JP2011126212A - Method and apparatus for butt bonding of sheet-like material, and method for manufacturing tire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily uniformize the bonding strength of sheet-like materials S at a low cost. <P>SOLUTION: Front and back lower claws 21a and 21b, and front and back upper claws 45a and 45b are individually split, and are supported on lower plate 19 and upper plate 43 in a way to be movable independently. This configuration enables the front and back lower claws 21a and 21b, and the front and back upper claws 45a and 45b to evenly contact the lower and upper sides of the front and the back ends of the sheet-like material S, so long as the machining precisions of the front and back lower claws 21a and 21b, and the front and back upper claws 45a and 45b, and their assembly precisions onto the lower plate 19 and the upper plate 43 are on a certain level. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

    The present invention relates to a joining method and apparatus for butt-joining front and rear ends of a sheet-like material, and a tire manufacturing method.

    As a conventional butt-joining apparatus for sheet-like material, for example, a device described in Patent Document 1 below is known.

JP 7-276505 A

  This has a fixed base installed below the sheet-like material whose front and rear ends are inclined at the same angle, and a lower end supported by the fixed base so as to be able to swing, and inclined so as to approach each other as it goes upward. A pair of lower claw groups extending along the front and rear ends of the sheet-like material, a lower urging member for urging the pair of lower claw groups in a standing direction, and the sheet-like material installed above and below the sheet-like material The upper and lower parts are supported swingably at the lower part of the elevator and can be moved closer to and away from the fixed base, and are inclined so as to approach each other toward the lower side, along the front and rear ends of the sheet-like material. A pair of upper claw groups extending upward and an upper urging member that urges the pair of upper claw groups in a standing direction, and each lower claw group has a front end of the sheet-like material on the upper end portion and a lower surface of the rear end portion. A lower nail block having a plurality of lower nails provided with lower joints that can be contacted is A plurality of upper claws are arranged side by side along the front and rear ends of the toroidal material, while each upper nail group is capable of contacting the front and rear end top surfaces of the sheet-like material at the lower end. The upper claw block having a plurality of upper claws provided with a plurality of upper claw blocks is arranged in parallel along the front and rear ends of the sheet-like material.

    However, in such a conventional sheet-like material butt-joining device, in order to bring the upper nail under the upper nail group and the upper nail uniformly into contact with the front, under the rear end, and the upper surface of the sheet-like material, As a result, it is necessary to increase the processing accuracy of the lower and upper nails (each nail in the lower and upper nail blocks) and to increase the assembly accuracy of the lower and upper nail blocks to the fixed base and the lifting platform. However, there is a problem that the entire apparatus becomes expensive and high manufacturing technology is required. Also, if any of the nails (lower and upper nails) is damaged, the nails will be replaced. At this time, only the nail blocks (lower and upper nail blocks) having the nails are replaced with new ones. When the claw block is replaced, the other claw blocks are worn, rattled or the like due to use up to the time of replacement, and thus the bonding strength between the front and rear ends of the sheet material varies. For this reason, when replacing a damaged claw, not only the claw block having the damaged claw, but also a pair of lower and upper claw groups must be replaced, resulting in high costs. There were also challenges.

  It is an object of the present invention to provide a sheet-like material butt-joining method and apparatus, and a tire manufacturing method that can easily make the joining strength of the sheet-like material uniform while being inexpensive.

    The purpose of this is, firstly, a lower base installed below the sheet-like material whose front and rear ends are inclined at the same angle with respect to the front-rear direction, and the lower end of the lower base can be swung. A pair of lower claw groups that are supported and inclined so as to approach each other as they go upward, and extend along the front and rear ends of the sheet material, and a lower urging member that urges the pair of lower claw groups in a standing direction And an upper base that is installed above the sheet-like material and can be moved closer to and away from the lower base, and an upper end of the upper base is swingably supported, and tilts closer to each other as it goes downward. A pair of upper nail groups extending along the front and rear ends of the sheet-like material, and an upper urging member for urging the pair of upper nail groups in a standing direction, and each lower nail group has an upper end portion Lower joints that can contact the lower surface of the front and rear end portions of the sheet-like material are provided, respectively. Each upper nail group has a lower joint that can be in contact with the front surface of the sheet-like material and the upper surface of the rear end portion, respectively. A preparation step for preparing a butt-joining device having a plurality of upper claws provided side by side along the front and rear ends of the sheet-like material, and a lower nail group on the front, rear end lower surface and upper surface of the sheet-like material The lower joint and the upper joint of the upper nail group are brought into contact with each other, so that the upper and lower nails hold the front and rear ends of the sheet-like material from above and below, respectively, The lower claws of each lower nail group divided individually are swung independently in the tilting direction against the lower biasing member, and the upper claws of each upper nail group divided individually By swinging it alone in the tilting direction against the upper biasing member Before, the butt joint method of a sheet-like material and a bonding step of bonding butt trailing each other, can be achieved.

