JP2011225152A - Tire constituting member and device and method of manufacturing tire constituting member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve uniformity in a tire constituting member by restraining a rigidity change at an end when joining mutual ends of the tire constituting member of paralleling a plurality of cords so as to be superposable.SOLUTION: This tire constituting member 10 is pressed by a pressing means 30, and both sides of a cutting position 12 of the tire constituting member 10 are extended and deformed in the parallel direction H of the cords 11. The extended and deformed tire constituting member 10 is cut in the cutting position 12 by a cutting means, and the tire constituting member 10 joined by superposing the mutual cut ends is manufactured. The manufactured tire constituting member 10 is arranged by gradually expanding an interval toward the outside from the inside in the parallel direction H at an interval wider than an interval of the cords 11 except for the end in the plurality of cords 11 of the end.

Description

  The present invention relates to a tire constituent member in which a plurality of cords are arranged in parallel at intervals in a rubber, and a tire constituent member that cuts the tire constituent member and overlaps and joins the cut ends. The present invention relates to a manufacturing apparatus and a manufacturing method.

  A sheet-like tire constituent member used for molding an unvulcanized tire, for example, a carcass ply, is wound around a molding drum and then joined to overlap a leading end and a rear end. . However, if the ends are overlapped and joined, the thickness of the joint and the number of cords are doubled, and the rigidity in the vicinity thereof is increased. It becomes more difficult to expand or deform than the part. In addition, even in a product tire, due to the joint portion, the rigidity is partially increased, or when the internal pressure is filled, the expansion amount is partially reduced, and the surface of the relatively thin side portion is uneven. There is concern about fear. Therefore, from the viewpoint of further improving the uniformity and radial force variation of the tire while dealing with these, it is required to suppress the change in rigidity of the joined end portions.

  On the other hand, for example, the end portion of the tire component member is cut in an oblique manner in the thickness direction to form a cross-sectional triangle shape, and the diagonal cut surfaces are brought into contact with each other to join the end portions having a triangular cross-section shape. They are joined with no difference in level, and changes in the thickness and rigidity of the joint can be suppressed. However, since the carcass ply has a plurality of cords arranged in parallel inside and needs to be cut along the cords in a very narrow range between the cords, it is difficult to cut and join them diagonally. .

  Further, conventionally, a tire component member in which the cords at the end portions are arranged at wider intervals than the cords other than the end portions and the rigidity of the end portions joined by overlapping is suppressed, and the tire component member is manufactured. A manufacturing apparatus is known (see Patent Document 1).

  However, in this conventional tire constituent member, the density and rigidity of the cord are lowered over the entire end portion, and the rigidity changes greatly at the boundary between the end portion and a portion other than the end portion. Therefore, when the overlapping width between the end portions is narrowed, the rigidity is partially reduced on both outer sides of the joining portion between the end portions, and conversely, when the overlapping width is widened, the rigidity is obtained at both end portions of the joining portion. Is partially higher. As described above, in the conventional tire constituent member, the overlap between the end portions and the variation in joining greatly affect the rigidity change at the end portions, and the difference in rigidity generated at the end portions after joining tends to increase. There is a need for further improvement in the uniformity of tire components. Moreover, this tire component manufacturing apparatus manufactures the tire component with a relatively complicated configuration and operation, and there is a problem that the cost required for manufacturing the tire component increases.

JP 2001-294014 A

  The present invention has been made in view of the above-described conventional problems. The purpose of the present invention is to change the rigidity at the ends when the ends of tire constituent members having a plurality of cords arranged in parallel are joined together. It is suppressing and improving the uniformity of the tire constituent member after joining. Moreover, it is to manufacture such a tire constituent member with a simple configuration and operation, and to reduce the cost required for the manufacture.

