JP2002331525A - Method for producing tire and mold for vulcanizing/ molding tire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mold a tire having a tread in which land parts on both sides of a channel are connected to each other by a connection element to form a connection part communicating in the longitudinal direction of the channel with a channel bottom without cutting the connection element. SOLUTION: When a green tire is packed in a mold 10 and expanded while the tip of the projected part 26A of the first rotation member 26 and the tip of the projected part 46A of the second rotation member 46 are made to contact each other in a recessed part 20 for forming the connection part, unvulcanized rubber 50 is adhered to a tread forming surface 12. After vulcanization, when the tire is removed from the mold 10, as shown in Fig. 5(B), the connection element 102 for connecting blocks to each other presses the projected part 26A and the projected part 46A to rotate them in the arrow direction. The tip of the projected part 26A and the tip of the projected part 46A are separated from each other, and the connection element 102 is drawn out through the clearance between the tips without being cut.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for manufacturing a tire,
And a tire having a tread in which land portions on both sides of a groove are connected to each other by a connection element so as to provide a communication portion communicating with the groove bottom in the longitudinal direction of the groove. The present invention relates to a method for producing a tire that can be molded without cutting, and a mold for tire vulcanization molding.

[0002]

2. Description of the Related Art In order to increase the rigidity of a block defined by a plurality of grooves, as shown in FIG. 7, a tire manufacturing method for manufacturing a tire in which adjacent blocks 100 are connected by bridge-like connecting elements 102. Has been proposed.

For example, in Japanese Patent Application Laid-Open No. H11-268050, a mold is provided with a main body for forming a groove of a tire, and one or more cannook-like parts for forming a communication portion below a connecting portion. The tire can be released from the mold without removing the part and damaging the connection groove.

In addition, the main body forming the groove of the tire can be divided in the width direction, and at least one of the divided parts moves in the releasing direction at the time of releasing the tire without damaging the connecting groove. Some tires can be released.

[0005]

However, in Japanese Patent Application Laid-Open No. Hei 11-268050, an external driving means is required for inserting and removing the kanuki, and there is a problem that the entire configuration of the mold is complicated and the cost is increased. In addition, since it can be installed only in a place where the driving means can be easily obtained, there are significant restrictions on the installation place and the orientation of the device.

In other cases, it is difficult to obtain a mold release path for securing the cross-sectional area and shape of the connecting groove.
In addition, since the mold release path has an uneven shape narrower than that of the connection groove, there is a high possibility that the connection groove is damaged (cut) when the connection groove is released.

The present invention has been made in view of the above circumstances, and has as its object to provide a tire manufacturing method and a tire vulcanizing mold that does not use a driving means and does not complicate the structure of the mold.

[0008]

According to a first aspect of the present invention, there is provided a tread in which land portions on both sides of a groove are connected by connecting elements so as to provide a communication portion communicating with the groove bottom in the longitudinal direction of the groove. A method for manufacturing a tire, comprising: molding a tire having a mold by using a mold, wherein a rib-shaped protrusion for forming the groove and a land portion formed on both sides of the rib-shaped protrusion for forming the land portion are provided. The rib-shaped projection, the land-shaped recess formed on the rib-shaped projection and the other land-formed recess formed by connecting the land-shaped recess and the land-shaped recess formed from the top surface of the rib-shaped projection toward the base. The tread forming surface is provided with a connecting portion forming concave portion that opens to the front, and a movable portion provided on the rib-shaped protrusion and provided so as to be able to protrude from one side surface to the other side surface of the connecting portion forming concave portion. Into the mold, project into the connection part forming recess A raw tire is loaded in a state in which the tip of the movable portion is in contact with the other side surface, and thereafter, the tread of the raw tire is brought into close contact with the tread forming surface, and vulcanization is performed. By separating the tread from the tread forming surface and pressing the movable portion with a connecting element formed by the connecting portion forming recess, the tip of the movable portion protruding into the connecting portion forming recess is moved to the other end. The connecting element is pulled out without being cut through a gap formed between the front end and the other side surface.

