Raw tire molding apparatus

Abstract

To provide a raw tire molding apparatus capable of reducing winding-up torque.SOLUTION: A raw tire molding apparatus 1 comprises: a molding drum 2 on which a carcass ply A is wound; a winding-up arm 5 for winding-up a protruding part Ab of the carcass play A; an arm support tool 6 that rotatably supports the winding-up arm 5; a ring member 7 for holding the winding-up arm 5 located at a standby position Y; and a moving tool 8 movable in a drum radial direction. The ring member 7 has a first slope 7a inclined outside in the drum radial direction toward the inside in a drum axial direction. The first slope 7a comes into contact with a roller 23 of the winding-up arm 5 located at the standby position Y. The moving tool 8 has a second slope 8 inclined in the same direction as that of the first slope 7a. During a period of the movement of the roller 23 from the standby position Y to the outer end 37e of the second slope 37, the outer peripheral surface 23a of the roller 23 is in contact with the first slope 7a or the second slope 37.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a green tire building apparatus. [Background technology]

[0002] The following Patent Document 1 describes a green tire building device including a shaping drum. The shaping drum has a pair of drum parts capable of holding a carcass ply including a carcass. The pair of drum parts includes a bead lock means for holding a bead core inserted around the carcass ply, and a plurality of winding arms for winding up a protruding portion of the carcass ply located axially outward of the bead core. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2011-084003 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the green tire building apparatus of Patent Document 1, there is room for consideration regarding reducing the hoisting torque for hoisting (rotating) the hoisting arm.

[0005] The present invention has been devised in view of the above circumstances, and has an object to provide a green tire building apparatus capable of reducing the hoisting torque of the hoisting arm. [Means for solving the problem]

[0006] A raw tire building device, comprising: a cylindrical building drum around which a carcass ply is wound; a plurality of winding arms for winding up a pair of protruding portions of the carcass ply that protrude outward in the drum axial direction from a pair of bead cores that are fitted around the carcass ply, outward in the drum radial direction; a pair of ring-shaped arm supports for supporting the plurality of winding arms rotatably around base ends that are outer ends of the winding arms in the drum axial direction while moving in the drum axial direction; a pair of ring members that are continuously formed in the drum circumferential direction and for holding tip ends that are inner ends of the plurality of winding arms in the drum axial direction when the winding arms are in a standby position before winding; and a pair of ring members that are arranged inside the ring members in the drum axial direction and are movable in the drum radial direction. and a pair of moving devices capable of moving the rolling elements in a direction parallel to the drum axis and in a direction parallel to the drum axis, the tips of the multiple winding arms are provided with rollers capable of contacting the inner peripheral surface of the carcass ply wound around the building drum, the ring member has a first inclined surface on the outer side in the drum axial direction that inclines radially outward toward the inner side in the drum axial direction, the first inclined surface contacts the outer peripheral surface of the roller in the standby position, the moving device has a second inclined surface on the outer side in the drum axial direction that inclines in the same direction as the first inclined surface, and while the roller moves from the standby position to the outer end of the second inclined surface in the drum radial direction, the outer peripheral surface of the roller is in contact with at least either the first inclined surface or the second inclined surface. Effect of the Invention

[0007] By employing the above-described configuration, the green tire building apparatus of the present invention can reduce the hoisting torque of the hoisting arm. [Brief description of the drawings]

[0008] [Figure 1] 1 is a side view conceptually showing an example of a green tire building line in which the green tire building apparatus of the present invention is adopted. [Diagram 2] FIG. 2 is a side view of the molding device 1. [Diagram 3] 2 is a cross-sectional view of a side surface of the drum main body 3. FIG. [Figure 4]2 is a cross-sectional view of a side surface of the drum main body 3. FIG. [Diagram 5] 5 is an enlarged view of the vicinity of the ring member 7 in FIG. 4. FIG. [Figure 6] FIG. 1A is a cross-sectional view showing a state in which a contact bead core is held, and FIG. 1B is a cross-sectional view showing a state in which the roller is wound up. [Figure 7] 4 is a cross-sectional view for explaining an inclination angle α of a first inclined surface and an inclination angle β of a second inclined surface. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The drawings include exaggerated expressions and expressions different from the dimensional ratio of the actual structure in order to facilitate understanding of the present invention. In addition, when there are multiple embodiments, the same or common elements are given the same reference numerals throughout the specification, and duplicated explanations are omitted.

