pressed at a time so that it is wider than the overlapping part and sufficient pressing force is ensured. The area of the surface 11 is determined. In addition, the arrangement interval, dimensions, shape, etc. of the protrusions 15 are set to an appropriate pressure and pressure so that the joint strength of the joint portion by pressing is sufficiently high according to the thickness of the tire constituent member to which the joint portion is joined. Decide to be density etc.

  In addition, you may form each protrusion 15 in the other shape which becomes thin toward the front-end | tip, such as an elongate triangular pyramid, a quadrangular pyramid shape, or a wedge shape. Alternatively, similar to the needle shape described above, pressure can be concentrated on the tip of the protrusion 15 to press the joint portion, and the protrusion 15 is bitten into the tire constituent member to press the tire constituent member of the joint portion in the pressing direction. If it can be deformed, it may be formed in a shape other than a pointed tip, such as a tip or a curved surface. Further, the pressing surface 11 of the pressing member 10 is formed in a curved surface other than the above-described plane, for example, formed in an arc shape corresponding to the shape of the joint portion to be pressed, and the entire joint portion is joined more uniformly. Also good.

Next, the state of the joint portion when the joint portion of the tire constituent member is joined by the joining device 3 will be described.
2 is an enlarged cross-sectional view showing the joint portion 25 of the tire constituent member 20 to be joined by the joining device 3, FIG. 2A is before pressing by the pressing member 10, FIG. 2B is during pressing, and FIG. 2C is after pressing. It is sectional drawing of each state.

  As shown in FIG. 2A, both end portions of the tire constituent member 20 are formed on tapered surfaces inclined with respect to the vertical direction, and are wound around the outer periphery of the molding drum 2 so as to contact the tapered surfaces of both end portions. Thus, the joint portion 25 in which both end portions of the tire constituent member 20 are overlapped is formed. The tire constituent member 20 is formed by bonding two members 21 and 22, and the width of the joint portion 25 is twice that of a single member. Further, as described above, the pressing member 10 disposed outside the joint portion 25 is wider than the width of the joint portion 25 so that the joint portion 25 can be pressed at a time.

  When the pressing member 10 is moved toward the molding drum 2 and the protrusion 15 on the pressing surface 11 is pressed against the joint portion 25 of the tire constituent member 20 with a predetermined pressure from the outer peripheral side (upper side in the figure), it is shown in FIG. 2B. Thus, the front-end | tip part of the protrusion 15 bites into the tire structural member 20 (outer layer member 21), and the outer layer member 21 is pushed centering on a pressing direction (downward direction in the figure), and deform | transforms into a concave shape. With the pressure of this deformation, the contact surface 23 of the outer layer member 21 with the inner layer member 22 protrudes and deforms in the pressing direction, and the outer layer member 21 forms a biting portion 28 that bites into the inner layer member 22. Similarly, members 21 and 22 on the outer peripheral side (upper side in the drawing) of the joint portion 25 also protrude in the pressing direction, and bite into the members 21 and 22 on the inner peripheral side (lower side in the drawing) to form the biting portion 28.

  The predetermined pressure for pressing the protrusion 15 against the joint portion 25 is sufficient depending on the thickness of the tire constituent member 20 (each member 21, 22) and the number, size, shape, and the like of the protrusion 15 arranged. An appropriate pressure is set such that a pressing force can be obtained and the protrusion 15 penetrates the tire constituent member 20 so as not to form a through hole.

  Thereafter, when the pressing member 10 is moved toward the outer side in the radial direction of the molding drum 2 and separated from the tire constituent member 20, as shown in FIG. 2C, the protrusion 15 is formed on the outer peripheral surface of the tire constituent member 20. The press marks 30 that are deformed into a concave shape by pressing the tip are formed at intervals according to the arrangement interval of the protrusions 15. Each pressing mark 30 is formed in a needle shape corresponding to the shape of the protrusion 15 and gradually becomes narrower from the opening 31 on the surface of the tire constituent member 20 toward the tip 32 on the lower side in the thickness direction. Further, the biting portions 28 between the members formed in the respective portions of the tire constituent member 20 described above also remain.

