JP2012240377A - Stiffener sticking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stiffener sticking device which can prevent generation of unevenness on a surface of a stiffener mounted on a bead core.SOLUTION: The stiffener sticking device includes: a bead core support means; a plurality of rocking blades 22 which are arranged circumferentially and form a support surface for supporting one side surface of the stiffener; and a rocking means which mounts the stiffener S on an outer circumferential surface of the bead core B supported by the bead core support means by raising the stiffener S laid on the support surface 24 by rocking the rocking blades 22. The rocking blades 22 are formed so that a length along a circumferential direction becomes longer as closer to an end part opposite to an end part on a side where the bead core support means is positioned so as to endlessly extend the support surface 24 circumferentially not only in a horizontal state but also in an inclined state.

Description

  The present invention relates to an apparatus for mounting and attaching a stiffener (also referred to as an epex or a bead filler) having a taper shape toward the tip, for example, on an outer peripheral surface of a bead core.

  Conventionally, as a device for attaching a stiffener to a bead core, for example, as described in Patent Document 1, a cylindrical drum, and a taper that is provided on the drum and is tapered toward the tip when the drum is contracted. It is known that a stiffener is wound in a cylindrical shape around the circumference and expanded to cause the wound stiffener to stand up in a substantially bowl shape around its base end and to be attached to the outer periphery of the bead core. ing.

  However, in such a bladder-type apparatus, the stiffener angle is not stable when the stiffener is raised by the bladder because the shape of the bladder after expansion is not always constant, and the stiffener is expected. The shape may not be attached to the bead core. In this case, when a bead core with a stiffener is set on the tire molding drum in the subsequent tire molding process and the carcass ply is folded around the bead core, a gap is generated between the main body portion of the carcass ply and the stiffener, and the tire There is concern about failure due to air remaining inside. For these reasons, it is preferable that the stiffener has a shape that matches the shape of the tire molding drum in the previous step of setting the tire molding drum. However, in the bladder, the shape after expansion is not stable as described above. This is difficult to achieve.

  On the other hand, as shown in FIG. 5, Patent Document 2 includes a plurality of swing members 100 having a rectangular shape in plan view arranged in a circumferential manner instead of a bladder, and the swing members 100 are radially formed by arms 103. An apparatus is disclosed in which the stiffener S is mounted on the bead core B by being expanded to be pressed and the stiffener S is pressed against the vertical plate 105 by the swinging member 100, and according to this apparatus, the stiffener S is disclosed. It becomes possible to stick S to the bead core B at a constant angle.

JP-A-3-164232 JP 2011-46025 A

  However, in the apparatus as described in Patent Document 2, since the length along the circumferential direction of each swing member 100 is constant from one end to the other end, which is the center of swing, As shown in FIG. 5C, when the swing member 100 is radially expanded, a gap g extending in the radial direction is generated between the swing members 100, and the stiffener S cannot be stitched in the gap g. As a result, the surface of the stiffener S becomes uneven, and when this is done, the bead core with the stiffener is set on the tire molding drum in the subsequent tire molding process, and the carcass ply is also turned around the bead core. There will be a gap between the stiffener and there will be a concern of failure due to air remaining in the tire.

  Therefore, the present invention provides a stiffener pasting device capable of preventing irregularities on the surface of a stiffener attached to a bead core on the premise that the stiffener can be attached to the bead core at an intended angle. For the purpose.

  The present invention has been made to solve the above problems, and a stiffener attaching device according to the present invention includes a bead core support means for supporting an annular bead core from the inside in the radial direction, and one side surface of the stiffener arranged in the circumferential direction. A plurality of oscillating blades that form a support surface that supports the bead core support means, the horizontal state extending along the axial direction of the bead core supported by the bead core support means, and the position of the bead core support means of the oscillating blades A plurality of oscillating blades that are oscillated with an end portion on the side to be oscillated as an oscillating fulcrum and are inclined with respect to the axial direction, and the oscillating blades are oscillated. Rocking means for mounting the stiffener on the outer peripheral surface of the bead core supported by the bead core support means by moving the stiffener lying on the support surface upright; A stiffener pasting device comprising the bead core support means on the side where the bead core support means is positioned so that the support surface extends endlessly in the circumferential direction as well as in the inclined state. It is formed so that the length along the circumferential direction becomes longer toward the end opposite to the end.