[0010] Fig. 1 is a side view conceptually showing a green tire building line T including a green tire building apparatus (hereinafter sometimes simply referred to as a "building apparatus") 1 of this embodiment. As shown in Fig. 1, the green tire building line T of this embodiment includes the building apparatus 1, a carcass forming former 100, a carcass transfer device 101, a tread forming former 102, a tread transfer device 103, and a bead core transfer device (not shown). The green tire built by the building apparatus 1 is placed in a well-known vulcanization mold and vulcanized into a tire.

[0011] The carcass forming former 100 has a carcass drum 100a, and a cylindrical carcass ply A is formed by winding a sheet member for a carcass ply on the outer circumferential surface of the carcass drum 100a. The carcass transfer device 101 transfers the carcass ply A on the carcass drum 100a to the molding device 1. The tread forming former 102 has a tread drum 102a, and a cylindrical tread ring C is formed by winding tread rubber on the outer circumferential surface of the carcass ply A. The tread transfer device 103 transfers the tread ring C on the tread drum 102a to a predetermined position radially outward of the carcass ply A held by the molding device 1 and holds it. The bead core transfer device (not shown) transfers a pair of annular bead cores Bc to a predetermined position radially outward of the carcass ply A held by the molding device 1 and holds it. The bead core transfer device of this embodiment transfers the core assembly B in which the bead apex rubber Ba is placed on the outer circumferential surface of each bead core Bc. The carcass forming former 100, the carcass transfer device 101, the tread forming former 102, the tread transfer device 103, and the bead core transfer device are of known construction.

[0012] Depending on the tire structure, for example, a sidewall rubber, an inner liner rubber, a bead reinforcing layer, a clinch rubber, etc. (not shown) may be attached to the carcass ply A as appropriate. Also, depending on the tire structure, for example, a tread reinforcing ply such as a belt ply or a band ply (not shown) may be attached to the tread ring C as appropriate. Furthermore, the raw tire building line T is not limited to such an embodiment, and for example, a cylindrical carcass ply A may be formed by winding a sheet member for the carcass ply around the building device 1 (not shown).

[0013] FIG. 2 is a side view of the forming device 1. As shown in FIG. 2, the forming device 1 of this embodiment includes a cylindrical forming drum 2 around which the carcass ply A is wound. A pair of bead cores Bc are extrapolated to the carcass ply A wound around the forming drum 2. As a result, the carcass ply A wound around the forming drum 2 is divided into a main body portion Aa located between the pair of bead cores Bc and a pair of protruding portions Ab located radially outward of each bead core Bc. The carcass ply A is also divided into an outer peripheral surface A1 (shown in FIG. 4) facing radially outward in the drum direction and an inner peripheral surface A2 facing radially inward in the drum direction.

[0014] The forming drum 2 includes a pair of drum bodies 3 and a support shaft 4 supporting each drum body 3. The support shaft 4 extends, for example, horizontally. In this embodiment, the support shaft 4 is driven to rotate around an axis 4c by a motor (not shown). The rotation of the support shaft 4 rotates each drum body 3 in the same direction.

[0015] FIG. 3 is a cross-sectional view of the side of the drum body 3. FIG. 3 shows the drum body 3 on the right side of the forming device 1 in FIG. 2. Therefore, the right side of FIG. 3 is the outer side in the drum axial direction, and the left side of FIG. 3 is the inner side in the drum axial direction. As shown in FIG. 3, each drum body 3 includes a plurality of winding arms 5, a ring-shaped arm support 6, a ring member 7, and a moving member 8. In this embodiment, each drum body 3 also includes a cylindrical body portion 9 that is fitted and held on the support shaft 4. FIG. 3 shows a state in which each winding arm 5 is in a standby position Y before being wound up (before winding up).

[0016] Each cylindrical body 9 in this embodiment is movable in the drum axial direction relative to the support shaft 4 by a well-known moving mechanism (not shown). This allows each drum body 3 to move in the drum axial direction on the support shaft 4. In this embodiment, the cylindrical body 9 is attached so as to be rotatable integrally with the support shaft 4. In this specification, the "well-known moving mechanism" refers to a mechanism including a pneumatic or electric cylinder mechanism, a ball screw mechanism, or the like.

