WO2011125405A1

WO2011125405A1 - Connecting apparatus and production method for tire forming members

Info

Publication number: WO2011125405A1
Application number: PCT/JP2011/055484
Authority: WO
Inventors: 健吾福田; 小川　裕一郎
Original assignee: 株式会社ブリヂストン
Priority date: 2010-04-09
Filing date: 2011-03-09
Publication date: 2011-10-13

Abstract

In order to reliably and uniformly press together and connect the edges of tire forming members and to improve the connection precision, a pair of connecting rollers (40) and pressing rollers ((32), (50)) are pressed against the edges ((71), (72)) of tire forming members (70) and moved along the edges ((71), (72)). The pair of connecting rollers (40) roll the facing edges ((71), (72)) and connect the edges ((71), (72)) together by pressing. The pressing rollers ((32), (50)) are rolled along with the pair of connecting rollers (40) and press both edges ((71), (72)). The rolling pressing rollers ((32), (50)) are displaced by means of a displacement means in accordance with the projections and recessions on the edges ((71), (72)) in a pressing position.

Description

Tire component joining apparatus and manufacturing method

[Technical Field] The present invention relates to a joining device for a tire constituent member for joining end portions of tire constituent members formed of rubber, and a method for manufacturing a tire constituent member having end portions joined.

A sheet-like tire component is used for forming an unvulcanized tire. For example, after the carcass ply is wound around a forming drum, the front end portion and the rear end portion are joined to form a cylindrical shape. As an apparatus for this joining, conventionally, joining apparatuses that join ends of tire constituent members with rollers are known (see Patent Documents 1 and 2).

The conventional joining device moves the pressing roller and the joint roller along the ends of the tire constituent members. While pressing the end of the tire constituent member with the pressing roller, the end is joined with the joint roller. In that case, in the joining apparatus described in Patent Documents 1 and 2, the end portions are butted together and joined.

FIG. 10 is a side view of an essential part showing an example of such a conventional joining apparatus. In FIG. 10, the joining apparatus which joins the edge part (it shows with a cross section in FIG. 10) of the tire structural member is shown typically.
A conventional joining device 100 includes a pressing roller 101 and a pair of joint rollers 102 as illustrated. Two pairs of joint rollers 102 are arranged side by side in the front-rear direction. The joining device 100 holds the pressing roller 101 and the joint roller 102 together and presses them against the end portion of the tire constituent member 70. The joining apparatus 100 joins the ends by moving the plurality of

rollers

101 and 102 along the ends.

However, unevenness may occur at the end of the tire constituent member 70 due to the change in thickness and unevenness of the lower member, or unevenness on the surface of the molding drum (not shown). On the other hand, in the conventional joining apparatus 100, the

rollers

101 and 102 are disposed so as to be in contact with the same plane, and are moved along the end portion of the tire constituent member 70 in a certain state. Therefore, when each of the

rollers

101 and 102 moves toward the concave portion 75 of the tire constituent member 70 (see FIG. 10A) or when it moves from the concave portion 75 to the outside (see FIG. 10B), a part of There is a possibility that only the

rollers

101 and 102 are in contact with the tire constituent member 70 and the

other rollers

101 and 102 are lifted.

As described above, in the conventional joining device 100, the

rollers

101 and 102 may not contact the end portion depending on the unevenness of the end portion of the tire constituent member 70. Further, the force pressing the

rollers

101 and 102 against the end may be weakened. Therefore, there is a concern that the joining state of the end portion of the tire constituent member 70 may partially change. Therefore, from the viewpoint of further suppressing fluctuations in joining accuracy and strength occurring at the end portions of the tire constituent member 70, it is required to join the end portions reliably and homogeneously regardless of the unevenness of the tire constituent member 70. ing.

JP-A-56-19742 JP 2003-305782 A

The present invention has been made in view of these conventional problems, and an object thereof is to reliably and uniformly join the end portions of the tire constituent members to improve the joining accuracy between the end portions of the tire constituent members. That is.

The present invention is a joining device for a tire constituent member that joins end portions of tire constituent members formed of rubber, and rolls the end portions facing each other of the tire constituent members to be joined. A pair of joining rollers that are joined by pressure bonding, a pressing roller that rolls together with the pair of joining rollers and presses both ends of the tire constituent member, and a pair of joining rollers and the pressing roller pressed against the end of the tire constituent member A moving means for moving along the end portion and a displacing means for displacing the pressing roller in accordance with the unevenness of the end portion of the tire constituent member at the pressing position are provided.
The present invention also relates to a method for manufacturing a tire constituent member for manufacturing a joined tire constituent member by joining ends of tire constituent members made of rubber, and comprising a pair of joining rollers and a pressure roller. , Pressing the ends of the tire constituent members and moving along the end portions, rolling the tire constituent members facing each other to join the pair of joining rollers, and crimping the ends together The step of joining, the step of rolling the pressing roller together with the pair of joining rollers to press both ends of the tire constituent member, and the pressing roller to roll according to the unevenness of the end of the tire constituent member at the pressing position And a step of displacing them.

According to the present invention, the end portions of the tire constituent members can be reliably and uniformly joined, and the joining accuracy between the end portions of the tire constituent members can be improved.

It is a principal part front view which shows the joining apparatus of the tire structural member of this embodiment. It is sectional drawing which shows the edge part of a tire structural member. It is the principal part top view which looked at the joining unit from the arrow X direction of FIG. It is the front view which looked at one joining roller from the radial direction outer side. It is a schematic diagram which shows the junction part vicinity of the tire structural member after joining. It is a principal part side view which shows the joining unit seen from the arrow Z direction of FIG. It is a principal part side view which shows the joining apparatus which joins the edge part of a tire structural member. It is the principal part top view which looked at the joining unit from the arrow X direction of FIG. It is sectional drawing which shows the edge part of a tire structural member. It is a principal part side view which shows the example of the joining apparatus of the conventional tire structural member.

An embodiment of a joining device for tire constituent members (hereinafter referred to as a joining device) and a method for manufacturing a tire constituent member according to the present invention will be described with reference to the drawings.
The joining apparatus of this embodiment joins the edge parts of the member (tire constituent member) which comprises each part of the tire formed with rubber. The end portions of the tire constituent members are joined to each other or overlap each other with a predetermined width (in this case, a width of 2 mm or less). The joining device manufactures a tire constituent member (joined tire constituent member) whose ends are joined.

