Pressing device for tire components

Abstract

To provide a pressurizing device for a tire constituent member which is easy to maintain.SOLUTION: A pressurizing device 20 for a tire constituent member includes: an axial member 30; a cylinder 52 which is formed in a cylindrical shape and arranged to surround the axial member 30, and arranged so that a cylinder axis direction is parallel to an axial direction of the axial member 30; a cylindrical pressure roll 54 arranged along the outer periphery of the cylinder 52 and connected to the cylinder 52 so as to be relatively movable in a circumferential direction; an insertion hole H formed along a direction perpendicular to the axial direction of the axial member 30 and opened on a side of the axial member, in the axial member 30; and a shaft 60 that moves with one end inserted into the insertion hole H and the other end fitted in the cylinder 52 to move the cylinder 52.SELECTED DRAWING: Figure 10

Description

Technical Field

[0001] The present invention relates to a pressing device for tire components.

Background Art

[0002] The following Patent Document 1 shows a pressing device that presses a tire component with a plurality of pressing rolls.

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the pressing device of Patent Document 1 above, the pressing roll is displaced around the shaft member to press the tire component. A pressing hole is formed in the shaft member, and a moving member protruding from this pressing hole presses the pressing roll, causing the pressing roll to displace.

[0005] Here, the tip of the moving member is fixed to a support portion connected to the inner circumference of the pressing roll outside the shaft member. When maintaining this pressing device, it may be necessary to remove the pressing roll and the support portion from the shaft member. In this case, it is necessary to release the fixation between the moving member and the support portion.

[0006] In consideration of the above facts, an object of the present invention is to provide a pressing device for tire components that is easy to maintain.

Means for Solving the Problems

[0007] The pressurizing device for the tire component of the first aspect includes a shaft member, a cylinder formed in a cylindrical shape and arranged to surround the shaft member with its cylinder axis direction parallel to the axial direction of the shaft member, a cylindrical pressurizing roll arranged along the outer circumference of the cylinder and connected to be relatively movable in the circumferential direction with respect to the cylinder, an insertion hole formed in the shaft member along a direction orthogonal to the axial direction of the shaft member and opening on the side surface of the shaft member, and a shaft having one end inserted into the insertion hole and the other end moving in a state of being fitted to the cylinder to move the cylinder.

[0008] In the pressurizing device for the tire component of the first aspect, the shaft inserted into the insertion hole of the shaft member moves in a state of being fitted to the cylinder to move the cylinder. A pressurizing roll is arranged on the outer circumference of the cylinder. Therefore, the pressurizing roll is also moved in synchronization with the cylinder. Thereby, the pressurizing roll can pressurize, for example, a tire forming drum.

[0009] Here, one end of the shaft is inserted into the insertion hole of the shaft member while the other end is fitted to the cylinder. Therefore, if the fitting between the shaft and the cylinder is released, the shaft member, the cylinder, and the pressurizing roll can be separated. Thereby, compared with the case where the shaft and the cylinder are fixed, the pressurizing device is easier to maintain.

[0010] The pressurizing device for the tire component of the second aspect includes a supply device for supplying air to the insertion hole, and the shaft slides inside the insertion hole by the pressure of the air supplied to the space between the bottom of the insertion hole and one end of the shaft in the insertion hole, and the protruding length from the shaft member changes.

[0011] In the pressurizing device for the tire component of the second aspect, the shaft slides inside the insertion hole due to the pressure of the air in the insertion hole, and the protruding length from the shaft member changes. That is, if the air in the insertion hole is pressurized, the length of the shaft protruding from the shaft member increases and presses the cylinder. Also, if the air in the insertion hole is depressurized, the length of the shaft protruding from the shaft member decreases and the pressing force on the cylinder is released, and the fitting between the shaft and the cylinder can be released.

[0012] In the pressurizing device for the tire component of the third aspect, a plurality of the cylinders are arranged along the axial direction of the shaft member, the pressurizing roll, the insertion hole, and the shaft are provided respectively for each of the cylinders, and the supply device is capable of adjusting the pressure of the air supplied for each of the cylinders.