The present invention is a tire constituent member in which a plurality of cords are arranged in parallel at intervals in rubber, and end portions in the parallel direction of the cords are overlapped and joined to each other. Further, it is characterized in that it is arranged with an interval wider than the interval of the cords other than the end portions, and the interval is gradually increased from the inner side to the outer side in the parallel direction.
Moreover, this invention manufactures the tire structural member which cut | disconnects the tire structural member arrange | positioned in parallel in rubber | gum in rubber | gum along a code | cord | chord, and the cut | disconnected edge parts overlap and are joined. A device for manufacturing a tire constituent member, the pressing means for pressing the tire constituent member to stretch and deform portions on both sides of the cutting position in the parallel direction of the cord, and cutting for cutting the stretched and deformed tire constituent member at the cutting position Means.
Furthermore, the present invention manufactures a tire constituent member in which a tire constituent member in which a plurality of cords are arranged in parallel in rubber is cut along the cord, and the cut ends are overlapped and joined. A method for manufacturing a tire constituent member, the step of pressing the tire constituent member to stretch and deform portions on both sides of the cutting position in the parallel direction of the cord, and cutting to cut the stretched and deformed tire constituent member at the cutting position And a process.

  According to the present invention, when end portions of tire constituent members in which a plurality of cords are arranged are overlapped and joined, the change in rigidity at the end portions is suppressed and the uniformity of the tire constituent members after joining is improved. be able to. Moreover, such a tire constituent member can be manufactured with a simple configuration and operation, and the cost required for the manufacture can be reduced.

It is a perspective view which shows the manufacturing apparatus of the tire structural member of this embodiment. It is sectional drawing which shows the tire structural member pressed by the press means. It is a principal part perspective view which shows the cutting means of the tire structural member of this embodiment. It is sectional drawing which shows the edge part of the tire structural member after manufacture. It is sectional drawing which shows the edge part to which the tire structural member was joined. It is a principal part front view which shows the press means which presses a tire structural member with a press roller. It is a principal part front view which shows the press means which presses a tire structural member with a press roller.

DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a tire constituent member, a tire constituent member manufacturing apparatus (hereinafter referred to as a manufacturing apparatus) and a manufacturing method of the present invention will be described with reference to the drawings.
The manufacturing apparatus according to the present embodiment cuts members (tire constituent members) that constitute each part of a tire formed of rubber, and the cut end parts such as a carcass ply and various reinforcing members are overlapped and joined. A tire constituent member is manufactured.

  The tire component is a sheet member formed in a sheet shape from unvulcanized rubber and a plurality of cords, and a plurality of linearly extending cords are parallel to each other in the rubber (rubber sheet), and They are arranged in parallel at a predetermined interval. Moreover, a manufacturing apparatus manufactures the tire structural member which cut | disconnects a tire structural member along a code | cord | chord and overlaps and joins the edge part of a predetermined range from a cut end. A plurality of tire constituent members after manufacture are arranged side by side, and end portions are sequentially joined, or wound around a forming drum, and both end portions (front and rear end portions) are overlapped and joined on the forming drum. Below, the example which manufactures the carcass ply by which the carcass ply which is a tire structural member is cut | disconnected in the manufacturing process of an unvulcanized tire, and both ends parallel to a code | cord | chord are joined on a shaping | molding drum is demonstrated.

FIG. 1 is a perspective view schematically showing a schematic configuration of the manufacturing apparatus.
As shown in the figure, the manufacturing apparatus 1 includes a conveying means 20 for conveying the tire constituent member 10, a pressing means 30 for pressing and compressing the tire constituent member 10 with a pressing body, and a cutting means for the tire constituent member 10 described later. (Not shown).

  The conveying means 20 is composed of belt conveyors provided on both sides of the pressing means 30 and has endless belts 23 and 24 that are spanned around a plurality of (one shown in FIG. 1) belt wheels 21 and 22, respectively. . In the conveying means 20, the belts 23 and 24 on both sides are arranged side by side along the conveying direction of the tire constituent member 10 (the direction of arrow T in FIG. 1), and the belts 23 and 24 are moved by a driving device (not shown). Drive in the same direction at the same speed synchronously. Thereby, the conveyance means 20 conveys the tire constituent members 10 before and after cutting placed on the upper surfaces of the belts 23 and 24 in the conveyance direction T by a predetermined distance (length). Further, the conveying means 20 is configured to manufacture the tire constituent member 10 in a direction (left and right direction in FIG. 1) orthogonal to a direction in which a plurality of cords (part of the cords 11 are indicated by dotted lines in FIG. 1) extend. The predetermined distance set according to the distance is moved and stopped.