It should be noted that the tire constituent members to be joined may be not only members made of unvulcanized rubber but also members made of unvulcanized rubber and cords, such as carcass plies, belts, or reinforcing members. The tire constituent member is formed into a sheet shape from rubber, and is formed into a predetermined shape by cutting or the like. The joining device joins the ends of one or a plurality of tire constituent members by abutting or overlapping each other and crimping them all over. Below, the example which winds the carcass ply which is a tire structural member around the outer periphery of a shaping | molding drum at the shaping | molding process of an unvulcanized tire, and joins both ends (front-and-rear end part) is demonstrated. The tire constituent member is formed in a cylindrical shape by joining both end portions. First, an example in which end portions of tire constituent members are brought into contact with each other using a joining device will be described. An example of joining with overlapping end portions will be described later.

FIG. 1 is a front view of an essential part schematically showing a schematic configuration of a bonding apparatus.
The joining apparatus 1 is provided with the cylindrical shaping | molding drum 2 and a pair of joining unit 30 which joins the tire structural member 70 like illustration. The molding drum 2 is held with its axis line in the horizontal direction. The pair of joining units 30 are arranged side by side in the axial direction of the forming drum 2. In addition, the bonding apparatus 1 includes a moving unit (moving mechanism) 10 that moves the pair of bonding units 30. The moving means 10 is disposed along the outer peripheral surface of the molding drum 2 above the molding drum 2. The moving means 10 moves the pair of joining units 30 in the axial direction and the radial direction of the forming drum 2 (left and right direction and up and down direction in FIG. 1).

The forming drum 2 is a support that supports the tire constituent member 70 to be joined when an unvulcanized tire is formed. The forming drum 2 is configured to be rotatable around an axis and capable of being expanded and contracted by a bladder or the like provided on the outer periphery. In the molding drum 2, the tire constituent member 70 is wound once around a predetermined position on the outer periphery, and the cylindrical tire constituent member 70 is held concentrically. Further, a driving device (not shown) is connected to the forming drum 2. The drive device includes a drive source such as a motor and a transmission mechanism that transmits the rotational power of the drive source to the forming drum 2. The forming drum 2 is rotationally driven by a driving device, rotates the tire constituent member 70 at a predetermined rotational speed, and stops it at an arbitrary rotational angle.

The tire component 70 is supplied from a supply device (not shown) toward the forming drum 2 and is wound around the forming drum 2. The front end portion and the rear end portion of the winding of the tire constituent member 70 are arranged to face each other so as to be adjacent to each other with a predetermined interval. The front and rear ends are arranged in parallel. The tire component 70 is formed by coating an organic fiber or steel cord with unvulcanized rubber. In the rubber on the surface of the tire component 70, a plurality of cords (not shown) are arranged in parallel so as to extend along the axial direction of the molding drum 2. The molding drum 2 supports both ends of the tire constituent member 70 to be joined with a slight gap therebetween. The joining device 1 moves the joining unit 30 along the end portions of the tire constituent member 70 on the forming drum 2 to join the end portions of the tire constituent member 70 together. The joining device 1 is configured symmetrically with respect to the central portion CL in the axial direction of the forming drum 2. Below, about the joining apparatus 1, the part of the one side (left side of a figure) of center part CL is mainly demonstrated.

The moving means 10 includes a guide rail 11, a screw shaft 12, a motor 13, and a frame (not shown) to which they are attached. The guide rail 11 is bridged in parallel with the axis of the forming drum 2. The screw shaft 12 is disposed above the guide rail 11 and parallel to the guide rail 11. A rotation shaft 13 A of the motor 13 is arranged in parallel to the screw shaft 12. The screw shaft 12 is rotatably supported by the frame. An endless belt 16 is bridged between a driven pulley 14 fixed to the screw shaft 12 and a driving pulley 15 fixed to the rotating shaft 13A of the motor 13. The rotational power of the motor 13 is transmitted to the screw shaft 12 via the drive pulley 15, the belt 16 and the driven pulley 14. The screw shaft 12 rotates at a predetermined speed in both directions around the axis.

The moving means 10 has a mounting bracket 17 attached to the screw shaft 12 and a piston / cylinder mechanism 18. The mounting bracket 17 has a screw hole into which the screw shaft 12 is screwed and a guide hole through which the guide rail 11 passes slidably. The mounting bracket 17 is guided by the guide rail 11 along with the rotation of the screw shaft 12 and moves at a predetermined speed in both axial directions of the forming drum 2. The piston / cylinder mechanism 18 is fixed to the side surface of the mounting bracket 17 downward. The piston / cylinder mechanism 18 moves the piston rod 18P forward and backward from the cylinder 18S. The piston rod 18 P is arranged along the radial direction of the molding drum 2 and toward the axis of the molding drum 2. The joining unit 30 is attached to the tip (lower end) of the piston rod 18P. The piston / cylinder mechanism 18 moves the piston rod 18 P forward and backward to bring the joining unit 30 closer to and away from the tire constituent member 70. Thereby, the moving means 10 presses the joining unit 30 against the end of the tire constituent member 70 to be joined with a predetermined pressure. Further, the moving means 10 rotates the screw shaft 12 by the motor 13 to move the joining unit 30 along the end portion of the tire constituent member 70.

The joining unit 30 has a pair of joining rollers 40 and

pressing rollers

32 and 50 as described later. The moving means 10 moves (rolls) integrally along the end portion while pressing the pair of joining rollers 40 and the

pressing rollers

32 and 50 against the end portion of the tire constituent member 70 by the movement of the joining unit 30. The joining unit 30 includes a rectangular plate-shaped fixing member 60 and a rectangular frame body 31. The fixing member 60 is fixed to the piston rod 18P of the moving means 10. The frame body 31 is attached to the lower surface of the fixing member 60 and is disposed along the outer periphery of the tire constituent member 70. The moving means 10 moves the fixing member 60 and the frame body 31 together. Thereby, the joining unit 30 joins the end portions of the tire constituent member 70 with the

rollers

32, 40, and 50 provided on the frame body 31.

FIG. 2 is a cross-sectional view showing an end portion of the tire constituent member 70. In FIG. 2, the tire constituent member 70 is schematically shown when viewed from the axial direction of the molding drum 2.
The tire constituent member 70 has a plurality of cords C therein as shown in the drawing. Before joining, a gap R (see FIG. 2A) having a predetermined width is provided between both

end portions

71 and 72 of the tire constituent member 70. End portions 71 and 72 (see FIG. 2B) are brought into contact with each other by the joining unit 30, and the tire constituent member 70 is joined.

