JP2003127249A - Method and device for bonding filler to bead core - Google Patents

Abstract

PROBLEM TO BE SOLVED: To upgrade the uniformity of a finished product tire by restraining an increase in the wall thickness, at a joint, of a filler. SOLUTION: The forward end 40a and the rear end 40b of a band-like filler are made to show a mutually different cut shape and in this case, are shaped like a straight line and recessed like V respectively. Consequently, the lap, at a joint, of the forward end and the rear end of a band-like filler 40 gradually increases toward the outermost end of the width direction. Thus the lap, at the tip parts, of a thin-walled filler 39 increases, so that even when the base end parts of a thick-walled filler 39 are made to assume an approximate state to when the base end parts of the thick-walled filler 39 are butt-joined together, it is possible to maintain the sufficient joint strength of the filler 39.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sticking method and device for sticking a filler around a bead core to produce a bead with a filler which is an intermediate member of a pneumatic tire.

[0002]

2. Description of the Related Art As a conventional method / apparatus for attaching a filler to a bead core, there is known one disclosed in, for example, JP-A-8-142227 proposed by the present applicant.

[0003] In this product, first, two bead cores arranged in parallel on the same axis are integrally connected to each other at their proximal ends, and two fillers each having a substantially triangular cross section are thinned toward the tip. The flat band-shaped filler consisting of is supplied by the supply means, and the base end of each filler is pressed against the outer peripheral surface of the corresponding bead core by the pressing means.

Next, while rotating the bead core around the axis by the rotating means, the band-shaped filler is supplied to the bead core by the supplying means, and the band-shaped filler is wound around the bead core while being temporarily attached. When the band-shaped filler is wound around most of the bead core, the band-shaped filler is cut into a length substantially equal to one circumference of the bead core by the cutter of the cutting means.

Then, the belt-shaped filler is supplied to the bead core while rotating the bead core, thereby winding the remaining portion of the cut filler around the bead core, and then joining means for joining the start end and the end of the belt-shaped filler. And the band-shaped filler is molded into a cylindrical shape. Then, while rotating the bead core by the rotating means, by pressing the widthwise central portion of the band-shaped filler against the bead core by the affixing means, the base end face of the filler is affixed to the outer peripheral surface of the corresponding bead core, and each filler is radiused. I was trying to stand up toward the outside of the direction.

[0006] In this way, by joining the beginning and the end of the band-shaped filler into a cylindrical shape, and pressing the widthwise central part of the band-shaped filler against the bead core, the respective fillers are attached to the bead core and radially outwardly. If it is made to stand up toward each other, at the time of rising of each filler, a large circumferential length difference occurs between the inner peripheral portion and the outer peripheral portion of the filler and between the proximal end portion and the distal end portion, and at the beginning, Peeling may occur at the joint between the end portions.

For this reason, in the past, the start and the end of the filler are joined in a state in which they are superposed by a certain amount regardless of the position in the width direction, and the above-mentioned peeling at the joined portion is suppressed. It was

[0008]

However, when such lap joining is performed, the wall thickness at the joint portion, especially at the base end portion of the filler becomes large, and as a result, the uniformity of the product tire is deteriorated. There is a problem that it ends up.

An object of the present invention is to provide a method and an apparatus for sticking a filler to a bead core, which can improve the uniformity of a product tire by suppressing an increase in the wall thickness at the joint of the filler.

[0010]

[Means for Solving the Problems]
In addition, to the two bead cores arranged in parallel on the same axis, the adjacent base ends are integrally connected to each other, and a band-shaped filler composed of two fillers having a substantially triangular cross-section that becomes thinner toward the tip is supplied. , A step of crimping the base end to the outer peripheral surface of the bead core at the start end of each filler, and winding the band-shaped filler around the bead core while rotating the bead core around the axis, and the widthwise center of the wound band-shaped filler. By pressing the part to the bead core, while sticking the base end face of the filler to the outer peripheral surface of the corresponding bead core, respectively, the step of raising each filler toward the outside in the radial direction, and the filler was attached to most of each bead core. At this time, a step of cutting the strip-shaped filler into a length substantially equal to one circumference of the bead core with a cutter, and the cut filler While sticking the remaining part of the periphery of the bead core, and a step of joining the starting end and the terminal end of the band-shaped filler, after cutting the band-shaped filler, while sending a little amount of the band-shaped filler and cutting the band-shaped filler again The cutting form is made different between the first cutting and the second cutting, and the overlapping amount of the beginning and the end of the band-shaped filler in the joint is gradually increased from the widthwise center of the band-shaped filler toward the widthwise outer side. By the method of attaching the filler to the bead core,