In the method for manufacturing a tire according to the first aspect,
First, a raw tire is loaded into a mold in a state where the tip of the movable portion protruding from the concave portion for forming the connection portion is in contact with the other side surface.

Thereafter, vulcanization is performed by bringing the tread of the green tire into close contact with the tread forming surface. The rubber of the tread penetrates into the connecting portion forming recess by bringing the tread of the raw tire into close contact with the tread forming surface. In addition, by the movable portion whose tip is in contact with the other side of the connection portion forming recess,
A connecting element communicating in the longitudinal direction of the groove can be formed.

Next, when the tread of the vulcanized tire is separated from the tread forming surface, the connecting element formed by the connecting portion forming recess presses the movable portion, and the tip of the movable portion separates from the other side surface. Thus, a gap is formed between the tip and the other side. Since the connecting element is pulled out through the gap, the vulcanized tire can be taken out of the mold without cutting the connecting element.

According to a second aspect of the present invention, in the tire manufacturing method according to the first aspect, the movable portion includes a plurality of convex portions extending radially around a rotation axis provided on the rib-shaped protrusion. A rotating member rotatable around the rotating shaft, and a state in which the rotating member is allowed to rotate only in a direction in which a connecting element is pulled out, and a tip of one of the protrusions is in contact with the other side surface. And vice versa, and vulcanizing the raw tire in a state where the tip of one of the convex portions is in contact with the other side surface, and vulcanization is performed. After the vulcanization, the connecting element formed by the connecting portion forming concave portion presses the convex portion to rotate the rotating member, and the tip of the convex portion protruding into the connecting portion forming concave portion to the other end. Separate from the side, the convex It is characterized in that drawn without the coupling element cutting through the gap formed between the tip and the other side surface.

[0013] In the tire manufacturing method according to the second aspect,
The raw tire is vulcanized while the tip of one convex portion is in contact with the other side surface of the concave portion for forming a connecting portion.

After vulcanization, the formed connecting element presses the convex portion to rotate the rotating member so that the distal end of the convex portion is separated from the other side surface, and the gap between the distal end of the convex portion and the other side surface is formed. The connecting element is pulled out without being cut through the gap formed in the connecting element.

By the action of the rotation control means, the rotation member rotates only in the direction in which the connecting element is pulled out, does not rotate in the opposite direction, and maintains the rotation position with the tip abutting on the other side. Is possible.

Therefore, even when a raw tire is loaded in a state where the tip of the projection is in contact with the other side surface of the connection portion forming recess, the projection does not move, and the tip of the projection contacts the other side surface. State can be maintained.

According to a third aspect of the present invention, in the tire manufacturing method according to the first aspect, the movable portion is provided on one side surface of the connecting portion forming recess of the rib-shaped projection. A plurality of first extending radially about the rotation axis of
A first rotating member having a convex portion and being rotatable about the first rotating shaft; and a second rotating shaft provided on the other side surface of the connecting portion forming concave portion of the rib-like projection. A second rotating member including a plurality of second convex portions extending in a radial direction and rotatable about the second rotating shaft; and rotating the first rotating member only in a direction in which the coupling element is pulled out. A first rotation control means for allowing the rotation position of the first rotating member while allowing the tip of the first projection to abut the tip of the second projection; And allowing the rotation of the second rotating member only in the direction in which the connecting element is pulled out, and the tip of one of the second protrusions is
A second rotation control means for holding a rotation position of the second rotating member in a state of contacting a tip of the first projection, and a tip of one of the first projections The raw tire is vulcanized in a state in which the raw tire is brought into contact with the tip of one of the second convex portions, and after vulcanization, the connecting element formed by the concave portion for forming the connecting portion forms the first convex portion. The first and second rotating members are rotated by pressing the portion and the second convex portion, and the tip of the first convex portion protruding into the coupling portion forming concave portion and the second The tip of the second projection is separated from the tip of the second projection, and the connection element is pulled out without cutting through the gap formed between the tip of the first projection and the tip of the second projection. It is characterized by:

[0018] In the tire manufacturing method according to the third aspect,
Vulcanization of the raw tire is performed in a state where the tip of one first projection is in contact with the tip of the other second projection.

