System for supplying tire material to molding drum body and method for manufacturing cylindrical tire member

Abstract

To provide a compact supply system and a method for manufacturing a cylindrical tire member, capable of quickly supplying each tire material to be applied to a molding drum body in forward rotation and reverse rotation while suppressing unnecessary deviation, and reducing time loss caused by replenishing the tire material.SOLUTION: Tire materials M1, M2 fed from front and rear supply units 1A, 1A on one side of parallel direction to an upper and lower upstream conveyors 2, 2 are transferred to the upper upstream conveyor 2, slide conveyor 3, downstream conveyor 4 which are uniformly inclined upward, and the lower upstream conveyor 2, slide conveyor 3, downstream conveyor 4 which are uniformly inclined downward, and are sequentially supplied to a molding drum body 6 in a fixed-length cut state, and the upper and lower two-stage slide conveyor 3 is slid to move, and the tire materials M1, M2 fed from front and rear supply units 1B, 1B on the other side of the parallel direction and cut to the fixed-length are similarly sequentially supplied to the molding drum body 6.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a tire material supplying system to a forming drum body and a method for manufacturing cylindrical tire components, and more specifically to a compact tire material supplying system and method for manufacturing cylindrical tire components that can quickly supply tire materials to be applied to a single forming drum body in forward rotation and reverse rotation while suppressing the occurrence of unnecessary misalignment and wrinkles, and reduce time loss due to replenishment of tire material. [Background technology]

[0002] Tires are manufactured by vulcanizing green tires. Green tires are formed by laminating many different types of tire materials. For example, an inner liner, carcass material, belt material, tread rubber, a pair of bead members, etc. are integrated on a molding drum to form a green tire.

[0003] The belt material is composed of a large number of reinforcing cords extending diagonally arranged in parallel. Generally, two belt materials are used for one green tire, and the two belt materials are layered so that the reinforcing cords cross each other. A method has been proposed in the past in which one of two belt materials is wound around a forming drum rotated forward, and then the other is wound around a forming drum rotated backward, to layer and mold a cylindrical belt layer (see, for example, Patent Document 1). In the molding method proposed in Patent Document 1, each belt material is supplied to the forming drum using a transfer conveyor and a get conveyor arranged in two stages, one above the other.

[0004] In this proposed forming method, a number of strip pieces are spliced ​​together on the upper and lower conveyors to form a fixed length belt material. Then, each belt material is transported forward by the upper and lower conveyors. Next, one belt material is wound around a forward rotating forming drum using one get conveyor to form a tubular belt layer. Next, the other belt material is wound around a reverse rotating forming drum using the other get conveyor to form a tubular belt layer.

[0005] In this belt layer forming method, a large number of strip pieces are spliced ​​on each transport belt conveyor to form a fixed length belt material, so it takes a considerable amount of time to form the belt material. In addition, there is a risk that the belt material will be undesirably shifted or wrinkled when it is transferred from the transport conveyor to the get conveyor. If the conveying speed is slowed down to avoid such undesirable shifts or wrinkles, the time required to feed the belt material to the forming drum will be longer, reducing productivity.

[0006] Furthermore, when the stock of strip material runs out, the supply of belt material is stopped until the material is replenished. In order to avoid the stop of the supply of belt material, if an excess amount of belt material is placed on the transport conveyor to be stored, the equipment becomes large. Therefore, there is room for improvement in order to quickly supply tire materials to a single forming drum body while suppressing the occurrence of unnecessary misalignment and wrinkles, reduce time loss due to replenishing tire materials, and make the equipment compact. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2001-105509 A Summary of the Invention [Problem to be solved by the invention]

[0008] An object of the present invention is to provide a compact tire material supply system and a method for manufacturing cylindrical tire components that can quickly supply tire materials to be applied to a single molding drum body in both forward and reverse rotation while suppressing unnecessary misalignment, thereby reducing time loss due to replenishment of tire materials. [Means for solving the problem]

