A supply system for supplying a tire material to a forming drum body and a manufacturing method of a tubular tire member

Abstract

Provided is a compact feeding system capable of rapidly feeding each tire material to be attached to a forming drum body in a forward rotation or a reverse rotation while suppressing unnecessary deviation, and reducing time loss due to replenishment of the tire material, and a manufacturing method of a tubular tire member. Each tire material (M1, M2) discharged from the feeding units (1A, 1A) on the front and rear sides in the parallel direction to the upstream conveyors (2, 2) of the upper and lower stages is transferred to the upstream conveyors (2), the slide conveyors (3), and the downstream conveyors (4) of the upper stage which are inclined upward and the upstream conveyors (2), the slide conveyors (3), and the downstream conveyors ( 4 ) of the lower stage which are inclined downward, and is sequentially fed to the forming drum body (6) in a state after being cut to a predetermined length, the slide conveyors (3) of the upper and lower stages are slid and moved, and the tire materials (M1, M2) discharged from the feeding units (1B, 1B) on the front and rear sides on the other side in the parallel direction and cut to a predetermined length are sequentially fed to the forming drum body (6) in the same manner.

Description

Technical Field

[0001] This invention relates to a supply system for supplying tire material to a forming drum and a method for manufacturing a cylindrical tire component. More specifically, it relates to a compact tire material supply system and a method for manufacturing a cylindrical tire component that rapidly supplies tire material to a forming drum in a forward and reverse rotational manner, thereby suppressing unnecessary offsets and wrinkles, and reducing time loss due to tire material replenishment. Background Technology

[0002] Tires are manufactured by vulcanizing green tires. Green tires are formed by layering multiple types of tire materials. For example, a green tire is formed by integrating the inner liner, carcass material, belt material, tread rubber, and a pair of bead components onto a forming drum.

[0003] The belt material is constructed by arranging multiple reinforcing cords that extend obliquely side by side. Generally, two belt materials are used in a single green mold, and the two belt materials are stacked in such a way that their reinforcing cords intersect each other. Conventionally, a method has been proposed in which one of the two belt materials is wound around a forward-rotating forming drum, and then the other is wound around a counter-rotating forming drum, thus stacking them to form a cylindrical belt layer (for example, see Patent Document 1). In the forming method proposed in Patent Document 1, a conveyor configured in two sections, a target conveyor, is used to supply the individual belt materials to the forming drum.

[0004] In this proposed forming method, multiple strips are spliced ​​together on upper and lower conveyors to form a belt material of a fixed length. Then, each belt material is conveyed forward by the upper and lower conveyors. Next, one type of belt material is wound around a forward-rotating forming drum using a target conveyor to form a cylindrical belt layer. Then, another type of belt material is wound around a counter-rotating forming drum using a target conveyor to form a cylindrical belt layer.

[0005] In this method of forming the belt layer, multiple strips are spliced ​​together on various conveyor belts to form a belt material of a fixed length. Therefore, forming the belt material requires a considerable amount of time. Furthermore, there is a risk of unnecessary shifts and wrinkles occurring when transferring the belt material from the conveyor belt to the target conveyor. If the conveying speed is slowed down to avoid such unnecessary shifts and wrinkles, the supply time of the belt material to the forming drum becomes longer, thus reducing productivity.

[0006] Furthermore, when the material reserve of the strip is depleted, the supply of the belt material is stopped until it is replenished. If an additional amount of belt material were designed to be loaded and stored on a conveyor to avoid stopping the supply of belt material, the equipment would become large-scale. Therefore, there is room for improvement in terms of rapidly supplying individual tire materials to a forming drum for forward and reverse rotational attachment, suppressing unnecessary offsets and wrinkles, reducing time losses due to tire material replenishment, and creating a compact device.

[0007] Existing technical documents

[0008] Patent documents

[0009] Patent Document 1: Japanese Patent Application Publication No. 2001-105509 Summary of the Invention

[0010] The problem that the invention aims to solve

[0011] The object of the present invention is to provide a compact tire material supply system capable of rapidly supplying individual tire materials to a forming drum for forward and reverse rotational attachment while suppressing unnecessary offsets and reducing time loss due to tire material replenishment, as well as a method for manufacturing a cylindrical tire component.