Secondly, the rotating means for synchronously rotating two coaxial bead cores arranged in parallel about the axis and the adjacent base ends are integrally connected to each other, and the cross-sectional shape is thinned toward the tip. Supply means for supplying a strip-shaped filler composed of two triangular fillers to the bead core, crimping means for crimping the base end to the outer peripheral surface of the bead core at the start end portion of each filler supplied to the bead core, and the start end portion. After crimping, by pressing the widthwise central portion of the band-shaped filler that is supplied to the bead core that is rotating in synchronization and wrapped around the bead core, while sticking the base end face of the filler to the outer peripheral face of the corresponding bead core, A sticking means for raising each filler toward the outer side in the radial direction, and a strip-shaped filler when the filler is stuck on most of each bead core. When the cutting means having a cutter for cutting the bead core to a length substantially equal to one circumference and the remaining portion of the filler cut out by the cutting means are attached to the periphery of the bead core by rotation of the bead core, the start end portion and the end portion of the band-shaped filler are formed. And a cutting means for cutting the strip-shaped filler, feeding the strip-shaped filler in a small amount by the supply means and cutting the strip-shaped filler by the cutting means again, and cutting the strip-shaped filler by the first cutting and the second cutting. It is possible to achieve by a device for sticking a filler to a bead core in which the overlapping amount of the beginning and the end of the band-shaped filler at the joint is gradually increased as the width of the band-shaped filler goes from the widthwise center to the widthwise outside. it can.

According to the first aspect of the present invention, after the band-shaped filler is cut, the band-shaped filler is slightly fed by the supplying means and the band-shaped filler is cut again by the cutting means, and the first cutting and the second cutting are performed. Since the cutting shape is changed by and, the overlapping amount of the beginning and the end of the band-shaped filler in the joint is gradually increased from the widthwise center of the band-shaped filler toward the widthwise outer side. The amount of overlap in the portion can be increased, and as a result, even if the base end portion of the thick filler is similar to butt joint, the joint strength of the filler can be sufficiently maintained. As a result, it is possible to strongly suppress an increase in wall thickness at the joint portion, particularly at the base end portion of the filler, and improve the uniformity of the product tire. Then, such an action can be easily obtained by using the device according to the seventh aspect.

Further, according to the second aspect, the tip side of the filler is not largely deformed in the radial direction at the time of joining and after the joining.
A large circumferential length difference does not occur between the inner and outer peripheral parts of the filler and between the base end part and the front end part, and the amount of overlap at the time of joining the filler start and end parts Can be significantly reduced. This allows
It is possible to suppress an increase in wall thickness at the joint portion, particularly at the base end portion of the filler, and improve the uniformity of the product tire.

According to the third aspect of the invention, the work efficiency is improved as compared with the case where the strip-shaped filler is wound around the entire circumference of the bead core and then pasted on the outer peripheral surface thereof. Further, the action as described in claim 1 is
It can be easily obtained by using the method according to claim 4 or 5. Further, according to the sixth aspect, it is possible to improve the bonding state between the beginning and the end of the band-shaped filler.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 1 and 2, 11 is a main frame extending in the vertical direction.
Three drive rollers 13 are rotatably supported at the center of the height direction 11 and are arranged on an arc having a diameter substantially the same as that of the bead core 12 and spaced apart in the circumferential direction. Pulleys 14 are fixed to the shafts of these drive rollers 13, and a timing belt 15 is stretched around these pulleys 14. Reference numeral 16 is a motor with a reducer attached to the main frame 11, and between the pulley 17 fixed to the output shaft of this motor 16 and the pulley 18 fixed to the shaft portion of one of the drive rollers 13. Timing belt 19 is hung around. As a result, when the motor 16 operates, the drive roller 13 synchronously rotates in the same direction (counterclockwise in FIG. 1) at a constant speed.

1, 2 and 3, each drive roller 13 has an annular groove 21 on the outer periphery of the central portion in the axial direction.
The width of the bead core 12 having a square cross section is substantially 2
The depth is deeper than the thickness of the bead core 12. Then, a part of the two bead cores 12 arranged in parallel is inserted into the annular groove 21 of these drive rollers 13, and these bead cores 12 are supported from the inner periphery while maintaining the coaxial relationship.

A central portion of a swing arm 22 is rotatably supported on the main frame 11 below the drive roller 13,
At the tip of the swing arm 22, a squeezing roller 23 positioned directly below the drive roller 13 is rotatably supported. The curling roller 23 has a cylindrical receiving portion 23a having a width equal to the width of the annular groove 21 in the central portion in the axial direction, and a tapered taper toward the receiving portion 23a on both sides of the receiving portion 23a. Each of the curving portions 23b having the shape of a head cone is provided. Here, these squeezing portions 23b are inclined at substantially the same angle as a predetermined rising angle G when the filler to be described later is supplied to the tire building drum. The bead core 12 is provided between the receiving portion 23a and the squeezing portion 23b.
Is formed with a step surface 23c having substantially the same thickness and height.

Reference numeral 25 denotes an oscillating cylinder whose head side is connected to the main frame 11 below the oscillating arm 22, and the tip of the piston rod 26 of the oscillating cylinder 25 is connected to the base end of the oscillating arm 22. ing. As a result, when the oscillating cylinder 25 operates and the piston rod 26 projects, the oscillating arm 22 oscillates so that the eccentric roller 23 approaches the inner circumference of the lower portion of the bead core 12. And the squeeze roller
When the inner periphery of the bead core 12 is pressed against the receiving portion 23a of 23, the squeeze roller 23 cooperates with the drive roller 13 to hold the bead core 12 in the upright state. When driven and rotated by, the rotation of the drive roller 13 is transmitted to the bead core 12, and the two bead cores 12 are synchronized with each other in the same direction (counterclockwise in FIG. 1).
Rotate at a constant speed.