  The stiffener pasting device of the present invention comprises a pressing means for pressing the other side of the stiffener mounted on the outer peripheral surface of the bead core opposite to the one side supported by the support surface. It is preferable.

  In the stiffener pasting device of the present invention, it is preferable that the swinging means can set the swing blade to an arbitrary inclination angle.

  According to the stiffener pasting device of the present invention, the swing blade is not limited to the horizontal state but also in the inclined state, so that the end portion on the side where the bead core support means is positioned so that the support surface extends endlessly in the circumferential direction. Since the length along the circumferential direction becomes longer toward the end on the opposite side, a gap is not generated between the swinging blades when the swinging blades are radially expanded. That is, it is possible to prevent unevenness on the surface of the stiffener due to such a gap, and it is possible to eliminate the problem of air mixing and remaining in the tire.

  In addition, when a pressing means for pressing the other side of the stiffener mounted on the outer peripheral surface of the bead core on the side opposite to the one side supported by the support surface is used, a swinging blade is used as in the past. Compared to the case where the stiffener is pressed against a vertical plate to adjust the shape of the stiffener, it can be pressed locally (stitching), so the adhesive strength of the stiffener (especially the adhesive strength between the laminated stiffeners is used for large tires) While being able to raise, reliable adhesion | attachment to the bead core of the stiffener end of the bead core vicinity can be aimed at.

  Further, when the swing blade is configured to be set at an arbitrary inclination angle, the stiffener can be attached to the bead core at a desired inclination angle, so that the assembly work of the tire constituent member on the tire molding drum can be further performed. It can be performed accurately and easily.

It is sectional drawing which follows the axial direction of the stiffener sticking apparatus of one Embodiment of this invention. (A) is the schematic of the stiffener sticking apparatus of FIG. 1, (b) is the schematic plan view which took out and showed one of the rocking | fluctuation blades, (c) is A- in FIG.2 (b). It is sectional drawing which follows A line. The state which expanded the rocking | fluctuation blade | wing of the stiffener sticking apparatus of FIG. 1 is shown, (a) is sectional drawing along an axial direction, (b) is a side view when it sees along an axial direction. is there. The stiffener sticking apparatus of other embodiment of this invention is shown, (a) is a schematic perspective view, (b) is sectional drawing along the axial direction in the state which expanded the rocking | fluctuation blade | wing. And (c) is a side view in a state where the swing blade is expanded. The conventional stiffener sticking device is shown, (a) is a schematic perspective view, (b) is a sectional view in the direction of an axis in the state where the swinging blade was expanded, (b) It is a side view in the state where a rocking blade was expanded.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The present invention is characterized by the configuration of the swing blades 22 described later. First, the entire stiffener pasting apparatus including a mechanism for swinging the swing blades 22 will be described.

  In FIG. 1, reference numeral 11 denotes a cylindrical outer cylinder fixed to a fixed frame 12 and having a horizontal central axis. A plurality of, in this case, 16 guide rails 13 extend in the axial direction on the inner periphery of the outer cylinder 11. It is laid out equidistantly in the direction. A main shaft 14 is rotatably supported by the fixed frame 12 and is driven and rotated by a drive motor (not shown). The main shaft 14 is disposed on the central axis of the outer cylinder 11 and has one axial end portion. A (conical tip) slide base 15 that is coaxial with the main shaft 14 and has a larger diameter toward one side is fixed to the (tip portion).

