Raw tire building equipment

Abstract

To provide a green tire molding apparatus capable of achieving both a bladder winding mechanism and a mechanical winding mechanism in one molding apparatus.SOLUTION: A green tire molding apparatus 1 comprises: a cylindrical molding drum 2; a winding tool 4 for winding a tire member; and a driving tool 7 for moving the winding tool 4 in a drum axial direction. The winding tool 4 is configured so that a first winding tool 5 including a bladder 51 and a ring member 52 or a second winding tool 6 including a slide member 61 and a winding arm 62 can be selectively mounted. The driving tool includes a pressing member for pressing the bladder. The pressing member is provided with a plurality of contact members that come into contact with the slide member to move the slide member inwardly in a drum axial direction. The contact members are distributed at equal intervals in a circumferential direction of the drum.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] BACKGROUND ART Conventionally, a green tire building apparatus having a bladder hoisting mechanism that hoists a tire component using a bladder is known (see, for example, Patent Document 1).

[0003] On the other hand, a green tire building apparatus is known that has a mechanical hoisting mechanism that hoists up tire components using a hoisting arm (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-101971 [Patent Document 2] Japanese Patent Application Laid-Open No. 2009-154471 Summary of the Invention [Problem to be solved by the invention]

[0005] Because the bladder winding mechanism and the mechanical winding mechanism have very different configurations, it was difficult to combine them in a single molding device.

[0006] The present disclosure has been devised in consideration of the above-described circumstances, and its main object is to provide a green tire building apparatus that can combine a bladder winding mechanism and a mechanical winding mechanism in a single building apparatus. [Means for solving the problem]

[0007] The present disclosure relates to a green tire building device including a cylindrical building drum around which tire components including a carcass ply are wound, a pair of bead core holders arranged on both outer sides of the building drum in the drum axial direction so as to be able to hold inner circumferential surfaces of a pair of bead cores inserted around the tire component via the tire component, hoisting devices arranged on both outer sides of the pair of bead core holders and for rolling up a pair of protruding portions of the tire component that protrude outward in the drum axial direction from the bead cores, outward in the drum radial direction, and a pair of driving devices for moving the hoisting devices in the drum axial direction, wherein the hoisting devices expand to roll up the pair of protruding portions outward in the drum radial direction, and are moved inward in the drum axial direction by the driving devices, thereby rolling up the protruding portions inward in the drum axial direction. and a ring member that is driven inward in the drum axial direction by the driving tool to press the expanded bladders inward in the drum axial direction, or a second winding device that includes a pair of slide members that can be moved in the drum axial direction by the driving tool and a plurality of winding arms that roll up the pair of protruding portions as the slide members move in the drum axial direction. The driving tool is arranged coaxially with the forming drum and includes a pair of pressing members that move in the drum axial direction to press the bladders inward in the drum axial direction, and each pressing member is provided with a plurality of abutting members that come into contact with the slide members to move the slide members inward in the drum axial direction when the protruding portions are rolled up. [Effects of the Invention]

[0008] In the green tire building apparatus of the present disclosure, the hoisting device is configured so that either the first hoisting device including the bladder or the second hoisting device including the hoisting arm can be selectively attached, thereby enabling both a bladder hoisting mechanism and a mechanical hoisting mechanism to be implemented in a single building apparatus. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a front view showing an outline of an embodiment of a green tire building apparatus according to the present disclosure. [Figure 2] FIG. 2 is a front view showing the green tire building apparatus in a state before winding in which the first winding tool is attached. [Figure 3] FIG. 2 is a front view showing the green tire building apparatus in a winding state with the first winding tool attached. [Figure 4] FIG. 2 is a front view showing the green tire building apparatus in a state before winding with a second winding tool attached. [Figure 5] FIG. 2 is a front view showing the green tire building apparatus in a winding state with the second winding tool attached. [Figure 6] FIG. 1 is a perspective view showing an example of a driving tool together with a forming drum. [Figure 7] 1 is a side view of the main parts of the green tire building apparatus with the upper arm member and the lower arm member closed. FIG. [Figure 8] FIG. 2 is a plan view of the main part of the green tire building apparatus with the second winding tool attached. [Figure 9] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. Fig. 1 is a front view of a green tire building apparatus 1 of this embodiment. As shown in Fig. 1, the green tire building apparatus 1 includes a cylindrical building drum 2, a pair of bead core holders 3 arranged on both outer sides of the building drum 2 in the drum axial direction, hoisting tools 4 arranged on both outer sides of the pair of bead core holders 3, and a pair of driving tools 7 that drive the hoisting tools 4.