[0012] Methods for solving problems

[0013] To achieve the above objectives, the supply system for supplying tire material to a forming drum of the present invention comprises: each supply unit disposed in a storage position, and supplying each strip of tire material to the forming drum for forward rotation attachment and reverse rotation attachment; the forming drum, wherein the forming drum rotates forward and reverse.The upstream and downstream conveyors are arranged longitudinally between each of the supply units and the forming drum. The upstream and downstream conveyors are configured in two sections, upper and lower. Tire material discharged from the supply unit on one side of the longitudinal arrangement to the upper conveyor is transferred to the downstream conveyor after being cut to length. Similarly, tire material discharged from the supply unit on the other side of the longitudinal arrangement to the lower conveyor is transferred to the downstream conveyor after being cut to length. The tire material transferred to each of the downstream conveyors is then fed into the forming drum. The drums are sequentially supplied and wound to produce stacked cylindrical tire components. The supply system is characterized in that, at the storage position, supply units containing tire material to be rotated and applied in a forward direction and supply units containing tire material to be rotated and applied in a reverse direction are arranged longitudinally. The longitudinally arranged supply units are arranged side-by-side. An upstream conveyor is provided for each supply unit. Between each upstream conveyor and each downstream conveyor, there are upper and lower sliding conveyors that slide along the parallel direction of each supply unit. The upper upstream conveyor and the sliding conveyor are located in the upper section of the upper and lower sections. The conveying surface of the downstream conveyor is configured to be inclined upwards at a predetermined angle relative to the horizontal towards the forming drum when viewed from the side. The conveying surfaces of the upstream conveyor, the sliding conveyor, and the downstream conveyor in the lower section of the upper and lower sections are configured to be inclined downwards at a predetermined angle relative to the horizontal towards the forming drum when viewed from the side. For the forming drum and each downstream conveyor located at a predetermined position, tire materials discharged from the longitudinally arranged supply units on one side of the parallel direction to the upstream conveyors are transferred via the sliding conveyors to the downstream conveyors after being cut to length. The tire material is sequentially supplied to the forming drum via a side conveyor. When the tire material stored in each of the longitudinally arranged supply units on one side of the parallel direction becomes empty, the tire material released from the longitudinally arranged supply units on the other side of the parallel direction to the upstream side conveyor, after being cut to length, is transferred via the sliding conveyor to the downstream side conveyor and sequentially supplied to the forming drum. During the supply of tire material to the forming drum from the longitudinally arranged supply units on the other side of the parallel direction, the empty longitudinally arranged supply units on one side of the parallel direction can be replaced with new supply units containing the tire material.

[0014] The method for manufacturing a cylindrical tire component of the present invention is characterized in that a cylindrical tire component is manufactured by using the above-described supply system for supplying tire material to a forming drum, wherein each of the tire materials is formed into a cylindrical shape and stacked.

[0015] Invention Effects

[0016] According to the tire material supply system of the present invention, tire materials to be applied to a forming drum in a forward rotational and reverse rotational manner are sequentially supplied to the forming drum in a dimensionally cut state via an upstream conveyor, a sliding conveyor, and a downstream conveyor arranged in the upper section, which are also inclined upwards at a predetermined angle relative to the horizontal, and an upstream conveyor, a sliding conveyor, and a downstream conveyor arranged in the lower section, which are also inclined downwards at a predetermined angle relative to the horizontal. Therefore, the tire materials are supplied to the forming drum rapidly, which is advantageous in suppressing unnecessary offsets and wrinkles.

[0017] To supply the tire material to the forming drum from the various longitudinally arranged supply units on both sides, the upper and lower sliding conveyors can be moved as a single unit, thus requiring minimal space. This facilitates a compact supply system.