  Secondly, a lower base installed below the sheet-like material whose front and rear ends are inclined at the same angle with respect to the front-rear direction, and a lower end supported on the lower base so as to be swingable, and heading upward And a pair of lower claws extending along the front and rear ends of the sheet material, a lower biasing member for biasing the pair of lower claws in the standing direction, and the sheet material The upper base, which is installed at the top and can be moved closer to and away from the lower base, and the upper end of the upper base is swingably supported. A pair of upper claw groups extending along the rear end, and an upper urging member that urges the pair of upper claw groups in a standing direction, and each lower claw group has an upper end portion in front of the sheet-like material, Lower joints that can contact the lower surface of the rear end part are provided, respectively, along the front and rear ends of the sheet-like material While having a plurality of lower claws arranged side by side, each upper nail group is provided with an upper joint portion that can contact the front surface of the sheet-like material at the lower end portion and the upper surface of the rear end portion, respectively. A plurality of upper claws arranged side by side along the rear end, and the lower joint portion of the lower nail group and the upper joint portion of the upper nail group are brought into contact with the lower surface and upper surface of the rear end portion of the sheet-like material. Thus, after sandwiching the front and rear ends of the sheet-like material from above and below by the upper and lower nails, the lower and upper nails of the lower and upper nail groups Each lower nail group in a sheet-like material butt-joining device in which the front and rear ends of the sheet-like material are butt-joined by swinging in the tilting direction against the upper and lower biasing members. While dividing the lower nails individually and supporting the lower base so that it can swing independently With dividing the upper claw individually for each upper claw group, a butt joint of a sheet material is supported so that it can swing independently to the upper table, it can be achieved.

  And the molding process which shape | molds a green tire using the sheet-like material by which the front and back ends were butt-joined by the said butt-joining method as a tire structural member, and vulcanized the said green tire to make a vulcanized tire If the tire manufacturing method provided with the vulcanization process is used, a high performance tire can be manufactured easily.

  In this invention, the lower nails of each lower nail group are individually divided and supported so that the lower table can swing independently, while the upper nails of each upper nail group are individually divided and Since it is supported so that it can swing independently, if the processing accuracy of the lower and upper nails and the assembly accuracy with respect to the lower and upper bases are to a certain degree of accuracy, the lower and upper nails will surely mesh with each other and the front of the sheet-like material It is possible to make uniform contact with the upper surface under the rear end, and as a result, the manufacturing cost of the entire apparatus is reduced, and a high manufacturing technique is not required. Also, if any of the nails (lower and upper nails) is damaged, replace only the new nails with new ones. At this time, the difference based on wear, rattling, etc. with other nails should be replaced. Since the nail is absorbed by swinging independently, there is almost no variation in the bonding strength between the front and rear ends of the sheet-like material, and as a result, the nail replacement work becomes easy and the cost is low. Become.

  Further, when configured as described in claim 3, it is possible to reliably define the rising side limits of the lower and upper claws, whereby the upper ends of the lower claws and the lower ends of the upper claws can be easily set to the same height. Can be located. Furthermore, if comprised as claimed in claim 4, all the lower and upper claws can be energized synchronously with a simple structure, and the operation of these lower and upper claws is stabilized. Moreover, if comprised as described in Claim 5, the joining state of the front and rear ends in the joining portion of the sheet-like material becomes fine, and the joining distance becomes long, thereby improving the joining strength. At the same time, deformation of the lower and upper nails can be prevented.

It is a schematic front view which shows Embodiment 1 of this invention. It is a front view of the lower and upper nail group vicinity. It is a top view of a lower nail group vicinity. It is a partially broken perspective view of the front lower nail vicinity. FIG. 3 is a cross-sectional view taken along a line II in FIG. 2. FIG. 6 is a cross-sectional view similar to FIG. 5 for explaining a butt joining operation. It is a top view of the sheet-like material vicinity after butt joining. It is a partially broken front view which shows the side edge vicinity of the sheet-like material at the time of butt joining.

Embodiment 1 of the present invention will be described below with reference to the drawings.
In FIGS. 1, 2, 3, 4, and 5, 11 is a butt-joining apparatus for butt-joining the front and rear ends S1, S2 of the sheet-like material S cut to a predetermined length. Both the front end S1 and the rear end S2 are inclined at the same angle, for example, a right angle or a predetermined angle with respect to the front-rear direction. Here, the sheet-like material S is composed of a large number of reinforcing cords parallel to the front and rear ends S1 and S2 and a coating rubber covering the periphery of these reinforcing cords. Before and after, the rear ends S1 and S2 are butt-joined one after another to form a tire constituting member constituting a part of the pneumatic tire, for example, a carcass or belt-like member.