[0013] In the pressurizing device for the tire component of the third aspect, a plurality of cylinders are arranged along the cylinder axial direction. Also, for each of the cylinders, the pressure of the air for changing the protruding length from the shaft member is adjustable.

[0014] Thereby, along the axial direction of the forming drum of the tire, the shapes of the cylinder and the pressurizing roll can be freely set. For this reason, it is possible to form a tire that is curved along the axial direction or a tire having irregularities.

[0015] The pressurizing device for the tire component of the fourth aspect includes a first insertion hole that opens on one side surface of the shaft member and a second insertion hole that opens on the side surface opposite to the one side, and the shaft is inserted into each of the first insertion hole and the second insertion hole and is respectively fitted with the cylinder.

[0016] In the pressurizing device for the tire component of the fourth aspect, the shaft is inserted into each of the first insertion hole and the second insertion hole that open in two directions, and each is fitted with the cylinder. For this reason, if the air in the first insertion hole is pressurized, the cylinder moves to one side. On the other hand, if the air in the second insertion hole is pressurized, the cylinder moves to the side opposite to the one side.

Advantages of the Invention

[0017] The pressurizing device for the tire component of the present invention is easy to maintain.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Embodiments for Carrying Out the Invention

[0019] Hereinafter, a pressure device for a tire component according to an embodiment of the present invention will be described with reference to the drawings. Components denoted by the same reference numerals in each drawing mean the same components. However, unless otherwise specified in the specification, each component is not limited to one, and a plurality of them may exist.

[0020] In addition, descriptions of overlapping configurations and reference numerals in each drawing may be omitted. Note that the present invention is not limited to the following embodiments, and appropriate changes such as omitting configurations or replacing them with different configurations can be made and implemented within the scope of the object of the present invention.

[0021] In each figure, the directions indicated by the arrows X and Y are, as an example, directions along the in-plane direction of the tire component N supplied from the supply device 12 described later, and are orthogonal to each other. Among these, the X direction is the supply direction of the tire component N. Also, the direction indicated by the arrow Z is a direction orthogonal to the X direction and the Y direction. The directions indicated by the arrows X, Y, and Z in each figure are assumed to coincide with each other. In the following description, for convenience, the X and Y directions may be referred to as the lateral directions, and the Z direction may be referred to as the vertical direction, etc.

[0022] <Tire molding device> FIG. 1 shows a schematic configuration of a tire molding device 10 in which a pressure device 20 for a tire component according to an embodiment of the present invention (hereinafter referred to as "pressure device 20") is used, in a side view.

[0023] The tire molding device 10 includes a supply device 12, a molding drum 14, a pressure device 20, and a control device (not shown). The tire molding device 10 is controlled by the control device to execute a tire molding operation, and the pressure device 20 pressurizes the tire component N from the outer peripheral side of the molding drum 14.

[0024] The supply device 12 has a transport device 12A for transporting the tire component N, and supplies the tire component N to the molding drum 14 in accordance with the rotation of the molding drum 14.

[0025] The forming drum 14 is a cylindrical drum for forming the tire component N, and is rotated at a predetermined speed about a rotation axis (an axis along the Y direction) by a rotating device (not shown) equipped with a motor or the like.

[0026] The tire component N is a member such as a tread that is wound around the outer periphery of the forming drum 14 and formed into a cylindrical shape. The pressing device 20 presses the tire component N toward the forming drum 14 during the placement of the tire component N on the forming drum 14 or after the placement of the tire component N on the forming drum 14.

[0027] <Pressing device> The pressing device 20 is formed by including a shaft member 30, a flow path member 40, a pressing member 50, a shaft 60 (see FIG. 4) described later, a holding member 22, and a moving device 24.

[0028] As shown in FIG. 2(A), both axial ends of the shaft member 30 are respectively held by the holding members 22. As shown in FIG. 1, the pair of holding members 22 connect the shaft member 30 to the moving device 24.