  On the outer periphery of the slide base 15, a plurality of guide rails 18 parallel to the generatrix of the slide base 15, here the same number as the guide rails 13, are laid out at equal distances in the circumferential direction. Reference numeral 19 denotes a plurality of (same as the number of guide rails 18) slide arms extending substantially in the radial direction, and slide bearings 20 slidably engaged with the guide rails 18 are respectively provided on the inner ends of the slide arms 19 in the radial direction. It is fixed.

  One end portion of a short link 21 is rotatably connected to the radially outer end portion of the slide arm 19 via a pin 23, and the other end of the short link 21 is in a cross section orthogonal to the axial direction. The base end portion of the oscillating blade 22 having an arc shape is fixed. A plurality of oscillating blades 22 are arranged in the circumferential direction (the same number as the guide rails 18) to form a support surface 24 that supports one side surface of the stiffener S, and an axial direction of a bead core B supported by a bead core support means described later. Oscillates between a horizontal state extending along the axis and an inclined state in which the end of the oscillating blade 22 on the side where the bead core supporting means is located oscillates and extends obliquely with respect to the axial direction. Is provided.

  A substantially cylindrical slide cylinder 25 is externally fitted to the central portion of the main shaft 14 so as to be movable in the axial direction, and the slide cylinder 25 is surrounded by the slide cylinder 25 and the main shaft 14. A chamber 26 is formed. Reference numeral 27 denotes a ring-shaped piston which is fixed to the outer periphery of the central portion of the main shaft 14 in the axial direction and is housed in the cylinder chamber 26. The piston 27 is located on the one side chamber 26a on the one side in the axial direction. And the other chamber 26b on the other side in the axial direction.

  A ring-shaped support ring 29 is fixed to the outer periphery of the slide cylinder 25, and the other end of a plurality (the same number as the slide arm 19) of connection links 30 is rotatably connected to one end of the support ring 29. ing. The connecting links 30 are arranged at equal distances in the circumferential direction, and one end portions thereof are rotatably connected to the radially inner end portion of the slide arm 19.

  As a result, when the slide cylinder 25 moves toward the one side in the axial direction, the slide arm 19 is pushed by the support ring 29 and the connecting link 30 and is guided by the guide rail 18 while being almost the same as the slide cylinder 25 on the one side in the axial direction. It moves at a constant speed (slightly slower than the slide cylinder 25 due to the swing of the connecting link 30). At this time, since the guide rail 18 is inclined, the slide arm 19 gradually moves outward in the radial direction. To do.

  Reference numeral 33 denotes a fixing member fixed to the main shaft 14 on the other side in the axial direction from the slide cylinder 25, and a plurality of (slide arm 19 and The same number of racks 34 are fixed, and rack teeth are formed on the radially outer surfaces of these racks 34. A pair of racks 35 parallel to the rack 34 and disposed in a pair are arranged between the racks 34 and the outer cylinder 11. The racks 35 are slidably engaged with the guide rails 13 on the radially outer side surfaces of the racks 35. An intermediate member 37 to which the slide bearing 36 is attached is fixed, while rack teeth are formed on the inner surface in the radial direction.

  Reference numeral 40 denotes a plurality (the same number as the racks 34 and 35) of pinions rotatably supported on the outer periphery of the support ring 29 via brackets 41, and these pinions 40 are arranged at equal distances in the circumferential direction. The racks 34 and 35 are engaged with each other. As a result, when the slide cylinder 25 moves toward one side in the axial direction, the rack 35 moves in the same direction as the slide cylinder 25 at twice the speed of the slide cylinder 25 while being guided by the guide rail 13.

  Reference numeral 43 denotes a plurality of (same as the number of slide arms 19) tilting cylinders as swing angle adjusting means, and the head side of these tilting cylinders 43 is rotatably connected to one end of the rack 35 via a pin 42. The other ends of the long links 45 are fixed to the tips of the piston rods 44 of the inclined cylinders 43, and one ends of the short links 46 are rotatably connected to the one ends of the long links 45 via pins 47. Has been. Further, the central portion of the swing blade 22 is fixed to the other end of the short links 46. When the slide cylinder 25 moves to the other end in the axial direction, the swinging blade 22 extends in the axial direction as shown in the upper half of FIG. 1 and FIG. Presents.