FIG. 3 is a plan view of the principal part of the joining unit 30 being joined as seen from the direction of the arrow X in FIG. In FIG. 3, the configuration of the frame body 31 is shown through the fixing member 60 (indicated by a dotted line in FIG. 3). A tire constituent member 70 in the vicinity of the joining unit 30 is also schematically shown. Moreover, the both ends 71 and 72 of the tire structural member 70 before joining are shown on the left side of FIG. A slight gap R is provided at both

end portions

71 and 72 before joining. The tire constituent member 70 is joined by movement of the joining unit 30 in the joining direction (arrow S in the figure). A joining portion 73 of the tire constituent member 70 after joining is shown on the right side of FIG.

The joining unit 30 has a pair of joining rollers 40 (40A, 40B) and

pressing rollers

32, 50 as shown in the figure. At least one pair of the pair of joining rollers 40 is provided. The

pressure rollers

32 and 50 are arranged in front of and behind the moving direction (bonding direction S) by the moving unit 10 with respect to the bonding roller 40. In this joining apparatus 1, two pairs of joining rollers 40 are provided. The

pressing rollers

32 and 50 include a pressing roller 32 and a reinforcing roller 50 and are disposed in front of and behind the joining roller 40. In the frame 31 of the joining unit 30, a pressing roller 32, a pair of joining rollers 40, and a reinforcing roller 50 are arranged in order from the front side to the rear side in the joining direction

S. Shaft members

33, 34, and 35 are attached to the frame body 31. The

rollers

32, 40, and 50 are supported by

shaft members

33, 34, and 35, respectively, via bearings (not shown) so as to be rotatable around the axis.

The outer peripheral surface of the pressing roller 32 is formed in a drum shape having a concave curved surface shape with a curvature corresponding to the surface shape of the forming drum 2. The pressing roller 32 is arranged with its axial direction oriented in a direction perpendicular to the axial direction of the molding drum 2, and is supported by the shaft member 33. The pressing roller 32 is held integrally with the pair of joining rollers 40 by the frame body 31. The pressing roller 32 is pressed against both

end portions

71 and 72 of the tire constituent member 70 together with the joining roller 40 to press the

end portions

71 and 72 in the contact range. The

end portions

71 and 72 are sandwiched between the pressing roller 32 and the forming drum 2. Further, the pressing roller 32 that is a pressing roller rolls on the

end portions

opposite end portions

71 and 72. The joining unit 30 presses both

end portions

71 and 72 with a pressing roller 32 and sequentially joins the

end portions

71 and 72 with a pair of joining rollers 40.

The pair of joining rollers 40 has a cylindrical shape, and one end thereof is supported by the shaft member 34 (34A, 34B). Further, the joining roller 40 is disposed symmetrically with respect to the joining portion 73 of the tire constituent member 70. The axis of the joining roller 40 is disposed so as to incline backward (rightward in FIG. 3) in the joining direction S from the joining portion 73 side (inner side) to the outer side. The angle Y of the axis of the joining roller 40 is a relatively small predetermined angle (for example, an angle between 5 to 30 °). The angle Y is an angle of the axis with respect to the direction orthogonal to the joint portion 73. The pair of joining rollers 40 is disposed so that the intersection of both axes is located on the joining portion 73. Furthermore, the same number of protrusions 41 (41A, 41B) are formed at equal intervals in the circumferential direction along the opposing edges of the pair of joining rollers 40. The protrusion 41 protrudes in the axial direction of the joining roller 40. On the joint portion 73 side of the pair of joining rollers 40, the protrusions 41 and the recesses between the protrusions 41 are alternately provided at the same pitch along the circumferential direction. In the pair of joining rollers 40, the protrusions 41 and the recesses are alternately arranged along the circumferential direction. Further, a part of the protrusion 41 enters between the protrusions 41 (dents) on the other side, and the protrusions 41 mesh with each other. Thereby, a pair of joining roller 40 rotates at equal speed synchronously.

FIG. 4 is a front view of one joining roller 40 as viewed from the outside in the radial direction. In FIG. 4, a part of the joining roller 40 (upper part in the figure) is shown in cross section.
On the outer periphery of the joining roller 40, as shown in the figure, a plurality of protrusions T extending in the circumferential direction are formed in parallel or in a ring shape or in a spiral shape. The cross-sectional shape of the joining roller 40 is formed in a sawtooth shape in which a plurality of protrusions are arranged. The protrusion T is formed in a triangular cross section and is disposed on the entire outer periphery of the joining roller 40 including the protrusion 41. In the ridge T, one side surface on the projection 41 side is orthogonal to the axial direction of the joining roller 40, and the other side surface is inclined at a predetermined angle with respect to the axial direction of the joining roller 40. When the joining roller 40 is pressed to a predetermined range of the

end portions

71 and 72, the protrusion T contacts the

end portions

71 and 72 of the tire constituent member 70.

The joining apparatus 1 moves the joining unit 30 by the above-described moving means 10 (see FIG. 1) and presses the pressing roller 32 (see FIG. 3) against both

end portions

71 and 72 of the tire constituent member 70. As a result, the pressing roller 32 comes into contact with both

end portions

71 and 72. Moreover, the joining apparatus 1 presses the joining

rollers

40A and 40B against the

end portions

71 and 72, respectively. The joining rollers 40 A and 40 B are arranged symmetrically with the gap R therebetween, and come into contact with the

end portions

71 and 72. In this state, the joining unit 30 is moved in the joining direction S along the

end portions

71 and 72. The joining apparatus 1 rolls the joining rollers 40 A and 40 B on the surfaces of the

end portions

71 and 72 while sequentially pressing the both

end portions

71 and 72 with the pressing roller 32. The joining rollers 40 A and 40 B roll synchronously while being inclined in opposite directions.

As the inclined joining

rollers

40A and 40B roll, the

end portions

71 and 72 are displaced together with the protrusions T of the joining

rollers

40A and 40B. Further, the

end portions

71 and 72 are pushed by the ridge T and receive a force or the like in a direction intersecting the ridge T. In this way, forces in a direction approaching each other act on the

end portions

71 and 72. As a result, both

end portions

71 and 72 are attracted and abutted while eliminating the gap R. The end surfaces of both

end portions

71 and 72 are pressure-bonded by pressure applied from the joining

rollers

40A and 40B. At the same time, since forces alternately act on the

end portions

71 and 72 from the engaging protrusions 41A and 41B of the joining

rollers

40A and 40B, the surfaces of the

end portions

71 and 72 are alternately deformed and joined together. As described above, the

end portions

71 and 72 are bonded together by pressure bonding.