[0018] Furthermore, when the tire material in each of the longitudinally arranged supply units on either side of the parallel arrangement becomes empty, during the supply of tire material from the longitudinally arranged supply units on the other side, the longitudinally arranged supply units on one side are replaced with new supply units containing the tire material. Therefore, tire material can be continuously supplied to the forming drum from the longitudinally arranged supply units on either side of the parallel arrangement. This helps reduce time loss due to replenishing the tire material. Consequently, there is no need to load and store additional amounts of tire material in downstream conveyors, etc., to reduce time loss due to replenishment, thus minimizing the length of the downstream conveyors, sliding conveyors, and upstream conveyors. As a result, the supply system becomes more compact.

[0019] According to the method for manufacturing a cylindrical tire component of the present invention, by using the above-described supply system for supplying tire material to a forming drum, it is advantageous to manufacture a cylindrical tire component obtained by stacking the individual tire materials in a cylindrical shape with good space-saving and productivity. Attached Figure Description

[0020] Figure 1 This is an explanatory diagram illustrating a top view of an embodiment of a supply system for supplying tire material to a forming drum, with a portion cut off.

[0021] Figure 2 This is an example of a side view. Figure 1 A diagram illustrating the supply system.

[0022] Figure 3 This is an example from Figure 1 A diagram illustrating the state in which the longitudinally arranged supply units on one side of the conveyor release tire material and transfer the tire material, which has been cut to length, to the sliding conveyor.

[0023] Figure 4 This is an example of a side view. Figure 3 A diagram illustrating the supply system.

[0024] Figure 5 This is an example of Figure 3 This diagram illustrates the transfer of tire material from the sliding conveyor to the downstream conveyor.

[0025] Figure 6 This is an example of Figure 5 A diagram illustrating the state in which tire material is transferred to a downstream conveyor and fed to a forming drum to manufacture a cylindrical tire component.

[0026] Figure 7 This is an illustration from a top view showing the sliding conveyor moving in front of the supply units on the other side and releasing tire material from the longitudinally arranged supply units on the other side.

[0027] Figure 8 This is an example of Figure 7 This diagram illustrates the process of releasing individual tire materials, cutting them to length, and transferring them to a sliding conveyor.

[0028] Figure 9 This is an example of making Figure 8 A diagram illustrating the state of a sliding conveyor carrying tire material cut to length sliding between a supply unit on one side and a downstream conveyor.

[0029] Figure 10 This is an example of Figure 9 This diagram illustrates the transfer of tire material from the sliding conveyor to the downstream conveyor.

[0030] Figure 11 This is an example of Figure 10 A diagram illustrating the state in which tire material is transferred to a downstream conveyor and fed to a forming drum to manufacture a cylindrical tire component. Detailed Implementation

[0031] Hereinafter, based on the embodiments shown in the accompanying drawings, the supply system for supplying tire material to a forming drum and the manufacturing method of a cylindrical tire component of the present invention will be described.

[0032] use Figure 1 , Figure 2 The illustrated tire material supply system (hereinafter referred to as the supply system) supplies two uncured strips of tire material M1 and M2, cut to length, sequentially to the forming drum 6 to form a cylindrical shape. One tire material M1 is rotated and attached to the forming drum 6 in the forward direction, while the other tire material M2 is rotated and attached to the forming drum 6 in the reverse direction. This produces a cylindrical tire component M formed by stacking tire materials M1 and M2 in two layers. For example, as tire materials M1 and M2, two belt materials are sequentially supplied to the forming drum 6 to form a cylindrical shape, thereby creating a belt layer that is stacked in two layers as the cylindrical tire component M. This belt layer serves as a component of the green tire G, and the tire T is manufactured by curing the green tire G.

[0033] Figure 1 , Figure 2 The illustrated supply system includes a supply unit 1 located at storage position P1, a forming drum 6 that rotates in both forward and reverse directions, and an upstream conveyor 2 and a downstream conveyor 3 arranged longitudinally between the supply unit 1 and the forming drum 6. The supply system also includes a sliding conveyor 3 located between the upstream conveyor 2 and the downstream conveyor 4. Furthermore, a cutter 5 is provided at the boundary between the upstream conveyor 2 and the sliding conveyor 3. The upstream conveyor 2, downstream conveyor 4, and sliding conveyor 3 are conveying units such as belt conveyors and roller conveyors that transport tire materials M1 and M2 in a flat position. The upstream conveyor 2, downstream conveyor 4, and sliding conveyor 3 are arranged in two sections, one above the other. The X, Y, and Z arrows in the figure represent the width, front-back, and height directions of the supply system, respectively, and are mutually orthogonal. In the figure, the direction from the conveyor towards the forming drum 6 in the front-back direction (Y direction) is the forward direction.