  Reference numeral 50 denotes a support frame provided on one side of the fixed frame 12 and the main shaft 14, and a plurality of sliders 51 each having an arc shape coaxial with the axis of the main shaft 14 are supported on the support frame 50 at an equal distance in the circumferential direction. These sliders 51 are moved synchronously in the radial direction by a moving means (not shown). Examples of the moving means include, but are not limited to, a ball screw rotary actuator and an air cylinder. These sliders 51 are fixed with arc-shaped receivers 52 that support the bead core B having an annular shape from the inner side in the radial direction. When supported by the receivers 52, the bead core B is coaxial with the main shaft 14. The support frame 50, the moving means, and the receiver 52 constitute a bead core support means for supporting the annular bead core B from the radially inner side as a whole.

  Further, as described above, when the entire swinging blade 22 has an endless cylindrical shape, the rubber band immediately after being extruded from an unillustrated extruder is supplied to the rotating swinging blade 22 so as to surround it. A cylindrical stiffener S is formed by winding. Here, the stiffener S has a thickest base end, which is an end on the side where the bead core support means is located, and forms a triangle or a trapezoid that tapers toward the tip.

  In this state, when the slide cylinder 25 is moved to one side in the axial direction and the rack 35 is moved in the same direction at twice the speed of the slide cylinder 25, the long link 45 is pushed by the rack 35 and is substantially equal to the rack 35. At this time, the slide arm 19 moves to the one side in the axial direction at substantially the same speed as the slide cylinder 25, so that the speed between the long link 45 and the slide arm 19 moves. Due to the difference, the long link 45 swings radially outward about the pin 42.

  As a result, the base end portion of the swing blade 22 moves to the vicinity of the outer periphery of the bead core B, and the tip end portion thereof moves radially outward. As a result, the swing blade 22 is centered on the pin 23 as described above. From the state extending in the axial direction, the rocking is performed synchronously outward in the radial direction until it gradually becomes perpendicular to the axial direction. As a result, the stiffener S wound around the swing blade 22 and supported by the support surface 24 rises and expands from a cylindrical shape to a substantially bowl shape.

  The slide base 15, the guide rail 18, the slide arm 19, the slide bearing 20, the short link 21, the connecting link 30, the guide rail 13, the fixing member 33, the racks 34 and 35, the slide bearing 36, the intermediate member 37, and the pinion 40 described above. The bracket 41, the long link 45, the short link 46, the slide cylinder 25, the piston 27, and the support ring 29 are formed by the oscillating blade 22 by moving the tip of the oscillating blade 22 radially outward. The swinging means is constructed such that the stiffener S lying on the support surface 24 is erected and attached to the outer peripheral surface of the bead core B supported by the receiver 52. However, the swinging means is not limited to this.

  In FIG. 1, reference numeral 54 is provided adjacent to the support frame 50 and presses the other side of the stiffener S mounted on the outer peripheral surface of the bead core B opposite to the one side supported by the support surface 24. And a pressing roller as pressing means.

  Next, details of the swing blade 22 will be described. FIG. 2A is a schematic view of the stiffener pasting device in a state (horizontal state) before the swinging blade 22 is swung, and FIG. 2B is a plan view showing one of the swinging blades 22. FIG. 2C is a cross-sectional view taken along the line AA in FIG. FIG. 3A is a schematic view showing a part of the stiffener pasting device in a state where the stiffener S is erected (inclined state) by swinging the swing blade 22, and FIG. FIG. 4 is a side view of the swinging blade 22 in an inclined state as viewed along the axial direction.