FIG. 5 is a schematic view showing the vicinity of the joining portion 73 of the tire constituent member 70 after joining. 5A is a perspective view, and FIG. 5B is a cross-sectional view taken along line VV in FIG. 5A.
As illustrated, the joining portion 73 is linearly crimped on the inner side (lower side in FIG. 5) by joining the tire constituent members 70. On the other hand, on the surface side of the end portions 71 and 72 (upper side in FIG. 5), the rubber 73W is alternately stretched partially to the surfaces of the

other end portions

71 and 72 by the protrusions 41A and 41B. As a result, the

end portions

71 and 72 on the surface side are alternately overlapped with the surface on the other side and joined in an undulating manner to the inner portion of the joint portion 73.

Thus, the joining device 1 causes the pair of joining rollers 40 (see FIG. 3) to abut on the

ends

71 and 72 of the tire constituent member 70 to be joined on both sides of the gap R. Further, the pair of joining rollers 40 are rolled on the

respective end portions

71 and 72 facing each other. Along with this rolling, the pair of joining rollers 40 abuts and joins the end portions 71 and 72 (both end surfaces) while pulling the both

end portions

71 and 72 together. The tire constituent member 70 is continuously joined and formed into a cylindrical shape. At that time, the joining apparatus 1 causes the moving means 10 to roll the front and rear two sets of joining rollers 40 in conjunction with each other. The two joining rollers 40 cause the

end portions

71 and 72 to be joined by executing the same joining operation continuously.

The joining apparatus 1 of the present embodiment presses the joining portion 73 of the tire constituent member 70 by the reinforcing roller 50 (see FIG. 3) that is a pressing roller disposed rearward in the moving direction following joining by the joining roller 40. To do. The reinforcing roller 50 is formed in a cylindrical shape and is supported by the shaft member 35. The reinforcing roller 50 is held integrally with the pressing roller 32 and the pair of joining rollers 40 by the frame 31, and is pressed against the tire constituent member 70 together with the

rollers

32 and 40 to roll. In this state, the reinforcing roller 50 abuts against the

end portions

71 and 72 of the tire constituent member 70 that are abutted on both sides of the joint portion 73. The reinforcing roller 50 presses a predetermined range of both

end portions

71 and 72 with the same pressure. The reinforcing roller 50 rolls in the joining direction S following the pair of joining rollers 40 as the joining unit 30 moves. The reinforcing roller 50 presses both

end portions

71 and 72 joined by the joining roller 40 to reinforce the joining between the

end portions

71 and 72.

Thus, the reinforcing roller 50 is a rotating body (or rolling element) that rolls on the

end portions

71 and 72 while rotating. The outer peripheral surface of the reinforcing roller 50 that is in contact with the tire constituent member 70 is a friction surface 51 that rubs the surfaces of the

end portions

71 and 72 so as to polish the interface between the

end portions

71 and 72. The friction surface 51 is provided with a plurality of ridges or grooves throughout. The plurality of ridges or grooves are arranged in an inclined direction with respect to the rotation direction of the reinforcing roller 50. On the other hand, the friction surface 51 may be provided with a plurality of protrusions or depressions. The plurality of protrusions or dents are arranged side by side in an inclined direction with respect to the rotation direction of the reinforcing roller 50. Thereby, the friction surface 51 is formed in the rough surface in which the unevenness | corrugation was formed, and a rough surface with a large frictional force with rubber | gum. The unevenness of the uneven surface is pushed into the rubber when pressed against the surface of the tire constituent member 70. Here, the friction surface 51 is formed with a plurality of inclined concave grooves intersecting by knurling. The friction surface 51 comes into contact with the

end portions

71 and 72 by a concave groove on the knurled surface and a plurality of protrusions between the concave grooves.

The reinforcing roller 50 rolls on both

end portions

71 and 72 while pressing both end portions 71 and 72 (joint portion 73) of the joined tire constituent member 70 with the friction surface 51. The friction surface 51 has a plurality of convex portions or concave portions arranged in a direction inclined with respect to the rotation direction of the reinforcing roller 50, and the plurality of convex portions or concave portions abut both

end portions

71 and 72. As the reinforcing roller 50 rolls, the friction surfaces 51 rub the

end portions

71 and 72 that are abutted against each other. Both

end portions

71 and 72 are deformed so as to bulge toward each other by receiving pressure from the reinforcing roller 50, and are more strongly pressure-bonded. Further, the reinforcing roller 50 presses the rubber on the surfaces of the both

end portions

71 and 72 while rubbing the both

end portions

71 and 72 with the friction surface 51 subjected to knurling. Thereby, the rubber on the surface is caused to flow, and the interface is crushed while the interface between the joined

end portions

71 and 72 is filled with rubber. The reinforcing roller 50 eliminates the interface between both

end portions

71 and 72 with the rubbed surface side as the center. In this way, the reinforcing roller 50 sequentially reinforces the joining of the

end portions

71 and 72 so as to polish the joining interface between the both

end portions

71 and 72 as it rolls. The

end portions

71 and 72 are firmly joined by the reinforcing roller 50.

Further, the bonding apparatus 1 includes heating means (not shown) including a heater and a temperature sensor. The heater is provided inside the reinforcing roller 50 and heats the reinforcing roller 50 or heats the reinforcing roller 50 from the outside. The temperature sensor measures the temperature of the friction surface 51 of the reinforcing roller 50. The heating unit heats the friction surface 51 of the reinforcing roller 50 to a predetermined temperature based on the temperature measurement result by the temperature sensor, and maintains the temperature of the friction surface 51. The joining apparatus 1 heats both ends 71 and 72 of the tire constituent member 70 at the pressed (friction) position by the heated friction surface 51. The rubber in the vicinity of both

end portions

71 and 72 is soft and has high fluidity. As a result, the effect of filling the bonding interface between the both

end portions

71 and 72 by the reinforcing roller 50 and the effect of grinding are enhanced, so that the reinforcing operation by the reinforcing roller 50 is assisted. The

end portions

71 and 72 are bonded more firmly with high bonding strength. At that time, the friction surface 51 is heated to an optimum temperature (for example, 50 to 80 ° C.) determined by pressure applied to the tire constituent member 70, rolling speed, physical properties of rubber of the tire constituent member 70, and the like.

Next, the structure provided in the side part of the joining unit 30 and the fixing member 60 will be described. On both sides of the

rollers

32, 40, 50, the joining unit 30 is similarly configured. Therefore, in the following, one side portion of the joining unit 30 (the lower portion in FIG. 3) will be described as an example.
FIG. 6 is a main part side view schematically showing the joining unit 30 as seen from the direction of arrow Z in FIG. 3. In FIG. 6, the

rollers

32, 40 and 50 of the joining unit 30 are separated from the tire constituent member 70.