[0017] The cylindrical body 9 includes a first support part 15 that supports the arm support 6 so that it can move in the drum axial direction, a second support part 16 that supports the ring member 7, and a third support part 17 that supports the moving tool 8 so that it can move in the drum radial direction. In this way, a plurality of winding arms 5, arm supports 6, ring members 7, and moving tools 8 are placed on the cylindrical body 9 of this embodiment, and as the cylindrical body 9 moves in the drum axial direction, the winding arms 5, arm supports 6, ring members 7, and moving tools 8 move together.

[0018] The first support portion 15 includes a first outward surface 15a that faces outward in the drum radial direction and extends in the drum axial direction, and a first inner surface 15b that connects to an inner end of the first outward surface 15a in the drum axial direction. The first outward surface 15a extends parallel to the drum axial direction. In this embodiment, the first inner surface 15b extends parallel to the drum radial direction and faces outward in the drum axial direction.

[0019] The second support portion 16 includes a second outward surface 16a that faces the drum radially outward and extends in the drum axial direction, and a second inner surface 16b that is connected to the inner end of the second outward surface 16a in the drum axial direction. The second outward surface 16a extends, for example, parallel to the drum axial direction. In this embodiment, the second outward surface 16a is connected to the first inner surface 15b and is located outside the first outward surface 15a in the drum radial direction. In this embodiment, the second inner surface 16b extends parallel to the drum radial direction. The second inner surface 16b can guide the movement of the moving tool 8 in the drum radial direction.

[0020] The third support portion 17 is located on the inner side in the drum axial direction than the second inner side surface 16b and the moving tool 8. In this embodiment, the third support portion 17 includes a third outward surface 17a that faces outward in the drum radial direction and extends in the drum axial direction, and a third outer side surface 17b that is connected to the outer end of the third outward surface 17a in the drum axial direction. In this embodiment, the third outward surface 17a is located on the outer side in the drum radial direction than the second outward surface 16a. In this embodiment, the third outer side surface 17b extends parallel to the drum radial direction. The third outer side surface 17b can guide the movement of the moving tool 8 in the drum radial direction.

[0021] The cylindrical body 9 further includes a cylinder chamber 18 surrounded by the second support portion 16 and the third support portion 17, and a conical piston 19 movable in the drum axial direction within the cylinder chamber 18. The piston 19 includes a conical surface 19a that slopes inward in the drum radial direction toward the inside of the drum axial direction. The piston 19 is held by, for example, a cylinder mechanism (not shown) so as to be movable in the drum axial direction.

[0022] FIG. 4 is a cross-sectional view of the side of the drum body 3, similar to FIG. 3. As shown in FIG. 4, each winding arm 5 has a function of winding up the protruding portion Ab to the outside in the drum radial direction. In this embodiment, each winding arm 5 is spaced apart in the drum circumferential direction. Each winding arm 5 includes a base end 5a, which is an end on the outside in the drum axial direction, and a tip end 5b, which is an end on the inside in the drum axial direction. In this embodiment, the winding arm 5 includes a rising portion 20 that includes the base end 5a and rises to the outside in the drum radial direction, and an arm body portion 21 that is bent and connected to the rising portion 20 and extends to the inside in the drum axial direction. The arm body portion 21 includes the tip end 5b. As shown in the figure, in the standby position Y, the arm body portion 21 is positioned to be approximately horizontal.

[0023] A rotatable roller 23 is provided at the tip 5b of each winding arm 5. In this embodiment, a roller 23 having a known structure is adopted as the roller 23. The roller 23 has an outer peripheral surface 23a (shown in FIG. 5) that can come into contact with the inner peripheral surface A2 of the carcass ply A.

[0024] In the present embodiment, the arm body 21 is provided with a plurality of recesses 25 in the drum radial direction, which are recessed inward in the drum radial direction, in the drum axial direction. Elastic coil-shaped shrink bands 26 are wound around these recesses 25. The shrink bands 26 surround each of the winding arms 5 arranged on the drum body 3. When the winding arms 5 are being wound up, the shrink bands 26 urge each of the winding arms 5 inward in the drum radial direction, and press and join the protruding parts Ab against the body part Aa (not shown). When the winding is completed and the arm support 6 is moved outward in the drum axial direction, the shrink bands 26 return the winding arms 5, including those located below the axis 4c of the support shaft 4, to the standby position Y by their tightening force.