  As shown in FIG. 2, each oscillating blade 22 has a fan shape in plan view so that the length along the circumferential direction becomes longer from the base end portion which is the center side of the oscillation toward the distal end portion. In other words, in the horizontal state, the swinging blade 22 partially overlaps with the adjacent swinging blade 22, and the overlapping region increases toward the tip. As a result, as shown in FIG. 3, the support surface 24 formed by the swing blades 22 can extend endlessly in the circumferential direction not only in the horizontal state but also in the inclined state. Note that the amount of overlap between adjacent swing blades 22 in the horizontal state is such that a gap is formed between adjacent swing blades 22 even when the swing blade 22 is synchronously swung to a position perpendicular to the axial direction. It is preferable that the setting is not made.

  In the present embodiment, each oscillating blade 22 has a portion corresponding to the overlapping region stepped inward in the radial direction. The support surface 24 can be formed in a flat cylindrical shape without a step by being accommodated in the step, and the accuracy of the stiffener S formed on the support surface 24 can be improved.

Next, the operation of the stiffener pasting device will be described.
Now, it is assumed that the high-pressure fluid is supplied to the other side chamber 26b of the cylinder chamber 26 and the slide cylinder 25 is moved to the other side limit as shown in the upper half of FIG. At this time, the swing blade 22 extends in the axial direction and has a cylindrical shape as a whole. On the other hand, on the support frame 50 side, after the bead B is carried in, the slider 51 is synchronously moved radially outward together with the receiver 52 by the moving means, whereby the bead B is supported by the receiver 52 from the radially inner side. .

  Next, the main shaft 14 is rotated by a drive motor so that the cylindrical swing blade 22 is integrally rotated, and the belt-like rubber immediately after being extruded from the extruder is endlessly supported by the swing blade 22. Supply to surface 24 and wrap around it. Thereby, a cylindrical stiffener S is formed around the swing blade 22.

  Next, as shown in the lower half of FIG. 1, when a high pressure fluid is supplied to the one side chamber 26 a of the cylinder chamber 26, the slide cylinder 25 moves toward one side in the axial direction. As a result, the slide arm 19 is moved by the support ring 29 and the connecting link 30 to the one side in the axial direction while being guided by the guide rail 18 at substantially the same speed as the slide cylinder 25. At this time, the guide rail 18 is inclined. Therefore, the slide arm 19 gradually moves outward in the radial direction as it moves toward the one side in the axial direction. Thereby, the base end of the swing blade 22 moves to the vicinity of the outer periphery of the bead B.

  On the other hand, the pinion 40 meshing with the racks 34 and 35 moves in the same direction as the slide cylinder 25 while rotating by the movement of the slide cylinder 25 to the one side in the axial direction. The rack 35 and the long link 45 move in the same direction as the slide cylinder 25 at a speed twice that of the slide cylinder 25 while being guided by the guide rail 13. Thus, since the moving speed of the long link 45 is larger than the moving speed of the slide arm 19, the long link 45 swings radially outward about the pin 42, and the swinging blade 22 centers about the pin 23. From the state extending in the axial direction, the rocking is synchronously rocked outward in the radial direction until it gradually becomes perpendicular to the axis. As a result, the stiffener S wound around the oscillating blade 22 expands from a cylindrical shape to a substantially bowl shape and is attached to the outer peripheral surface of the bead core B as shown in FIGS. 3 (a) and 3 (b). . At this time, since the oscillating blade 22 is formed in a fan shape having a long length along the circumferential direction toward the tip, the support surface 24 is endless in the circumferential direction even in a state perpendicular to the axial direction. The gap extends between the adjacent oscillating blades 22.

  After that, when the tilt cylinder 43 is operated to project or retract the piston rod 44, the swing blades 22 swing to one side or the other side by a predetermined angle from the vertical position. It can be set and held at an angle.