The

shaft members

33, 34, and 35 of the

rollers

32, 40, and 50 have a rectangular bar shape with a rectangular cross section as illustrated. The

shaft members

33, 34, and 35 penetrate the side surface of the frame body 31 and protrude outward from the inside of the frame body 31 (front side in FIG. 6). In addition, in a pair of joining rollers 40 (hereinafter referred to as a fixed joining roller 40F) positioned behind the joining direction S among the front and rear joining rollers 40, the shaft member 34 is fixed in the through hole of the frame 31. The fixed joining roller 40F is fixed to the frame body 31 and moves integrally with the frame body 31.

In each of the

other rollers

32, 40D, 50 including the joining roller 40 (hereinafter referred to as a displacement joining roller 40D) positioned in front of the joining direction S with respect to the fixed joining roller 40F, the

shaft members

33, 34, 35 are guided. The insides of the

holes

36, 37, and 38 are displaced in the longitudinal direction (vertical direction in FIG. 6). The guide holes 36, 37, and 38 have a rectangular shape and penetrate the side surface of the frame body 31. The

shaft members

33, 34, and 35 of the

rollers

32, 40D, and 50 are inserted into the guide holes 36, 37, and 38, respectively, and are guided and displaced by the guide holes 36, 37, and 38, respectively. Further, the

shaft members

33, 34, 35 are locked in a displaceable manner in the guide holes 36, 37, 38 by locking means (not shown). The

shaft members

33, 34, and 35 are displaced in the guide holes 36, 37, and 38 without changing the posture and the protruding length from the frame body 31. In these

shaft members

33, 34, and 35, the portions protruding from the frame body 31 are urged in one direction of displacement (downward in FIG. 6) by the urging means 61, 62, and 63. The urging means 61, 62 and 63 are fixed to the side portion of the fixing member 60.

The urging means 61, 62, and 63 are, for example, a piston / cylinder mechanism, an elastic member such as a spring, or a plunger that urges a pin-like urging member to the outside by an internal spring. Here, the urging means 61, 62, and 63 are plungers arranged downward. The urging means 61, 62, and 63 always urge the

shaft members

33, 34, and 35 downward by the urging

members

61A, 62A, and 63A, and the

shaft members

33, 34, and 35 are guided to the guide holes 36, 37, and 38, respectively. Located at the bottom of the inside. The urging means 61, 62, 63 urge the

shaft members

33, 34, 35 with a force that is weaker than the force by which the moving means 10 presses the

rollers

32, 40 D, 50 against the tire constituent member 70. When the

rollers

32, 40 D, 50 are pressed against the tire constituent member 70, a force in the direction opposite to the urging direction acts on the urging means 61, 62, 63. At that time, the urging means 61, 62, 63 displace the

shaft members

33, 34, 35 upward in the guide holes 36, 37, 38. Further, the biasing means 61, 62, 63 displace the

shaft members

33, 34, 35 in both directions within the guide holes 36, 37, 38. Each of the

rollers

32, 40 D, 50 is displaced according to the unevenness of the surface of the tire constituent member 70 with reference to the fixed joining roller 40 F that the moving means 10 presses against the tire constituent member 70.

In this way, the urging means 61, 62, 63 urge the rolling

rollers

32, 40 D, 50 toward the

end portions

71, 72 of the tire constituent member 70, and in a direction opposite to the urging direction. Displace in both directions. Therefore, the urging means 61, 62, 63 together with the

shaft members

33, 34, 35 and the guide holes 36, 37, 38 constitute displacement means 64, 65, 66 for displacing the

rollers

32, 40D, 50. The

rollers

32, 40D, 50 other than the fixed joining roller 40F are displaced independently by the displacement means 64, 65, 66 while moving integrally with the frame body 31. The

rollers

32, 40D, and 50 are displaced independently from the fixed joining roller 40F.

The joining device 1 displaces the pressing roller 32 and the reinforcing roller 50 that are pressing rollers by the displacing means 64 and 66. The

end portions

71 and 72 of the tire constituent member 70 may be uneven due to the surface shape, unevenness of the lower member, and the like. The pressing roller 32 and the reinforcing roller 50 are displaced by the displacement means 64 and 66 in accordance with the unevenness of the

end portions

71 and 72 at the pressing position, respectively. Thereby, the

rollers

32 and 50 at the time of rolling displace following the unevenness | corrugations of the

edge parts

71 and 72, and roll in the state which pressed the

edge parts

71 and 72. FIG. In addition, the pair of displacement joining rollers 40 D that roll by the displacing means 65 are also displaced according to the unevenness of the

end portions

71 and 72 at the rolling position.

When the joining apparatus 1 has a plurality of pairs of joining rollers 40 in the moving direction (joining direction S) by the moving means 10, each pair of joining rollers 40 excluding the last pair of joining rollers 40 in the moving direction is Displacement means 65 is provided. The displacement means 65 displaces each pair of joining rollers 40 according to the unevenness of the

end portions

71 and 72 at the rolling position. Here, the moving direction by the moving means 10 is a direction in which the moving means 10 moves the

rollers

32, 40, 50 in order to join the

end portions

71, 72 together. The moving direction is a direction determined according to the inclination direction of the pair of joining rollers 40 and the arrangement positions of the

rollers

32 and 50. In this joining apparatus 1, the

rollers

32, 40, and 50 are moved so that the pressing roller 32 is in the forefront in the moving direction. Therefore, the pair of joining rollers 40 located farthest from the pressing roller 32 among the plurality of pairs of joining rollers 40 becomes the last pair of joining rollers 40 in the moving direction. Therefore, the joining device 1 displaces each pair of joining rollers 40 excluding the pair of joining rollers 40 farthest from the pressing roller 32 according to the unevenness of the

end portions

71 and 72 by the displacing means 65.

It should be noted that the pair of fixed joining rollers 40F are arranged so as to be shifted from the positions of the

other rollers

32, 40D, 50 in a state where the

rollers

32, 40, 50 are separated from the

end portions

71, 72 of the tire constituent member 70. . The pair of fixed joining rollers 40F are rollers not provided with a displacement means. The

other rollers

32, 40D, 50 are rollers provided with displacement means 64, 65, 66. The fixed joining roller 40F is arranged so as to be shifted from the

other rollers

32, 40D, 50 in the direction opposite to the pressing direction by the moving means 10 (upward in FIG. 6). The fixed joining roller 40F and the

other rollers

32, 40D, 50 are arranged so that the outer circumferences contacting the

end portions

71, 72 are located at a predetermined interval E (for example, about 5 mm). Therefore, after the

other rollers

32, 40 D, 50 come into contact with the

end portions

71, 72 and are displaced by the pressing of the moving means 10, the fixed joining roller 40 F contacts the

end portions

71, 72. The fixed joining roller 40F is pressed against the

end portions

71 and 72 with a relatively strong force by the pressure of the moving means 10.