[0034] In supply unit 1, supply units 1A and 1B are arranged vertically side by side. In the vertically arranged supply units 1A and 1B, tire materials M1 and M2 are stored in a wound state, respectively. In the vertically arranged supply units 1B and 1B, tire materials M1 and M2 are also stored in a wound state, respectively.

[0035] Each supply unit 1 has a winding core, and tire materials M1 and M2 are stored in a wound state with their winding core as the center. Tire materials M1 and M2 are wound together with the release liner with their winding core as the center. In this embodiment, tire materials M1 and M2 are wound and stored in a long-dimensional state, but with respect to tire materials M1 and M2, it is also possible to store multiple tire materials cut to a predetermined length with their winding core as the center.

[0036] Each supply unit 1 (1A, 1B, 1B) is equipped with an upstream conveyor 2. For example... Figure 2 As illustrated, the upstream conveyors 2 configured for the supply units 1A and 1B at the front are shorter and positioned in the lower section of the two-section assembly. The upstream conveyors 2 configured for the supply units 1A and 1B at the rear are longer and positioned in the upper section of the two-section assembly. The front ends of the upstream conveyors 2 configured in the upper section and the upstream conveyors 2 configured in the lower section are located at substantially the same position in the front-rear direction.

[0037] The rear ends of the downstream conveyors 4 in both the upper and lower sections are located at substantially the same position in the front-to-back direction. The front end of the downstream conveyor 4 in the upper section is located above the forming drum 6, and the front end of the downstream conveyor 4 in the lower section is located below the forming drum 6. Furthermore, the conveying surface of the downstream conveyor 4 in the upper section is on the lower side, unlike the other conveyors (whose conveying surface is on the upper side). A magnet is arranged on the back side of the conveyor belt of the downstream conveyor 4 in the upper section. The metal wires constituting the tire materials M1 and M2 are attracted by the magnetic force of the magnet, thereby holding the tire materials M1 and M2 on the conveying surface of the downstream conveyor 4 in the upper section and conveying them.

[0038] The upper and lower sliding conveyors 3 and 3 move together in parallel directions between the upstream conveyors 2 and 2 and the downstream conveyors 4 and 4 of each supply unit 1A and 1B. The rear ends of the upper and lower sliding conveyors 3 and 3 are located at substantially the same position in the front-to-back direction, and their front ends are located at substantially the same position in the front-to-back direction.

[0039] Furthermore, in this embodiment, when supplying tire materials M1 and M2, the forming drum 6 and each downstream conveyor 4, which are set at a predetermined certain position, are arranged in a straight line (in a straight line) with each supply unit 1A, 1A arranged in parallel on one side and its upstream conveyors 2, 2.

[0040] like Figure 2As illustrated, the conveying surfaces of the upstream conveyor 2, sliding conveyor 3, and downstream conveyor 4 in the upper section are configured such that, when viewed from the side, they are inclined upwards towards the forming drum 6 relative to the horizontal at a predetermined angle S1 (positive angle). Similarly, the conveying surfaces of the upstream conveyor 2, sliding conveyor 3, and downstream conveyor 4 in the lower section are configured such that, when viewed from the side, they are inclined downwards towards the forming drum 6 relative to the horizontal at a predetermined angle S2 (negative angle). The inclination angle S1 is, for example, 3° to 20°, and the inclination angle S2 is, for example, -3° to -20°.

[0041] The longitudinal clearance between the upstream conveyor 2 and the sliding conveyor 3, which are adjacent in the longitudinal direction, is set to be as small as possible. Similarly, the longitudinal clearance between the downstream sliding conveyor 3 and the downstream conveyor 4, which are adjacent in the longitudinal direction, is also set to be as small as possible.