After vulcanization, the formed connecting element presses the first convex portion and the second convex portion to rotate the first rotating member and the second rotating member. The distal end of the portion and the distal end of the second convex portion are separated from each other, and the connecting element is not cut through the gap formed between the distal end of the first convex portion and the distal end of the second convex portion. Drawn out.

The first rotation member rotates only in the direction in which the connecting element is pulled out by the operation of the first rotation control means, does not rotate in the opposite direction, and has a tip at the tip of the second projection. The rotational position can be held in a state in which the rotational position abuts.

Further, the second rotation member rotates only in the direction in which the connecting element is pulled out by the operation of the second rotation control means, does not rotate in the opposite direction, and has a tip at the tip of the first projection. The rotational position can be held in a state in which the rotational position abuts.

Therefore, even if the raw tire is loaded with the tip of the first projection contacting the tip of the second projection, the first
And the second convex portion does not move, and the state in which the distal end of the first convex portion is in contact with the distal end of the second convex portion can be maintained.

According to a fourth aspect of the present invention, there is provided a tire vulcanization molding mold, wherein a rib-like projection for forming a groove in the tread and a land portion provided on both sides of the rib-like projection for forming a land portion in the tread. A concave portion for forming, and a concave portion for forming one land portion and a concave portion for forming another land portion provided on the rib-shaped projection are connected to each other, and the top surface is formed from a top surface side of the rib-shaped projection toward a base portion side. A connecting portion forming concave portion that opens to the side, a rotating member that includes a plurality of convex portions that extend in a radial direction about a rotation axis provided on the rib-shaped protrusion, and is rotatable about the rotation axis, and a connection element. Rotation control means that allows the rotation of the rotation member only in the direction in which the rotation member is pulled out, and that can hold the rotation position of the rotation member in a state where the tip of one of the protrusions is in contact with the other side surface. It is characterized by having.

Next, the operation of the tire vulcanizing mold according to claim 4 will be described.

First, a raw tire is loaded into a mold in a state in which the tip of the protrusion protruding from the connection portion forming recess is in contact with the other side surface.

Thereafter, vulcanization is performed by bringing the tread of the green tire into close contact with the tread forming surface.

When the tread of the raw tire is brought into close contact with the tread forming surface, the rubber of the tread enters the concave portion for forming the connection portion.

Further, a connecting element that communicates in the longitudinal direction of the groove can be formed by the protruding part whose tip is in contact with the other side of the connecting part forming concave part.

Next, when the tread of the tire after vulcanization is separated from the tread forming surface, the connecting element formed by the connecting portion forming concave portion presses the convex portion, and the tip of the convex portion separates from the other side surface. Then, a gap is formed between the tip of the projection and the other side surface.

Since the connecting element is drawn out through this gap, the vulcanized tire can be taken out of the mold without cutting the connecting element.

According to a fifth aspect of the present invention, in the tire vulcanization molding mold according to the fourth aspect, a tip of the convex portion is formed in a substantially arc shape.

Next, the operation of the tire vulcanizing mold according to the fifth aspect will be described.

Since the tip of the projection is formed in a substantially arc shape,
When the connecting portion presses the convex portion and passes through the gap between the tip of the convex portion and the other side surface, a sharp portion is not pressed against the connecting portion, and it is possible to prevent damage to the connecting portion. I can do it.