The drive roller 13, the pulley 14, the timing belt 15, the motor 16, the pulleys 17 and 18, the timing belt 19, the swing arm 22, the straightening roller 23, and the swing cylinder 25 described above are arranged in parallel as a whole. The rotating means 27 is configured to synchronously rotate the two coaxial bead cores 12 around the axis.

Reference numeral 29 denotes a sub-frame that extends in the vertical direction on the right side of the main frame 11, and both ends of a lower horizontal frame 30 that extends in the left-right direction are provided in the central portion of the sub-frame 29 and the central portion of the main frame 11. Is fixed. A pair of guide rods 31 extending along the lower horizontal frame 30 are attached to the lower horizontal frame 30, and a slider 32 is supported on the guide rods 31 so as to be movable in the left-right direction. A plurality of guide rollers 33 parallel to the driving roller 13 are rotatably supported on the upper end of the slider 32 so as to be separated from each other in the left-right direction. A drive roller 34 extending in parallel with the guide roller 33 is rotatably supported on the upper end of the slider 32, and the drive roller 34 is driven and rotated by a motor (not shown).

Reference numeral 35 is a cylinder attached to the lower horizontal frame 30 and extending in the left-right direction. The tip of the piston rod 36 of this cylinder 35 is connected to the slider 32. As a result, when the cylinder 35 operates and the piston rod 36 projects or retracts, the slider 32 moves toward and away from the upper end of the bead core 12 supported by the rotating means 27 while being guided by the guide rod 31. The above-mentioned guide rod 31, slider 32, guide roller 33, drive roller 3
4, the cylinder 35 constitutes the supply means 37 as a whole.

On the guide roller 33 and the driving roller 34 described above, a band-shaped filler 40 composed of two fillers 39 respectively attached to the bead core 12 is supported. The band-shaped filler 40 is an extruder or an unwinder not shown. Supplied from Here, each filler 39 has a substantially triangular cross-section that becomes thinner from the base end toward the tip,
The strip-shaped filler 40 is configured by integrally connecting these adjacent base ends to each other.

The slider 32 described above is attached to the cylinder 35.
When the bead core 12 is moved closer to the bead core 12 by the operation of, the driving roller 34 of the supply means 37 is driven to rotate and the two bead cores 12 are synchronously rotated by the rotation means 27. Are supplied to the outer peripheral surface of the upper end portion of the bead core 12 and are successively wound around the periphery thereof.

Main frame 11 above drive roller 13
A cylinder 42 extending toward the rotation axis of the bead core 12 supported by the rotating means 27 is attached to the end of the piston rod 43 of the cylinder 42 on the outer peripheral surface of the upper end portion of the bead core 12 by the supplying means 37. Crimping member for pressing the starting end portion of the supplied band-shaped filler 40 against the bead core 12.
44 are provided. Then, the base end edge of the starting end portion of the band-shaped filler 40 (filler 39) pressed against the bead core 12 by the crimping member 44 is crimped to the outer peripheral surface of the bead core 12. The cylinder 42 and the crimping member 44 described above as a whole constitute a crimping means 45 for crimping the base end of each filler 39 supplied to the bead core 12 to the outer peripheral surface of the bead core 12.

A cylinder 47 extending vertically is attached to the main frame 11 immediately above the drive roller 13 to the left of the crimping means 45, that is, in front of the bead core 12 in the rotational direction.
A U-shaped bracket 49 is connected to the tip of a piston rod 48 of the cylinder 47. This bracket 49
A disc-shaped sticking roller 50 rotatable around an axis parallel to the drive roller 13 is supported by the sticking roller 50, and the outer peripheral surface of the sticking roller 50 has a wedge shape whose diameter increases toward the center in the width direction.

The piston rod of the cylinder 47
When 48 sticks out and the sticking roller 50 approaches the bead core 12, the sticking roller 50 causes the widthwise central portion of the strip-shaped filler 40 wound around the bead core 12 to be the bead core 12.
At this time, each filler 39 is affixed to the outer peripheral surface of the bead core 12 whose base end surface 39a corresponds, and at the same time, the whole is shown from the state shown by the phantom line in FIG. 3 to the state shown by the solid line, that is, It rises toward the outside in the radial direction up to an angle substantially equal to the predetermined rising angle G when it is supplied to the tire building drum.

Here, as in the conventional case, the band-shaped filler 40 is wound around the entire circumference of the bead core 12, and then the pasting roller is applied.
The central part in the width direction is pressed against the bead core 12 by 50,
Although it is also possible to apply the filler 39 to each of the bead cores 12, in this embodiment, while winding the strip-shaped filler 40 around the bead core 12, here, immediately after being wound, its width is applied by the application roller 50. Press the center part of the direction to the bead core 12,
Are attached to the bead cores 12, respectively, the number of rotations of the bead cores 12 can be reduced and the work efficiency is improved.

The cylinder 47, the bracket 49, and the sticking roller 50 described above are, as a whole, supplied to the bead core 12 which is rotating in synchronization after the start end portion is pressure-bonded, and the widthwise central portion of the strip-shaped filler 40 wound around the bead core 12 is placed at the bead core. By pressing on the base 12, the base end surface 39a of the filler 39 is adhered to the outer peripheral surface of the corresponding bead core 12, and the sticking means 51 that makes each of the fillers 39 stand up radially outward is configured.