[0029] The moving device 24 is, for example, an arbitrarily positionable servo motor and a ball screw mechanism, and moves the shaft member 30 together with the pressing member 50 in the radial direction of the forming drum 14. By the moving device 24, the shaft member 30 approaches or separates from the forming drum 14.

[0030] Further, by the moving device 24, the pressing member 50 together with the shaft member 30 also moves between a position in contact with the tire component N and a position separated from the tire component N. The pressing member 50 is an annular member that rotates in contact with the tire component N and presses the tire component N in a predetermined pressing direction P.

[0031] When the tire component N is pressurized, the shaft member 30 is arranged along the tire component N at the pressurizing position, and the pressurizing member 50 is arranged along the outer peripheral surface of the tire component N. Specifically, the shaft member 30 is arranged outside the forming drum 14 in parallel with the axial direction (Y direction) of the forming drum 14. And the pressurizing member 50 pressurizes the whole or a part of the tire component N in the width direction (Y direction).

[0032] <Pressurizing mechanism> The pressurizing mechanism is a mechanism that moves the pressurizing member 50 relative to the shaft member 30 to pressurize the tire component N. The pressurizing mechanism is formed by including the shaft member 30, the flow path member 40, the pressurizing member 50, and a shaft 60 (see FIG. 4) described later in the pressurizing device 20.

[0033] As shown in FIGS. 2(A) and (B), the shaft member 30 and the flow path member 40 are inserted inside the pressurizing member 50. As shown in FIG. 3, the pressurizing member 50 includes an annular cylinder 52 and an annular pressurizing roll 54 connected to the cylinder 52. In addition, the illustration of the holding member 22 is omitted in FIG. 2(B).

[0034] As shown in FIG. 2, the pressurizing member 50 is formed in a cylindrical shape by a plurality (as an example, 33 in this embodiment) of "assemblies of the cylinder 52 and the pressurizing roll 54", surrounds the shaft member 30, and is arranged such that the cylinder axis direction is parallel to the axial direction of the shaft member 30.

[0035] Note that the "cylinder formed in a cylindrical shape" in the present invention refers to both a single annular cylinder 52 and an aggregate of a plurality of cylinders 52 arranged in the axial direction of the shaft member 30.

[0036] Similarly, the "cylindrical pressurizing roll" in the present invention refers to both a single annular pressurizing roll 54 and an aggregate of a plurality of pressurizing rolls 54 arranged in parallel in the axial direction of the shaft member 30.

[0037] (Cylinder, Pressurizing roll) As shown in Fig. 3, each cylinder 52 is formed with a main body member 52A and an outer peripheral member 52B. The main body member 52A is a hollow annular member, and guide portions 52C are formed at two locations inside the ring. The two guide portions 52C are formed at positions that are point-symmetrical with respect to the center point of the ring, and are formed parallel to each other (along the Z axis in Fig. 3).

[0038] As shown in Figs. 5 and 6, the guide portion 52C is a portion that fits into a guide groove 32 formed in a shaft member 30 described later. Although details will be described later, the cylinder 52 moves relative to the shaft member 30 when the guide portion 52C moves along the guide groove 32.

[0039] Also, two fitting holes 52D into which the tip of a shaft 60 is fitted are formed in the main body member 52A of the cylinder 52.

[0040] The outer peripheral member 52B of the cylinder 52 is an annular member attached to the outer periphery of the main body member 52A, and is a member facing the inner peripheral surface of the pressure roll 54. A ball bearing B is disposed between the outer peripheral member 52B and the pressure roll 54. Thereby, the pressure roll 54 is connected to the cylinder 52 so as to be relatively movable in the circumferential direction.

[0041] (Shaft member, shaft) As shown in Fig. 2, the shaft member 30 is a square bar-shaped member disposed inside a cylindrical pressure member 50.