[0011] A tire component 100 including a carcass ply is wound around the forming drum 2. The tire component 100 is composed of, in addition to the carcass ply, for example, an inner liner rubber, a clinch rubber, a sidewall rubber, etc. The forming drum 2 has a base member 21 to which the other end 51b of a bladder 51 and a slide member 61, which will be described later, are attached.

[0012] A pair of bead cores 110 are fitted onto the tire member 100. The bead cores 110 are arranged one on each side of the tire member 100 in the drum axial direction.

[0013] The bead core holder 3 is configured to be able to hold the inner circumferential surface of the bead core 110 via the tire component 100. The bead core holder 3 is disposed symmetrically with respect to the center of the tire component 100 in the drum axial direction, i.e., the equator C. The bead core holder 3 moves outward in the drum radial direction, expanding the tire component 100 outward in the drum radial direction and holding the inner circumferential surface of the bead core 110. The bead core holder 3 is configured to be able to move in the drum axial direction while holding the bead core 110.

[0014] The bead core 110 is disposed inside the outer end of the tire component 100 in the drum axial direction. Therefore, the tire component 100 has a pair of protruding portions 102 that protrude outside the bead core 110 in the drum axial direction. The protruding portions 102 include, for example, sidewall rubber.

[0015] The hoisting tool 4 hoists a pair of protruding portions 102 of the tire member 100 radially outward of the drum. By hoisting the protruding portions 102 with the hoisting tool 4, the sidewall rubber is disposed on the outer side of the carcass ply in the drum axial direction.

[0016] The driving tool 7 moves the hoisting tool 4 in the drum axial direction. The driving tool 7 may be divided circumferentially by dividing lines extending radially. The position of the driving tool 7 in the drum axial direction is detected, for example, by an encoder (not shown). The output signal of the encoder is input to a control unit of the green tire building apparatus 1. The control unit controls the driving tool 7 based on the output signal of the encoder. The hoisting tool 4 is then driven inward in the drum axial direction by the driving tool 7, thereby hoisting up the protruding portion 102.

[0017] In the green tire building apparatus 1 of this embodiment, a pair of first hoisting tools 5 or a pair of second hoisting tools 6 can be selectively attached as the hoisting tools 4.

[0018] 2 and 3 show the green tire building apparatus 1 with the first winding tool 5 attached. Of these, Fig. 2 shows the green tire building apparatus 1 before winding, and Fig. 3 shows the green tire building apparatus 1 during winding.

[0019] The first winding tool 5 includes a pair of cylindrical bladders 51 and a ring member 52 that presses the bladders 51 inward in the drum axial direction. The bladders 51 and the ring member 52 are arranged coaxially with the forming drum 2.

[0020] One end 51a of the bladder 51 is fixed to the forming drum 2, on the inside of the bead core holder 3 in the drum axial direction. The other end 51b of the bladder 51 is attached to the forming drum 2 via a pair of base members 21, on the outside of the bead core holder 3 in the drum axial direction. The other end 51b of the bladder 51 is supported by the base members 21 so as to be movable in the drum axial direction. When the bladder 51 expands, the other end 51b moves inward in the drum axial direction.

[0021] The bladders 51 are arranged inside the pair of protruding portions 102 of the tire member 100 in the drum radial direction. The pair of bladders 51 expand due to the air pressure filled therein, and roll up the pair of protruding portions 102 outside in the drum radial direction.

[0022] 3, when the bladder 51 expands, the bead core holder 3 moves inward in the drum axial direction, and air fills the inside of the main body portion 101 of the tire component 100 sandwiched between a pair of bead cores 110. This causes the main body portion 101 of the tire component 100 to expand outward in the drum radial direction. Then, the main body portion 101 and the protruding portion 102 of the tire component 100 are fixed together, and a sidewall portion is formed from the bead portion of the green tire.