The

other rollers

32, 40D, 50 are pressed against the

end portions

71, 72 of the tire constituent member 70 with a relatively weak force according to the urging force by the urging means 61, 62, 63 against the fixed joining roller 40F. It is done. At that time, the pressing roller 32 only needs to press the

end portions

71 and 72 to prevent the lifting, so that the pressing roller 32 is pressed with a relatively weak force. The displacement joining roller 40 D is also pressed with a relatively weak force so that the

end portions

71 and 72 are attracted without being brought into close contact with the lower member. The reinforcing roller 50 is pressed with a stronger force than the pressing roller 32 and the displacement bonding roller 40D in order to reliably reinforce the bonding between the

end portions

71 and 72. The urging forces of the urging means 61, 62, and 63 are set according to the force pressing the

rollers

32, 40D, and 50, respectively.

Next, the joining apparatus 1 manufactures the joined tire constituent member 70 by joining the

end parts

71 and 72 of the tire constituent member 70 made of rubber and joining the

end parts

71 and 72 together. A manufacturing method will be described. The following procedures are performed under the control of a control device (not shown). The control device has a microcomputer, for example. The microcomputer includes a microprocessor (MPU), a ROM (Read Only Memory) that stores programs for various control processes, and a RAM (Random Access Memory) that temporarily stores data directly accessed by the MPU. Moreover, each part of the apparatus is connected to the control apparatus via connection means. The control device controls each connected unit to operate at preset timings and conditions, and causes each unit of the device to perform an operation for joining.

When joining the tire constituent member 70 (see FIG. 1), first, a member disposed inside the tire constituent member 70 is disposed on the outer periphery of the molding drum 2. The member to be arranged is an inner liner or the like. Thereafter, the tire constituent member 70 is wound once around the outer periphery of the rotating forming drum 2. Further, both

end portions

71 and 72 of the tire constituent member 70 are arranged at the pressing position of the joining unit 30 by the moving means 10, and the

end portions

71 and 72 are opposed to and supported by the molding drum 2. Next, the joining device 1 moves one joining unit 30 (left side in FIG. 1) to the center portion CL of the forming drum 2 by the moving means 10 and lowers it. Accordingly, the pressing roller 32, the joining roller 40, and the reinforcing roller 50 are pressed against the end portions 71 and 72 (see FIG. 3) with a predetermined pressure. Further, the

end portions

71 and 72 are pressed by the pressing roller 32. The outer peripheral portion of the joining roller 40 (the protruding end portion of the protrusion T) and the friction surface 51 of the reinforcing roller 50 are brought into contact with the

end portions

71 and 72 of the tire constituent member 70.

Subsequently, the joining unit 30 is moved outward in the axial direction of the forming drum 2. The pair of joining rollers 40 and the pressing roller (the pressing roller 32 and the reinforcing roller 50) are integrally pressed against the

end portions

71 and 72 of the tire constituent member 70 and moved along the

end portions

71 and 72. As a result, the pair of joining rollers 40 are rolled in the joining direction S on the

end portions

71 and 72 to be joined. As described above, the

end portions

71 and 72 are brought into contact with each other by the pair of joining rollers 40 and are pressed and joined together. Further, the pressing roller 32 and the reinforcing roller 50 are rolled together with the pair of joining rollers 40 to press both

end portions

71 and 72. At the same time, the pressing means 32, the pair of displacement joining rollers 40D, and the reinforcing roller 50 are displaced by the displacing means 64, 65, 66 according to the unevenness of the

end portions

71, 72 at the pressing position. The abutted both

end portions

71 and 72 are heated while being pressed by the friction surface 51 of the heated reinforcing roller 50. The reinforcing roller 50 is rolled on both end portions 71 and 72 (joining portion 73) to reinforce the joining of the

end portions

71 and 72 as described above.

Next, when one joining unit 30 moves by a predetermined distance, the joining apparatus 1 lowers the other (right side in FIG. 1) joining unit 30 at the center portion CL of the forming drum 2. The

rollers

32, 40, 50 of the joining unit 30 are pressed against the already joined ends 71, 72. Subsequently, the pair of joining units 30 are moved at the same speed in opposite directions toward the outside in the axial direction of the forming drum 2. Thereby, the

rollers

32, 40, and 50 are rolled along the

end portions

71 and 72, and the

end portions

71 and 72 are joined throughout. Thereafter, an unvulcanized tire having a predetermined shape and structure is formed, for example, by arranging another tire constituent member on the joined tire constituent member 70. Various tires are manufactured by vulcanizing and molding an unvulcanized tire.

FIG. 7 is a side view of the main part showing the joining device 1 for joining the

end portions

71 and 72 of the tire constituent member 70 (shown in section in FIG. 7). In FIG. 7, the joining unit 30 which joins the

edge parts

71 and 72 is shown typically.
In the present embodiment, as shown in the drawing, the pressing roller 32 and the reinforcing roller 50 are rolled together with the pair of joining rollers 40. At this time, the pressing means 32 and the reinforcing roller 50 are displaced according to the unevenness of the

end portions

71 and 72 by the displacing means 64 and 66. Therefore, when each

roller

32, 40, 50 moves toward the recess 75 of the tire component 70 (see FIG. 7A) or when moving from the inside of the recess 75 to the outside (see FIG. 7B), The

rollers

32, 40, 50 are displaced following the unevenness. The

rollers

32, 40, 50 are maintained in contact with the

end portions

71, 72.

As a result, the

rollers

32, 40, 50 can be rolled while maintaining the same state along the

end portions

71, 72 while suppressing changes in the pressing force to the

end portions

71, 72. Thereby, the joining operation | movement of the

edge parts

71 and 72 can be performed stably over the whole. In addition, since the

end portions

71 and 72 can be reliably butted against each other regardless of the unevenness of the tire constituent member 70, variations in joining accuracy and strength occurring along the

end portions

71 and 72 can be suppressed. The at least one joining roller 40 (fixed joining roller 40F) is reliably pressed against the

end portions

71 and 72 by the moving means 10 with a relatively strong force set in advance. 72 can be reliably joined with sufficient strength.