Reference numeral 53 denotes an upper horizontal frame which extends in the left-right direction and is fixed to the upper end of the main frame 11 and the upper end of the sub-frame 29 at both ends. The support plate 54 fixed to the upper horizontal frame 53 has a support plate 54. Is supported by a pair of guide rods 55 that are inclined downward as it goes to the left. 56
Is a slider slidably supported by the guide rod 55, and a cutting mechanism 58 having a guillotine blade-shaped cutter 57 is attached to the lower surface of the slider 56.

Reference numeral 59 is a cylinder attached to the support plate 54 and extending parallel to the guide rod 55.
The tip of the piston rod 60 is connected to the slider 56. As a result, when the cylinder 59 operates and the piston rod 60 retracts, the strip-shaped filler 40 on the supply means 37 waiting at the separated position separated from the bead core 12,
Although it is cut in the width direction by the cutter 57, at this time, the band-shaped filler 40 cut out is one of the outer peripheral surface of the bead core 12.
It is almost equal to the circumference.

In FIGS. 1, 4 and 5, 62 is the slider.
A pair of brackets attached to the left end of 32. These brackets 62 have a longitudinal direction (left-right direction) of the strip-shaped filler 40 immediately below the widthwise center of the strip-shaped filler 40.
A fixed shaft 63 extending to is fixed. Reference numeral 64 denotes a plurality of one-sided arms bent in a V shape. These one-sided arms 64 have a long portion 64a on one side of the bent portion, and a flat one-sided plate is provided on the upper surface of these long portions 64a. 65 is fixed.

Reference numeral 66 is a plurality of other arms which are bent in a V shape like the one arm 64. These other arms 66 have a long portion 66a on the other side from the bent portion, and these long arms 66a A flat other side plate 67 is fixed to the upper surface of the portion 66a. Then, the fixed shaft 63 is inserted into the bent portions of the one side and the other side arms 64 and 66, whereby,
These one side arm 64, one side plate 65 and the other side arm
The other plate 67 can swing about the fixed shaft 63.

Reference numeral 69 denotes a vertically extending cylinder attached to the slider 32 immediately below the fixed shaft 63. The tip of a piston rod 70 of this cylinder 69 has connecting links 71, 72 inclined with respect to the vertical direction. The lower end is rotatably connected. The upper end of the connecting link 71 is rotatably connected to the other end of the short portion 64b of the one side arm 64, and the upper end of the connecting link 72 is rotatably connected to one end of the short portion 66b of the other side arm 66. Has been done.

When the cylinder 69 operates and the piston rod 70 projects to the stroke end, one side,
The other side arms 64 and 66 are on one side, and the other side plates 65 and 67 are shown in FIG.
When the piston rod 70 retracts to the stroke end, the one side and the other side arms 64 and 66 move to the one side, the other side plate 65, and the other side plate 65,
The rocker 67 swings upward until it reaches the V-shaped tilt position shown by the phantom line in FIG.

Here, as described above, the one side plate and the other side plate
When the flat strip-shaped filler 40 is placed on the one side and the other-side plates 65 and 67 while the flat fillers 65 and 67 are located in the horizontal position, when the cylinder 59 operates as described above, the strip-shaped filler 40 Is cut linearly in the width direction by the cutter 57. At this time, the cut end of the band-shaped filler 40 on the right side of the cutter 57 becomes the starting end 40a of the band-shaped filler 40.

On the other hand, when the one-side and other-side plates 65 and 67 are located at the inclined position, if the band-shaped filler 40 is placed on the one-side and other-side plates 65 and 67, the band-shaped filler 40 Is deformed into a V-shaped cross section so as to be separated from the cutter 57 from both ends in the width direction toward the center in the width direction. When the cylinder 59 is operated in this state, the band-shaped filler 40 is recessed toward the center in the width direction by the cutter 57. It is cut into a V shape. At this time, the cut end of the strip-shaped filler 40 on the left side of the cutter 57 is the end of the strip-shaped filler 40 cut out.
It becomes 40b.

When the band-shaped filler 40 is cut by such a cutter 57, the cutter 57 is installed on one side plate 6 and the other side plate 6
Since it is inserted into the slits (not shown) formed in 5, 67, the band-shaped filler 40 is cut smoothly.
The bracket 62, the fixed shaft 63, the one side arm 64, the one side plate 65, the other side arm 66, the other side plate 67, the cylinder described above.
69, the connecting links 71, 72 as a whole cooperate with the cutter 57 to form an anvil 73 for cutting the band-shaped filler 40 in different cutting forms.

The guide rod 55 and slider described above
56, the cutting mechanism 58 having the cutter 57, the cylinder 59, and the anvil 73 as a whole, when the filler 39 is attached to most of the bead cores 12, the belt-shaped filler 40 is used as the bead core.
A cutting means 74 for cutting the circumference of 12 to be approximately equal in length is constituted.