[0025] The arm support 6 supports the winding arm 5 so as to be rotatable around the base end 5a. In this embodiment, the arm support 6 is movable relative to the cylindrical body 9 in the drum axial direction by a known movement mechanism (not shown). The arm support 6 is held on the first outward surface 15a of the first support portion 15 so as to be movable in the drum axial direction. The arm support 6 is formed, for example, in a ring shape extending in the drum circumferential direction. By the movement of the arm support 6 toward the inside in the drum axial direction, the winding arm 5 is rotated from the standby position Y around the base end 5a in a direction in which the inside in the drum axial direction rises radially toward the outside in the drum radial direction.

[0026] Fig. 5 is an enlarged view of the vicinity of the ring member 7 in Fig. 4. As shown in Fig. 5, the ring member 7 is fixed, for example, on the second outward surface 16a of the second support portion 16. The ring member 7 moves integrally with, for example, the cylindrical body portion 9. In this embodiment, the ring member 7 is formed continuously in the drum circumferential direction.

[0027] The ring member 7 has a first inclined surface 7a on the outer side in the drum axial direction, which is inclined radially outward toward the inner side in the drum axial direction. The ring member 7 also includes, for example, a holding surface 7b connected to the inner end of the first inclined surface 7a in the drum radial direction, and an outer side surface 7c connected to the outer end of the first inclined surface 7a in the drum radial direction. In this embodiment, the holding surface 7b and the outer side surface 7c are formed at a smaller angle with respect to the drum axial direction than the first inclined surface 7a. The holding surface 7b and the outer side surface 7c may extend, for example, parallel to the drum axial direction, or may be inclined radially outward toward the inner side in the drum axial direction. The outer peripheral surface 23a of the roller 23 is in contact with the first inclined surface 7a and the holding surface 7b at the standby position Y. In this way, the ring member 7 has a function for holding the tip portion 5b of each winding arm 5 at the standby position Y before winding.

[0028] The ring member 7 also has a guide surface 7d located on the inner side in the drum axial direction. The guide surface 7d extends, for example, from the inner end of the outer surface 7c in the drum axial direction to the inner side in the drum radial direction. The guide surface 7d can guide the movement of the moving tool 8 in the drum radial direction.

[0029] 4 and 5, each moving member 8 is disposed on the inner side of the ring member 7 in the drum axial direction and is movable in the drum radial direction. Each moving member 8 is provided between the second support portion 16 and the third support portion 17. Each moving member 8 includes a plurality of segments 30 divided in the drum circumferential direction. Each moving member 8 has a contact portion 35 disposed on the outer side of each segment 30 in the drum radial direction.

[0030] In this embodiment, the contact portion 35 is made of a rubber material and is stretchable. The contact portion 35 comes into contact with the inner peripheral surface A2 of the carcass ply A. In this embodiment, the contact portion 35 includes a contact main body portion 35a held by the segment 30, and a contact protruding portion 35b that extends from the contact main body portion 35a toward the inside in the drum axial direction and has an end portion held by the third support portion 17. The contact portion 35 can hold the bead core Bc via the carcass ply A by the movement of the segment 30 toward the outside in the drum radial direction.

[0031] The segment 30 includes, for example, a first portion 31, a second portion 32, and a third portion 33. The first portion 31 in this embodiment is located radially outward of the second support portion 16. The second portion 32 is located radially inward of the first portion 31, for example, and has a longer length in the axial direction of the drum than the first portion 31. The third portion 33 is located, for example, radially inward of the first portion 31.

[0032] The first portion 31 of this embodiment includes a recess 31a into which the contact main body portion 35a is fitted, and a side surface 31b extending in the drum radial direction outward in the drum axial direction from the recess 31a. The side surface 31b has a second inclined surface 37 inclined in the same direction as the first inclined surface 7a (extending outward in the drum radial direction toward the drum axial direction inward) and a contact surface 38 that contacts the ring member 7. The second inclined surface 37 is disposed outward in the drum radial direction with respect to the contact surface 38. The second inclined surface 37 is disposed so as to be connected to the contact surface 38, for example.