[0023] The ring member 52 is driven inward in the drum axial direction by the driving tool 7, approaches the bead core holder 3, and presses the expanded bladder 51 inward in the drum axial direction. As a result, both ends of the protruding portion 102 are tightly attached to the main body portion 101.

[0024] After the protruding portion 102 is rolled up, the other end 51b and the driving tool 7 move outward in the drum axial direction, and accordingly, the bladder 51 and the ring member 52 return to the initial state shown in FIG.

[0025] The first winding tool 5 is attached to the green tire building apparatus 1 in the following manner. That is, one end 51a of the bladder 51 is fixed to the building drum 2, and the other end 51b is attached to the base member 21 of the building drum 2. Then, the ring member 52 is fixed to the driving tool 7.

[0026] On the other hand, the first winding tool 5 can be removed from the green tire building apparatus 1 in the reverse manner. That is, one end 51a and the other end 51b of the bladder 51 are removed from the building drum 2, and the ring member 52 is removed from the driving tool 7. By removing the first winding tool 5 from the green tire building apparatus 1, the second winding tool 6 can be attached to the green tire building apparatus 1.

[0027] 4 and 5 show the green tire building apparatus 1 with the second hoisting tool 6 attached. Of these, Fig. 4 shows the green tire building apparatus 1 before hoisting, and Fig. 5 shows the green tire building apparatus 1 during hoisting.

[0028] The second winding device 6 includes a pair of slide members 61 and a winding arm 62 that winds up the pair of protruding portions 102.

[0029] The slide member 61 is attached to the forming drum 2 via a pair of base members 21. The slide member 61 is supported by the base members 21 so as to be movable in the drum axial direction. The base members 21 may have a groove formed in the drum axial direction for supporting the other end 51b of the bladder 51 and the slide member 61.

[0030] The slide member 61 is driven inward in the drum axial direction by the driving tool 7 to approach the bead core holder 3. A rotation shaft 64 of a hoisting arm 62 is provided on the slide member 61. The hoisting arm 62 is supported at its outer end in the drum axial direction so as to be rotatable about the rotation shaft 64.

[0031] A plurality of hoisting arms 62 are provided in the drum circumferential direction. The inner tip ends of the hoisting arms 62 in the drum axial direction are arranged inside the pair of protruding portions 102 of the tire member 100 in the drum radial direction.

[0032] As shown in FIG. 5, as the slide member 61 moves inward in the drum axial direction, the winding arm 62 rotates so that its tip moves outward in the drum radial direction, winding up the protruding portion 102.

[0033] When the hoisting arm 62 rotates, the bead core holder 3 moves in the drum axial direction, and air is filled inside the main body portion 101 of the tire component 100 sandwiched between a pair of bead cores 110. This causes the main body portion 101 of the tire component 100 to expand outward in the drum radial direction. Then, the main body portion 101 and the protruding portion 102 of the tire component 100 are fixed together, and a sidewall portion is formed from the bead portion of the green tire.

[0034] It is desirable to provide a roller 65 at the tip of the winding arm 62. The roller 65 rotates when the winding arm 62 operates, thereby allowing the protruding portion 102 to be smoothly wound up.

[0035] After the protruding portion 102 is wound up, the driving tool 7 moves outward in the drum axial direction, and accordingly, the slide member 61 and the winding arm 62 return to the initial state shown in FIG.

[0036] The second hoisting tool 6 is attached to the green tire building apparatus 1 by attaching the slide member 61 to the base member 21 of the building drum 2. The base end of the hoisting arm 62 is supported by the slide member 61 in advance.

[0037] Conversely, the second winding tool 6 can be removed from the green tire building apparatus 1 by removing the slide member 61 from the base member 21 of the building drum 2. This makes it possible to attach the first winding tool 5 to the green tire building apparatus 1.

[0038] In this raw tire building apparatus 1, the hoisting tool 4 is configured so that either a first hoisting tool 5 including a bladder 51 and a ring member 52, or a second hoisting tool 6 including a slide member 61 and a hoisting arm 62 can be selectively attached. This makes it possible to have both a bladder hoisting mechanism and a mechanical hoisting mechanism in a single building apparatus.

[0039] Therefore, the variety of green tires that can be built using a single green tire building apparatus increases, and it becomes possible to manufacture a wide variety of green tires using a small facility footprint.