Reference numeral 81 denotes a vertically extending cylinder attached to the left end portion of the upper horizontal frame 53, and a flat pressing member 83 is fixed to the tip of a piston rod 82 of this cylinder 81. When the pressing member 83 cuts the band-shaped filler 40 by the cutting means 74 as described above,
The band-shaped filler 40 on the bead core 12 side from the cutting position is pressed against the anvil 73 to prevent the band-shaped filler 40 from being displaced or deformed. The cylinder 81 and the pressing member 83 described above as a whole,
A cutting assisting means 84 for preventing the band-shaped filler 40 from being displaced and deformed when the band-shaped filler 40 is cut.

In FIG. 1 and FIG.
Is a joining base fixed to the main frame 11 substantially immediately above the above, and an arcuate groove 86 having a rectangular cross section through which the bead core 12 passes is formed on the upper surface of the central portion of the joining base 85. Also,
On the upper surface of the joining base 85 located on both sides of the arcuate groove 86, a receiving surface 87 is formed which is inclined at an angle substantially equal to the predetermined rising angle G of each filler 39 when the filler 39 is supplied to the tire forming drum. . As a result, the receiving surface of the joining base 85
87 supports the band-shaped filler 40 from the inner side in the radial direction so that the band-shaped filler 40 has a predetermined rising angle G when the start end and the end of the band-shaped filler 40 are joined.

Reference numeral 89 denotes a cylinder which is attached to the main frame 11 on the left side of the cylinder 47 and directly above the joining base 85 and which extends in a substantially vertical direction.
One side link that is inclined to one side toward the bottom at the tip of 90
91 and the other side link that inclines to the other side as you go down
The upper ends of 92 are rotatably connected to each other. Joining members are provided at the lower ends of the one-side links 91 and the other-side links 92, respectively.
93 and 94 are rotatably connected to each other, and these joining members 93 and 94 are connected.
Face the receiving surfaces 87 of the joining bases 85, respectively. Then, pressing pads 95 and 96 made of easily deformable soft members such as sponge are fixed to the lower surfaces of the joining members 93 and 94 facing the receiving surface 87, respectively.

Here, when the cylinder 89 is actuated and the piston rod 90 projects, the start and end portions of the band-shaped filler 40 supported from the inner side in the radial direction by the receiving surface 87 of the joining base 85 are the joining members 93, 94. The pressing pads 95 and 96 are pressed against the joining base 85 to join the start and end portions of the band-shaped filler 40. At this time, press pad 95, 96
Since the material deforms following the shapes of the start and end portions of the band-shaped filler 40, the joining of the start and end portions of the band-shaped filler 40 is ensured.

At this time, the joining member 93, the pressing pad 95 and the joining member 94, and the pressing pad 96 are moved toward the outer side in the width direction of the band-shaped filler 40 by the swing of the links 91 and 92 on the one side and the other side, respectively. However, since both ends of the tension spring 97 are locked to these joining members 93, 94, the aforementioned movement is suppressed by the elastic restoring force of the tension spring 97, and as a result, the joining members 93, 94 A force for pressing the band-shaped filler 40 against the joining base 85 is generated. As a result, the start and end portions of the belt-shaped filler 40 are spread by the joining member 93, the pressing pad 95, the joining member 94, and the pressing pad 96 from the center in the width direction to the outside in the width direction, and the joining base 85 (receiving surface 87) and are joined together.

The joining table 85, the cylinder 89, the one side and the other side links 91, 92, the joining members 93, 94, the pressing pads 95, 96 described above.
Is a filler cut out by the cutting means 74 as a whole.
When the remaining part of 39 is attached to the periphery of the bead core 12 by the rotation of the bead core 12, a joining means 98 for joining the start end and the end of the band-shaped filler 40 to each other is configured.

Reference numeral 101 denotes a cylinder to which the main frame 11 on the left side of the cylinder 89 is attached.
A knife 103 is fixed to the tip of the piston rod 102 of the. The knife 103 approaches the bead core 12 by the operation of the cylinder 101 when the start end and the end of the band-shaped filler 40 are joined by the joining means 98 as described above, but at this time, the bead core 12 is rotated. And let
The strip-shaped filler 40 that has been pasted and joined is a knife 1
The center in the width direction (connecting portion of the filler 39) is cut in the circumferential direction by 03, and divided into two bead cores with filler. The cylinder 101 and knife 103 described above are
The dividing means 104 is configured.

Next, the operation of the embodiment of the present invention will be described. When manufacturing two bead cores with filler at the same time, first, two bead cores that are coaxial with each other 12
Inserted in the annular groove 21 of the drive roller 13 in the state of being closely attached,
A bead core 12 arranged in parallel by these drive rollers 13.
Support from inside. Next, the piston rod 26 of the oscillating cylinder 25 is projected to oscillate the oscillating arm 22, and the eccentric roller 23 is moved from the position shown by the solid line to the position shown by the phantom line in FIG. As a result, the receiving portion 23a of the squeeze roller 23 is pressed against the bead core 12, and the drive roller
13. The squeeze roller 23 and the inner peripheral surface of the bead core 12 are surely brought into contact with each other without slipping.