  The pressing means 30 includes a supporting member 40 disposed on the lower surface side of the tire constituent member 10, a pressing member 50 disposed above the supporting member 40 across the tire constituent member 10, and both sides sandwiching the pressing member 50. It has a pair of pressing members 31 arranged.

  The support member 40 is a block-shaped support base that supports the tire constituent member 10 at the cutting position at the time of expansion deformation or cutting, and the upper tire constituent member 10 is entirely disposed on the flat upper surface (support surface 41). Support from below. Further, the support member 40 is disposed between the belts 23 and 24 of the transport means 20 so that the support surface 41 is positioned slightly below the tire constituent member 10 being transported. Furthermore, the support member 40 has a concave groove 42 extending along the cutting position of the tire constituent member 10 at the center of the support surface 41, and the concave groove 42 cuts the support surface 41 in a direction parallel to the cord 11. And is arranged on the entire lower side of the tire constituent member 10. The concave groove 42 is a linear groove formed to have a dimension in which the lower end side of the pressing member 50 can be inserted, and the cross-sectional shape in the width direction corresponds to the cross-sectional shape of the pressing member 50 to be inserted (triangular shape, (Rectangular shape, semicircular shape, etc.), and is arranged to face the entire lower end of the pressing member 50.

  The pressing member 50 is a pressing body that presses the lower tire constituent member 10 toward the support member 40. The pressing member 50 is long enough to press the entire tire constituent member 10 on the concave groove 42 at a time, and the lower end side is gradually thinner. It is formed in a long plate shape. In addition, the pressing member 50 is disposed above the concave groove 42 with the tire constituent member 10 interposed therebetween, and moves in a vertical direction by a moving mechanism (not shown) described later to contact and separate from the tire constituent member 10. The tire constituent member 10 is pressed with a predetermined pressure. By this pressing, the pressing member 50 pushes the tire constituent member 10 into the concave groove 42 from the opening of the concave groove 42 and deforms the tire constituent member 10 according to the inner surface of the concave groove 42 while extending.

  The pair of pressing members 31 has a rectangular bar shape with a rectangular cross section, are arranged in parallel on both sides of the pressing member 50, and are respectively positioned above the support surface 41 of the support member 40 with the tire constituent member 10 interposed therebetween. Further, each pressing member 31 is moved up and down by a moving mechanism (not shown) described later to contact and separate from the tire constituent member 10, and presses the tire constituent member 10 with the support surface 41. The pressing means 30 presses the tire constituent member 10 by lowering the pressing member 50 after pressing the tire constituent member 10 in a stopped state on both sides of the pressing member 50 by the pair of pressing members 31. The pressing means 30 raises the pressing member 50 to release the pressing of the tire constituent member 10, and then raises the pair of pressing members 31 to separate from the tire constituent member 10.

2 is a cross-sectional view showing the tire constituent member 10 pressed by the pressing means 30, and shows a part of the manufacturing apparatus 1 in the vicinity of the tire constituent member 10 and the support member 40 viewed from the direction of the arrow X in FIG. ing.
Here, as shown in the figure, the concave groove 42 of the support member 40 is formed so that the width gradually decreases from the opening at the upper end toward the groove bottom, and the wall surfaces 43 on both sides are curved surfaces that are gently curved. It has become. On the other hand, in the pressing member 50, both side surfaces on the lower end side constitute a pressing surface 51 that presses the tire constituent member 10 and presses it into the concave groove 42, and the pressing surface 51 that curves corresponding to the wall surface 43. Thus, the lower end portion is formed in a tapered shape (triangular section).