[0040] The driving tool 7 includes a pair of pressing members 71. The inner diameter of the pressing members 71 is set to be larger than the outer diameter of the forming drum 2. The pressing members 71 are arranged coaxially with the forming drum 2. The pressing members 71 move in the drum axial direction.

[0041] The inner end of the pressing member 71 in the drum axial direction is configured so that the ring member 52 can be attached. When the first winding tool 5 is attached to the raw tire building apparatus 1, the pressing member 71 presses the bladder 51 inward in the drum axial direction via the ring member 52.

[0042] The outer end of the pressing member 71 in the drum axial direction is provided with a plurality of contact members 72 that can come into contact with the outer end of the slide member 61 in the drum axial direction. The contact members 72 protrude inward from the pressing member 71 in the drum radial direction.

[0043] When the second winding tool 6 is attached to the green tire building apparatus 1, the contact member 72 moves the slide member 61 inward in the drum axial direction. Accordingly, the winding arm 62 winds up the protruding portion 102.

[0044] 2 and 3, when the first winding tool 5 is attached to the green tire building apparatus 1, the slide member 61 is detached from the base member 21, and therefore there is no risk that the presence of the abutting member 72 will interfere with the operation of the first winding tool 5. Therefore, the abutting member 72 may remain attached to the pressing member 71. In other words, considering the man-hours required for replacing the first winding tool 5 with the second winding tool 6 and replacing the second winding tool 6 with the first winding tool 5, it is desirable that the abutting member 72 be always attached to the pressing member 71, regardless of whether the first winding tool 5 or the second winding tool 6 is attached.

[0045] Incidentally, particularly when the second hoisting tool 6 including the hoisting arm 62 is attached to the green tire building apparatus 1, an extremely large force is applied to the movement of the driving tool 7 when winding up the protruding portion 102. If such a force causes deformation such as bending of the driving tool 7 itself, a moment is generated in the pressing member 71, and the pressing member 71 moves in an attitude tilted with respect to the drum axial direction, causing the winding up of the protruding portion 102 to be uneven in the drum circumferential direction.

[0046] Therefore, in the green tire building apparatus 1, the contact members 72 are disposed at equal intervals around the drum circumferentially. Here, "distributed at equal intervals" means that when n (n is an integer) contact members 72 are provided on the pressing member 71 on one side in the drum axial direction, the contact members 72 are disposed at an angle of (360 / n)±m° around the drum axis. The angle m° is an adjustment angle for avoiding the divided positions when the pressing member 71 is configured to be divided in the circumferential direction, or an adjustment angle for avoiding interference with other components provided at the 360 / n° divided positions on the pressing member 71, and is preferably 10° or less, for example.

[0047] Because the contact members 72 are disposed at equal intervals in the drum circumferential direction, even if the driving tool 7 is deflected when the first winding tool 5 or the second winding tool 6 is moved in the drum axial direction, the pressing member 71 moves while maintaining a constant posture in the drum axial direction without generating a moment, i.e., while maintaining a coaxial state with the building drum 2. As a result, the slide member 61 also moves while maintaining a coaxial state with the building drum 2 without generating a moment. The protruding portion 102 is wound up uniformly in the drum circumferential direction, improving the uniformity performance of the green tire and, ultimately, the vulcanized tire.

[0048] It is desirable that each abutment member 72 be configured to press the slide member 61 with equal force. Such a configuration can be easily achieved by distributing the abutment members 72 at equal intervals around the drum circumference. Furthermore, when the deformation of the driver 7 is large, this can also be achieved by individually adjusting the position of each abutment member 72 in the axial direction of the drum. More specifically, when there is a contact member 72 whose pressing force against the slide member 61 increases due to deformation of the driver 7, the force pressing the slide member 61 can be adjusted by disposing the contact member 72 at a position retreated from the slide member 61, i.e., at an outer position in the axial direction of the drum.

[0049] 6 shows an example of the driving tool 7 together with the forming drum 2. The driving tool 7 is disposed on each side of the forming drum 2 in the drum axial direction. The driving tool 7 includes a pressing member 71 and an arm member 73.