Next, the cylinder 35 of the supply means 37 is operated to cause the piston rod 36 to project, whereby the slider 32
After moving to the approaching position, the driving roller 34 is driven and rotated to supply the flat strip-shaped filler 40 toward the bead core 12, and the starting end portion thereof is transferred onto the upper outer peripheral surface of the bead core 12. At this time, the starting end 40a of the strip filler 40 extends linearly in the width direction.

Next, the cylinder 42 of the crimping means 45 is operated to cause the piston rod 43 to project, whereby the starting end portion of the band-shaped filler 40, more specifically, the base end edge of the filler 39, is pressed by the crimping member 44 to the outer peripheral surface of the bead core 12. After pressing and crimping, the piston rod 48 is retracted to the initial position. Next, the piston rod 36 of the cylinder 35 is retracted to move the slider 32 to the separated position.
Rotate the drive roller 34 at the same peripheral speed as the moving speed of 32,
Make sure that the band-shaped filler 40 is not stretched. Here, the drive roller 34 and a motor (not shown) may be disengaged by a clutch (not shown) so that the belt-shaped filler 40 is not stretched by free rotation.

Next, when the motor 16 of the rotating means 27 is operated to synchronously rotate the drive roller 13, the two bead cores 12 receive the rotational force from the drive roller 13 and integrally rotate around the axis. At this time, the drive roller 34 is rotated in synchronization with the drive roller 13 to supply the belt-shaped filler 40 to the bead core 12 at the same speed as the peripheral speed of the bead core 12, and to wind around the bead core 12 one after another.

Simultaneously with the rotation of the bead core 12, the cylinder 47 of the adhering means 51 is operated to cause the piston rod 48 to project, and the adhering roller 50 is brought close to the bead core 12. As a result, as described above, the band-shaped filler 40 immediately after being wound around the bead core 12 has the widthwise central portion thereof attached to the attaching roller 50.
Is pressed against the bead core 12. As a result, each of the fillers 39 is attached to the outer peripheral surface of the bead core 12 whose base end surface 39a corresponds, and the whole of the filler 39 is directed outward in the radial direction to an angle substantially equal to the predetermined rising angle G when supplying to the tire forming drum. Stand up.

The belt-like filler 40 attached to the bead core 12 in this way reaches the eccentric roller 23 by the rotation of the bead core 12, and the eccentric portion of the eccentric roller 23.
The rising angle G is urged by 23b so as to be closer to a predetermined angle. Then, when the band-shaped filler 40 is attached to most of the bead core 12, the drive rollers 13, 34
Stop the rotation of.

Next, the cylinder 69 of the anvil 73 is operated to pull the piston rod 70 to the stroke end,
The one side and the other side arms 64 and 66 are swung upward to the inclined position where the one side and the other side plates 65 and 67 are bent from the horizontal position to bend in a V shape. As a result, the band-shaped filler 40 located on the one side plate 65 and the other side plate 67 is bent in a V shape around the center in the width direction (the connecting portion of the filler 39). At this time, the cutting assisting means 84 operates to cause the piston rod 82 of the cylinder 81 to project, whereby the pressing member 83 is anvil.
Approaching 73, the band-shaped filler 40 on the bead core 12 side is pressed against the anvil 73 from the cutting position.

Next, when the cylinder 59 of the cutting means 74 is actuated to pull in the piston rod 60, the cutter 57 is guided by the guide rod 55 together with the slider 56, and is displaced by the pressing member 83 so as to be prevented from moving. Filler 40
The strip-shaped filler 40 is cut in the width direction by approaching to, and the length of the strip-shaped filler 40 cut out at this time is substantially equal to one circumference of the outer peripheral surface of the bead core 12.

Then, by the first cutting described above,
The end 40b is formed on the cut band-shaped filler 40, but at the time of this cutting, since the anvil 73 is bent in the V-shaped cross section as described above, the end 40b of the band-shaped filler 40 is formed.
The (cutting end) is inclined so as to approach the drive roller 34 from the center in the width direction toward both outer sides in the width direction, and has a V-shape that is recessed toward the center in the width direction as a whole.

Next, the piston rod 82 of the cylinder 81 is retracted to separate the pressing member 83 from the band-shaped filler 40 and return to the initial position, and the piston rod 60 of the cylinder 59 is projected to set the slider 56 and the cutter 57 to the initial position. Return to. Then, the motor 16 drives the driving roller 13 again.
Is rotated in the same direction as described above. As a result, the remaining portion of the strip-shaped filler 40 cut out by rotating the bead core 12 is wrapped around the bead core 12, and then the filler 39
Similarly to the above, the remaining portions are stuck to the outer peripheral surface of the bead core 12 by the sticking roller 50 and are raised outward in the radial direction.

When the remaining portion of the band-shaped filler 40 is attached to the bead core 12 in this way, the piston rod 70 of the cylinder 69 is projected to the stroke end so that the one side and the other side plates 65, 67 are inclined from the V-shaped inclined position. It is rocked to a flat horizontal position, whereby the starting end of the strip-shaped filler 40 waiting on the anvil 73 is returned to a flat state. Next, the drive roller 34 is actuated again to send the band-shaped filler 40 to the bead core 12 side by a small amount, and then the cylinder 81 is actuated to press the bead core 12 from the cutting position by the pressing member 83.
The band-shaped filler 40 on the side is pressed against the anvil 73.