[0009] In order to achieve the above object, the present invention provides a tire material supply system to a forming drum body, the system comprising: respective supply units arranged at a stock position for supplying respective strip-shaped tire materials to be applied to the forming drum body in forward rotation and in reverse rotation; the forming drum body which rotates forward and reverse; and an upstream conveyor and a downstream conveyor which are vertically arranged between each of the supply units and the forming drum body, the upstream conveyor and the downstream conveyor being respectively arranged in two tiers, one above the other, such that the tire material fed from one of the vertically arranged supply units onto the upstream conveyor which is arranged in the upper tier is transferred to the downstream conveyor in a state in which it is cut to a fixed length, and the tire material fed from the other vertically arranged supply unit onto the upstream conveyor which is arranged in the lower tier is transferred to the downstream conveyor in a state in which it is cut to a fixed length, and each of the tire materials transferred to the respective downstream conveyors is sequentially supplied to the forming drum body and wound thereon to manufacture a stacked cylindrical tire component. the supply unit in which the tire material to be applied in forward rotation is wound and stored, and the supply unit in which the tire material to be applied in reverse rotation is wound and stored are arranged in a vertical line, and the vertically arranged supply units are arranged in parallel, the upstream conveyor is arranged for each of the supply units, and a slide conveyor is provided in two upper and lower stages which slide and move in the parallel direction of the respective supply units between each of the upstream conveyors and each of the downstream conveyors, the conveying surfaces of the upstream conveyor, the slide conveyor and the downstream conveyor which are arranged in the upper stage of the upper and lower two stages are set to be uniformly inclined upward at a predetermined inclination angle with respect to the horizontal toward the forming drum body in a side view, and the conveying surfaces of the upstream conveyor, the slide conveyor and the downstream conveyor which are arranged in the lower stage of the upper and lower two stages are set to be uniformly inclined downward at a predetermined inclination angle with respect to the horizontal toward the forming drum body in a side view, andThe tire materials fed from the respective supply units arranged vertically on one side of the parallel direction to the respective upstream conveyors are cut to a fixed length and transferred to the respective downstream conveyors via the respective slide conveyors to be sequentially supplied to the forming drum body, and when the tire materials stored in the respective supply units arranged vertically on one side of the parallel direction become empty, the tire materials fed from the respective supply units arranged vertically on the other side of the parallel direction to the respective upstream conveyors are cut to a fixed length and transferred to the respective downstream conveyors via the respective slide conveyors to be sequentially supplied to the forming drum body, and while the tire material is being supplied from the respective supply units arranged vertically on the other side of the parallel direction to the forming drum body, the empty supply units arranged vertically on one side of the parallel direction are replaced with new supply units in which the tire material is stocked.

[0010] The method for manufacturing a cylindrical tire component of the present invention is characterized in that, using the tire material supply system to the building drum body, each of the tire materials is formed into a cylindrical shape and stacked to produce a cylindrical tire component. Effect of the Invention

[0011] According to the tire material supply system for the forming drum of the present invention, the tire materials to be applied to one forming drum in forward rotation and reverse rotation are sequentially supplied to the forming drum in a fixed-length cut state via the upstream conveyor, the slide conveyor, and the downstream conveyor arranged in the upper stage, which is uniformly inclined upward at a predetermined inclination angle with respect to the horizontal in a side view toward the forming drum, and the upstream conveyor, the slide conveyor, and the downstream conveyor arranged in the lower stage, which is uniformly inclined downward at a predetermined inclination angle. Therefore, it is advantageous to quickly supply each tire material to the forming drum while suppressing the occurrence of unnecessary shifting and wrinkles.

[0012] In order to supply the tire materials from the respective supply units arranged in parallel on one side and the other side in vertical rows to the building drum body, the upper and lower two stages of the slide conveyors can be slid together, so that an excessively large space is not required, which is advantageous in making the supply system compact.

[0013] Then, when the tire material of each of the supply units arranged in a vertical line on either one side or the other side becomes empty, the one of the supply units arranged in a vertical line is replaced with a new supply unit in which the tire material is stocked while the tire material is being supplied from the other of the supply units arranged in a vertical line. Therefore, the tire material can be continuously supplied to the building drum body from each of the supply units arranged in a vertical line on either one side or the other side. This is advantageous in reducing the time loss caused by the refilling of the tire material. Accordingly, since it is not necessary to place and stock an excess amount of the tire material on each of the downstream conveyors, etc. in order to reduce the time loss caused by the refilling of the tire material, the length of each of the downstream conveyors, each of the slide conveyors, and each of the upstream conveyors can be minimized. As a result, it is even more advantageous in making the supply system more compact.