[0050] The arm member 73 extends outward from the pressing member 71 in the drum radial direction and cantilevers the pressing member 71. The arm member 73 in this embodiment extends rearward when viewed from the front of the forming drum 2. With this configuration, the space generated in front of the forming drum 2 can be effectively utilized.

[0051] Each pressing member 71 and each arm member 73 is divided into two parts, upper and lower, on a plane including the drum shaft 20. That is, the pressing member 71 is divided into an upper pressing member 71a and a lower pressing member 71b. Similarly, the arm member 73 is divided into an upper arm member 73a and a lower arm member 73b.

[0052] The upper arm member 73a and the lower arm member 73b are configured to be able to move in conjunction with each other in the height direction D2. When the upper arm member 73a moves upward, the lower arm member 73b moves downward. When the upper arm member 73a moves downward, the lower arm member 73b moves upward.

[0053] The upper arm member 73a and the lower arm member 73b are configured to be able to move in conjunction with each other in the front-to-rear direction D3. In a state in which the upper arm member 73a is positioned above the forming drum 2 and the lower arm member 73b is positioned below the forming drum 2 (open state), the upper arm member 73a and the lower arm member 73b move in the front-to-rear direction D3. This causes the arm member 73 to move from the standby position to the forming position relative to the forming drum 2, or from the forming position to the standby position.

[0054] Each of the upper pressing member 71a and the lower pressing member 71b is provided with a contact member 72 (not shown). The sum of the forces with which the contact members 72 provided on the upper pressing member 71a press the slide member 61 is set to be equal to the sum of the forces with which the contact members 72 provided on the lower pressing member 71b press the slide member 61. This setting can be easily achieved by individually adjusting the position of each contact member 72 in the drum axial direction.

[0055] By setting the sum of the forces exerted by the contact members 72 of the upper pressing member 71a and the sum of the forces exerted by the contact members 72 of the lower pressing member 71b to be equal, the slide member 61 moves without generating any moment, while maintaining a coaxial state with the building drum 2. This allows the protruding portion 102 to be rolled up uniformly in the circumferential direction of the drum, improving the uniformity performance of the green tire and, ultimately, the vulcanized tire.

[0056] It is desirable that the abutment members 72 are disposed symmetrically with respect to the drum shaft 20. This allows the slide member 61 to move while maintaining a coaxial state with the building drum 2 without generating a moment, and similarly to the above, the protruding portion 102 is rolled up uniformly in the drum circumferential direction, improving the uniformity performance of the green tire and, ultimately, the vulcanized tire.

[0057] FIG. 7 is a side view of the main part of the green tire building apparatus 1 when the upper arm member 73a and the lower arm member 73b are closed, as viewed from the outside in the drum axial direction.

[0058] 8 is a plan view of the main parts of the green tire building apparatus 1 equipped with the second hoisting tool 6, viewed from above. In the figure, the driving tool 7 before the hoisting operation is depicted by a two-dot chain line, and the driving tool 7 during the hoisting operation is depicted by a solid line. In the figure, a contact member 72Z is ​​disposed around the entire circumference of the pressing member 71 below the equator C, and a contact member 72 is disposed immediately above and immediately below the drum shaft 20 of the building drum 2 on the pressing member 71 above the equator C.

[0059] 7 and 8, the contact members 72 are preferably disposed directly above and directly below the drum shaft 20 of the forming drum 2. As shown by the solid line in Fig. 8, during the winding-up operation, the arm members 73 of the driving tool 7 are driven inward in the drum shaft direction and are deformed by the reaction force from the slide member 61 (for the sake of explanation, the deformation of the driving tool 7 during the winding-up operation is exaggerated in the drawing). At this time, the pressing member 71 moves inward in the drum shaft direction in an attitude tilted with respect to the drum shaft 20 of the forming drum 2.

[0060] In a configuration in which the abutting member 72Z is ​​disposed around the entire circumference of the pressing member 71, as shown in the lower part of Fig. 8, the entire outer end of the slide member 61 abuts against the abutting member 72Z in the drum axial direction and is pressed inward in the drum axial direction. At this time, since the attitude of the pressing member 71 is tilted with respect to the drum shaft 20, the force with which the pressing member 71 presses the slide member 61 becomes uneven around the circumference (in Fig. 8, the force is larger near the arm member 73), a moment is generated in the slide member 61, and the axis of the slide member 61 deviates from the drum shaft 20. With the slide member 61 in such an attitude, the rotation axis 64 of the hoist arm 62 becomes uneven in the drum circumferential direction, and the winding up of the protruding portion 102 becomes uneven in the drum circumferential direction, which deteriorates the uniformity performance of the green tire and, ultimately, the vulcanized tire.