  The pressing means 30 includes a moving mechanism 52 for the pressing member 50 disposed above the pressing member 50 and a moving mechanism 32 for the pressing member 31 disposed above each of the pair of pressing members 31. Each moving mechanism 52, 32 is composed of one or a plurality of piston / cylinder mechanisms or the like disposed downward, and each of the moving mechanisms 52, 32 is attached to the tip thereof by piston rods 52P, 32P that advance and retreat from the cylinders 52S, 32S. The members 50 and 31 are moved in the vertical direction.

  The pressing means 30 moves the pressing member 31 by the moving mechanism 32 and presses the tire constituent member 10 on the support surface 41 by the pair of pressing members 31 on both sides of the concave groove 42 of the supporting member 40. Thereby, when the pressing member 50 presses the tire constituent member 10, it is possible to prevent the outer tire constituent member 10 between the pair of pressing members 31 from being deformed due to the force caused by the pressing. Further, the pressing means 30 moves the pressing member 50 by the moving mechanism 52, presses the tire constituent member 10 with the pressing surface 51 of the pressing member 50 and presses it into the concave groove 42, and the tire between the pair of pressing members 31. The constituent member 10 is extended and deformed along the wall surface 43 of the concave groove 42.

  At that time, the pressing means 30 presses the position (cutting position 12) to be cut of the tire constituent member 10 with the pressing member 50, and presses the rubber on both sides around the cutting position 12 extending in parallel with the cord 11. The tire constituent member 10 is partially deformed by stretching in the direction. Along with this deformation, the tire component 10 is thinned by extending the rubber between the pressing portion and the periphery while the interval between the cords 11 is widened. In this way, the pressing means 30 extends and deforms the portions on both sides of the cutting position 12 of the tire constituent member 10 in the parallel direction of the cord 11 (the direction indicated by the arrow H in FIG. 2), and at the same time, at the tip of the pressing member 50. The tire constituent member 10 at the cutting position 12 is bent in the concave groove 42.

  The parallel direction H of the cords 11 is a direction in which the plural cords 11 are arranged in the tire constituent member 10 and is a direction orthogonal to the cords 11 in the parallel plane of the plural cords 11. Further, the tire constituent member 10 to be stretched and deformed is overlapped and joined after being cut at the cutting position 12 such as a range from the cutting position 12 to 15 mm on both sides, or a range in which ten cords 11 are arranged. This is a predetermined range consisting of end portions. In addition, the amount of expansion deformation of the tire constituent member 10 changes according to the amount pushed into the concave groove 42 by the pressing member 50, and the portion pressed against the tip of the pressing member 50 expands the largest, The amount of extensional deformation gradually increases from the pressing member 31 toward the tip of the pressing member 50 (cutting position 12). As a result, the cord 11 in the tire constituent member 10 changes in accordance with the amount of expansion deformation, and at the cutting position at a relatively narrow interval close to the normal portion that does not undergo expansion deformation on the pair of pressing members 31 side. They are arranged at relatively wide intervals on the 12 side.

  After the expansion and deformation, the manufacturing apparatus 1 separates the pressing member 50 and the pressing member 31 from the tire constituent member 10 and conveys the tire constituent member 10 by the conveying means 20 (see FIG. 1) to a cutting table (not shown). It arrange | positions and the tire structural member 10 is cut | disconnected along the cutting position 12 on a cutting stand. Alternatively, without conveying the tire component 10, the pressing member 50 and the moving mechanism 52 are moved to the outside of the tire component 10 (for example, the upper side in FIG. 1), and the cutting means is moved outside the tire component 10 (for example, It is moved from the lower side of FIG. By this cutting means, the tire constituent member 10 on the support member 40 is cut along the cutting position 12 in the concave groove 42 following the stretching deformation.

FIG. 3 is a perspective view of a main part showing a cutting means 60 for cutting the tire constituent member 10 on the support member 40, and schematically shows a state in which the cutting means 60 is arranged in place of the pressing member 50.
As shown in the figure, the cutting means 60 has a pair of cutters 61 and 62 for cutting the tire constituent member 10 above the support member 40, and the cutters 61 and 62 are located between the inside and the outside of the groove 42. It is configured to be movable.