[0042] The cutter 5 cuts the tire materials M1 and M2 at an angle relative to the width direction, cutting them to a predetermined length. In this embodiment, there are two cutters 5 that slide together with the upper sliding conveyor 3 and the lower sliding conveyor 3. Each cutter 5 is capable of cutting the tire materials M1 and M2 at a desired angle relative to the width direction.

[0043] The forming drum body 6 rotates forward and backward around the drum axis C. The drum axis C extends along the X direction (parallel to the X direction).

[0044] Next, an example of the steps for manufacturing a cylindrical tire component M using this supply system will be described.

[0045] In this supply system, cylindrical tire components M are continuously manufactured. Sometimes, the system switches to manufacture tire components M of different specifications midway through the process. When multiple tire components M are continuously manufactured without changing their specifications, at storage location P1, the necessary amount of tire materials M1 and M2 for that specification are stored in each of the parallel supply units 1A, 1A, 1B, 1B.

[0046] In the case of manufacturing tire component M with a change in specifications midway, at storage location P1, the necessary amount of tire materials M1 and M2 corresponding to the specifications of the tire component M to be manufactured are stored in the supply units 1A, each of the supply units 1A of 1A arranged longitudinally on one side, and the supply units 1B, each of the supply units 1B of 1B arranged longitudinally on the other side.

[0047] like Figure 3 , Figure 4As illustrated, tire material M2 is discharged from the rear supply unit 1A, which is arranged longitudinally on one side parallel to the storage position P1, to the upstream conveyor 2 located in the upper section. Additionally, tire material M1 is discharged from the front supply unit 1A to the upstream conveyor 2 located in the lower section.

[0048] Figure 3 , Figure 4 The tire material M2 shown in the example is... Figure 5 As illustrated, they are sequentially transferred to the sliding conveyor 3 located in the upper section and the downstream conveyor 4. Additionally, Figure 3 , Figure 4 The tire material M1, as illustrated, is similarly transferred sequentially to the sliding conveyor 3 located in the lower section and the downstream conveyor 4. Furthermore, between the upstream conveyor 2 and the sliding conveyor 3, the tire materials M1 and M2 are cut to length by the cutter 5. Therefore, the tire materials M1 and M2, after being cut to length, are sequentially transferred to the sliding conveyor 3 and the downstream conveyor 4.

[0049] like Figure 6 As illustrated, tire materials M1 and M2, transferred to each downstream conveyor 4, are sequentially supplied to and wound onto the forming drum 6. In this way, each tire material M1 and M2 is supplied to each downstream conveyor 4 and the forming drum 6, which are located at predetermined positions, via upper and lower sliding conveyors 3.

[0050] While rotating the forming drum 6 forward about the drum axis C, tire material M2, transferred to the downstream conveyor 4 located in the upper section, is wound around the forming drum 6 to form a cylindrical shape. Next, while rotating the forming drum 6 in the reverse direction about the drum axis C, tire material M1, transferred to the downstream conveyor 4 located in the lower section, is wound around the forming drum 6 to form a cylindrical shape. Thus, a cylindrical tire component M is manufactured by stacking the individual tire materials M1 and M2 in cylindrical shapes.

[0051] When a predetermined number of tire components M are manufactured, the tire materials M1 and M2 stored in the longitudinally arranged supply units 1A, 1A on one side of the parallel direction at the storage position P1 become empty. In this case, the tire materials M1 and M2 can be supplied from the supply units 1B, 1B by sliding the upper and lower sections of the sliding conveyors 3, 3 together.

[0052] In detail, such as Figure 7As illustrated, the two sliding conveyors 3, one above the other, slide together from the front position of the supply units 1A, 1A on one side, which are arranged side by side at the storage position P1, to the front position of the supply units 1B, 1B on the other side. Furthermore, tire material M2 is discharged from the longitudinally arranged rear supply unit 1B to the upstream conveyor 2 located in the upper section. Additionally, tire material M1 is discharged from the front supply unit 1B to the upstream conveyor 2 located in the lower section.