[0014] According to the manufacturing method of the cylindrical tire component of the present invention, by using the tire material supply system to the molding drum body, it is advantageous to manufacture cylindrical tire components in which each of the tire materials is stacked in a cylindrical shape in a space-saving manner and with good productivity. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1 is a partially cutaway plan view illustrating an embodiment of a system for supplying tire material to a building drum body. [Diagram 2]2 is an explanatory diagram illustrating the supply system of FIG. 1 in a side view. [Diagram 3] FIG. 2 is an explanatory diagram illustrating a state in which tire material is fed from each of the supply units arranged in a vertical row on one side of the parallel arrangement in FIG. 1, and the tire material cut to a fixed length is transferred to a slide conveyor. [Figure 4] 4 is an explanatory diagram illustrating the supply system of FIG. 3 in a side view. [Diagram 5] 4 is an explanatory diagram illustrating a state in which the tire material transferred onto the slide conveyor of FIG. 3 is transferred onto a downstream conveyor. FIG. [Figure 6] 6 is an explanatory diagram illustrating a state in which the tire material transferred onto the downstream conveyor in FIG. 5 is supplied to a building drum body to manufacture a cylindrical tire component. FIG. [Figure 7] FIG. 13 is an explanatory diagram illustrating, in a plan view, the state in which the slide conveyor is slid forward of the other of the parallel supply units, and tire material is unloaded from each of the other of the vertically arranged supply units. [Figure 8] 8 is an explanatory diagram illustrating a state in which each tire material fed in FIG. 7 is cut to a fixed length and transferred onto a slide conveyor. FIG. [Figure 9] FIG. 9 is an explanatory diagram illustrating a state in which the slide conveyor on which the tire material cut to a fixed length in FIG. 8 has been transferred is slid between a supply unit on one side and a downstream conveyor which are arranged in parallel. [Figure 10] 10 is an explanatory diagram illustrating a state in which the tire material transferred onto the slide conveyor in FIG. 9 is transferred onto a downstream conveyor. FIG. [Figure 11] 11 is an explanatory view illustrating a state in which the tire material transferred onto the downstream conveyor in FIG. 10 is supplied to a building drum body to manufacture a cylindrical tire component. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a system for supplying a tire material to a building drum body and a method for manufacturing a cylindrical tire component of the present invention will be described based on embodiments shown in the drawings.

[0017] Using a tire material supply system (hereinafter referred to as the supply system) for a molding drum body illustrated in FIG. 1 and FIG. 2, two unvulcanized strip-shaped tire materials M1 and M2 cut to a fixed length are sequentially supplied to the molding drum body 6 and molded into a cylindrical shape. One tire material M1 is applied to the molding drum body 6 in the forward rotation, and the other tire material M2 is applied to the molding drum body 6 in the reverse rotation. In this way, a cylindrical tire member M in which the tire materials M1 and M2 are laminated in two layers is manufactured. For example, two belt materials as the tire materials M1 and M2 are sequentially supplied to the molding drum body 6 and molded into a cylindrical shape, thereby manufacturing a belt layer laminated in two layers as the cylindrical tire member M. This belt layer is used as a component of a green tire G, and a tire T is manufactured by vulcanizing the green tire G.

[0018] The supply system illustrated in FIG. 1 and FIG. 2 includes a supply unit 1 arranged at a stock position P1, a forming drum body 6 that rotates forward and backward, and an upstream conveyor 2 and a downstream conveyor 3 that are arranged vertically between the supply unit 1 and the forming drum body 6. This supply system further includes a slide conveyor 3 arranged between the upstream conveyor 2 and the downstream conveyor 4. A cutter 5 is provided at the boundary between the upstream conveyor 2 and the slide conveyor 3. The upstream conveyor 2, the downstream conveyor 4, and the slide conveyor 3 are conveying means such as a belt conveyor or a roller conveyor that conveys the tire materials M1 and M2 in a flat state. The upstream conveyor 2, the downstream conveyor 4, and the slide conveyor 3 are arranged in two levels, one above the other. The X, Y, and Z arrows in the figures indicate the width direction, the front-rear direction, and the height direction of the supply system, respectively, and are perpendicular to each other. In the figures, the direction from the conveyor toward the forming drum 6 in the front-rear direction (Y direction) is the front.