  The cutting means 60 presses the cutters 61 and 62 brought close to each other by a moving means (not shown) against the tire constituent member 10 at the center in the longitudinal direction of the concave groove 42, and the cutters 61 and 62 are moved along the concave groove 42. They are moved in opposite directions (arrows K1, K2 in FIG. 3). The cutting means 60 is parallel to the cord 11 at a predetermined position (here, the cutting position 12 in the central portion) in a range where the tire constituent member 10 in the groove 42 is stretched and deformed by the moving cutters 61 and 62. Cut straight. Accordingly, the cutting means 60 cuts the tire component member 10 that has been stretched and deformed at the cutting position 12, and forms end portions of the tire component member 10 that are overlapped and joined to both sides of the cutting position 12.

  The manufacturing apparatus 1 of the present embodiment presses the tire constituent member 10 with the pressing member 50 (see FIG. 2), and the tire constituent members 10 on both sides of the cutting position 12 are extended and deformed in the parallel direction H of the cord 11 within a predetermined range. The tire constituent member 10 that has been stretched and deformed is cut at the cutting position 12. Next, the transporting means 20 (see FIG. 1) transports the cut tire constituent members 10 on both sides by a predetermined distance, and sets the next cutting position 12 of the tire constituent members 10 in the width direction of the concave grooves 42. It moves to the center part of this, and it arrange | positions facing the lower end of the press member 50. FIG. The manufacturing apparatus 1 repeats these steps, and sequentially cuts tire constituent members 10 in which a plurality of cords 11 are arranged in parallel at intervals in the rubber along the cords 11, and the cut ends The tire constituent members 10 to be bonded together are continuously manufactured.

FIG. 4 is a cross-sectional view showing an end portion of the tire constituent member 10 after manufacture.
As shown in the figure, the tire constituent member 10 has a plurality of cords 11 positioned at the joined end portion 13 at a wider interval than a plurality of cords 11 located at a portion other than the end portion 13 (non-joined portion). It is arranged with. Further, the plurality of cords 11 at the end 13 are arranged at least partially at different intervals, and the inside (non-joined portion side) (left side in FIG. 4) and the outside (the tire constituent member 10) of the cord 11 in the parallel direction H. (The rightmost position in FIG. 4) and a gap is provided.

  Specifically, the plurality of cords 11 at the end portion 13 are changed from one to the other in the parallel direction H by changing the intervals one by one along the parallel direction H so that the adjacent intervals are different. The intervals are gradually increased. Alternatively, the plurality of cords 11 are arranged with a gradually increasing interval from the inner side to the outer side in the parallel direction H while providing portions where the same interval continues along the parallel direction H. In this way, the plurality of cords 11 at the end 13 are continuously continuous from the inner side to the outer side in the parallel direction H so that the outermost gap G2 is wider than at least the innermost gap G1 in the parallel direction H. Alternatively, the intervals are discontinuously widened gradually.

  In addition, in the tire constituent member 10, although the thickness of the end portion 13 to be joined varies depending on the position of the cord 11, the stretch deformation rate of the rubber between the cords 11, the end portion 13 is the end portion 13. It is formed thinner than other parts. That is, the end portion 13 of the tire constituent member 10 has a thick portion where the cord 11 is located and a thin portion between the cords 11, and the thickness between the cords 11 also varies. The (average thickness) is thinner than the thickness of the non-joined portion other than the end portion 13. The tire constituent member 10 is wound around a forming drum (not shown), and then the end portions 13 of the cord 11 in the parallel direction H are overlapped and joined to form a cylindrical shape.