Therefore, according to the present embodiment, the

end portions

71 and 72 of the tire constituent member 70 can be reliably butted together and joined. The joining accuracy of the

end portions

71 and 72 of the tire constituent member 70 can also be improved. Moreover, since the

end parts

71 and 72 can be joined by moving the joining unit 30 on the

end parts

71 and 72, the

end parts

71 and 72 can be reliably joined even on the molding drum 2. Therefore, the joining apparatus 1 is suitable for joining the tire constituent member 70 wound around the forming drum 2, and a great effect is obtained at that time. Further, even when the tire constituent member 70 is a member other than the carcass ply, the joining device 1 can firmly and reliably join the

end portions

71 and 72 by dealing with the unevenness of each member.

When the reinforcing roller 50 is provided in the joining unit 30, the joining of the

end portions

71 and 72 of the tire constituent member 70 can be reinforced as described above. Therefore, the

end portions

71 and 72 can be reliably bonded with higher bonding strength. Further, the joining device 1 arranges

rollers

32 and 50 in front of and behind the joining roller 40, and causes the

rollers

40, 32, and 50 to operate simultaneously by the moving means 10. Thereby, since the

end portions

71 and 72 can be joined by one operation, the time and man-hour required for joining can be reduced. At the same time, since the configuration and operation of the joining device 1 are simplified, it is possible to reduce the size of the device.

The fixed joining roller 40F (see FIG. 6) that is not provided with the displacing means in a state separated from the tire constituent member 70 is disposed at a position shifted from the

rollers

32, 40D, and 50 that are provided with the displacing means 64, 65, and 66. At this time, it is preferable that the fixed joining roller 40F is shifted from the

rollers

32, 40D, and 50 in the direction opposite to the pressing direction by the moving means 10. By doing in this way, the

rollers

32, 40D, 50 come into contact with the tire constituent member 70 before the fixed joining roller 40F at the time of pressing against the

end portions

71, 72. Further, the

rollers

32, 40 D, and 50 are displaced in both directions in the pressing direction with respect to the fixed joining roller 40 F and come into contact with the tire constituent member 70. Thereby, since the fixed joining roller 40F and the

other rollers

32, 40D, and 50 can be maintained in contact with the tire constituent member 70, the

entire end portions

71 and 72 can be joined more reliably and evenly.

In this embodiment, two sets of a pair of joining rollers 40 are arranged on the front and rear sides to constitute joining means for the

end portions

71 and 72 of the tire constituent member 70. On the other hand, the pair of joining rollers 40 may be provided in one set, or three or more sets. However, when a plurality of sets of the pair of joining rollers 40 are provided, the

end portions

71 and 72 can be gradually drawn by them. Therefore, the

end portions

71 and 72 can be drawn smoothly and securely and firmly joined while suppressing the influence of the joining roller 40 on the tire constituent member 70 low. At this time, it is preferable to provide a displacement means 65 for displacing the pair of joining rollers 40 excluding the pair of joining rollers 40 at the end in the moving direction according to the unevenness of the

end portions

71 and 72.

Thereby, since the pair of joining rollers 40 are appropriately displaced according to the unevenness, the joining rollers 40 do not press the

end portions

71 and 72 strongly. That is, since the pressing force of the joining roller 40 can be kept relatively low, it is possible to prevent the tire constituent member 70 and the lower member from being in close contact with each other. Therefore, the

end portions

71 and 72 of the tire constituent member 70 are surely attracted. Even if the arrangement accuracy and the gap R of the

end portions

71 and 72 before joining are changed, the

end portions

71 and 72 can be brought close to each other. Further, since the pair of joining rollers 40 can be displaced following the unevenness and kept in contact with the

end portions

71 and 72, the

end portions

71 and 72 can be pulled and joined by the

end portions

71 and 72. It can be performed stably throughout. At the same time, the pair of rearmost joining rollers 40 is pressed relatively strongly against the tire constituent member 70 by the moving means 10. Therefore, the pair of joining rollers 40 at the rear end join the

end portions

71 and 72 that are sufficiently brought close to each other with strong force.

Next, an example in which the

end portions

71 and 72 of the tire constituent member 70 are overlapped and joined by the joining device 1 will be described.
FIG. 8 is a plan view of the main part of the joining unit 30 as seen from the direction of the arrow X in FIG. In FIG. 8, the joining unit 30 is shown corresponding to FIG.
FIG. 9 is a cross-sectional view showing the

end portions

71 and 72 of the tire constituent member 70. In FIG. 9, the tire constituent member 70 is shown corresponding to FIG.

The tire constituent member 70 is arranged on the molding drum 2 so that the

end portions

71 and 72 overlap as shown in the figure. Before joining the tire constituent member 70 (see FIG. 9A), the

end portions

71 and 72 overlap with a predetermined width H (here, a width of 2 mm or less). The joining apparatus 1 presses the joining unit 30 against the overlap portion L of the

end portions

71 and 72 and moves it in the joining direction S along the

end portions

71 and 72. The

rollers

32, 40, 50 of the joining unit 30 are arranged symmetrically with respect to the overlap portion L, and roll on

end portions

71, 72 including the overlap portion L.

The tire constituent member 70 (see FIG. 9B) is joined by the movement of the joining unit 30. At that time, the pair of joining rollers 40 rolls on the

end portions

71 and 72 and applies pressure to the overlap portion L. Accordingly, the pair of joining rollers 40 press-bond the

end portions

71 and 72 of the overlap portion L to each other. Further, the pair of joining rollers 40 squeeze the overlap portion L so that the

end portions

71 and 72 are overlapped and joined. The joining apparatus 1 moves the joining unit 30 along the overlap portion L of the

end portions

71 and 72, and joins the

end portions

71 and 72 by the

rollers

32, 40, and 50 in the same manner as described above. The

end portions

71 and 72 are overlapped and joined with a width of 2 mm or less.

By using the joining device 1, even when the

end portions

71 and 72 are overlapped and joined, the same effect as that obtained when the

end portions

71 and 72 are joined together can be obtained. For example, the overlapping

end portions

71 and 72 can be reliably and uniformly joined. The joining accuracy of the

end portions

71 and 72 of the tire constituent member 70 can also be improved. Moreover, since the overlap part L is crushed by the joining roller 40, the

end parts

71 and 72 can be joined firmly. Even when the arrangement accuracy of the

end portions

71 and 72 before joining and the width H of the overlap portion L vary, the

end portions

71 and 72 can be overlapped and reliably joined.