[0042] As shown in Figs. 4(A) and (B), insertion holes H0, HR1, HR2, HR3 to HR16, HL1, HL2, and HL3 to HL16 that penetrate from the upper surface to the lower surface are formed in the shaft member 30 along a direction orthogonal to the axial direction of the shaft member 30.

[0043] Note that the end faces in the Z direction in the state where the pressure device 20 is attached to the tire molding device 10 are referred to as the "upper surface" and the "lower surface" for convenience. Also, the "side surface" in the "insertion hole opened on the side surface of the shaft member" of the present invention refers to this "upper surface" and "lower surface".

[0044] The insertion hole H0 is a through hole provided in the central portion in the axial direction (Y direction) of the shaft member 30, and is provided at two locations in the width direction (X direction).

[0045] The insertion holes HR1, HR2, HR3 to HR16 are through holes formed side by side on one side in the axial direction of each of the two insertion holes H0. Similarly, the insertion holes HL1, HL2, HL3 to HL16 are through holes formed side by side on the other side in the axial direction of each of the two insertion holes H0.

[0046] The pair of insertion holes H0 provided at two locations in the width direction (X direction) are respectively the "first insertion hole" and the "second insertion hole" in the present invention. The same applies to the pair of insertion holes HR1, HR2, HR3 to HR16, HL1, HL2 and HL3 to HL16.

[0047] In addition, in FIG. 4(A), for the sake of simplifying the illustration, the insertion holes HR2 to HR16 and HL2 to HL16 above the paper surface are omitted.

[0048] These insertion holes H0, HR1, HR2, HR3 to HR16, HL1, HL2 and HL3 to HL16 are respectively communicated with the side surface (end surface in the X direction) of the shaft member 30 by the ventilation holes E.

[0049] In the following description, these insertion holes H0, HR1, HR2, HR3 to HR16, HL1, HL2 and HL3 to HL16 may be collectively referred to as the insertion hole H. Two insertion holes H (that is, a pair of insertion holes H0, a pair of insertion holes HR1, etc.) are provided for each cylinder 52.

[0050] Further, a guide groove 32 is formed on the side surface of the shaft member 30. The guide groove 32 opens to the upper surface of the shaft member 30 (guide groove 32A) on one side surface, and opens to the lower surface of the shaft member 30 (guide groove 32B) on the other side surface. The guide grooves 32A and 32B are provided for each cylinder 52 respectively.

[0051] As shown in FIGS. 5(A) and 5(B), among the pair of insertion holes H arranged in the width direction of the shaft member 30, the lower end of one of the insertion holes H (the left side in FIGS. 5(A) and 5(B)) is sealed by the sealing member 62, and the upper end opens to the upper surface of the shaft member 30. Further, the upper end of the other insertion hole H (the right side in FIGS. 5(A) and 5(B)) is sealed by the sealing member 62, and the lower end opens to the lower surface of the shaft member 30.

[0052] A shaft 60 is inserted into each insertion hole H. The shaft 60 inserted into one of the insertion holes H can move in the vertical direction with its upper end protruding from the insertion hole H. Similarly, the shaft 60 inserted into the other insertion hole H can move in the vertical direction with its lower end protruding from the insertion hole H.

[0053] The pressing mechanism of the pressing device 20 is provided with a supply device (not shown) for supplying air to the insertion hole H. The air supplied from the supply device passes from the inside of the flow path member 40 through the ventilation hole E and is supplied to the internal space V between the bottom of the insertion hole H (the bottom formed by the sealing member 62) and the end of the shaft 60, as indicated by the arrow in FIG. 5(B). Note that the supply device may be provided with a mechanism for sucking air from the internal space V.

[0054] With the pressing roll 54 in contact with the tire component N, the shaft 60 slides inside the insertion hole H due to the pressure of the air supplied (or sucked) from the supply device, and the protruding length from the shaft member 30 changes. Thereby, the shaft 60 expands and contracts outside the shaft member 30.

[0055] A sealing member formed of an elastic member such as rubber for sealing the gap between the outer peripheral surface of the shaft 60 and the insertion hole H is attached thereto. Thereby, the internal space V is formed airtight except for the ventilation hole E.