  In this state, as shown in FIG. 3A, the stiffener S mounted on the outer peripheral surface of the bead core B is supported on the support surface 24 by a pressing roller 54 provided adjacent to the support frame 50. By pressing the other side opposite to the one side, the stiffener S can be adjusted to a desired shape while being pressed against the support surface 24.

  According to the stiffener pasting device of this embodiment, the end on the side where the bead core support means is positioned so that the support surface 24 extends endlessly in the circumferential direction not only in the horizontal state but also in the inclined state. Since the length along the circumferential direction becomes longer toward the end opposite to the portion, the gap between the oscillating blades 22 is expanded when the oscillating blades 22 are radially expanded. In other words, it is possible to prevent occurrence of unevenness on the surface of the stiffener S due to such a gap, and it is possible to solve the problem of air mixing and remaining in the tire.

  Further, in the present embodiment, since a pressing roller that presses the other side of the stiffener S mounted on the outer peripheral surface of the bead core B on the side opposite to the one side supported by the support surface 24 is provided. Compared with the case where the stiffener S is pressed against the vertical plate using the swinging blade 22 and the shape of the stiffener S is adjusted, it can be locally pressed (stitching). Therefore, the adhesive force between the laminated stiffeners S) can be increased, and the stiffener base end near the bead core can be securely bonded to the bead core B.

  Further, in the present embodiment, since the swing blade 22 can be set to an arbitrary tilt angle by the tilt cylinder 43, the stiffener S can be attached to the bead core B at a desired tilt angle, and the tire molding drum The above assembly operation of the tire constituent members can be performed with higher accuracy and ease.

  Next, a stiffener pasting apparatus according to another embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the element similar to the element demonstrated in the above-mentioned embodiment, The detailed description is abbreviate | omitted.

  In the embodiment shown in FIG. 4, the stiffener attachment of the previous embodiment is provided in that a thin cylindrical elastic sheet (for example, a rubber sheet) is provided on the outer side in the radial direction of the oscillating blade 22 to wrap the support surface 24. Different from the device. This elastic sheet extends as the swing blades 22 expand and can be deformed into a donut shape.

  According to the stiffener pasting device of this embodiment, since the support surface 24 is covered with an elastic sheet that can be deformed in an annular shape, the step formed by the adjacent swinging blades 22 when the swinging blades 22 are expanded. Therefore, the outer surface of the stiffener S supported by the support surface 24 can be formed more smoothly.

  Thus, according to the present invention, provided is a stiffener pasting device capable of preventing unevenness on the surface of a stiffener attached to a bead core on the premise that the stiffener can be attached to the bead core at an intended angle. Became possible.

22 Oscillating blade 43 Inclined cylinder (Oscillating angle adjusting means)
50 Support Frame 52 Receiving 54 Pressing Roller 56 Elastic Sheet B Bead Core S Stiffener

Claims (3)

A bead core support means for supporting the annular bead core from the inside in the radial direction;
A plurality of oscillating blades arranged in a circumferential direction to form a support surface that supports one side surface of the stiffener, the horizontal state extending along the axial direction of the bead core supported by the bead core support means; A plurality of swings provided so as to be swingable between an end of the moving blade on the side where the bead core support means is located and swinging with respect to the axial direction. Moving blades,
Swinging means for mounting the stiffener on the outer peripheral surface of the bead core supported by the bead core support means by swinging the swing blade and raising the stiffener lying on the support surface. A stiffener pasting device,
An end opposite to the end on the side where the bead core support means is positioned so that the support surface extends endlessly in the circumferential direction not only in the horizontal state but also in the inclined state. A stiffener pasting device, characterized in that the stiffener pasting device is formed such that the length along the circumferential direction becomes longer toward the part.   The stiffener pasting device according to claim 1, further comprising pressing means for pressing the other side surface of the stiffener mounted on the outer peripheral surface of the bead core on the side opposite to the one side surface supported by the support surface.   The stiffener pasting device according to claim 1 or 2, wherein the swinging means can set the swinging blade at an arbitrary inclination angle.

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