  The butt-joining device 11 has a horizontal strip-shaped fixing base 12 extending along the front and rear ends S1, S2 of the sheet-like material S, and the fixing base 12 has its widthwise center part at both widthwise side parts. A pair of arcuate grooves 14a and 14b extending in the longitudinal direction of the fixing base 12 are formed apart from each other in the width direction on the upper surface of the fixing base 12 in the width direction. 15a and b are a plurality of support blocks extending along the fixed base 12, and these support blocks 15a and 15b are about 100 mm in length, respectively, on the front side in the width direction and the rear side in the width direction of the fixed base 12. It is fixed. A plurality of front and rear brackets 18a and 18b each having an inverted L shape are attached to the support blocks 15a and 15b, respectively.

  These front and rear brackets 18a and 18b are arranged at equal distances from each other along the front and rear ends S1 and S2 of the sheet-like material S, and one between the two front brackets 18a. The rear brackets 18b are alternately arranged so as to be positioned. As a result, a gap having a constant width is formed between the adjacent front brackets 18a and between the adjacent rear brackets 18b. The fixed base 12, the support blocks 15a, b, the front and rear brackets 18a, b described above constitute a lower base 19 installed below the sheet-like material S as a whole.

  21a is a plurality of front lower claws each having a lower end inserted into a gap between adjacent front brackets 18a. The lower end of the front lower claws 21a and the bent portion of the front bracket 18a are connected to the fixed base 12. A pin 22a extending along the line is inserted. As a result, the plurality of front lower claws 21a are juxtaposed along the front and rear ends S1 and S2 of the sheet material S, and supported so as to be able to swing independently on the lower base 19 around the lower end portion. Will be. Further, these front lower claws 21a are inclined so as to go backward as they go upward. The plurality of front lower claws 21a described above as a whole are supported by the lower base 19 so that the lower end portion thereof is swingable. The lower front claws 21a are inclined toward the rear as they move upward, and the front, rear ends S1, A front lower nail group 23a extending along S2 is formed.

  Reference numeral 21b denotes a plurality of rear lower claws each having a lower end portion inserted in a gap between adjacent rear brackets 18b. The lower end portion of the rear lower claws 21b and the bent portion of the rear bracket 18b are connected to the fixed base 12. A pin 22b extending along the line is inserted. As a result, the plurality of rear lower claws 21b are juxtaposed along the front and rear ends S1 and S2 of the sheet-like material S and supported so as to be able to swing independently on the lower base 19 around the lower end portion thereof. Will be. The rear lower claws 21b are inclined so as to go forward as they go upward.

  The plurality of rear lower claws 21b described above are supported by the lower base 19 so that the lower end portion is swingable, and incline toward the front as they move upward, and the front, rear ends S1, A rear lower nail group 23b extending along S2 is formed. In this way, a pair of front and rear lower claw groups 23a and 23b that are inclined so as to approach each other as they move upward are supported on the lower base 19. The plurality of front and rear lower claws 21a and b constituting the pair of front and rear lower nail groups 23a and b are individually divided one by one as described above. As a result, the front and rear The lower claws 21a and 21b can swing independently about the pins 22a and 22b.

  Before and after each front and rear lower nail group 23a, b, the lower lower claws 21a, b can contact the rear end portion of the sheet-like material S and the lower surface of the front end portion at the upper end portions thereof, respectively. A plurality of narrow grooves extending in the longitudinal direction of the fixing base 12 are formed on the upper surfaces of the lower joint portions 25a and 25b. As a result, when the lower joint portions 25a and b come into contact with the lower surface of the front end portion after the sheet-like material S, the frictional resistance therebetween increases, and after the sheet-like material S, the front end portions are surely attracted to each other. It becomes.

  28a is a hollow front rubber tube which is interposed between all the front lower claws 21a constituting the front lower claw group 23a and the fixing base 12, more specifically, the arc-shaped groove 14a and closed at both ends. The tube 28 a extends in the longitudinal direction of the fixed base 12. 28b is a hollow rear rubber tube which is interposed between all the rear lower claws 21b constituting the rear lower claws group 23b and the fixing base 12, more specifically, the arc-shaped groove 14b and closed at both ends. The rear rubber tube 28 b extends in the longitudinal direction of the fixed base 12. In addition, a fluid of a predetermined pressure, for example, air is sealed in the front and rear rubber tubes 28a and b, and as a result, all the front and rear front nail groups 23a and b that constitute the pair of front and rear lower nail groups 23a and b, The rear lower claws 21a and 21b can receive a biasing force in the standing direction from the front and rear rubber tubes 28a and 28b, and can swing in the standing direction around the pins 22a and b.

  The aforementioned front and rear rubber tubes 28a and 28b as a whole constitute a lower urging member 29 for urging the pair of front and rear lower claw groups 23a and b in the standing direction. Here, if the lower urging member 29 is constituted by the hollow front and rear rubber tubes 28a and 28b as described above, all the front and rear lower claws 21a and 21b are synchronized in the standing direction with a simple structure. As a result, the swinging motions of the front and rear lower claws 21a and 21b are stabilized. In the present invention, the same number of the lower urging members as the front and rear lower claws 21a and 21b, and the compression coil spring or the torsion coil for urging the front and rear lower claws 21a and b in the standing direction You may make it comprise from a spring.