[0056] (Flow path member) The flow path member 40 is a rod-shaped member provided on both sides in the width direction of the shaft member 30. The flow path member is arranged along the axial direction of the shaft member 30 and is fixed to the shaft member 30. Each flow path member 40 is formed by combining plate-shaped flow path members 42, 44, 46, and 48.

[0057] In FIGS. 6, 7, 8, and 9, the flow path members 42, 44, 46, and 48 are respectively shown. In FIGS. 6(B), 7(B), 8(B), and 9(B), the positions indicated by the reference lines 0, R1, R2, R3 to R16, L1, L2, and L3 to L16 are respectively the center lines of the insertion holes H0, HR1, HR2, HR3 to HR16, HL1, HL2, and HL3 to HL16 of the shaft member 30 shown in FIG. 4(B) when the flow path member 40 is attached to the shaft member 30.

[0058] Note that the positions indicated by the reference lines R1, R2, and R3 to R16 are respectively positions that are line-symmetric with the positions indicated by the reference lines L1, L2, and L3 to L16 with respect to the position indicated by the reference line 0.

[0059] As shown in FIGS. 6(A) and 6(B), a plurality (8 on each side in this embodiment) of supply ports S (supply ports S1 to S16) through which air is supplied from the supply device are provided at both ends of the flow path member 42.

[0060] Each supply port S is formed to penetrate from the front surface to the back surface of the flow path member 42 along the width direction (X direction) of the flow path member 42. Note that when the flow path member 40 is fixed to the shaft member 30, the surface on the side opposite to the shaft member 30 is referred to as the "front surface", and the surface on the shaft member 30 side is referred to as the "back surface".

[0061] On the back surface of the flow path member 42, a plurality of flow paths M (flow paths M12, M14, and M15) are formed. The flow path M12 is a flow path for causing the air supplied from the supply port S12 to flow to the positions indicated by the reference lines L12 and R12. Similarly, the flow path M14 is a flow path for causing the air supplied from the supply port S14 to flow to the positions indicated by the reference lines L14 and R14. Further, the flow path M15 is a flow path for causing the air supplied from the supply port S15 to flow to the positions indicated by the reference lines L15 and R15.

[0062] Here, as shown in FIGS. 7(B), 8(B), and 9(B), in the flow path members 44, 46, and 48, through holes K are formed at the positions indicated by the reference lines L12, L14, L15, R12, R14, and R15. These through holes communicate with each other and further communicate with the ventilation holes E in the shaft member 30 shown in FIG. 4(B).

[0063] Thereby, the air that has flowed through the flow path M12 in the flow path member 42 is supplied to the insertion holes HL12 and HR12 in the shaft member 30, the air that has flowed through the flow path M14 is supplied to the insertion holes HL14 and HR14, and the air that has flowed through the flow path M15 is supplied to the insertion holes HL15 and HR15.

[0064] Also, on the back surface of the flow path member 44 shown in FIGS. 7(A) and 7(B), a plurality of flow paths M (flow paths M6, M7, M11, and M16) are formed. The flow path M6 is a flow path for causing the air supplied from the supply port S6 of the flow path member 42 to flow to the positions indicated by the reference lines L6 and R6. Similarly, the flow path M7 is a flow path for causing the air supplied from the supply port S7 to flow to the positions indicated by the reference lines L7 and R7. Further, the flow path M11 is a flow path for causing the air supplied from the supply port S11 to flow to the positions indicated by the reference lines L11 and R11. Furthermore, the flow path M16 is a flow path for causing the air supplied from the supply port S16 to flow to the positions indicated by the reference lines L16 and R16.

[0065] Similarly, on the back surface of the flow path member 46 shown in FIGS. 8(A) and 8(B), a plurality of flow paths M (flow paths M3, M4, M10, and M13) are formed. And on the back surface of the flow path member 48 shown in FIGS. 9(A) and 9(B), a plurality of flow paths M (flow paths M1, M2, M5, M8, and M9) are formed. Note that the air in the flow path M1 flows not only through the positions indicated by the reference lines L1 and R1 but also through the position indicated by the reference line 0.