  In the joining device 3 of the tire constituent member 20 of the present embodiment, the tire constituent member 20 of the joint portion 25 is pressed by the projection 15 at the time of the above pressing, and the air between the members 21 and 22 and the air of the joint portion 25 is extracted. However, they are bonded together by pressure bonding. At this time, the pressing pressure of the pressing member 10 is concentrated on the protrusions 15 and the pressing pressure is appropriately set, and the tire component member 20 is pressed with sufficient force to be firmly pressed, and the members 21, 22 are pressed. And the joint strength of the joint part 25 is improved. The bonding strength by this crimping is highest around the portion pressed by the protrusions 15, but the tire constituent members 20 in the meantime are applied to the lower tire constituent members 20 in a state where they are subjected to tension by the protrusions 15 arranged. Since it is pressed, it is pressure bonded sufficiently firmly.

  Furthermore, in this joining apparatus 3, in addition to the above-described pressure bonding by the viscosity of rubber, the members 21 and 22 and the joint portion 25 are formed with biting portions 28 between the members, and against the force to peel them off. Increase resistance. Thereby, the joining strength of the joint part 25 is made higher than in the case of joining only by pressure bonding as in the conventional joining apparatus of FIG. 3 described above.

  Note that, in the thin portions such as the vicinity of the tip end portions of the tapered surfaces at both ends of the tire constituent member 20, the protrusions 15 may penetrate the tire constituent member 20 and form through holes when pressed. However, even in this case, the member in the vicinity of the through hole protrudes in the pressing direction and bites into the member in the same direction due to the pressure in the pressing direction accompanying the biting of the protrusion 15. Therefore, although the pressure-bonding area between the members is reduced by the amount of the through-holes formed, the effect of improving the joining strength by biting is exhibited and the joining strength of other parts is improved, so that the joint part 25 as a whole is joined. The strength is higher than the conventional joining only by pressure bonding.

  The tire molding apparatus 1 according to the present embodiment molds a green tire having a predetermined shape by sequentially repeating the winding of the tire constituent member 20 around the molding drum 2 and the joining of the joint portion 25 by the joining apparatus 3. . After that, the green tire is conveyed to a vulcanization molding device by a conveyance device (not shown), inserted into a vulcanization mold and vulcanized at a predetermined temperature, and pressure is applied in the mold to configure each tire. The member 20 is integrated and molded, and a product tire having a predetermined shape is manufactured. At the time of this vulcanization molding, the pressing marks 30 of the joint portion 25 formed by pressing by the protrusions 15 are crushed and disappear, so that there is no defect in the product tire.

  As described above, in the tire molding device 1 according to the present embodiment, since the plurality of protrusions 15 are provided on the pressing surface 11 of the pressing member 10 that presses and joins the joint portion 25 of the tire constituent member 20, the pressing member 10. The pressing pressure can be concentrated on the protrusion 15 and the pressing pressure can be arbitrarily set. Therefore, the joint portion 25 can be pressed with an appropriate force. Thereby, the members can be firmly bonded to each other, and the joint strength of the joint portion 25 can be increased.

  In addition to this pressure bonding, since the biting portion 28 is formed between the members of the joint portion 25 by the pressure accompanying the biting of the protrusion 15 into the tire constituent member 20, the resistance to the force to peel them off Can be further increased. As a result, the joint strength of the joint portion 25 is higher than that in the case of joining only by crimping, and the occurrence of defects such as peeling in the joint portion 25 is suppressed. Quality can be improved.

  In addition to the plate-shaped pressing member 10, for example, the bonding device 3 of the present embodiment is formed in a cylindrical shape or a columnar shape, or a curved shape corresponding to the outer peripheral shape of the joint portion 25. For example, a roll-shaped pressing member 10 that can roll on the joint portion 25 may be provided. In this case, the outer peripheral surface of the roll-shaped pressing member 10 is the pressing surface 11, and a plurality of protrusions 15 extending in the radial direction are arranged and fixed at predetermined intervals. When the joint portion 25 is joined, the pressing member 10 is rolled along the joint portion 25 and continuously joined while pressing the outer peripheral surface (pressing surface 11).