[0053] Next, as Figure 8 As illustrated, the released tire material M2 is transferred to the upper sliding conveyor 3, and the released tire material M1 is transferred to the lower sliding conveyor 3. The tire materials M1 and M2 are cut to length by various cutters 5 between the upstream conveyor 2 and the sliding conveyor 3.

[0054] Next, as Figure 9 As illustrated, the sliding conveyors 3 and 3, which carry the upper and lower sections of tire materials M1 and M2 cut to length, slide from the front position of the supply units 1B and 1B on one side to the front position of the supply units 1A and 1A on the other side. That is, the sliding conveyors 3 and 3 of the upper and lower sections are arranged in parallel with the downstream conveyors 4 and 4 of the upper and lower sections and the forming drum 6, which are arranged at predetermined positions.

[0055] Next, as Figure 10 As illustrated, the tire materials M1 and M2 are transferred from sliding conveyors 3 to downstream conveyors 4. Then, as... Figure 11 As illustrated, a cylindrical tire component M is manufactured by sequentially feeding and stacking tire materials M1 and M2 into a forming drum 6.

[0056] During the process of supplying tire materials M1 and M2 from each supply unit 1B to the forming drum 6, the longitudinally arranged supply units 1A and 1A on the empty side are replaced with new supply units 1A and 1A containing tire materials M1 and M2.

[0057] In this supply system, tire materials M1 and M2, which are to be applied to a forming drum 6 in a forward and reverse rotational manner, are sequentially supplied to the forming drum 6 after being cut to length, via a conveying path implemented by an upstream conveyor 2, a sliding conveyor 3, and a downstream conveyor 4, which are inclined upwards at a predetermined angle S1, and a conveying path implemented by a lower upstream conveyor 2, a sliding conveyor 3, and a downstream conveyor 4, which are inclined downwards at a predetermined angle. Therefore, when each tire material M1 and M2 is transferred to its respective conveyor, it is difficult for unpredictable external forces to act on the tire materials M1 and M2, allowing for smooth transfer. Consequently, there is no need to excessively slow down the conveying speed of the tire materials M1 and M2. Therefore, it is advantageous to rapidly supply the tire materials M1 and M2 to the forming drum 6 while suppressing unnecessary offset and wrinkling of the tire materials M1 and M2.

[0058] To suppress unnecessary offsets and wrinkles on the individual tire materials M1 and M2, it is preferable to minimize the absolute values ​​of the respective tilt angles S1 and S2 (making each tilt nearly horizontal) and to minimize the difference in the absolute values ​​of the tilt angles S1 and S2 (making each tilt degree equal). However, if the absolute values ​​of the respective tilt angles S1 and S2 are reduced, the transport path will become longer; therefore, their absolute values ​​need to be, for example, 3° or more. The difference in the absolute values ​​of the respective tilt angles S1 and S2 is preferably 5° or less, and more preferably 3° or less.

[0059] In this supply system, to supply tire materials M1 and M2 from the longitudinally arranged supply units 1A, 1A on one side and the longitudinally arranged supply units 1B, 1B on the other side to the forming drum 6, it is only necessary to slide the upper and lower sliding conveyors 3, 3 together; there is no need to move the supply unit 1, thus requiring less space. Therefore, this facilitates a compact supply system.

[0060] Furthermore, if any one of the supply units 1A, 1A on one side and the supply units 1B, 1B on the other side becomes empty of tire material M1, M2, then during the supply of tire material M1, M2 from the other side to the forming drum 6, tire material M1, M2 from the other side can be replenished. Therefore, tire material M1, M2 can be continuously supplied to the forming drum 6 from the supply units 1A, 1A on one side and the supply units 1B, 1B on the other side. This helps to reduce the time loss caused by replenishing each tire material M1, M2.

[0061] Consequently, there is no need to load and store additional quantities of tire materials M1 and M2 on each downstream conveyor 4, etc., in order to reduce time losses caused by replenishing each tire material M1 and M2. Therefore, the lengths of each downstream conveyor 4, 4, each sliding conveyor 3, 3, and each upstream conveyor 2, 2 can be minimized. As a result, it is more conducive to making the supply system more compact.