According to a sixth aspect of the present invention, there is provided a tire vulcanization molding mold, wherein a rib-like projection for forming a groove in the tread, and a land portion provided on both sides of the rib-like projection for forming a land portion in the tread. A concave portion for forming, and a concave portion for forming one land portion and a concave portion for forming another land portion provided on the rib-shaped projection are connected to each other, and the top surface is formed from a top surface side of the rib-shaped projection toward a base portion side. And a plurality of first projections extending radially around a first rotation axis provided on one side of the connection-forming recess of the rib-shaped projection. A first rotating member rotatable about the first rotating shaft, and a radial direction about a second rotating shaft provided on the other side of the connecting portion forming recess of the rib-shaped projection. A plurality of second protrusions extending around the second rotation axis. A rotatable second rotating member and the first rotating member are allowed to rotate only in a direction in which the connecting element is pulled out, and the tip of one of the first convex portions is formed of the second convex portion. First rotation control means for holding a rotation position of the first rotation member in a state in which the first rotation member is in contact with the tip;
The second rotation member is allowed to rotate only in the direction in which the connecting element is pulled out, and the second projection is formed in a state where the tip of one second projection is in contact with the tip of the first projection. And a second rotation control means capable of holding the rotational position of the rotating member.

Next, the operation of the tire vulcanizing mold according to claim 6 will be described.

In the method for manufacturing a tire according to the sixth aspect,
Vulcanization of the raw tire is performed in a state where the tip of one first projection is in contact with the tip of the other second projection.

After vulcanization, the formed connecting element presses the first convex portion and the second convex portion, thereby rotating the first rotating member and the second rotating member, respectively, thereby forming the first convex portion. The distal end of the portion and the distal end of the second convex portion are separated from each other, and the connecting element is not cut through the gap formed between the distal end of the first convex portion and the distal end of the second convex portion. Drawn out.

The first rotation member rotates only in the direction in which the connecting element is pulled out by the action of the first rotation control means, does not rotate in the opposite direction, and has a tip at the tip of the second projection. The rotational position can be held in a state in which the rotational position abuts.

The second rotation member rotates only in the direction in which the connecting element is pulled out by the operation of the second rotation control means, does not rotate in the opposite direction, and has a tip at the tip of the first projection. The rotational position can be held in a state in which the rotational position abuts.

Therefore, even if a raw tire is loaded with the tip of the first projection contacting the tip of the second projection, the first
And the second convex portion does not move, and the state in which the distal end of the first convex portion is in contact with the distal end of the second convex portion can be maintained.

According to a seventh aspect of the present invention, in the tire vulcanization molding mold according to the sixth aspect, the tip of the first projection and the tip of the second projection are each formed in a substantially arc shape. It is characterized by being.

Next, the operation of the tire vulcanizing mold according to claim 7 will be described.

Since the distal end of the first convex portion and the distal end of the second convex portion are each formed in a substantially arc shape, the connecting portion presses the first convex portion and the second convex portion, and the first convex portion and the second convex portion are pressed. When passing through the gap between the tip of the portion and the tip of the second convex portion, the sharp portion is not pressed against the connecting portion, and damage to the connecting portion can be prevented.

[0044]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 1 to 3, a tread forming surface 12 of a mold 10 for vulcanizing a pneumatic tire.
Is provided with a rib-like projection 14 for forming a groove in the tread of the pneumatic tire.

As shown in FIG. 2, on both sides of the rib-like projections 14, land portion forming recesses 16 and 18 for forming blocks (or ribs) on the tread are formed.

As shown in FIG. 1 to FIG.
4, a connecting portion is formed from the top surface side of the rib-shaped projection 14 to the base side (groove bottom side) so as to connect the one land portion forming concave portion 16 and the other land portion forming concave portion 18. Recess 20
Are formed. (First Rotary Member) The rib-shaped projection 14 has a first rotary member storage recess 22 formed on one side surface of the coupling portion forming recess 20, and an opening of the first rotary member storage recess 22. A first rotation shaft 24 is rotatably supported in the vicinity.

The first rotating shaft 24 has a first rotating member 26
Are integrally formed.

The first rotating member 26 is housed in the first rotating member housing recess 22.

The first rotating member 26 has a first rotating shaft 24
Are provided, four protrusions 26A extending radially from the center are provided, and by rotating the first rotating member 26, any one of the protrusions 26A faces inward of the connection portion forming recess 20. It can protrude from the side surface 20A of the connecting portion forming recess 20. The tip of each projection 26A is formed in a semicircular shape.