[0019] The supply unit 1 includes vertically arranged supply units 1A, 1A and vertically arranged supply units 1B, 1B arranged in parallel. Tire materials M1, M2 are stocked in a wound state in the vertically arranged supply units 1A, 1A, respectively. Tire materials M1, M2 are also stocked in a wound state in the vertically arranged supply units 1B, 1B, respectively.

[0020] Each supply unit 1 has a winding core, and tire materials M1, M2 are stored in a wound state around the winding core. Tire materials M1, M2 are wound around the winding core together with a release liner. In this embodiment, tire materials M1, M2 are wound and stored in a long body state, but tire materials M1, M2 can also be cut to a predetermined length and stored in a wound state around the winding core.

[0021] An upstream conveyor 2 is disposed for each of the supply units 1 (1A, 1A, 1B, 1B). As illustrated in FIG. 2, the upstream conveyors 2 disposed for the front supply units 1A, 1B are short and disposed in the lower tier of the two upper and lower tiers. The upstream conveyors 2 disposed for the rear supply units 1A, 1B are long and disposed in the upper tier of the two upper and lower tiers. The front end of each upstream conveyor 2 disposed in the upper tier and the front end of each upstream conveyor 2 disposed in the lower tier are substantially at the same position in the front-to-rear direction.

[0022] The rear ends of the upper and lower downstream conveyors 4 are located at substantially the same position in the front-to-rear direction. The front end of the upper downstream conveyor 4 is located above the forming drum body 6, and the front end of the lower downstream conveyor 4 is located below the forming drum body 6. The conveying surface of the upper downstream conveyor 4 is on the lower side, which is different from the other conveyors (which have conveying surfaces on the upper side). A magnet is disposed on the back side of the conveyor belt of the upper downstream conveyor 4, and the metal wires constituting the tire materials M1, M2 are attracted to the magnetic force of this magnet, so that the tire materials M1, M2 are held on the conveying surface of the upper downstream conveyor 4 and conveyed.

[0023] The upper and lower two-stage slide conveyors 3, 3 slide and move integrally in the parallel direction of the respective supply units 1A, 1B between the respective upstream conveyors 2, 2 and the respective downstream conveyors 4, 4. The rear ends of the upper and lower two-stage slide conveyors 3, 3 are located at substantially the same position in the front-to-rear direction, and the respective front ends are located at substantially the same position in the front-to-rear direction.

[0024] In this embodiment, when the tire materials M1, M2 are supplied, the building drum 6 and the respective downstream conveyors 4 installed at predetermined fixed positions are arranged in series with the respective supply units 1A, 1A and their upstream conveyors 2, 2 arranged in parallel on one side (vertically arranged in the Y direction).

[0025] As shown in Fig. 2, the conveying surfaces of the upstream conveyor 2, slide conveyor 3 and downstream conveyor 4 arranged in the upper stage of the two upper and lower stages are set to be uniformly inclined upward at a predetermined inclination angle S1 (positive angle) with respect to the horizontal toward the forming drum body 6 in a side view. The conveying surfaces of the upstream conveyor 2, slide conveyor 3 and downstream conveyor 4 arranged in the lower stage of the two upper and lower stages are set to be uniformly inclined downward at a predetermined inclination angle S2 (negative angle) with respect to the horizontal toward the forming drum body 6 in a side view. The inclination angle S1 is, for example, 3° to 20°, and the inclination angle S2 is, for example, minus 3° to minus 20°.

[0026] The gap between the upstream conveyor 2 and the slide conveyor 3, which are adjacent in the front-rear direction, is set as small as possible. Also, the gap between the slide conveyor 3 and the downstream conveyor 4, which are adjacent in the front-rear direction, is set as small as possible.