FIG. 5 is a cross-sectional view showing the joined end portion 13 of the tire constituent member 10.
As shown in FIG. 5A, the tire end portions 10 of the tire component 10 are pressed from the outside of the forming drum so that the rubber on the surface is in close contact with each other, and the plurality of cords 11 are adjacent to each other with the rubber interposed therebetween. Arranged. At that time, the plurality of cords 11 at both ends 13 are arranged close to each other in the thickness direction, or one cord 11 is arranged between the other cords 11. However, both end portions 13 are arranged such that an outer portion in the parallel direction H in which the spacing between the cords 11 is wide and an inner portion in the parallel direction H in which the spacing is narrow are adjacent to each other. In accordance with the change, a relatively wide portion and a narrow portion, or portions having an intermediate interval are arranged adjacent to each other. Therefore, as for the end part 13 after joining, as a result of the density change of the cord 11 along the parallel direction H becoming small, the uniformity of the density of the cord 11 becomes high over the whole, and the density between the non-joined part is increased. The difference is also reduced.

  When the unvulcanized tire provided with the tire constituent member 10 is vulcanized and molded, as shown in FIG. 5B, the end portion 13 of the tire constituent member 10 is firmly joined by temperature and pressure acting during vulcanization. Turn into. Moreover, it is crushed in the thickness direction, and the unevenness of the surface disappears or decreases, so that a smooth surface shape is formed. Furthermore, the cord 11 at the end portion 13 is displaced, the cords 11 at the both end portions 13 approach each other, and the plurality of cords 11 of the tire constituent member 10 are arranged more uniformly.

  As described above, in the tire constituent member 10 of the present embodiment, the cords 11 at the end portions 13 are spaced wider than the intervals between the cords 11 other than the end portions 13 and from the inner side to the outer side in the parallel direction H. The intervals are gradually increased. Therefore, as described above, the uniformity of the density of the cord 11 can be increased at the end portion 13 after joining, and the change in rigidity of the tire constituent member 10 in the end portion 13 can be suppressed. Moreover, since the density difference of the cord 11 can be reduced between the end portion 13 and the non-joined portion after joining, high uniformity of rigidity can be secured even in the entire tire constituent member 10. Thereby, when the unvulcanized tire is molded, the end portion 13 (joint portion) of the tire constituent member 10 is easily expanded or deformed, and the end portion 13 is deformed in the same manner as other portions. The shape accuracy can be improved. Further, even in the product tire, it is possible to suppress a partial increase in rigidity, and it is possible to uniformly inflate the product tire when the internal pressure is filled, and to prevent occurrence of unevenness in the side portion due to the difference in the expansion amount. As a result, tire uniformity and radial force variation can be further improved.

  In the tire constituent member 10, the distance between the cords 11 in the end portion 13 is changed as described above, and the rigidity of the end portion 13 is high inside the parallel direction H of the cord 11 and is low outside. At the same time, the change in rigidity at the boundary between the end portion 13 and the portion other than the end portion 13 is also reduced, and the rigidity of the end portion 13 gradually decreases from the portion other than the end portion 13 toward the extreme end position of the tire constituent member 10. It changes to become. As a result, even when the width of the overlap between the end portions 13 fluctuates, the change in rigidity in the vicinity of the above-described boundary is suppressed. Therefore, the effect of the overlap between the end portions 13 and the variation in joining on the change in rigidity. Can be reduced. As a result, the plurality of tire constituent members 10 can be joined equally stably while maintaining a small change in rigidity occurring at the end 13 and the periphery after joining, and high uniformity of the tire constituent members 10 is ensured. Can be secured.

  In addition, when manufacturing such a tire constituent member 10, the manufacturing apparatus 1 according to the present embodiment presses the tire constituent member 10 and stretches and deforms the portions on both sides of the cutting position 12 in the parallel direction H of the cord 11. Then, the tire constituent member 10 is cut at the cutting position 12. Therefore, the tire constituent member 10 can be manufactured with a relatively simple operation, and the manufacturing apparatus 1 can also be realized with a relatively simple configuration.