  The lower base 19 has stopper surfaces 31a and 31b as stopper portions on the upper surfaces of the support blocks 15a and 15b between the adjacent front brackets 18a and between the rear brackets 18b, respectively. b, when the front and rear lower claws 23a, b and the rear lower claws 21a, b are swung to the standing limit by the lower urging member 29 (front, rear rubber tubes 28a, b). Before the front and rear lower claws 23a, b are formed, the contact surfaces 32a, b formed at the lower ends of the rear lower claws 21a, b come into contact with each other. Prevent overswing in the standing direction.

  Thus, when the front and rear lower claws 23a and b are swung to the standing limit by the lower urging member 29, before and after the front and rear lower claws 23a and b are formed, If the lower base 19 is provided with the stopper surfaces 31a, b with which the lower end portions (contact surfaces 32a, b) of the b abut, the rising side limits of the front and rear lower claws 21a, b should be specified reliably. Accordingly, the upper ends of the front and rear lower claws 21a and 21b can be easily positioned at the same height.

  In the present invention, the stopper portion is composed of set screws screwed into the support blocks 15a, b between the adjacent front brackets 18a and between the rear brackets 18b, and by adjusting the screwing amount of the set screws, The standing side limits of the front and rear lower claws 21a, b may be adjustable. Moreover, in this invention, you may form a stopper part in a front and back bracket.

  35 is an upper frame that is installed directly above the lower base 19 and extends in parallel to the lower base 19. A plurality of guide blocks 36 that are separated in the longitudinal direction of the upper frame 35 are attached to the upper frame 35. ing. Reference numeral 37 denotes a guide rod extending in the vertical direction and inserted into each guide block 36 so as to be movable up and down. At the lower end of these guide rods 37, a strip plate-like shape is positioned parallel to the fixed base 12 and directly above the fixed base 12. A movable base 38 is connected, and the movable base 38 is configured such that the central portion in the width direction is thicker than both side portions in the width direction, and the longitudinal direction of the movable base 38 is arranged on the lower surface of the central portion in the width direction of the movable base 38. A pair of arc-shaped grooves 41a and 41b extending in the width direction are formed apart in the width direction. Reference numerals 40a and 40b denote a plurality of support blocks extending along the movable table 38. These support blocks 40a and 40b have a length of about 100 mm and are respectively provided on the front side in the width direction and the rear side in the width direction of the movable table 38. It is fixed. A plurality of front and rear brackets 42a, 42b each having an inverted L shape are attached to the support blocks 40a, 40b.

  The front and rear brackets 42a and 42b are arranged at equal distances from each other along the front and rear ends S1 and S2 of the sheet-like material S, and one front bracket 42a is adjacent to each other. The rear brackets 42b are alternately arranged so as to be positioned. As a result, a gap having the same width as described above is formed between the adjacent front brackets 42a and between the adjacent rear brackets 42b. The movable table 38, the support blocks 40a and 40b, and the front and rear brackets 42a and 42b as a whole constitute an upper table 43 installed above the lower table 19 and the sheet-like material S.

  45a is a plurality of front upper claws, each having an upper end inserted in a gap between adjacent front brackets 42a, and arranged directly above the front lower claws 21a. The upper upper claws 45a and the front A pin 46a extending along the movable base 38 is inserted into the bent portion of the bracket 42a. As a result, the plurality of front upper claws 45a are juxtaposed along the front and rear ends S1, S2 of the sheet-like material S, and supported so as to be able to swing independently on the upper base 43 with the upper end portion as the center. Will be. Further, these front upper claws 45a are inclined so as to go backward as they go downward. The plurality of front upper claws 45a as a whole are supported by the upper base 43 so that the upper end portion thereof is swingable. The upper upper claws 45a are inclined to the rear as they move downward, and the front and rear ends S1, S2 of the sheet-like material S are also inclined. A front upper nail group 47a extending along the line.

  Reference numerals 45b denote a plurality of rear upper claws, each having an upper end inserted in a gap between the adjacent rear brackets 42b, and respectively disposed immediately above the rear lower claws 21b. The upper ends of the rear upper claws 45b and the rear A pin 46b extending along the upper movable base 38 is inserted into the bent portion of the bracket 42b. As a result, the plurality of rear upper claws 45b are juxtaposed along the front and rear ends S1, S2 of the sheet-like material S, and supported so as to be able to swing independently on the upper base 43 around the upper end portion. Will be. Further, these rear upper claws 45b are inclined so as to go forward as they go downward.

  The plurality of rear upper claws 45b described above are supported by the upper base 43 so as to be swingable as a whole, and incline toward the front toward the lower side, and at the front and rear ends S1, S2 of the sheet-like material S. A rear upper nail group 47b extending along the line is formed. Thus, a pair of front and rear upper claw groups 47a, 47b that are inclined so as to approach each other as they go downward are supported on the upper base 43. The plurality of front and rear upper claws 45a and 45b constituting the pair of front and rear upper nail groups 47a and 47b are individually divided one by one as described above. As a result, the front and rear The upper claws 45a, b can swing independently about the pins 46a, 46b.