Further, as shown in FIG.
4 is provided integrally with a cam 25 having four inclined surfaces 28 formed at equal intervals in the circumferential direction.

The cam 25 has a stepped portion 30 extending in the radial direction between the inclined surfaces 28. The cam 30 has a radially inner end of the stepped portion 30 and a radially inner end of the inclined surface 28. A hemispherical concave portion 32 is formed at the intersection of.

A hole 36 is formed in the rib-shaped projection 14 so as to open to a shaft hole 34 for supporting the first rotating shaft 24.
A stopper 38 having a hemispherical tip and a spring 40 are housed inside the hole 36.

The spring 40 connects the stopper 38 to the cam 2.
The distal end of the stopper 38 is pressed against the outer peripheral portion of the cam 25.

When the stopper 38 is engaged with the hemispherical concave portion 32, the stopper 38 comes into contact with the step 30, so that the rotation of the first rotating member 26 in the direction of the arrow CCW is prevented.

On the other hand, when the first rotating member 26 receives a rotating force in the direction opposite to the direction of the arrow CCW, the stopper 3
8 slides on the inclined surface 28 (at this time, the spring 40 contracts), and allows rotation in the direction opposite to the arrow CCW direction.

When the stopper 38 rides over the step 30, the click feeling is obtained by engaging with the hemispherical concave portion 32. When the tip of the stopper 38 is engaged with the hemispherical concave portion 32, The rotation position of the first rotating member 26 is held by a certain holding force.

The tip of the stopper 38 is the first rotating member 26
Is engaged with the hemispherical concave portion 32, one convex portion 26A protrudes in a direction perpendicular to the side surface 20A of the coupling portion forming concave portion 20, and all the other convex portions 26A are in the first rotation. It is housed in the member housing recess 22. (Second Rotating Member) The rib-shaped projection 14 has a second rotating member housing recess 42 formed on the other side surface 20 </ b> B side of the connecting portion forming recess 20. A second rotation shaft 44 is rotatably supported in the vicinity of the opening 42.

A second rotating member 46 is provided on the second rotating shaft 44.
Are integrally formed.

The second rotating member 46 is housed in the second rotating member housing recess 42.

The second rotating member 46 has a second rotating shaft 44
Are provided in the radial direction with the center being a center. By rotating the second rotating member 46, any one of the protrusions 46A is directed toward the inside of the connection portion forming recess 20. It can protrude from the side surface 20 </ b> B of the connecting portion forming recess 20. The tip of each projection 46A is formed in a semicircular shape.

Although not shown, the second rotating shaft 44 is also integrally provided with the cam 25, and the rib-shaped projection 14 is provided with a stopper 38 and a spring 40 corresponding to these. .

It should be noted that the second rotating member 46 is similar to the one shown in FIG.
As shown in FIG. 5, the first rotating member 26 can rotate only in the opposite direction.

Here, normally, as shown in FIG. 3, the tip of the convex portion 26A of the first rotating member 26 and the tip of the convex portion 46A of the second rotating member 46 are connected to the connecting portion forming concave portion 20A. Are in contact with each other, and these convex portions 26A and convex portions 4
7A and the bottom of the coupling portion forming recess 20 are provided between FIG.
Communicating part 4 for forming a connecting element 102 as shown in FIG.
8 will be formed. (Operation) Next, the operation of the mold 10 will be described.

First, in the initial state of the mold 10, as shown in FIG. 3, the tip of the convex portion 26A of the first rotating member 26 and the tip of the convex portion 46A of the second rotating member 46 are used for forming a connecting portion. It is in a state where they are in contact with each other inside the recess 20.

In this state, the raw tire is loaded into the mold 10, and the mold 10 is closed and the raw tire is inflated with a bladder, as in the conventional case, to form the tread of the raw tire as shown in FIG. The unvulcanized rubber 50 adheres to the tread forming surface 12. The communication portion 48 (see FIG. 1) is also filled with the unvulcanized rubber 50.

Thereafter, the green tire is vulcanized at a predetermined temperature for a predetermined time as in the conventional case.