[0027] The cutter 5 cuts the tire materials M1, M2 at an angle to the width direction, and cuts them to a preset, fixed length. In this embodiment, a cutter 5 that slides together with the upper slide conveyor 3 and a cutter 5 that slides together with the lower slide conveyor 3 are provided. Each cutter 5, 5 can cut the tire materials M1, M2 at a desired angle to the width direction.

[0028] The forming drum body 6 rotates forward and backward about a drum axis C. The drum axis C extends in the X direction (parallel to the X direction).

[0029] Next, an example of a procedure for manufacturing a cylindrical tire member M using this supply system will be described.

[0030] In this supply system, cylindrical tire components M are continuously manufactured. In some cases, the production may be switched to a tire component M of different specifications midway. When a large number of tire components M are continuously produced without changing the specifications, the necessary amounts of tire materials M1 and M2 used for the specifications are stocked in the parallel supply units 1A, 1A and supply units 1B, 1B at the stock position P1.

[0031] When manufacturing a tire component M with specifications changed midway, at the stock position P1, the necessary amounts of tire materials M1, M2 according to the specifications of the tire component M to be manufactured are stocked for each of the parallel supply units 1A, 1A arranged in vertical line on one side and each of the parallel supply units 1B, 1B arranged in vertical line on the other side.

[0032] 3 and 4, tire material M2 is fed from the rear supply unit 1A aligned vertically on one side of the stock position P1 to the upstream conveyor 2 arranged in the upper stage. Also, tire material M1 is fed from the front supply unit 1A to the upstream conveyor 2 arranged in the lower stage.

[0033] The tire material M2 shown in Fig. 3 and Fig. 4 is transferred to the slide conveyor 3 and downstream conveyor 4 arranged in the upper stage as shown in Fig. 5. Similarly, the tire material M1 shown in Fig. 3 and Fig. 4 is transferred to the slide conveyor 3 and downstream conveyor 4 arranged in the lower stage as shown in Fig. 5. Between the upstream conveyor 2 and the slide conveyor 3, the tire materials M1 and M2 are cut to a fixed length by the cutter 5. Therefore, the tire materials M1 and M2 cut to a fixed length are transferred to the slide conveyor 3 and downstream conveyor 4 as shown in Fig. 5.

[0034] 6, tire materials M1, M2 transferred onto the respective downstream conveyors 4 are sequentially supplied to and wound around the building drum body 6. In this manner, the respective tire materials M1, M2 are supplied via the upper and lower two-stage slide conveyors 3 to the respective downstream conveyors 4 and the building drum body 6, which are installed at predetermined fixed positions.

[0035] The tire material M2 transferred to the downstream conveyor 4 arranged in the upper stage is wound around the forming drum body 6 while the forming drum body 6 is rotated forward about the drum axis C, and is formed into a cylindrical shape. Next, the tire material M1 transferred to the downstream conveyor 4 arranged in the lower stage is wound around the forming drum body 6 while the forming drum body 6 is rotated backward about the drum axis C, and is formed into a cylindrical shape. In this way, the tire materials M1 and M2 are formed into cylindrical shapes and stacked to produce a cylindrical tire member M.

[0036] When a predetermined number of tire components M are manufactured, the tire materials M1, M2 stored in the respective supply units 1A, 1A aligned vertically on one side of the parallel direction become empty at the stock position P1. In this case, the tire materials M1, M2 can be supplied from the supply units 1B, 1B by integrally sliding the upper and lower two-stage slide conveyors 3, 3.

[0037] 7, the upper and lower two-stage slide conveyors 3 are slid together from a position in front of the supply units 1A, 1A on one side arranged in parallel at the stock position P1 to a position in front of the supply units 1B, 1B on the other side. Then, the tire material M2 is fed from the rear supply unit 1B arranged in vertical rows to the upstream side conveyor 2 arranged in the upper stage. Also, the tire material M1 is fed from the front supply unit 1B to the upstream side conveyor 2 arranged in the lower stage.

[0038] 8, the tire material M2 is transferred to a slide conveyor 3 arranged in an upper stage, and the tire material M1 is transferred to a slide conveyor 3 arranged in a lower stage. The tire materials M1 and M2 are cut to a fixed length by respective cutters 5 between the upstream conveyor 2 and the slide conveyor 3.