Next, the cylinder 59 is operated to re-cut the strip-shaped filler 40 in the width direction at the cutting position by the cutter 57. At this time, the strip-shaped filler 40 is cut out.
40c is discharged from above the supply means 37. Then the cylinder
59 and 81 are operated to return the cutter 57 and the pressing member 83 to the initial positions.

The start end 40a is formed on the band-shaped filler 40 by the second cutting as described above. At this time, since the anvil 73 is flat as described above, the start end 40a (cut end) of the band-shaped filler 40 is The cutting form is different from the first cutting, that is, it extends linearly in the width direction.

Next, when the beginning and the end of the strip-shaped filler 40 attached to the bead core 12 reach the joining base 85, the rotation of the drive roller 13 is stopped. Next, the piston rod 90 of the cylinder 89 is projected so that the joining member 93 and the pressing pad 95
With the joining member 94 and the pressing pad 96, the band-shaped filler 40
The start and end portions are pressed against the receiving surface 87 of the joining base 85 for pressure bonding. After that, the piston rod 90 of the cylinder 89 is retracted, and the joining member 93, the pressing pad 95 and the joining member 9 are
4. Return the pressure pad 96 and the initial position.

While adhering the fillers 39 wound around the bead core 12 to the outer peripheral surface of the corresponding bead core 12 in this manner, the filler 39 is preliminarily raised toward the outer side in the radial direction, and then the start end and the end of the band-shaped filler 40. When the fillers 39 are joined while being supported from the inner side in the radial direction by the joining base 85 so that each filler 39 has a predetermined rising angle G, the tip end side of the filler 39 is largely deformed in the radial direction during and after the joining. There is no such thing.

As a result, a large circumferential length difference does not occur between the inner peripheral portion and the outer peripheral portion of the filler 39 and between the base end portion and the front end portion. As a result, the beginning of the filler 39, It is possible to greatly reduce the amount of overlapping when joining the end portions. As a result, it is possible to suppress an increase in wall thickness at the joint, particularly at the base end of the filler 39, and improve the uniformity of the product tire.

At the time of the above-mentioned joining, the joining member 93, the pressing pad 95 and the joining member 94, the pressing pad 96 are connected to one side, the other side links 91 and 92 are swung, and the elastic restoring force of the tension spring 97 is applied to the belt-shaped filler. Since the strip-shaped filler 40 is moved toward the outer side in the width direction while pressing 40, the strip-shaped filler 40 is pressed against the joining base 85 while being spread from the center in the width direction to the outer side in the width direction, and as a result, the start of the strip-shaped filler 40. The joining state between the end portions becomes good.

At this time, the end 40 of the band-shaped filler 40
As described above, b has a V-shape that is recessed toward the center in the width direction, while the starting end 40a of the band-shaped filler 40 extends linearly in the width direction, so that the band-shaped filler 40 at the joint portion.
The amount of overlapping of the strip-shaped fillers 40 gradually increases from the widthwise center of the strip-shaped filler 40 toward the widthwise outside. As a result, the amount of overlap at the leading end of the thin filler 39 increases, and even if the base end of the thick filler 39 is made into a shape similar to butt joining, it is possible to sufficiently maintain the joining strength of the filler 39. it can. As a result, it is possible to strongly suppress an increase in wall thickness at the joint portion, particularly at the base end portion of the filler 39, and improve the uniformity of the product tire.

In this way, the filler 39 is attached to the periphery of each bead core 12, and the filler 39
When the beginning and end of the (band-shaped filler 40) are joined,
Actuating the cylinder 101 of the dividing means 104 to operate the piston rod
102 is projected, and the knife 103 is pushed into the widthwise center of the band-shaped filler 40 (the connecting portion of the filler 39). When the bead core 12 is rotated once by the drive roller 13 in this state, the connecting portion between the fillers 39 is cut in the circumferential direction, and the two bead cores with a filler are separated. Then cylinder 1
Activate 01 to return knife 103 to its initial position.

Next, the piston rod 26 of the swing cylinder 25
Are pulled in to separate the squeeze roller 23 from the bead core with filler, and then the bead core with filler is removed from the drive roller 13 and carried out to the next step. The above is one cycle of the operation of one embodiment of the present invention, and thereafter, this cycle is repeated to successively manufacture the bead core with filler.

In the above-described embodiment, at the time of the first cutting for forming the terminal end 40b of the cut band-shaped filler 40, the anvil 73 and the band-shaped filler 40 are moved from both ends in the width direction toward the center in the width direction and the cutter 57 is cut. By deforming it into a V-shaped cross section (concave shape) so as to be separated from the end, the end 40b of the band-shaped filler 40 is recessed toward the center in the width direction.
In the present invention, in the present invention, the anvil and the band-shaped filler have an inverted V-shaped cross section (convex shape) so as to approach the cutter from the center in the width direction to both ends in the width direction during the second cutting to form the starting end of the band-shaped filler. By deforming it into a shape), the starting end of the band-shaped filler may be formed into a V-shape that is recessed toward the center in the width direction. At this time, in the first cutting to form the end of the band-shaped filler, the band-shaped filler is cut into a linear shape or a concave shape.