(Joint test of joint part)
In order to confirm the effect of the tire molding apparatus 1, as described above, the tire constituent member 20 (hereinafter referred to as an “implemented product”) joined with the joint portion 25, and the conventional pressing member 10, that is, the protrusion 15 on the pressing surface 11. A tire constituent member 20 (hereinafter referred to as a conventional product) in which the joint portion 25 is pressed and joined with a plate-like pressing member 10 (see FIG. 3) having no joint, and the joint strength of the joint portion 25 was compared.

  The tire constituent member 20 to be joined in both the actual product and the conventional product is two types of sheet-like inner liners having a thickness of 5.4 mm and 4.5 mm. The joint part 25 was joined. Each implementation product was joined by pressing the joint portion 25 with the pressing member 10 (see FIG. 2B) in which a plurality of needle-like protrusions 15 having a length of 3 mm were provided on the pressing surface 11.

  The comparison of joining strength was performed by creating test pieces each including the joint portion 25 from the tire constituent member 20 after joining, and conducting a tensile test. The tensile test was evaluated by extending each test piece having a width of 50 mm × 100 mm by a tensile tester (manufactured by Shimadzu Corporation, Autograph S-500 (trade name)) by 200%. As a result, while a gap (peeling) occurred in the joint portion 25 of the conventional product, no gap was observed in the implemented product, and the joint strength of the joint portion 25 of the tire constituent member 20 is improved by the present invention. It was proved.

It is a schematic diagram which shows the principal part of the tire shaping | molding apparatus of this embodiment. It is sectional drawing which expands and shows the joint part of the tire structural member joined by the joining apparatus of this embodiment. It is a partial cross section side view which expands and shows the conventional joining apparatus (pressing member) and a joint part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Tire molding apparatus, 2 ... Molding drum, 3 ... Joining apparatus, 10 ... Pressing member, 11 ... Pressing surface, 15 ... Projection, 18 ... Piston rod, DESCRIPTION OF SYMBOLS 20 ... Tire component member, 21 ... Outer layer member, 22 ... Inner layer member, 25 ... Joint part, 28 ... Biting-in part, 30 ... Press mark, 31 ... Opening part, 32 ... tip part.

Claims (7)

A joining device that presses and joins a joint portion of a tire constituent member wound around an outer periphery of a molding drum,
A pressing member having a plurality of protrusions on a pressing surface that presses the joint portion of the tire constituent member; and
Pressing means for pressing the pressing surface of the pressing member against the joint portion of the tire constituent member,
A joining device for a tire constituent member, wherein the joint of the tire constituent member is pressed and joined with the projection of the pressing member. In the joining apparatus of the tire structural member described in Claim 1,
An apparatus for joining tire constituent members, wherein the protrusion is formed in a needle shape that becomes narrower toward the tip. In the joining apparatus of the tire structural member described in Claim 1 or 2,
A joining apparatus for tire constituent members, wherein the protrusions are arranged at equal intervals on a pressing surface of the pressing member. In the joining apparatus of the tire structural member according to any one of claims 1 to 3,
A joining device for tire constituent members, wherein a pressing surface of the pressing member is formed into a flat surface or a curved surface. In the joining apparatus of the tire structural member according to any one of claims 1 to 3,
The pressing member is a roll-shaped member that can freely roll,
The pressing surface is an outer peripheral surface of the roll-shaped member;
An apparatus for joining tire constituent members, wherein the joint portion of the tire constituent members is pressed by the outer peripheral surface while rolling. In the joining apparatus of the tire structural member according to any one of claims 1 to 5,
The apparatus for joining tire constituent members, wherein the pressing means is capable of adjusting a pressure for pressing the protrusions of the pressing member against a joint portion of the tire constituent members. A tire molding apparatus for molding a green tire by combining tire constituent members,
A molding drum for winding the tire component around the outer periphery;
A tire molding apparatus comprising: the tire constituent member joining apparatus according to claim 1.

Images