[0039] 9, the upper and lower two-stage slide conveyors 3, 3 on which the cut-to-length tire materials M1, M2 are transferred are slid from the front position of the supply units 1B, 1B on the other side to the front position of the supply units 1A, 1A on one side. That is, the upper and lower two-stage slide conveyors 3, 3, the upper and lower two-stage downstream conveyors 4, 4 arranged at predetermined fixed positions, and the building drum body 6 are arranged in series.

[0040] Next, as illustrated in Fig. 10, the tire materials M1, M2 are transferred from the slide conveyors 3, 3 to downstream conveyors 4, 4. Next, as illustrated in Fig. 11, the tire materials M1, M2 are sequentially supplied to a building drum body 6 and stacked to produce a cylindrical tire member M.

[0041] While the tire materials M1, M2 fed from the respective supply units 1B, 1B are being supplied to the building drum body 6, the respective vacant supply units 1A, 1A arranged in series on one side are replaced with new supply units 1A, 1A in which the tire materials M1, M2 are stocked.

[0042] In this supply system, tire materials M1 and M2 to be pasted on one forming drum body 6 in a forward rotation and a reverse rotation are sequentially supplied to the forming drum body 6 in a fixed-length cut state via a conveying path by an upper upstream conveyor 2, a slide conveyor 3, and a downstream conveyor 4 that are uniformly inclined upward at a predetermined inclination angle S1, and a conveying path by a lower upstream conveyor 2, a slide conveyor 3, and a downstream conveyor 4 that are uniformly inclined downward at a predetermined inclination angle. Therefore, when each tire material M1, M2 is transferred to each conveyor, unexpected external forces and the like are unlikely to act on the tire materials M1, M2, and the tire materials M1, M2 can be transferred smoothly. Accordingly, there is no need to excessively slow down the conveying speed of the tire materials M1, M2. Therefore, it is advantageous to quickly supply the tire materials M1, M2 to the forming drum body 6 while suppressing the occurrence of unnecessary deviations and wrinkles of each tire material M1, M2.

[0043] In order to prevent the occurrence of unnecessary shifts and wrinkles in the respective tire materials M1, M2, it is preferable to make the absolute values ​​of the respective inclination angles S1, S2 as small as possible (to make each inclination close to horizontal) and to make the difference in the absolute values ​​of the inclination angles S1, S2 as small as possible (to make each inclination equal). However, since making the absolute values ​​of the respective inclination angles S1, S2 small will lengthen the conveying path, each absolute value needs to be, for example, 3° or more. It is preferable to make the difference in the absolute values ​​of the respective inclination angles S1, S2, for example, 5° or less, and more preferably 3° or less.

[0044] In this supply system, in order to supply tire materials M1, M2 from the parallel supply units 1A, 1A arranged vertically on one side and the parallel supply units 1B, 1B arranged vertically on the other side to the building drum body 6, it is sufficient to slide the upper and lower two-stage slide conveyors 3, 3 together, and there is no need to move the supply unit 1, so no excessive space is required. Therefore, this is advantageous in making the supply system compact.

[0045] When the tire materials M1, M2 of either one of the parallel supply units 1A, 1A on one side and the parallel supply units 1B, 1B on the other side become empty, either one of the tire materials M1, M2 can be replenished while the other of the tire materials M1, M2 is being supplied to the building drum body 6. Therefore, the tire materials M1, M2 can be continuously supplied to the building drum body 6 from the supply units 1A, 1A on one side and the supply units 1B, 1B on the other side. This is therefore advantageous in reducing time loss caused by the replenishment of the tire materials M1, M2.

[0046] Accordingly, in order to reduce time loss caused by replenishing the tire materials M1 and M2, there is no need to place and stock excess amounts of tire materials M1 and M2 on the downstream conveyors 4 and the like. Therefore, the lengths of the downstream conveyors 4, 4, the slide conveyors 3, 3, and the upstream conveyors 2, 2 can be minimized. As a result, it is more and more advantageous to make this supply system compact.