  In this way, the front and rear lower claws 23a, b in front and rear lower claws 21a, b are individually divided and supported by the lower base 19 so as to be able to swing independently. Since the front and rear upper claws 45a and 45b are individually divided and supported by the upper base 43 so as to be able to swing independently, the front and rear lower claws 21a and 21b and the front and rear upper If the processing accuracy of the claws 45a, b and the assembly accuracy with respect to the lower base 19 and the upper base 43 are a certain degree of accuracy, the front, rear lower claws 21a, b, front, rear upper claws 45a, b are surely The sheet-like material S can be meshed with each other and can be in uniform contact with the front, under the rear end portion, and the upper surface of the sheet-like material S. As a result, the manufacturing cost of the entire apparatus is reduced, and high manufacturing techniques are not required.

  In addition, when any of the front, rear, lower and upper claws 21a, b, 45a, b described above is damaged, only the claws are replaced with new ones. Differences based on wear and backlash with the nail are absorbed by the single swing of the replaced nail, so there is almost no variation in the bonding strength between the front and rear ends S1 and S2 of the sheet material S. As a result, the replacement operation of the nail becomes easy and the cost is also low. Before each of the front and rear upper claws 47a, b described above, the rear upper claws 45a, b can come into contact with the lower end of the rear end portion of the sheet material S and the upper surface of the front end portion, respectively. There are joint portions 49a and 49b, and a plurality of narrow grooves are formed on the lower surfaces of these upper joint portions 49a and 49b, like the front and rear lower claws 21a and 21b.

  51a is a hollow front rubber tube which is interposed between all the front upper claws 45a constituting the front upper claw group 47a and the movable base 38, more specifically, the arc-shaped groove 41a and closed at both ends. The tube 51 a extends in the longitudinal direction of the movable table 38. 51b is a hollow rear rubber tube which is interposed between all the rear upper claws 45b constituting the rear upper claw group 47b and the movable base 38, more specifically, the arcuate shape 41b and closed at both ends. The side rubber tube 51b extends in the longitudinal direction of the movable table 38. And, the fluid of a predetermined pressure, for example, air is sealed in these front and rear rubber tubes 51a and b, and as a result, all the fronts constituting the pair of front and rear upper claws 47a and b, The rear upper claws 45a, b can receive a biasing force in the standing direction from the front and rear rubber tubes 51a, b, and can swing in synchronization with the pins 46a, b in the standing direction. The aforementioned front and rear rubber tubes 51a and 51b as a whole constitute an upper urging member 52 that urges the pair of front and rear upper claw groups 47a and 47b in the standing direction.

  Here, as described above, if the upper urging member 52 is constituted by the hollow front and rear rubber tubes 51a and 51b in the same manner as the front and rear rubber tubes 28a and 28b, all the front and rear can be formed with a simple structure. The upper claws 45a, b can be energized synchronously, and as a result, the swinging motion of the front and rear upper claws 45a, b is stabilized. In the present invention, a compression coil spring or a torsion coil spring may be used as the upper biasing member as described above.

  Further, the upper base 43 has stopper surfaces 54a, b as stopper portions on the lower surfaces of the support blocks 40a, b between the adjacent front brackets 42a and between the rear brackets 42b, respectively, and these stopper surfaces 54a, b The upper biasing member 52 (front, rear rubber tubes 51a, b) causes the front, rear upper claws 47a, b in front and rear upper claws 45a, 45b to swing to the standing side limit, Before the front and rear upper claws 47a and b are formed, the contact surfaces 55a and 55b formed at the upper ends of the rear upper claws 45a and b come into contact, and the front and rear upper claws 45a and b are raised. Prevent over-swaying in the direction.

  Thus, when the front and rear upper claws 47a and b are swung to the standing limit by the upper urging member 52, before and after forming the front and rear upper claws 47a and b, the rear upper claws 45a, If the stopper surfaces 54a, b with which the upper end portions (contact surfaces 55a, b) of the b abut are provided on the upper base 43, the rising side limits of the front and rear upper claws 45a, b can be ensured in the same manner as described above. Accordingly, the lower ends of the front and rear upper claws 45a and 45b can be easily positioned at the same height. In the present invention, the stopper portion may be formed of a set screw as described above, and the stopper portion may be formed on the front and rear brackets.

  Moreover, it is preferable to manufacture the front and rear lower claws 21a and b and the front and rear upper claws 45a and b described above by, for example, a casting method such as a lost wax method. The reason is that if it is manufactured by a casting method, it is inexpensive and can be easily mass-produced, and the surface can be hardened simultaneously with the manufacture. Furthermore, as compared with the case of manufacturing by cutting or grinding, moderate chamfering is applied to the edge portion at the time of manufacturing, and the situation where the rubber of the sheet-like material S is peeled off or the reinforcing cord is damaged can be prevented.