  Therefore, according to the present embodiment, when the end portions 13 of the tire constituent members 10 in which the plurality of cords 11 are juxtaposed are overlapped and joined to each other, the change in rigidity at the end portions 13 is suppressed, and the tire configuration after joining. The uniformity of the member 10 can be improved. Moreover, such a tire constituent member 10 can be manufactured with a simple configuration and operation, and the cost required for the manufacture can be reduced. Furthermore, since the end portion 13 of the tire constituent member 10 is formed thinner than the portion other than the end portion 13, the end portion 13 after joining can be made relatively thin. Thereby, the rigidity difference resulting from the thickness of the edge part 13 and parts other than the edge part 13 can be made small, and the uniformity of the tire structural member 10 can be improved further.

  Here, the pressing body that presses the tire constituent member 10 is not limited to the pressing member 50 that presses the cutting position 12 of the tire constituent member 10 at a time, and a pressing member that sequentially presses the cutting position 12 separately. A pressing body other than the pressing member 50, such as a pressing roller that rotates and presses, can also be used.

FIG. 6 and FIG. 7 are main part front views showing pressing means for pressing the tire constituent member 10 with a pressing roller, and the tire constituent member 10 is schematically shown in cross section.
As shown in FIG. 6, one pressing means 70 includes a support member 71 in which a plurality of (here, five) concave grooves 71 </ b> A, 71 </ b> B, 71 </ b> C having a rectangular cross section are formed in parallel, and above the support member 71. And a pressing roller 72 disposed on the surface. The plurality of concave grooves 71A, 71B, 71C are formed so that the depths are gradually reduced from the central portion in the parallel direction toward both outer sides, and like the concave groove 42 of the support member 40 described above, It is arrange | positioned in the whole lower side of the tire structural member 10 along the parallel direction.

  A plurality of (here, five) annular members 72A, 72B, 72C are attached to the pressing roller 72 concentrically on the outer periphery of the shaft member 72D and spaced apart from each other in the axial direction. The plurality of annular members 72A, 72B, 72C are formed so that the outer diameters are gradually reduced from the central portion in the axial direction of the pressing roller 72 toward both outer sides, and are respectively disposed in the opposing concave grooves 71A, 71B, 71C. It is arranged so that it can be inserted. These annular members 72A, 72B, and 72C are large-diameter portions that protrude outward in the radial direction of the pressing roller 72, and press the tire constituent member 10 into the concave grooves 71A, 71B, and 71C, respectively. 10 is extended and deformed in the pressing direction. At this time, the tire constituent member 10 changes in the amount of pushing and the amount of extension deformation according to the outer diameter of the annular members 72A, 72B, 72C, and both from the cutting position 12 located in the deepest groove 71A. The amount of stretch deformation gradually decreases toward the outside.

  Thus, the pressing roller 72 is provided with a plurality of outer peripheral portions (annular members 72) having outer diameters that press the tire constituent member 10, and a circular convex portion and a concave portion between the convex portions on the outer peripheral portion. It is provided in order in the axial direction, and the outer periphery is an uneven surface. The pressing means 70 presses the pressing roller 72 against the tire constituent member 10 on the support member 71, and the pressing roller 72 presses the tire constituent member 10 while the tire constituent member 10 is pressed. 10 is moved from one end to the other end. In the meantime, the tire constituent member 10 is pressed by a plurality of outer peripheral portions of the outer diameter provided on the pressing roller 72, and both sides of the tire constituent member 10 sandwiching the cutting position 12 are partially expanded and deformed.

  Thereby, the plurality of cords 11 at the end portion 13 are arranged with the interval gradually widened from the inner side to the outer side in the parallel direction H. Thereafter, the tire constituent member 10 on the support member 71 is cut at the cutting position 12 to manufacture the tire constituent member 10 in which the end portions 13 are overlapped and joined. In the pressing means 70, the above-described effects can be obtained, and the number of outer peripheral portions of the pressing roller 72, the outer diameter, the position, and the like are appropriately set, so that the amount of expansion deformation of the tire constituent member 10 and the cord 11 Can control the interval.

  On the other hand, as shown in FIG. 7, the other pressing means 80 has the same pressing roller 72 as the one pressing means 70, but a support roller 81 is provided below the tire constituent member 10. . In the support roller 81, a plurality (four in this case) of annular members 81A are attached concentrically to the outer periphery of the shaft member 81B and spaced apart from each other in the axial direction. The plurality of annular members 81A are formed to have the same outer diameter, and are disposed so as to be insertable between the annular members 72A, 72B, 72C of the pressing roller 72, respectively.