[0047] Making the slide conveyor 3 and downstream conveyor 4 shorter is advantageous in making the supply system more compact. The slide conveyor 3 and downstream conveyor 4 only need to be longer than the length of one of the tire materials M1 and M2 to be placed. Therefore, the length of the slide conveyor 3 and downstream conveyor 4 is, for example, 100% to 150% of the length of one of the tire materials M1 and M2 to be placed on the conveyors, more preferably 105% to 130%, and even more preferably 105% to 120%. Note that the upstream conveyor 2 does not need to be longer than the length of one of the tire materials M1 and M2 to be placed, so it should be as short as possible.

[0048] Therefore, use of this supply system is advantageous in producing the cylindrical tire member M in which the tire materials M1, M2 are shaped into a cylindrical form and stacked, in a space-saving manner and with good productivity.

[0049] By cutting the tire materials M1 and M2 to a fixed length, the tire materials M1 and M2 shrink over time, and the degree of shrinkage varies. However, at the stock position P1, the tire materials M1 and M2 are stored in a long body state, and the tire materials M1 and M2 are fed from the supply unit 1 and then cut to a fixed length. The tire materials M1 and M2 cut to a fixed length are then supplied to the molding drum body 6 via the slide conveyor 3 and the downstream conveyor 4. In this way, cutting the tire materials M1 and M2 to a fixed length immediately before the production of the tire component M is advantageous in minimizing the shrinkage of the tire materials M1 and M2 over time and the variation in the amount of shrinkage, compared to the case where the tire materials M1 and M2 are cut to a fixed length in advance and stored. As a result, this contributes to improving the quality of the tire T manufactured using this tire component M.

[0050] At the stock position P1, the parallel supply units 1A, A1 on one side are set as the main supply unit, and the slide conveyors 3, 3 are slid and fixed to a position in front of the main supply units 1A, 1A, so that a supply path to the forming drum body 6 can be formed by the main supply units 1A, 1A, the upstream conveyors 2, 2, the fixedly arranged slide conveyors 3, 3, and the downstream conveyors 4, 4. In the supply path for the tire materials M1, M2 thus formed, it is not necessary to slide the slide conveyors 3, 3, so that the tire component M can be formed more quickly, which is advantageous for improving productivity. It also contributes to reducing the energy required for manufacturing the tire component M.

[0051] However, when tire materials M1, M2 are supplied to the building drum body 6 from the other of the parallel supply units 1B, 1B, it is necessary to slide and move the slide conveyors 3, 3 every time the tire materials M1, M2 are supplied from the supply units 1B, 1B to the downstream conveyors 4, 4 and the building drum body 6. This is disadvantageous for improving the productivity of the tire component M and is also disadvantageous for reducing the energy required for manufacturing the tire component M.

[0052] Therefore, in the case where tire materials M1, M2 of the same specifications are stocked in the supply units 1A, 1A on one side and the supply units 1B, 1B on the other side arranged in parallel at the stock position P1, when the tire materials M1, M2 stocked in the main supply units 1A, 1A become empty, the slide conveyors 3, 3 are slid to a position in front of the new main supply units 1A, 1A and fixed therein as soon as the work of replacing the empty main supply units 1A, 1A with new main supply units 1A, 1A in which the tire materials M1, M2 are stocked is completed. Then, a supply path to the building drum body 6 is formed by the new main supply units 1A, 1A, the upstream conveyors 2, 2, the fixed slide conveyors 3, 3 and the downstream conveyors 4, 4, and the tire materials M1, M2 can be supplied from the new main supply units 1A, 1A.

[0053] In this way, forming the supply paths for the tire materials M1, M2 by reducing the frequency of sliding the slide conveyors 3, 3 is more advantageous for improving the productivity of the tire component M compared to the case where the tire materials M1, M2 are continuously supplied to the building drum body 6 from the supply units 1B, 1B on the other side, respectively, and further contributes to reducing the energy required for manufacturing the tire component M. In order to use the main supply units 1A, 1A as the supply paths for the tire materials M1, M2 for a long period of time rather than the supply units 1B, 1B on the other side, for example, the stock amounts of the tire materials M1, M2 in the supply units 1A, 1A are made greater than the stock amounts in the supply units 1B, 1B on the other side.