  Reference numeral 58 denotes a plurality of defining pins that penetrate the center of the fixing base 12 in the width direction. These defining pins 58 extend in the vertical direction and are arranged equidistantly in the longitudinal direction of the fixing base 12. When the regulation pins 58 are raised by a driving mechanism (not shown), the upper end portion appears in front of the sheet-like material S and between the rear ends S1, S2. Then, evacuate and retract downward from between the rear ends S1 and S2. Further, when the front and rear ends S1 and S2 of the sheet-like material S come into contact with the predetermined pins 58 when the front and rear ends S1 and S2 of the sheet-like material S appear, The distance between the front and rear ends S1 and S2 of the sheet-like material S is defined to be substantially constant at any position, and the front and rear ends S1 and S2 are substantially parallel.

  61 is a motor installed on the upper surface of the upper frame 35. The output shaft 62 of the motor 61 has a proximal end portion of the turning arm 63 fixed thereto, and a transmission pin 64 supported by the distal end portion of the turning arm 63 is The upper end portion of the transmission link 65 is rotatably connected. Further, the lower end of the transmission link 65 is connected to the upper base 43 (movable base 38). As a result, when the motor 61 is operated and the turning arm 63 turns, the upper base 43, front, rear upper The claw groups 47a and 47b move up and down together while being guided by the guide block 36 and the guide rod 37, and approach and separate from the lower base 19, front and rear lower claw groups 23a and b. The motor 61, the turning arm 63, the transmission pin 64, and the transmission link 65 described above constitute contact / separation means 66 that moves the upper base 43 relatively close to and away from the lower base 19. In the present invention, the lower table 19 and the upper table 43 are moved by moving the lower table 19 up and down, or by moving both the lower table 19 and the upper table 43 up and down while the upper table 43 is stationary. May be relatively approached and separated. In the present invention, a cylinder, a screw mechanism or the like may be used as the contact / separation means.

Next, the operation of the first embodiment will be described.
When the front and rear ends S1 and S2 of the sheet-like material S are butt-joined using the butt-joining apparatus 11 as described above, first, the sheet-like material S located on the rear side of the regulation pin 58 is illustrated. On the other hand, the sheet-like material S positioned on the front side of the regulation pin 58 is conveyed rearward on the conveyor not shown, and the front end S1 of the rear-side sheet-like material S is defined. The rear end S2 of the sheet material S on the front side is brought into contact with the pin 58 with a predetermined force, respectively.

  At this time, since the defining pin 58 having the same diameter is interposed between the front and rear ends S1 and S2 of the sheet-like material S located on the rear side and the front side, the distance between them is almost equal at any position. They are constant and they are substantially parallel. Further, at this time, the lower joint portion 25a of the front lower claw 21a swinging to the standing side limit is in contact with the lower surface of the rear end portion of the sheet-like material S located on the front side, and is located on the rear side. The lower joint portion 25b of the rear lower claw 21b that swings to the standing side limit contacts the lower surface of the front end portion of the sheet-like material S.

  Next, when the motor 61 is actuated to turn the swing arm 63, the upper base 43, front and rear upper claw groups 47a, b are lowered integrally, and the lower base 19, front, rear lower claw group are lowered. Approaches 23a and b. At this time, the regulation pin 58 descends and retracts downward from between the front and rear ends S1, S2 of the sheet material S. Then, the upper joint portion 49a of the front upper claw 45a swinging to the standing side limit contacts the upper surface of the rear end portion of the sheet-like material S located on the front side and swings to the standing side limit. When the upper joint portion 49b of the upper claw 45b contacts the upper surface of the front end portion of the sheet-like material S located on the rear side, the upper and lower surfaces of the rear end portion of the sheet-like material S located on the front side are the front upper claw group 47a. The front upper claw 45a and the front lower claw 21a of the front lower claw group 23a are in contact with each other and are sandwiched from above and below by the front upper and lower claws 45a and 21a, and the front end of the sheet-like material S located on the rear side The upper and lower surfaces of the part are in contact with the rear upper claw 45b of the rear upper claw group 47b and the rear lower claw 21b of the rear lower claw group 23b, and are respectively sandwiched from above and below by the upper and lower claws 45b and 21b. Is done.

  In this way, the rear end portion of the sheet-like material S positioned on the front side is sandwiched from above and below by the front upper and lower claws 45a and 21a, and the front end portion of the sheet-like material S located on the rear side is rear-upper and lower When the upper base 43 is moved downward by the motor 61 and the lower bases 43 and 19 are brought close to each other even after being sandwiched from above and below by the claws 45b and 21b, the front and rear lower claws 23a , B, front lower rear claws 21a, b and front, rear upper claws 47a, b front and rear upper claws 45a, b are front and rear rubbers centered on pins 22a, b and pins 46a, b, respectively. The tubes 28a, b and the front and rear rubber tubes 51a, b swing together in the tilting direction against the air pressure.