[0066] The amount of air supplied to (or sucked in) these supply ports S1 to S16 can be adjusted individually. That is, the amount of air supplied to the insertion holes H0, HR1, HR2, and HR3 to HR16 shown in FIG. 4(A) can be adjusted individually. Note that the amount of air supplied to the insertion holes HL1, HL2, and HL3 to HL16 substantially coincides with the amount of air supplied to the insertion holes H0, HR1, HR2, and HR3 to HR16, respectively.

[0067] Also, as shown in FIGS. 5(A) and 5(B), since the flow path member 40 is provided on both sides of the shaft member 30, for example, the amount of air supplied to the two vertically arranged insertion holes HL1 shown in FIG. 4(A) can be adjusted individually. The same applies to the other two vertically arranged insertion holes H.

[0068] (Connection of Shaft Member, Flow Path Member, Cylinder, Pressing Roll, and Shaft) FIG. 10 shows a state in which the shaft member 30, the flow path member 40, the cylinder 52, the pressing roll 54, and the shaft 60 are assembled. More specifically, in the state shown in FIG. 10, the shaft member 30 with the flow path member 40 fixed is assembled with the connecting body of the cylinder 52 and the pressing roll 54 by the shaft 60.

[0069] As shown in this figure, in the state where the cylinder 52 is assembled to the shaft member 30, the two guide portions 52C are engaged with the guide grooves 32A and 32B formed in the shaft member 30, respectively.

[0070] Further, the shaft 60 inserted into the insertion hole H of the shaft member 30 protrudes from the shaft member 30. And the tip of the shaft 60 on the protruding side from the shaft member 30 is fitted into the fitting hole 52D of the main body member 52A of the cylinder 52.

[0071] Here, "fitting" means a state where the tip of the shaft 60 is fitted into the fitting hole 52D and is not fixed. For example, when the supply of air to the internal space V of the insertion hole H is stopped and the shaft 60 can slide freely, the fitting state between the shaft 60 and the fitting hole 52D is released by simply pulling out the tip of the shaft 60 from the fitting hole 52D.

[0072] With the tips of the two shafts 60 fitted into the fitting holes 52D, by adjusting the pressure of the air supplied to the internal spaces V of the two insertion holes H respectively, the shaft 60 moves, that is, slides inside the insertion hole H, the protruding length from the shaft member 30 changes, and it expands and contracts outside the shaft member 30. Thereby, the connecting body of the cylinder 52 and the pressure roll 54 moves relative to the shaft member 30.

[0073] For example, as shown in FIG. 11, if the pressure of the air supplied to the internal space V of one (left side) insertion hole H is made larger than the pressure of the air supplied to the internal space V of the other (right side) insertion hole H, the protruding length of the shaft 60 inserted into one (left side) insertion hole H becomes longer than the protruding length of the shaft 60 inserted into the other (right side) insertion hole H. At this time, if the pressure difference of the air is increased, the difference in the protruding length can be increased.

[0074] Also, for example, as shown in FIG. 12, by sucking air from the internal spaces V of both insertion holes H and shortening the protruding lengths of both shafts 60, the fitting state between the shaft 60 and the fitting hole 52D can be released. Thereby, the connecting body of the cylinder 52 and the pressure roll 54 can be removed from the shaft member 30.

[0075] In addition, during normal operation when the pressurizing device 20 is used, it is preferable to maintain the internal space V at a positive pressure to keep the shaft 60 in a state of being biased outward. This can prevent the connected body of the cylinder 52 and the pressurizing roll 54 from accidentally coming off the shaft member 30.