[0033] In this embodiment, the second portion 32 is provided with a lifting roller 34 that can come into contact with the conical surface 19a of the piston 19. When the piston 19 moves in the drum axial direction, the lifting roller 34 can move relatively on the conical surface 19a via a well-known guide portion (not shown). This causes the segment 30 and the contact portion 35 to move in the drum radial direction. For example, when the piston 19 moves inward in the drum axial direction, the segment 30 moves outward in the drum radial direction together with the lifting roller 34, i.e., expands in diameter, and the contact portion 35 holds the bead core Bc via the carcass ply A (as shown in FIG. 6).

[0034] The third portion 33 in this embodiment is connected to a piston rod 36 extending from the second portion 32 in the drum radial direction. This allows the third portion 33 to move in the drum radial direction relative to the second portion 32. In this embodiment, the third portion 33 is movable in the drum radial direction outward from the drum radial outer end 31e of the first portion 31. The third portion 33 supports the inner surface Be of the bead core Bc in the drum axial direction via the main body portion Aa of the carcass ply A, thereby preventing the bead core Bc from being displaced inward in the drum axial direction due to the winding up of the winding arm 5.

[0035] FIG. 6(A) is a cross-sectional view showing a state in which the moving tool 8 is moved outward in the drum radial direction and the contact portion 35 holds the bead core Bc via the carcass ply A. FIG. 6(B) is a view showing a state in which each cylindrical body portion 9 is moved inward in the drum axial direction from the state of FIG. 6(A) to expand the main body portion Aa into a toroidal shape, and then the winding arm 5 is wound up so that the outer peripheral surface 23a of the roller 23 contacts the outer end 7e of the first inclined surface 7a in the drum radial direction. As shown in FIG. 5 and FIG. 6, in this embodiment, during the period in which the roller 23 moves from the standby position Y to the outer end 37e of the second inclined surface 37 in the drum radial direction, the outer peripheral surface 23a of the roller 23 contacts at least either the first inclined surface 7a or the second inclined surface 37. In other words, the outer peripheral surface 23a of the roller 23 has no opportunity to contact the contact surface 38. As a result, the roller 23 moves outward in the drum radial direction while rolling on the first inclined surface 7a and the second inclined surface 37, so the force required to move the arm support 6 inward in the drum axial direction can be made smaller than when the outer circumferential surface 23a of the roller 23 moves along a surface parallel to the drum radial direction. This makes it possible to reduce the winding torque of the winding arm 5.

[0036] FIG. 7 is a cross-sectional view for explaining the inclination angle α of the first inclined surface 7a with respect to the drum axial direction and the inclination angle β of the second inclined surface 37 with respect to the drum axial direction. For convenience, the carcass ply A and the winding arm 5 are omitted in FIG. 7. The winding torque tends to be large at the start of movement. For this reason, as shown in FIG. 7, the inclination angle α of the first inclined surface 7a is preferably smaller than the inclination angle β of the second inclined surface 37. If the inclination angle α of the first inclined surface 7a is excessively smaller than the inclination angle β of the second inclined surface 37, the winding torque between the first inclined surface 7a and the second inclined surface 37 may become excessively large. For this reason, the inclination angle α is preferably 85% to 95% of the inclination angle β. Although not particularly limited, the inclination angle α is preferably 65 degrees or more, more preferably 70 degrees or more, more preferably 85 degrees or less, and even more preferably 80 degrees or less.

[0037] Next, one embodiment of a process for forming a green tire using a green tire building line T including the building apparatus 1 (a method for forming a green tire) will be described.

[0038] First, as shown in FIG. 1, a first forming step is performed in which a sheet member for a carcass ply is wound on the outer peripheral surface of a carcass drum 100a using a carcass forming former 100 in the same manner as in the conventional method, to form a cylindrical carcass ply A. Simultaneously with the first forming step, a second forming step is performed in which a ring-shaped tread ring C is formed by sequentially winding the tread rubber on the outer peripheral surface of the tread drum 102a in the tread forming former 102. Then, a carcass transfer device 101 is used, and the cylindrical carcass ply A is received from the carcass drum 100a and transferred to the forming drum 2. Also, a tread transfer device 103 is used, and the tread ring C is received from the tread drum 102a and carried into a predetermined position on the outer side of the drum radial direction of the forming drum 2.