  At this time, the front and rear upper nail groups 47a and b (front and rear upper claws 45a and b) and the front and rear lower nail groups 23a and b (front and rear lower claws 21a and b) are respectively downward and upward. Since they are inclined so as to approach each other as they move toward, the upper joint portions 49a, b of the front and rear upper claws 45a, b and the front, rear lower claws 21a, b when they swing in the tilting direction as described above. The lower joint portions 25a and 25b come close to each other with the front end portion sandwiched between the sheet-like material S and bring the front and rear ends S1 and S2 of the sheet-like material S into contact with each other. Since the front and rear upper claws 45a and 45b and the front and rear lower claws 21a and 21b are further swung in the tilting direction even after the front and rear ends S1 and S2 of the sheet-like material S are in contact with each other. As shown in FIG. 6, the lower joint portions 25a and 25b penetrate each other, and the upper joint portions 49a and b also penetrate each other. As a result, the front and rear ends S1 and S2 of the sheet-like material S are strongly pressed and butt-joined, and the joint surface P between the front and rear ends S1 and S2 has a substantially rectangular wave shape as shown in FIG. Become.

  Here, in the conventional butt-joining apparatus described in the background art, the front, the rear lower nails, the rear lower nails and the front, the rear upper nails are formed, and the rear upper nails are formed. Usually, about 5 to 10 pieces per 10 cm are arranged along the front and rear ends S1 and S2 of the sheet-like material S. In this embodiment, the front and rear lower nails 21a and 21b and the front and rear upper nails are arranged. 45a and b are arranged only 13 to 25 per 10 cm (each claw width is narrowed to about 2 to 4 mm). By doing this, the front and rear ends S1, S2 of the joining surface P of the sheet-like material S become finer (rectangular wave pitch), and the number of joining surfaces P1 extending in the front-rear direction increases. As a result, the joint distance between the front and rear ends S1 and S2 becomes longer as a whole, the joint strength is improved, and deformation of the front and rear lower claws 21a and 21b and the front and rear upper claws 45a and 45b is prevented. be able to.

  In addition, when a conventional butt joining device is used for the butt joint as described above, the lower and upper nail blocks are fixed to each other at the outer ends due to backlash between the fixed and lift platform when the sheet material is butt joined. However, the upper nail block has a large contact pressure from the upper nail block to the side edge of the sheet-like material. The applied contact pressure becomes low, and as a result, the bonding strength may vary.

  Furthermore, when a large contact pressure is applied to the side edge of the sheet-like material as described above, the surface rubber of the sheet-like material at the part may be peeled off by the lower and upper nails, and as described above. When the upper and lower nail blocks are inclined under the outermost side, the lower and upper nails located at the outer ends of the lower and upper nail blocks are worn by abrasion. As a result, the backlash at the upper nail block under the outermost side becomes large, and the contact pressure to the sheet-like material becomes non-uniform, which causes a larger variation in the bonding strength between the front and rear ends of the sheet-like material. May end up.

  However, in this embodiment, the front and rear lower claws 21a and 21b and the front and rear upper claws 45a and b located on the inner side of the side end Q of the sheet-like material S individually swing independently. As shown in the figure, when the sheet-like material S is butt-joined, the lower and upper biasing members 29 and 52 are urged to contact the sheet-like material S with a uniform contact pressure. The front, rear lower claws 21a, b and the front and rear upper claws 45a, b swing individually independently, so that the front, rear lower claws 21a, b and the front are located inside the side end Q, They only touch each other without affecting the rear upper claws 45a and 45b.

  As a result, the contact pressure applied to the sheet-like material S from the front and rear lower claws 21a and 21b and the front and rear upper claws 45a and 45b is uniform throughout the entire area, and variation in bonding strength is suppressed. The removal of the surface rubber of the sheet material S by the lower claws 21a, b and the front and rear upper claws 45a, b is also strongly suppressed. Further, since the front and rear lower claws 21a and 21b and the front and rear upper claws 45a and b located on the outer side of the side end Q are in contact with each other on a wide surface, there is almost no abrasion due to abrasion, thereby Variation in bonding strength in the material S can also be effectively suppressed.

  Thereafter, the above-described operations are repeatedly performed, and the sheet-like material S is butt-jointed one after another to form a tire constituent member, for example, a carcass or belt-like member. Next, the belt-like member (tire constituent member) is cut into a predetermined length, the cut belt-like member is supplied to a molding drum together with other tire constituent members and wound, and the belt-like member ( A green tire using a tire constituent member) is molded. Thereafter, the green tire is housed in a vulcanization mold and vulcanized to obtain a vulcanized tire. In this way, high-performance tires can be easily manufactured.

  The present invention can be applied to the industrial field in which the front and rear ends of a sheet-like material are butt-joined.