After the vulcanization, when the tire is removed from the mold 10, as shown in FIG. 5B, the connecting element 102 presses the convex portions 26A and 46A and rotates them in the direction of the arrow,
The tip of the projection 26A and the tip of the projection 46A are separated from each other, and the connection element 102 is pulled out without cutting through the gap formed between the tip of the projection 26A and the tip of the projection 46A.

As shown in FIG. 5 (C), when the connecting element 102 is completely pulled out from the connecting portion forming recess 20, the first rotating member 26 and the second rotating member 46 are moved to the position shown in FIG.
Each of them is rotated by 90 degrees from the state of (A), and the tip of the stopper 38 engages with the hemispherical concave portion 32 and stops (ie, the initial state).

In the above embodiment, the connecting element 102 can be pulled out without cutting using the first rotating member 26 and the second rotating member 46. However, as shown in FIG. The connecting member 102 can be pulled out without cutting the connecting element 102 only with the rotating member 26 alone.

In this case, the projection 26 of the first rotating member 26
It is necessary to make the tip of A contact the opposing side wall surface.

[0072]

As described above, according to the tire manufacturing method and the tire vulcanization molding mold of the present invention, both sides of the groove are provided so as to provide a communicating portion communicating with the groove bottom in the longitudinal direction of the groove. It has an excellent effect that a tire having a tread in which land portions are connected by a connecting element can be formed efficiently and at low cost without cutting the connecting element.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a mold.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is a sectional view taken along line 3-3 in FIG. 2;

4A is a cross-sectional view of a bearing portion, and FIG. 4B is a cross-sectional view taken along line 4 (B) -4 (B) of FIG. 4A.

FIGS. 5A to 5C are explanatory diagrams showing a process in which a vulcanized tire is pulled out of a mold.

FIG. 6 is a cross-sectional view of a main part of a mold according to another embodiment.

FIG. 7 is a perspective view of blocks connected by a connecting portion.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 Mold (tire vulcanization molding mold) 14 Rib-shaped protrusion 16 Land portion forming concave portion 18 Land portion forming concave portion 20 Connecting portion forming concave portion 24 First rotation shaft 25 Cam (first rotation control means) 26 First 1st rotation member 26A convex part (first convex part) 38 stopper (first rotation control means) 40 spring (first rotation control means) 44 second rotary shaft 46 second rotary member 46A convex part ( (2nd convex part) 102 connecting element

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B29L 30:00 B29L 30:00

Claims (7)