[0039] Next, a pair of bead cores Bc are arranged at the drum radial outside of the cylindrical carcass ply A held by the forming drum 2 and at the position of the moving tool 8. In this embodiment, a bead apex rubber Ba is previously attached integrally to the outer circumferential surface of the bead core Bc. Then, as shown in FIG. 6(A), the piston 19 is moved inward in the drum axial direction to expand the diameter of the moving tool 8 (segments 30 and contact portion 35), thereby performing a locking process to fix the bead core Bc via the carcass ply A. At this time, the piston rod 36 is extended, and the third portion 33 is moved outward in the drum radial direction from the inner end of the bead core Bc in the drum radial direction, so that the inner surface Be of the bead core Bc and the outer circumferential surface A1 of the main body portion Aa come into contact with each other.

[0040] Next, as shown in Fig. 6(B), a shaping process is performed in which each bead core Bc is moved inward in the drum axial direction while being filled with internal pressure to expand the main body portion Aa into a toroidal shape. Then, a joining process is performed in which the expanded portion of the main body portion Aa is pressed against the inner peripheral surface of the tread ring C to join them.

[0041] Next, a winding process is performed in which the protruding portion Ab is wound up using the winding arm 5. In this winding process, the arm support 6 is moved inward in the drum axial direction, so that the roller 23, after climbing the first inclined surface 7a, climbs the second inclined surface 37 without coming into contact with the contact surface 38. This makes it possible to reduce the force required to move the arm support 6 inward in the drum axial direction, compared to the case where the roller 23 is wound up through the first inclined surface 7a, at least a part of the contact surface 38, and the second inclined surface 37. This makes it possible to reduce the winding torque of the winding arm 5. Specifically, when the roller 23 climbs the first inclined surface 7a and then climbs the second inclined surface 37 without coming into contact with the contact surface 38, the winding torque can be reduced by 50% or more, compared to the case where the roller 23 climbs the first inclined surface 7a, at least a part of the contact surface 38, and the second inclined surface 37. The winding torque is specified, for example, by the output required to move the arm support 6 inward in the drum axial direction.

[0042] Then, by further moving the arm support 6 inward in the drum axial direction, the roller 23 moves from the inner side to the outer side in the drum radial direction along the bead apex rubber Ba and the main body portion Aa, and in the process, rolls up the protruding portion Ab and presses it against the main body portion Aa. After all of the protruding portion Ab has been rolled up, the arm support 6 is moved outward in the drum axial direction, thereby returning the winding arm 5 to the standby position Y. In this manner, the green tire is built. Note that the process of building a green tire using the green tire building line T including the building device 1 is not limited to this embodiment.

[0043] Although a particularly preferred embodiment of the present invention has been described in detail above, the present invention is not limited to the illustrated embodiment and can be modified and carried out in various forms.

[0044] [Note] The present invention includes the following aspects.

[0045] [Invention 1] A green tire building apparatus comprising: A cylindrical forming drum around which the carcass ply is wound; a plurality of winding arms for winding up a pair of protruding portions of the carcass ply, the protruding portions protruding outward in the axial direction of the drum from a pair of bead cores that are fitted around the carcass ply, toward the radial direction of the drum; a pair of ring-shaped arm supports that support the plurality of winding arms rotatably around base ends of the winding arms, the base ends being outer ends of the winding arms in the drum axial direction, while moving in the drum axial direction; a pair of ring members formed continuously in a drum circumferential direction for holding tip ends of the plurality of winding arms on the inner side in the drum axial direction when the winding arms are in a standby position before winding; a pair of moving members arranged on the inner side of the ring member in the drum axial direction and movable in the drum radial direction, A roller capable of contacting an inner circumferential surface of the carcass ply wound around the forming drum is provided at the tip end of each of the plurality of winding arms, The ring member has a first inclined surface on an outer side in the drum axial direction, the first inclined surface inclining toward an inner side in the drum axial direction and toward an outer side in the drum radial direction, the first inclined surface contacts an outer circumferential surface of the roller in the standby position, The moving tool has a second inclined surface on an outer side in the drum axial direction, the second inclined surface being inclined in the same direction as the first inclined surface, During the time when the roller moves from the standby position to the outer end of the second inclined surface in the drum radial direction, the outer circumferential surface of the roller is in contact with at least either the first inclined surface or the second inclined surface. Green tire building equipment. [Invention 2] the moving tool has a contact surface on an outer side in the drum axial direction that contacts the ring member, The green tire building apparatus according to present invention 1, wherein the second inclined surface is disposed on the outer side in the drum radial direction with respect to the contact surface. [Invention 3] The green tire building apparatus according to claim 1 or 2, wherein the pair of moving tools are capable of holding the pair of bead cores via the carcass ply by pushing the inner circumferential surface of the carcass ply outward in the drum radial direction. [Invention 4] The green tire building apparatus according to present invention 1, wherein the pair of ring members have guide surfaces on the inner side in the drum axial direction for guiding the moving tool which moves in the drum radial direction. [Invention 5] The pair of moving tools includes a plurality of segments divided in the drum circumferential direction, The green tire building apparatus according to present invention 1, wherein the contact surface and the second inclined surface are formed on the plurality of segments. [Invention 6] The pair of moving tools has contact portions that contact the carcass ply, The green tire building apparatus according to the present invention 5, wherein the contact portion is disposed on an outer side of the plurality of segments in a radial direction of the drum. [Invention 7] The green tire building apparatus according to present invention 1, wherein an inclination angle α of the first inclined surface with respect to the drum axial direction is smaller than an inclination angle β of the second inclined surface with respect to the drum axial direction. [Invention 8] 8. The green tire building apparatus according to claim 7, wherein the inclination angle α is 85% to 95% of the inclination angle β. [Explanation of symbols]