[0076] <Function and Effect> In the pressurizing device 20 according to this embodiment, as shown in FIGS. 10 and 11, the shaft 60 inserted into the insertion hole H of the shaft member 30 moves while being fitted to the cylinder 52 to move the cylinder 52. A pressurizing roll 54 is arranged on the outer periphery of the cylinder 52. Therefore, the pressurizing roll 54 is also moved in synchronization with the cylinder 52. Thereby, the pressurizing roll 54 can pressurize the forming drum 14 and the tire constituent member N shown in FIG. 1.

[0077] Here, as shown in FIG. 5, one end of the shaft 60 is inserted into the insertion hole H of the shaft member 30, while the other end is fitted into the fitting hole 52D of the cylinder 52. Therefore, if the fitting between the shaft 60 and the cylinder 52 is released, the shaft member 30, the cylinder 52, and the pressurizing roll 54 can be separated as shown in FIG. 12. That is, compared with the case where the shaft 60 and the cylinder 52 are fixed, the pressurizing device 20 is easier to maintain.

[0078] Further, in the pressurizing device 20, with the pressurizing roll 54 in contact with the tire constituent member N, the shaft 60 slides inside the insertion hole H due to the air pressure in the internal space V of the insertion hole H, and the protruding length from the shaft member 30 changes. That is, if the air in the internal space V is pressurized, the length of the shaft 60 protruding from the shaft member 30 increases and presses the cylinder 52. Also, if the air in the internal space V is depressurized, the length of the shaft 60 protruding from the shaft member 30 decreases. Further, if the depressurization continues to a negative pressure, the pressing force on the cylinder 52 is released, and the fitting between the shaft 60 and the cylinder 52 can be released.

[0079] In the pressurizing device 20, as shown in FIG. 2, a plurality of cylinders 52 are arranged along the cylinder axis direction. Further, for each of the cylinders 52, the air pressure for changing the protruding length from the shaft member 30 is adjustable.

[0080] Thereby, along the axial direction of the forming drum 14, the shapes of the cylinder 52 and the pressure roll 54 can be freely set. For this reason, it is possible to mold the tire constituent member N that is curved along the axial direction or the tire constituent member N that has irregularities.

[0081] In addition, in the present embodiment, the air supplied from the supply device to the insertion holes HL1, HL2, and HL3 to HL16 is respectively supplied through the same flow path M as the air supplied to the insertion holes H0, HR1, HR2, and HR3 to HR16.

[0082] Therefore, the amount of air supplied to the insertion holes HL1, HL2, and HL3 to HL16 is equal to the amount of air supplied to the insertion holes H0, HR1, HR2, and HR3 to HR16, respectively. Therefore, by using the pressurizing device 20, the tire constituent member N can be molded into a line-symmetric shape with the position indicated by the reference line 0 in FIG. 6(B) etc. as the center line.

[0083] The description "the pressure of the air to be supplied is adjustable for each cylinder" in the present invention includes an aspect of individually adjusting the pressure of the air to be supplied for each "one cylinder 52". However, it may be configured to adjust the pressure of the air to be supplied for each "plurality of cylinders 52" so that the pressures of the air supplied to the insertion holes HL1 and HR1 in the present embodiment are equal.

[0084] In the pressurizing device 20, the shaft 60 is inserted into each of two insertion holes H (first insertion hole) that open upward of the shaft member 30 and an insertion hole H (second insertion hole) that opens downward of the shaft member 30, and each is fitted with the fitting hole 52D of the cylinder 52.

[0085] Therefore, as shown in FIG. 11, if the air in the internal space V of the insertion hole H that opens upward in the shaft member 30 is pressurized, the cylinder moves upward. On the other hand, if the air in the internal space V of the insertion hole H that opens downward in the shaft member 30 is pressurized, the cylinder moves downward.

[0086] Thus, in the pressurizing device 20, since two shafts 60 are provided for each cylinder 52, the cylinder 52 can be held with respect to the shaft member 30 in a stable state and the amount of movement of the cylinder 52 can be easily adjusted as compared with, for example, the case of one shaft.