11 ... Butt joining device 19 ... Lower stand
21a, b ... lower nails 23a, b ... lower nails
25a, b ... Lower joint part 28a, b ... Rubber tube
29 ... Lower urging member 31a, b ... Stopper part
43 ... Lower stand 45a, b ... Upper nail
47a, b ... Upper nail group 49a, b ... Upper joint
51a, b ... Rubber tube 52 ... Upper biasing member
54a, b ... stopper part S ... sheet-like material
S1 ... Front end S2 ... Rear end

Claims (6)

    The front and rear ends of the lower base installed below the sheet-like material inclined at the same angle with respect to the front-rear direction, and the lower base are swingably supported by the lower base and approach each other as they move upward. And a pair of lower claw groups extending along the front and rear ends of the sheet-like material, a lower urging member for urging the pair of lower claw groups in the upright direction, and the sheet-like material. The upper base that can be moved closer to and away from the lower base, and the upper end of the upper base are swingably supported, and are inclined so as to approach each other toward the lower side, at the front and rear ends of the sheet-like material. A pair of upper claw groups extending along the upper urging member for urging the pair of upper claw groups in a standing direction, and each lower claw group has a front surface of the sheet-like material at the upper end portion and a lower surface of the rear end portion Lower joints that can contact each other are provided, and are arranged side by side along the front and rear edges of the sheet-like material. On the other hand, each upper nail group is provided with an upper joint portion that can contact the front surface of the sheet-like material and the upper surface of the rear end portion at the lower end portion, respectively, and the front and rear ends of the sheet-like material. Preparation process for preparing a butt-joining device having a plurality of upper claws arranged side by side, and upper joining of the lower joint group and the upper nail group on the lower surface and upper surface of the front and rear ends of the sheet-like material The parts are brought into contact with each other so that the front end and the rear end of the sheet-like material are sandwiched from above and below by the upper and lower nails, respectively, and the lower and upper bases are relatively close to each other. The lower claws of each lower nail group are individually swung in the tilting direction against the lower biasing member, and the upper nails of each upper nail group separately tilted in the tilting direction against the upper biasing member The front and rear ends of the sheet material are butted together by rocking independently Butt joining method for sheet material characterized in that a bonding step of bonding.     The front and rear ends of the lower base installed below the sheet-like material inclined at the same angle with respect to the front-rear direction, and the lower base are swingably supported by the lower base and approach each other as they move upward. And a pair of lower claw groups extending along the front and rear ends of the sheet-like material, a lower urging member for urging the pair of lower claw groups in the upright direction, and the sheet-like material. The upper base that can be moved closer to and away from the lower base, and the upper end of the upper base are swingably supported, and are inclined so as to approach each other toward the lower side, at the front and rear ends of the sheet-like material. A pair of upper claw groups extending along the upper urging member for urging the pair of upper claw groups in a standing direction, and each lower claw group has a front surface of the sheet-like material at the upper end portion and a lower surface of the rear end portion Lower joints that can contact each other are provided, and are arranged side by side along the front and rear edges of the sheet-like material. On the other hand, each upper nail group is provided with an upper joint portion that can contact the front surface of the sheet-like material and the upper surface of the rear end portion at the lower end portion, respectively, and the front and rear ends of the sheet-like material. A plurality of upper claws arranged side by side, and contacting the lower joint portion of the lower nail group and the upper joint portion of the upper nail group to the front, rear end lower surface and upper surface of the sheet-like material, After holding the front and rear ends of the sheet-like material from above and below with the upper and lower nails, the lower nails and the upper nails of the upper nails are Lower and lower nails of each lower nail group in a sheet-like material butt-joining apparatus that oscillates in a tilting direction against the upper and lower urging members and butt-joins the front and rear ends of the sheet-like material Each of the upper claws is divided into individual parts and supported by the lower base so that it can swing independently. With split individually nail over the butt joint of a sheet material characterized in that is supported so that it can swing independently to the upper platform.     When the lower claw group is swung to the upright side limit by the lower urging member, a stopper portion is provided on the lower base that contacts the lower end of the lower claw constituting the lower claw group, and the upper claw group is attached to the upper claw group. The butt-joining device for sheet-like material according to claim 2, wherein a stopper portion with which the upper end of the upper claw constituting the upper claw group comes into contact is provided on the upper base when the urging member swings to the standing side limit.     The sheet-like material butt-joining apparatus according to claim 2 or 3, wherein the lower and upper urging members are constituted by hollow rubber tubes.     The lower nail constituting the lower nail group and the upper nail constituting the upper nail group are arranged only 13 to 25 per 10 cm along the front and rear ends of the sheet material, respectively. A butt joining apparatus for sheet-like materials according to claim 1.     A molding step of molding a green tire using a sheet-like material whose front and rear ends are butted and joined by the butt joining method according to claim 1 as a tire constituent member, and vulcanizing and vulcanizing the green tire A tire manufacturing method comprising a vulcanization step for forming a finished tire.

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