[Claims] 1. Production of a tire having a tread having a tread in which land portions on both sides of a groove are connected by a connection element so as to provide a communication portion communicating with the groove bottom in a longitudinal direction of the groove, using a mold. A method, comprising: a rib-shaped protrusion for forming the groove; a land-shaped recess for forming the land provided on both sides of the rib-shaped protrusion; and one of the rib-shaped protrusions provided on the rib-shaped protrusion. A connecting portion forming recess formed by connecting the land forming recess and the other land forming recess from the top surface side of the rib-shaped projection toward the base portion and opening to the top surface side; A movable portion provided on the projection and capable of protruding and retracting from one side surface to the other side surface of the connection portion forming recess is projected into the connection portion forming recess in a mold provided on a tread forming surface. Contact the tip of the movable part to the other side. The raw tire is loaded in the state in which it is made to adhere, and thereafter, the tread of the raw tire is brought into close contact with the tread forming surface to perform vulcanization, and the tread of the vulcanized tire is separated from the tread forming surface, By pressing the movable portion with a connection element formed by the connection portion forming recess, the tip of the movable portion protruding into the connection portion forming recess is separated from the other side surface, and the tip and the other end are separated. A method for manufacturing a tire, wherein the connecting element is drawn out without being cut through a gap formed between the tire and a side surface. 2. A movable member having a plurality of projections extending radially about a rotation axis provided on the rib-shaped projection, the movable member being rotatable about the rotation axis, and a connecting element being drawn out. Rotation control means that allows the rotation of the rotation member only in the direction in which the rotation member is rotated, and that can hold the rotation position of the rotation member in a state where the tip of one of the protrusions is in contact with the other side surface. Then, vulcanization of the green tire is performed in a state where the tip of one of the convex portions is in contact with the other side surface, and after vulcanization, the connecting element formed by the concave portion for forming the connecting portion forms the convex. By pressing the portion, the rotating member is rotated to separate the tip of the projection protruding into the connection portion forming recess from the other side, and between the tip of the projection and the other side. The connection element through the formed gap Method for producing a tire according to claim 1, wherein the drawn without cutting. 3. The movable portion includes a plurality of first protrusions extending radially around a first rotation axis provided on one side surface of the connection portion forming recess of the rib-shaped protrusion. A first rotation member rotatable about the first rotation axis, and a radially extending center on a second rotation axis provided on the other side surface of the coupling portion forming recess of the rib-shaped projection; A second rotating member having a plurality of second protrusions and rotatable about the second rotating shaft; and allowing the first rotating member to rotate only in a direction in which the coupling element is pulled out, and First rotation control means for holding the rotation position of the first rotating member in a state where the tips of the first projections are in contact with the tips of the second projections; Allowing the rotation of the second rotation member only in the direction in which the second rotation member is pulled out, and A second rotation control means for holding a rotation position of the second rotation member in a state where a tip of the second projection is in contact with a tip of the first projection; The raw tire is vulcanized while the tip of the first protrusion is in contact with the tip of one of the second protrusions. After vulcanization, the green tire is formed by the connecting portion forming recess. The connection element presses the first protrusion and the second protrusion to rotate the first rotation member and the second rotation member, and the first protrusion protrudes to the connection part forming recess. And the tip of the second projection is separated from the tip of the second projection, and the connection is made via a gap formed between the tip of the first projection and the tip of the second projection. The method for manufacturing a tire according to claim 1, wherein the element is pulled out without cutting. 4. A rib-like projection for forming a groove in the tread, a land-forming recess provided on both sides of the rib-like projection for forming a land on the tread, and a rib-like projection provided on the rib-like projection. A connecting portion forming recess formed by connecting one land forming recess and the other land forming recess from the top surface side of the rib-shaped projection toward the base portion and opening to the top surface side; A rotating member provided with a plurality of projections extending radially about a rotation axis provided on the rib-shaped projection and rotatable about the rotation axis; and allowing rotation of the rotation member only in a direction in which a coupling element is pulled out. And rotation control means for holding the rotation position of the rotating member in a state where the tip of one of the protrusions is in contact with the other side surface, and a mold for tire vulcanization molding. . 5. The tire vulcanization molding mold according to claim 4, wherein a tip of the projection is formed in a substantially arc shape. 6. A rib-shaped protrusion for forming a groove in the tread, a land-forming recess provided on both sides of the rib-shaped protrusion for forming a land in the tread, and a rib-shaped protrusion provided on the rib-shaped protrusion. A connecting portion forming recess formed by connecting one land forming recess and the other land forming recess from the top surface side of the rib-shaped projection toward the base portion and opening to the top surface side; A plurality of first projections extending radially around a first rotation axis provided on one side surface of the connection portion forming recess of the rib-shaped projection are rotatable about the first rotation axis. A first rotating member, and a plurality of second protrusions extending radially around a second rotation axis provided on the other side surface of the connection portion forming recess of the rib-shaped protrusion. A second rotating member rotatable about the second rotation axis; The first rotation member is allowed to rotate only in the direction in which the first rotation member is projected, and the first rotation is performed in a state where the tip of one of the first projections is in contact with the tip of the second projection. First rotation control means for holding the rotational position of the member, and allowing the rotation of the second rotating member only in the direction in which the coupling element is pulled out, and the tip of one of the second protrusions is And a second rotation control means capable of holding a rotation position of the second rotation member in a state of being in contact with a tip of the first projection. 7. The tire vulcanization molding mold according to claim 6, wherein the tip of the first projection and the tip of the second projection are each formed in a substantially arc shape.