[0087] Further, the two shafts 60 extend in opposite directions, not in the same direction, and the tip of each shaft 60 is fitted into the fitting hole 52D of the cylinder 52. For this reason, by maintaining the air in the internal space V of the insertion hole H at a positive pressure, the cylinder 52 can be held with respect to the shaft member 30 by the biasing force of the shaft 60. That is, it is not necessary to fix the shaft 60 to the cylinder 52.

[0088] In the present embodiment, the number of shafts 60 is two, but the embodiment of the present invention is not limited to this. For example, the number of shafts 60 may be three or four. The plurality of shafts 60 may be arranged at equal intervals in the circumferential direction of the cylinder 52, or may be arranged in a biased manner.

[0089] The “biased arrangement” includes, for example, an arrangement in which two shafts 60 are configured to expand and contract above the shaft member 30 and one shaft 60 is configured to expand and contract below the shaft member 30.

[0090] Also, in the present embodiment, the tip of the shaft 60 is fitted into the fitting hole 52D of the cylinder 52, but the embodiment of the present invention is not limited to this. For example, a fitting hole may be formed at the tip of the shaft 60, a protrusion protruding radially inward may be formed on the cylinder 52, and these fitting hole and protrusion may be fitted together.

[0091] Also, in this embodiment, the case where the supply device includes a mechanism for sucking air from the internal space V has been described, but the air suction mechanism is not necessarily required. Even if the air is not mechanically sucked, if the shaft 60 is pushed into the insertion hole H with the air supply stopped, the fitting between the shaft 60 and the cylinder 52 can be released.

[0092] Also, in this embodiment, the pressing member 50 is formed by 33 "coupled bodies of the cylinder 52 and the pressing roll 54", but the number of these coupled bodies can be changed as appropriate. In this case, according to the quantity of the coupled bodies, the quantities of the supply port S and the flow path M in the flow path member are adjusted as appropriate.

Explanation of Reference Numerals

[0093] 20 Pressing device, 30 Shaft member, 52 Cylinder, 54 Pressing roll, 60 Shaft, H Insertion hole

Claims

1. A shaft member, a cylinder formed in a cylindrical shape and arranged to surround the shaft member, with the cylinder axis direction arranged parallel to the axis direction of the shaft member, a cylindrical pressure roll arranged along the outer periphery of the cylinder and connected to be relatively movable in the circumferential direction with respect to the cylinder, in the shaft member, an insertion hole formed along a direction orthogonal to the axis direction of the shaft member and opening to the side surface of the shaft member, a shaft that moves with one end inserted into the insertion hole and the other end fitted to the cylinder to move the cylinder, comprising, the shaft member is formed to be removable from the cylinder by releasing the fitting state of the shaft to the cylinder, a pressure device for a tire component.

2. Comprising a supply device for supplying air to the insertion hole, the shaft slides inside the insertion hole by the pressure of the air supplied to the space between the bottom of the insertion hole and one end of the shaft in the insertion hole, and the protruding length from the shaft member changes, the pressure device for a tire component according to claim 1.

3. A plurality of flow path members are provided on both sides in the width direction of the shaft member, the cylinders are formed by arranging a plurality of them along the axis direction of the shaft member, the pressure roll, the insertion hole and the shaft are respectively provided for each cylinder, the supply device supplies air to different insertion holes of the shaft member via the flow path members, and adjusts the pressure of the supplied air for each cylinder, the pressure device for a tire component according to claim 2.

4. The insertion hole includes a first insertion hole opening to the side surface on one side of the shaft member and a second insertion hole opening to the side surface on the side opposite to the one side, the shaft is inserted into each of the first insertion hole and the second insertion hole and respectively fitted to the cylinder, by shortening the protruding lengths of the shaft inserted into each of the first insertion hole and the second insertion hole, the fitting state of the shaft to the cylinder can be released, the pressure device for a tire component according to any one of claims 1 to 3.

5. Formed in the cylinder but engaged with a guide groove formed in the shaft member, and the guide portion moves along the guide groove, the pressure device according to claim 1.

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