[0062] By further shortening the sliding conveyor 3 and the downstream conveyor 4, it is beneficial to make the supply system more compact. The sliding conveyor 3 and the downstream conveyor 4 only need to be longer than the length of one sheet of tire materials M1 and M2 that are carried. Therefore, the length of the sliding conveyor 3 and the downstream conveyor 4 is, for example, set to be more than 100% and less than 150% of the length of one sheet of tire materials M1 and M2 carried on the conveyor, more preferably more than 105% and less than 130%, and even more preferably more than 105% and less than 120%. In addition, the upstream conveyor 2 does not need to be longer than the length of one sheet of tire materials M1 and M2 that are carried, so it only needs to be shortened as much as possible.

[0063] Therefore, by using this supply system, it is advantageous to manufacture a cylindrical tire component M by stacking individual tire materials M1 and M2 in a cylindrical shape, which is achieved in a space-saving and highly productive manner.

[0064] Tire materials M1 and M2 shrink unevenly over time due to being cut to length. However, at storage position P1, tire materials M1 and M2 are stored in a long-length state before being released from supply unit 1 and then cut to length. The cut tire materials M1 and M2 are then fed to forming drum 6 via sliding conveyor 3 and downstream conveyor 4. By cutting tire materials M1 and M2 to length just before manufacturing tire component M, compared to pre-cutting and storing them, the uneven shrinkage and shrinkage of tire materials M1 and M2 over time are minimized. As a result, the quality of tire T manufactured using tire component M is improved.

[0065] At storage location P1, the parallel supply units 1A and A1 on one side are designated as the main supply units. The sliding conveyors 3 and 3 are moved and fixedly positioned in front of the main supply units 1A and A1. This allows a supply path for the forming drum 6 to be formed via the main supply units 1A and A1, the upstream conveyors 2 and 2, the fixedly positioned sliding conveyors 3 and 3, and the downstream conveyors 4 and 4. In this formed supply path for tire materials M1 and M2, the sliding conveyors 3 and 3 do not need to move, thus enabling faster forming of tire components M and improving productivity. Furthermore, it also helps reduce the energy required to manufacture tire components M.

[0066] However, when supplying tire materials M1 and M2 from the parallel supply units 1B, 1B to the forming drum 6, the sliding conveyors 3, 3 need to slide whenever tire materials M1 and M2 are supplied from the supply units 1B, 1B to the downstream conveyors 4, 4 and the forming drum 6. This is detrimental to improving the productivity of tire components M and also hinders the reduction of energy required for manufacturing tire components M.

[0067] Therefore, at storage location P1, when tire materials M1 and M2 of the same specifications are stored in the parallel supply units 1A, 1A on one side and the supply units 1B, 1B on the other side, if the tire materials M1 and M2 stored in the main supply units 1A, 1A become empty, after the operation of replacing the empty main supply units 1A, 1A with new main supply units 1A, 1A storing the tire materials M1 and M2 is completed, the sliding conveyors 3, 3 are immediately moved and fixedly positioned in front of the new main supply units 1A, 1A. Furthermore, a supply path for the forming drum 6 can be formed through the new main supply units 1A, 1A, the upstream conveyors 2, 2, the fixedly positioned sliding conveyors 3, 3, and the downstream conveyors 4, 4, and tire materials M1 and M2 can be supplied from the new main supply units 1A, 1A.

[0068] In this way, by suppressing the frequency of sliding movement of the sliding conveyors 3, 3 to form the supply path for tire materials M1, M2, compared to the case where each tire material M1, M2 is continuously supplied to the forming drum 6 from the supply units 1B, 1B on the other side, it is more conducive to improving the productivity of tire component M and more conducive to reducing the energy required to manufacture tire component M. In order to make the main supply units 1A, 1A serve as the supply path for tire materials M1, M2 for a longer period of time than the supply units 1B, 1B on the other side, for example, the storage amount of tire materials M1, M2 at supply units 1A, 1A is greater than the storage amount at the supply units 1B, 1B on the other side.