  The pressing unit 80 presses the pressing roller 72 against the tire constituent member 10 on the support roller 81, presses the tire constituent member 10 with the annular members 72 </ b> A, 72 </ b> B, 72 </ b> C of the pressing roller 72, and the annular member of the supporting roller 81. Push between 81A. Further, the pressing roller 72 and the support roller 81 are moved at the same speed in synchronization by a moving means (not shown), and the tire constituent member 10 is pressed from one end to the other end. Accordingly, as described above, both sides of the tire constituent member 10 across the cutting position 12 are stretched and deformed in the pressing direction, and the plurality of cords 11 of the end portion 13 are spaced from the inner side to the outer side in the parallel direction H. Widen and arrange. Also in this pressing means 80, the amount of expansion deformation of the tire constituent member 10 and the distance between the cords 11 can be controlled by appropriately setting the number, outer diameter, position, etc. of the plurality of outer peripheral portions of the pressing roller 72.

  In addition, the pressing body (the pressing member 50 and the pressing roller 72) of the tire constituent member 10 is provided with heating means (not shown) including, for example, a heater for heating from the inside or the outside, a temperature measurement sensor, and the like. When the component member 10 is pressed, it may be heated to a predetermined temperature. By doing in this way, since the tire component 10 of a press position can be heated and the rubber of the vicinity can be softened, the tire component 10 can be extended and deformed easily and smoothly.

  DESCRIPTION OF SYMBOLS 1 ... Tire manufacturing member manufacturing apparatus, 10 ... Tire constituent member, 11 ... Cord, 12 ... Cutting position, 13 ... End part, 20 ... Conveying means, 21, 22, .. belt wheel, 23, 24 ... belt, 30 ... pressing means, 31 ... pressing member, 32 ... moving mechanism, 40 ... support member, 41 ... support surface, 42 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Pressing means, 71 ··· support member, 72 ··· pressing roller, 80 · · · pressing means, 81 · · · support roller, H · · · parallel direction.

Claims (6)

A tire constituting member in which a plurality of cords are arranged in parallel at intervals in rubber, and end portions in the parallel direction of the cords are overlapped and joined,
The tire constituting member characterized in that the plurality of cords at the end portions are arranged at wider intervals than the cord intervals other than the end portions, and the intervals are gradually increased from the inner side to the outer side in the parallel direction. . In the tire constituent member according to claim 1,
An end part to be joined is formed thinner than a part other than the end part. A tire constituent member manufacturing apparatus that cuts a tire constituent member in which a plurality of cords are arranged in parallel in rubber along the cord and manufactures a tire constituent member in which the cut end portions are overlapped and joined together Because
A pressing means that presses the tire constituent member to extend and deform portions on both sides of the cutting position in the parallel direction of the cord;
Cutting means for cutting the tire component that has been stretched and deformed at a cutting position;
An apparatus for manufacturing a tire constituent member. In the manufacturing apparatus of the tire structural member according to claim 3,
An apparatus for manufacturing a tire constituent member, wherein the pressing means includes a pressing roller provided with a plurality of outer peripheral portions having outer diameters for pressing the tire constituent member. A tire constituent member manufacturing method for manufacturing a tire constituent member in which a tire constituent member in which a plurality of cords are arranged in parallel in rubber is cut along the cord and the cut ends are overlapped and joined together Because
A pressing step of pressing the tire component and extending and deforming the portions on both sides of the cutting position in the parallel direction of the cord;
A cutting step of cutting the stretched and deformed tire component at a cutting position;
The manufacturing method of the tire structural member characterized by having. In the manufacturing method of the tire constituent member according to claim 5,
The method of manufacturing a tire constituent member, wherein the pressing step includes a step of pressing the tire constituent member with outer peripheral portions having a plurality of outer diameters provided on the pressing roller.

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