[0061] However, in the green tire building apparatus 1 of the present disclosure, as shown in the lower part of Fig. 8, the abutment members 72 are disposed directly above and directly below the drum shaft 20. This allows the slide member 61 to move while maintaining a coaxial state with the building drum 2 without generating a moment. This allows the protruding portion 102 to be rolled up evenly in the drum circumferential direction, improving the uniformity performance of the green tire and, ultimately, the vulcanized tire.

[0062] FIG. 9 shows a cross section of the pressing member 71. It is desirable that the pressing member 71 have a closed cross-sectional shape and extend in the circumferential direction. Such a pressing member 71 is lightweight and highly rigid, and when the first winding tool 5 is attached to the green tire building apparatus 1, it drives the ring member 52 with a force that is uniform around the circumference. This allows the bladder 51 and the ring member 52 to move while maintaining a coaxial state with the building drum 2 without generating a moment. Therefore, the protruding portion 102 is wound up uniformly around the drum, improving the uniformity performance of the green tire and, ultimately, the vulcanized tire. Furthermore, the closed cross-sectional shape increases the strength of the pressing member 71, improving its durability and improving the production efficiency of green tires.

[0063] The pressing member 71 is preferably formed to have a trapezoidal closed cross section in which the inner diameter DM1 of the inner end of the drum in the axial direction is larger than the inner diameter DM2 of the outer end of the drum in the axial direction. This pressing member 71 easily expands the range of motion of the hoisting arm 62 when the second hoisting tool 6 is attached to the green tire building apparatus 1. Therefore, it becomes possible to produce green tires with large outer diameters without replacing the pressing member 71, improving the production efficiency of green tires.

[0064] The green tire building apparatus 1 of the present disclosure has been described in detail above, but the present disclosure is not limited to the specific embodiments described above and can be modified and implemented in various aspects.

[0065] [Note] The present disclosure includes the following aspects.

[0066] [Disclosure 1] A green tire building apparatus, a cylindrical forming drum around which tire components including a carcass ply are wound; a pair of bead core holders disposed on both outer sides in the drum axial direction of the building drum so as to hold inner circumferential surfaces of a pair of bead cores extrapolated to the tire member via the tire member; a hoisting device disposed on both outer sides of the pair of bead core holders and configured to hoist a pair of protruding portions of the tire member protruding outward in the drum axial direction from the bead core toward the outer side in the drum radial direction; a pair of driving devices for moving the hoisting device in the drum axial direction, The hoisting device is a first winding device including a pair of bladders that expand to wind up the pair of protruding portions radially outward and are moved inward in the drum axial direction by the driving tool to press the protruding portions inward in the drum axial direction, and a ring member that is driven inward in the drum axial direction by the driving tool to press the expanded bladders inward in the drum axial direction; or a second hoisting device including a slide member that can be moved in the drum axial direction by the driving tool and a plurality of hoisting arms that hoist the pair of protruding portions as the slide member moves in the drum axial direction; It is configured to be selectively mountable, the driving tool includes a pair of pressing members that are arranged coaxially with the forming drum and move in the drum axial direction to press the bladder inward in the drum axial direction, each pressing member is provided with a plurality of abutment members that come into contact with the slide member when the protruding portion is wound up, thereby moving the slide member inward in the drum axial direction; Green tire molding equipment. [Disclosure 2] The green tire building apparatus according to Disclosure 1, wherein the contact members are disposed at equal intervals in a circumferential direction of the drum. [Disclosure 3] The green tire building apparatus according to Disclosure 1 or 2, wherein each abutting member presses the slide member with an equal force. [Disclosure 4] The green tire building apparatus according to any one of Disclosures 1 to 3, wherein the driving tool includes an arm member that extends from the pressing member in the drum radial direction and supports the pressing member in a cantilever manner. [Disclosure 5] The green tire building apparatus according to Disclosure 4, wherein the pressing member and the arm member are divided into two, upper and lower, by a plane including the drum shaft, and the sum of the forces of the contact members provided on the upper pressing member is equal to the sum of the forces of the contact members provided on the lower pressing member. [Disclosure 6] The green tire building apparatus according to Disclosure 5, wherein the contact members are arranged symmetrically with respect to the drum axis. [Disclosure 7] The green tire building apparatus according to Disclosure 6, wherein the contact members are disposed immediately above and immediately below the drum shaft. [Disclosure 8] The green tire building apparatus according to any one of Disclosures 1 to 7, wherein the pressing member has a closed cross-sectional shape and extends in the circumferential direction. [Disclosure 9] The green tire building apparatus according to Disclosure 8, wherein the closed cross-sectional shape is a trapezoid in which the inner diameter of the inner end of the drum in the axial direction is larger than the inner diameter of the outer end of the drum in the axial direction. [Explanation of symbols]