[0069] The tire materials M1 and M2 used in this supply system are not limited to belt materials. Various tire materials M1 and M2 that can be applied to a forming drum 6 for forward and reverse rotational attachment can be used in this supply system. In addition, the forming drum 6 is not limited to various commonly known forming drums, for example, it can also be a so-called rigid core having an outer surface that is substantially the same as the inner surface of the tire T to be manufactured.

[0070] Explanation of reference numerals in the attached figures

[0071] 1 (1A, 1B) Tire material supply unit

[0072] 2. Upstream Conveyor

[0073] 3. Sliding conveyor

[0074] 4. Downstream conveyor

[0075] 5. Cutter

[0076] 6. Formed drum body

[0077] M-shaped tubular tire component

[0078] M1 and M2 tire materials

Claims

1. A supply system for supplying tire material to a forming drum, the supply system comprising: each supply unit disposed in a storage position, supplying strips of tire material to the forming drum for forward and reverse rotational attachment; the forming drum, which rotates forward and reverse; and an upstream conveyor and a downstream conveyor, the upstream and downstream conveyors being longitudinally arranged between each supply unit and the forming drum, the upstream and downstream conveyors being configured in two vertical sections. Tire material discharged from the longitudinally arranged supply unit to the upstream conveyor located in the upper section is transferred to the downstream conveyor after being cut to length. Similarly, tire material discharged from the longitudinally arranged supply unit to the upstream conveyor located in the lower section is transferred to the downstream conveyor after being cut to length. A stacked cylindrical tire component is manufactured by sequentially feeding and winding the tire materials transferred to the respective downstream conveyors into the forming drum, wherein... The supply system is configured as follows: At the storage location, supply units containing tire material to be rotated and applied in the forward direction and supply units containing tire material to be rotated and applied in the reverse direction are arranged longitudinally, and the longitudinally arranged supply units are arranged side by side, with an upstream conveyor configured for each supply unit. Between each of the upstream conveyors and each of the downstream conveyors, there is a sliding conveyor with upper and lower sections that slide along the parallel direction of each of the supply units. The conveying surfaces of the upstream conveyor, the sliding conveyor, and the downstream conveyor in the upper section are configured such that, when viewed from the side, they are inclined upwards at a predetermined angle relative to the horizontal towards the forming drum. Similarly, the conveying surfaces of the upstream conveyor, the sliding conveyor, and the downstream conveyor in the lower section are configured such that, when viewed from the side, they are inclined downwards at a predetermined angle relative to the horizontal towards the forming drum. For the forming drum and each of the downstream conveyors located at a predetermined position, the tire materials discharged from the longitudinally arranged supply units on one side of the parallel direction to the upstream conveyors are transferred to the downstream conveyors via the sliding conveyors after being cut to length and are sequentially supplied to the forming drum. When the tire materials stored in the longitudinally arranged supply units on one side of the parallel direction become empty, the tire materials released from the longitudinally arranged supply units on the other side of the parallel direction to the upstream conveyors are transferred to the downstream conveyors via the sliding conveyors after being cut to length and are sequentially supplied to the forming drum. During the supply of the tire materials from the longitudinally arranged supply units on the other side of the parallel direction to the forming drum, the empty longitudinally arranged supply units on one side of the parallel direction can be replaced with new supply units containing the tire materials.

2. The supply system for supplying tire material to a forming drum according to claim 1, wherein, The forming drum and each of the downstream conveyors, which are located at the predetermined position, are arranged in a straight line with each of the supply units arranged longitudinally on one side of the parallel direction and each of the upstream conveyors provided for each of the supply units.

3. The supply system for supplying tire material to the forming drum according to claim 2, wherein, When the tire material stored in each of the longitudinally arranged supply units on one side of the parallel direction becomes empty, after the operation of replacing the empty longitudinally arranged supply units on one side of the parallel direction with new supply units storing the tire material is completed, the tire material is immediately supplied from the new longitudinally arranged supply units to the forming drum.

4. A method for manufacturing a cylindrical tire component, wherein, Using the supply system for supplying tire material to a forming drum as described in any one of claims 1 to 3, a cylindrical tire component is manufactured by stacking the various tire materials in a cylindrical shape.

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