Here, when the unvulcanized tire is molded, the tire constituent member 70 is wound around the molding drum 2 and then the

end portions

71 and 72 are joined. Subsequently, the bead member is arranged on the tire constituent member 70 on the molding drum 2 by a bead setter (not shown). The bead member is an annular member that includes at least a bead core and is disposed in a bead portion of an unvulcanized tire. The bead member includes, for example, a bead core and a bead filler, and is held by a bead setter. The bead setter moves concentrically with the molding drum 2 and in both axial directions of the molding drum 2. The bead setter moves along the outer periphery of the forming drum 2 while holding the bead member, and arranges the bead member on the tire constituent member 70 in which the

end portions

71 and 72 are joined to each other. The bead member is released from being held by the bead setter and is assembled at a predetermined position of the tire constituent member 70.

The moving means 10 is not limited to the above-described example, and may be configured from a bead setter. In this case, the piston / cylinder mechanism 18 and the joining unit 30 are attached to the bead setter, and the joining unit 30 is moved by the bead setter. The joining unit 30 is pressed against the

end portions

71 and 72 by the piston / cylinder mechanism 18 and moved along the

end portions

71 and 72 by the bead setter. That is, the moving means 10 is composed of a bead setter provided with a pair of joining rollers 40 and

pressing rollers

32 and 50. The moving means 10 moves the pair of joining rollers 40 and the

pressing rollers

32 and 50 along the

end portions

71 and 72 by a bead setter.

In addition, when the bead setter arranges the bead member, the

end units

71 and 72 may be joined by moving the joining unit 30. A reversing unit may be provided in the joining unit 30 to switch the joining direction S of the joining unit 30. By doing in this way, the joining unit 30 can be moved in both directions along the

end parts

71 and 72, and the

end parts

71 and 72 can be joined. Therefore, the

end portions

71 and 72 can be joined in both directions by one joining unit 30.

The example in which the tire constituent member 70 is joined on the molding drum 2 has been described above, but the tire constituent member 70 can be joined on the support body other than the molding drum 2 in the same manner as described above by using the joining device 1. . For example, the tire component 70 can be joined on a planar support member or conveyor. Two or more reinforcing rollers 50 may be arranged side by side, and the reinforcing rollers 50 may continuously reinforce the joining of the

end portions

71 and 72. When this reinforcement is unnecessary, the reinforcing roller 50 may not be provided in the joining unit 30.

DESCRIPTION OF SYMBOLS 1 ... Joining apparatus of tire structural member, 2 ... Molding drum, 10 ... Moving means, 11 ... Guide rail, 12 ... Screw shaft, 13 ... Motor, 14 ... Follower Pulley, 15 ... Drive pulley, 16 ... Belt, 17 ... Mounting bracket, 18 ... Piston / cylinder mechanism, 30 ... Joint unit, 31 ... Frame, 32 ... Presser Roller, 33, 34, 35 ... shaft member, 36, 37, 38 ... guide hole, 40 ... joining roller, 41 ... projection, 50 ... reinforcing roller, 51 ... friction surface , 60 ... fixing member, 61, 62, 63 ... biasing means, 64, 65, 66 ... displacement means, 70 ... tire constituent members, 71, 72 ... end parts, 73 ..Joint portion, 75... Recessed portion, C .. cord, CL .. center portion, L .. Overlap portion, R ··· gap, T ··· ridge.

Claims

A joining device for tire constituent members for joining ends of tire constituent members formed of rubber,
A pair of joining rollers that roll on the opposing ends of the tire constituent members to be joined and press the ends together to join them;
A pressing roller that rolls together with a pair of joining rollers and presses both ends of the tire component; and
A moving means for pressing the pair of joining rollers and the pressing roller against the end portion of the tire constituent member and moving along the end portion;
Displacement means for displacing the pressing roller according to the unevenness of the end of the tire constituent member at the pressing position;
An apparatus for joining tire constituent members, comprising:
In the joining apparatus of the tire structural member described in Claim 1,
Having a plurality of pairs of joining rollers in the moving direction by the moving means,
An apparatus for joining tire constituent members, comprising: displacement means for displacing each pair of joining rollers excluding the pair of joining rollers at the end in the moving direction according to the unevenness of the end of the tire constituent member.
In the joining apparatus of the tire structural member described in Claim 1 or 2,
A joining apparatus for tire constituent members, wherein the pressing roller is disposed in front of or behind the joining roller in the moving direction of the joining roller.
In the joining apparatus of the tire structural member described in Claim 3,
Joining of tire constituent members, wherein the pressing roller is a reinforcing roller that is disposed rearward in the moving direction and presses both end portions of the tire constituent members joined by the joining roller to reinforce the joining between the end portions. apparatus.
In the joining apparatus of the tire structural member according to any one of claims 1 to 4,
In a state where the rollers are separated from the ends of the tire constituent members, the pair of joining rollers not provided with the displacing means shifts the rollers provided with the displacing means in the direction opposite to the pressing direction by the moving means. A tire constituent member joining apparatus, wherein
In the joining apparatus of the tire structural member according to any one of claims 1 to 5,
A molding drum around which the tire constituent members to be joined are wound;
A bead setter that moves along the outer periphery of the molding drum and arranges the bead member on the tire constituent member joined at the ends,
A tire structure comprising a bead setter provided with a pair of joining rollers and a pressing roller, and the moving means moves the pair of joining rollers and the pressing roller along end portions of the tire constituent member by the bead setter. Member joining device.
A method for manufacturing a tire constituent member, which joins end portions of tire constituent members formed of rubber to manufacture a joined tire constituent member,
A step of pressing the pair of joining rollers and the pressing roller against the end of the tire constituent member and moving along the end; and
Rolling on each opposite end of the tire constituent member that joins the pair of joining rollers, and bonding the ends by pressure bonding; and
Rolling the pressing roller together with the pair of joining rollers, and pressing both ends of the tire constituent member;
A step of displacing the rolling pressing roller according to the unevenness of the end portion of the tire component at the pressing position;
The manufacturing method of the tire structural member characterized by having.
In the manufacturing method of the tire constituent member according to claim 7,
The method of manufacturing a tire constituent member, wherein the joining step includes a step of joining the end portions with each other by a pair of joining rollers.
In the manufacturing method of the tire constituent member according to claim 7,
The method of manufacturing a tire constituent member, wherein the joining step includes a step of joining the end portions with a pair of joining rollers.
In the manufacturing method of the tire constituent member according to claim 9,
The method of manufacturing a tire constituent member, wherein the step of overlapping and joining includes joining the end portions with a width of 2 mm or less.