[0067] 1: Raw tire building equipment 2: Forming drum 3: Bead core holder 4: Hoisting device 5: First roll upper part 6: Second roll 7: Drive tool 20: Drum shaft 51: Bladder 52: Ring member 61: Slide member 62: Hoisting arm 71: Pressing member 71a: Upper pressing member 71b: Lower pressing member 72: Joint material 72: Contact member 73: Arm member 73a: Upper arm member 73b: Lower arm member 100: Tire components 102: Exit section 110: Bead core D1: Drum axis direction DM1: Inner diameter DM2: Inner diameter

Claims

1. A green tire building apparatus, a cylindrical forming drum around which tire components including a carcass ply are wound; a pair of bead core holders disposed on both outer sides in the drum axial direction of the building drum so as to hold inner circumferential surfaces of a pair of bead cores extrapolated to the tire member via the tire member; a hoisting device disposed on both outer sides of the pair of bead core holders and configured to hoist a pair of protruding portions of the tire member protruding outward in the drum axial direction from the bead core toward the outer side in the drum radial direction; a pair of driving devices for moving the hoisting device in the drum axial direction, The hoisting device is a first winding device including a pair of bladders that expand to wind up the pair of protruding portions radially outward and are moved inward in the drum axial direction by the driving tool to press the protruding portions inward in the drum axial direction, and a ring member that is driven inward in the drum axial direction by the driving tool to press the expanded bladders inward in the drum axial direction; or a second hoisting device including a slide member that can be moved in the drum axial direction by the driving tool, and a plurality of hoisting arms that hoist the pair of protruding portions as the slide member moves in the drum axial direction; It is configured to be selectively mountable, the driving tool includes a pair of pressing members that are arranged coaxially with the forming drum and move in the drum axial direction to press the bladder inward in the drum axial direction, Each pressing member is provided with a plurality of contact members that come into contact with the slide member when the protruding portion is wound up, thereby moving the slide member inward in the drum axial direction. Green tire molding equipment.

2. The green tire building apparatus according to claim 1 , wherein the contact members are disposed at equal intervals in the circumferential direction of the drum.

3. 3. The green tire building apparatus according to claim 1, wherein each of the contact members presses the slide member with an equal force.

4. 4. The green tire building apparatus according to claim 1, wherein the driving tool includes an arm member that extends from the pressing member in the drum radial direction and supports the pressing member in a cantilever manner.

5. 5. The raw tire building apparatus according to claim 4, wherein the pressing member and the arm member are divided into two, upper and lower, by a plane including the drum shaft, and a sum of the forces of the contact members provided on the upper pressing member is equal to a sum of the forces of the contact members provided on the lower pressing member.

6. 6. The green tire building apparatus according to claim 5, wherein the contact members are arranged symmetrically with respect to the drum axis.

7. The green tire building apparatus according to claim 6, wherein the contact members are disposed immediately above and immediately below the drum shaft.

8. 8. The green tire building apparatus according to claim 1, wherein the pressing member has a closed cross-sectional shape and extends in the circumferential direction.

9. 9. The green tire building apparatus according to claim 8, wherein the closed cross-sectional shape is a trapezoid in which the inner diameter of the drum at its axially inner end is larger than the inner diameter of the drum at its axially outer end.

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