[0054] The tire materials M1 and M2 applied to this supply system are not limited to belt materials. Various tire materials M1 and M2 that are applied in forward and reverse rotation to one building drum body 6 can be applied to this supply system. In addition, the building drum body 6 is not limited to various general well-known building drums, and may be, for example, a so-called rigid core having an outer surface substantially the same as the inner surface of the tire T to be manufactured. [Explanation of symbols]

[0055] 1(1A, 1B) Tire material supply unit 2 Upstream conveyor 3 Slide Conveyor 4 Downstream conveyor 5. Cutter 6. Forming drum body M Cylindrical tire component M1, M2 tire materials

Claims

1. The system includes: supply units arranged at a stock position to supply band-shaped tire materials to be pasted on a forming drum body in forward rotation and in reverse rotation; the forming drum body which rotates forward and reverse; and an upstream conveyor and a downstream conveyor which are vertically arranged between the respective supply units and the forming drum body, the upstream conveyor and the downstream conveyor being arranged in two tiers, one above the other; The tire material fed from one of the supply units arranged in series to the upstream conveyor arranged in the upper tier is transferred to the downstream conveyor in a state in which it is cut to a fixed length, and the tire material fed from the other supply unit arranged in series to the upstream conveyor arranged in the lower tier is transferred to the downstream conveyor in a state in which it is cut to a fixed length, In a tire material supply system to a building drum body, the tire materials transferred to each of the downstream conveyors are sequentially supplied to the building drum body and wound thereon to manufacture a stacked cylindrical tire component, At the stock position, the supply unit in which the tire material to be applied in a forward rotation is wound and stored, and the supply unit in which the tire material to be applied in a reverse rotation is wound and stored are vertically arranged, and the vertically arranged supply units are arranged in parallel, and the upstream conveyor is disposed for each of the supply units, a slide conveyor having two upper and lower stages that slide and move in a parallel direction of each of the supply units between each of the upstream conveyors and each of the downstream conveyors; The conveying surfaces of the upstream conveyor, the slide conveyor and the downstream conveyor arranged in the upper stage of the upper and lower two stages are set to be uniformly inclined upward at a predetermined inclination angle with respect to the horizontal toward the forming drum body in a side view, and the conveying surfaces of the upstream conveyor, the slide conveyor and the downstream conveyor arranged in the lower stage of the upper and lower two stages are set to be uniformly inclined downward at a predetermined inclination angle with respect to the horizontal toward the forming drum body in a side view, The tire materials fed from the respective supply units arranged vertically on one side of the parallel direction to the respective upstream conveyors are cut to a fixed length and then transferred to the respective downstream conveyors via the respective slide conveyors, with respect to the forming drum body and the respective downstream conveyors installed at predetermined fixed positions, and are sequentially supplied to the forming drum body; When each of the tire material stocked in each of the supply units arranged vertically on one side of the parallel direction becomes empty, each of the tire material fed out to the respective upstream conveyors from each of the supply units arranged vertically on the other side of the parallel direction is cut to a fixed length, transferred to each of the downstream conveyors via each of the slide conveyors, and sequentially supplied to the forming drum body, and while the tire material is being supplied to the forming drum body from each of the supply units arranged vertically on the other side of the parallel direction, each of the supply units arranged vertically on one side of the parallel direction that has become empty is replaced with a new supply unit in which the tire material is stocked.

2. 2. The tire material supply system to a building drum body according to claim 1, wherein the building drum body and the respective downstream conveyors installed at the predetermined fixed positions, the respective supply units arranged in series on one side of the parallel direction, and the respective upstream conveyors installed for the respective supply units are arranged in series.

3. 3. The system for supplying tire material to a molding drum body as described in claim 2, wherein, when the tire material stored in each of the supply units arranged in vertical rows on one side of the parallel direction becomes empty, as soon as the operation of replacing each of the empty supply units arranged in vertical rows on one side of the parallel direction with a new supply unit in which the tire material is stocked is completed, the tire material is supplied to the molding drum body from each of the new supply units arranged in vertical rows.

4. A method for manufacturing a cylindrical tire component, comprising: using the tire material supply system to a building drum body according to any one of claims 1 to 3; forming each of the tire materials into a cylindrical shape and stacking the tire materials to produce a cylindrical tire component.

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