Even in this case, since the overlapping amount of the thin filler at the tip end portion can be increased similarly to the above, it is possible to strongly increase the wall thickness at the joint portion, particularly at the base end portion of the filler. And it can be easily suppressed.

In the above-described embodiment, the anvil is deformed into a V-shaped cross section at the time of the first cutting, and the anvil is deformed into a flat shape at the time of the second cutting, but in the present invention, the upper surface is V-shaped. It is also possible to prepare two anvils, an anvil and an anvil having a flat upper surface, and use the former for the first cutting and the latter for the second cutting.

[0069]

As described above, according to the present invention, it is possible to improve the uniformity of the product tire by suppressing the increase in the wall thickness at the joint portion of the filler.

[Brief description of drawings]

FIG. 1 is an overall schematic side view showing an embodiment of the present invention.

2 is a cross-sectional view taken along the line II of FIG.

FIG. 3 is a front sectional view in the vicinity of a pasting roller.

FIG. 4 is a front view of the anvil.

FIG. 5 is a plan view showing the beginning and the end of the band-shaped filler.

FIG. 6 is a front sectional view of a joining means.

[Explanation of symbols]

12 ... Bead core 27 ... Rotation means 37 ... Supplying means 39 ... Filler 39a ... Base face 40 ... Band-shaped filler 45 ... Crimping means 51 ... Attaching means 57… Cutter 74… Cutting means 85 ... Joining base 98 ... Joining means

Claims (7)

[Claims] 1. A band-shaped filler comprising two bead cores, which are coaxially arranged in parallel, and whose proximal ends are integrally connected to each other, and which become thinner toward the distal end, and which have a substantially triangular cross-section. Supplying, the step of crimping the base end to the outer peripheral surface of the bead core at the starting end of each filler, and winding the band-shaped filler around the bead core while rotating the bead core around the axis, and the wound band-shaped filler of By pressing the central portion in the width direction against the bead core, while sticking the base end face of the filler to the outer peripheral surface of the corresponding bead core, the step of raising each filler toward the outer side in the radial direction, and the filler on most of each bead core When pasted, the process of cutting the strip-shaped filler into a length almost equal to one circumference of the bead core by a cutter, and cutting out Affixing the rest of the filler to the periphery of the bead core, and providing a step of joining the starting end and the terminating end of the band-shaped filler, after cutting the band-shaped filler, cutting the band-shaped filler again by sending out a small amount of the band-shaped filler. At the same time, the cutting form is made different between the first cutting and the second cutting, and the overlapping amount of the start and end portions of the band-shaped filler at the joint is gradually increased from the widthwise center of the band-shaped filler toward the widthwise outer side. A method of attaching a filler to a bead core, which is characterized in that. 2. The bead core according to claim 1, wherein, when joining the starting end portion and the terminating end portion of the band-shaped filler, each filler is supported from the inner side in the radial direction by a joining base so as to have a predetermined rising angle G. How to attach the filler. 3. A method of sticking a filler to a bead core according to claim 1, wherein the widthwise central portion of the wound band-shaped filler is pressed to the bead core immediately after the band-shaped filler is wound around the bead core. . 4. The strip-shaped filler is deformed into a V-shaped cross-section so as to be separated from the cutter from both ends in the width direction toward the center in the width direction at the first cutting for forming the end of the cut band-shaped filler. A method for attaching a filler to the bead core described. 5. The strip-shaped filler is deformed into an inverted V-shape in cross section so as to approach the cutter from the center in the width direction toward both ends in the width direction during the second cutting for forming the starting end of the band-shaped filler. How to attach the filler to the bead core. 6. The method according to claim 1 or 2, wherein, when joining the starting end portion and the terminating end portion of the band-shaped filler, the band-shaped filler is pressed against the bonding base while being expanded from the widthwise center toward the widthwise outside. How to attach the filler to the bead core. 7. A substantially triangular cross-section having a rotating means for synchronously rotating two coaxial bead cores arranged in parallel with each other around an axis line, and adjacent base ends being integrally connected to each other and becoming thinner toward the distal end. A supply means for supplying the bead core with a band-shaped filler composed of two fillers, a crimping means for crimping the base end to the outer peripheral surface of the bead core at the start end portion of each filler supplied to the bead core, and the crimping of the start end portion. After that, by pressing the widthwise central portion of the band-shaped filler that is supplied to the bead core that is rotating synchronously and is wound around the bead core, the base end face of the filler is attached to the outer peripheral face of the corresponding bead core, and each filler is attached. And a belt-shaped filler when the filler is attached to most of each bead core. (A) When the cutting means having a cutter that cuts to a length substantially equal to one circumference and the remaining portion of the filler cut by the cutting means are attached to the periphery thereof by the rotation of the bead core, the starting end portion and the terminating end portion of the band-shaped filler are formed. With a joining means for joining, after cutting the belt-shaped filler, while feeding the belt-shaped filler in a small amount by the feeding means and cutting the belt-shaped filler by the cutting means again,
The cutting form is different between the first cutting and the second cutting,
A device for sticking a filler to a bead core, wherein the overlapping amount of the start and end portions of the band-shaped filler in the joint is gradually increased from the widthwise center of the band-shaped filler toward the widthwise outer side.