[0046] 1. Green tire building equipment 2. Forming drum 5. Winding arm 5a Proximal end 5b Tip 6 Arm Support 7 Ring member 7a 1st slope 8. Transportation 23 Roller 23a Outer surface 37 Second slope A Carcass ply A2 Inner surface Ab protruding part Bc bead core Y Standby position

Claims

1. A green tire building apparatus comprising: A cylindrical forming drum around which the carcass ply is wound; a plurality of winding arms for winding up a pair of protruding portions of the carcass ply, the protruding portions protruding outward in the axial direction of the drum from a pair of bead cores that are fitted around the carcass ply, toward the radial direction of the drum; a pair of ring-shaped arm supports that support the plurality of winding arms rotatably around base ends of the winding arms, the base ends being outer ends of the winding arms in the drum axial direction, while moving in the drum axial direction; a pair of ring members formed continuously in a drum circumferential direction for holding tip ends of the plurality of winding arms on the inner side in the drum axial direction when the winding arms are in a standby position before winding; a pair of moving members arranged on the inner side of the ring member in the drum axial direction and movable in the drum radial direction, A roller capable of contacting an inner circumferential surface of the carcass ply wound around the forming drum is provided at the tip end of each of the plurality of winding arms, The ring member has a first inclined surface on an outer side in the drum axial direction, the first inclined surface inclining toward an inner side in the drum axial direction and toward an outer side in the drum radial direction, the first inclined surface contacts an outer circumferential surface of the roller in the standby position; The moving tool has a second inclined surface on an outer side in the drum axial direction, the second inclined surface being inclined in the same direction as the first inclined surface, During the time when the roller moves from the standby position to the outer end of the second inclined surface in the drum radial direction, the outer circumferential surface of the roller is in contact with at least either the first inclined surface or the second inclined surface. Green tire building equipment.

2. the moving tool has a contact surface on an outer side in the drum axial direction that contacts the ring member, The green tire building apparatus according to claim 1 , wherein the second inclined surface is disposed on an outer side in a drum radial direction with respect to the contact surface.

3. The green tire building apparatus according to claim 1 , wherein the pair of moving tools are capable of holding the pair of bead cores via the carcass ply by pressing the inner circumferential surface of the carcass ply outward in the drum radial direction.

4. The green tire building apparatus according to claim 1 , wherein the pair of ring members have guide surfaces on inner sides in the drum axial direction for guiding the moving tool which moves in the drum radial direction.

5. The pair of moving tools includes a plurality of segments divided in the drum circumferential direction, The green tire building apparatus according to claim 1 , wherein the contact surface and the second inclined surface are formed on the plurality of segments.

6. The pair of moving tools has contact portions that contact the carcass ply, The green tire building apparatus according to claim 5 , wherein the contact portion is disposed on an outer side of the plurality of segments in a radial direction of the drum.

7. 2. The green tire building apparatus according to claim 1, wherein an inclination angle α of the first inclined surface with respect to the drum axial direction is smaller than an inclination angle β of the second inclined surface with respect to the drum axial direction.

8. 8. The green tire building apparatus according to claim 7, wherein the inclination angle α is 85% to 95% of the inclination angle β.

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