JP4428045B2 - Sheet pasting method and apparatus - Google Patents

Description

  The present invention relates to a sheet sticking method and apparatus, and more particularly to a sheet sticking method and apparatus in which the precision of sticking a sheet member is increased.

  For example, in the step of forming a green tire, there is a step of attaching a reinforcing sheet member in which the arranged reinforcing cords are embedded in an unvulcanized rubber layer to the bead filler attached to the outer peripheral side of the bead core. In this sheet attaching step, conventionally, a dedicated bladder is used, and after attaching the sheet member in an annular shape on the bladder, the sheet member is inverted by inflating the bladder, and then inflated by the pressing means. A method is adopted in which a sheet member that is inverted through a bladder is pressed to be attached to one annular surface of a bead filler (see, for example, Patent Document 1).

  However, the above-described method has a problem that the pasting accuracy is poor because the sheet member is reversed and pasted.

In addition, the above-mentioned sheet member is affixed on the bladder so as to have a splice portion where the attachment start end portion and the end end portion wrap, but the splice portion is easily peeled off by reversal, so the wrap amount of this splice portion is increased. It is necessary to take. The amount of lap in the splice affects the tire uniformity, and the smaller the amount of lap, the higher the uniformity.
JP-A-7-52279

  An object of the present invention is to provide a sheet sticking method and apparatus capable of improving the sticking accuracy of a sheet member and reducing the amount of lap of a splice part.

The sheet sticking method of the present invention that achieves the above object comprises a strip-shaped sheet member made of unvulcanized rubber that can be extended along one annular surface of an unvulcanized bead filler disposed on the outer peripheral side of a bead core. A sheet attaching method for attaching to a ring, wherein the sheet member sent toward the bead filler on a rotating turntable is attached to one annular surface of the bead filler while being pressed by a rotatable press roll. When attaching, using a multi-plate roll in which a plurality of plate-like rings are rotatably stacked on the press roll, while extending the portion to be attached to the outer peripheral side of the annular surface of the sheet member fed by the multi-plate roll It is characterized by being bonded by pressure bonding.

The sheet sticking device of the present invention that achieves the above object comprises a belt-like sheet member made of unvulcanized rubber that can be extended along one annular surface of an unvulcanized bead filler disposed on the outer peripheral side of a bead core. a seat applier paste annularly, a rotatable turntable for mounting said bead filler, and a feed unit feeding the sheet member toward the bead filler being placed on said turntable, exits said transmission A multi-plate comprising a plurality of plate-like rings, the pressure roll having a rotatable press roll for crimping the sheet member fed by the means to one annular surface of the bead filler. Consisting of a roll, the sheet member fed by the multi-plate roll can be crimped while extending the portion to be attached to the outer peripheral side of the annular surface And features.

As described above, a multi-plate roll in which a plurality of plate-like rings are rotatably stacked on a press roll is used, and the portion to be attached to the outer peripheral side of the annular surface of the fed sheet member is rotated while being stretched by the multi-plate roll. Since the bead filler is pressure-bonded and attached to one annular surface of the bead filler on the turntable, the sheet member can be attached in an annular shape with high accuracy along the annular surface of the bead filler .

Moreover, since the paste sheet member along the annular surface directly, less conventionally wrapped amount substantially becomes possible to state 0 lap amount, in the air-filled tire to improved uniformity Contribute.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 shows a schematic diagram of one embodiment of a sheet attaching apparatus of the present invention, placing a bead ring body Z, which were provided with the bead filler Y triangular cross-section made on the outer peripheral side from the unvulcanized rubber of the bead core X A turntable 1 is provided.

  As shown in FIG. 2, the turntable 1 is fixed to the upper end of a rotary shaft 5 erected on a movable body 3 so as to be rotatable, and is driven via gears 6 and 8 by a drive motor 4 installed on the movable body 3. Thus, the rotating shaft 5 is rotated, whereby the turntable 1 is rotated. The movable body 3 is slidably mounted on a guide rail 7 extending in a direction perpendicular to the feeding direction of a belt-like sheet member 9 described later, and can be moved along the guide rail 7 by a moving means (not shown). It has become. Thus, the turntable 1 can be moved along the guide rail 7 and the turntable 1 is moved according to the bead filler Y having different sizes so that the positions of the respective means described later can be used in a fixed state. ing.

  Sending out an extensible belt-like sheet member 9 formed by embedding a reinforcing cord in an unvulcanized rubber layer toward a bead filler Y placed on the turntable 1 at a predetermined interval from the turntable 1 Means 11 are provided. The delivery means 11 includes a drive roll 13 (see FIG. 3) that is rotationally driven by a drive motor 12 and a rotatable presser roll 15 that is disposed above and below the drive roll 13 so as to be movable up and down. The sheet member 9 sandwiched between the sheet 13 and the sheet 13 can be sent to the turntable 1 side by the rotation of the drive roll 13.

On one side of the turntable 1, a crimping unit 17 that crimps the sheet member 9 fed by the feeding unit 11 to one of the annular surfaces Y1 of the bead filler Y (upper side in FIG. 2 ) is installed. The crimping means 17 includes a rotatable press roll 19 that crimps the sheet member 9 to the annular surface Y1. The press roll 19 is disposed above the turntable 1 and is composed of a multi-plate roll formed by laminating a plurality of plate-like rings 23 on the tip end portion 21a of the support shaft 21 in a rotatable manner.

  By adopting a multi-plate roll, as will be described later, it is possible to press-bond while extending the portion to be attached to the outer peripheral side of the annular surface Y1 of the fed sheet member 9. The plurality of plate-like rings 23 are detachably attached to the tip end portion 21a of the support shaft 21, and the width of the press roll 19 is changed by adjusting the number of plate-like rings 23 to be attached. It can be adapted to.

  A rear end portion of the support shaft 21 extends in the horizontal direction and is fixed to a shaft body 25 that is rotatably supported. A tip end portion of an arm 27 is fixed to the shaft body 25, and a rear end side of the arm 27 is connected to a rotating means 29 that rotates the shaft body 25. The rotating means 29 includes a cylinder 35 having a cylinder body 31 and a telescopic rod 33 protruding upward from the cylinder body 31, and the upper end of the telescopic rod 33 is connected to the arm 27 via a connecting pin 37. The rear end is connected.

  When the telescopic rod 33 extends upward by the operation of the cylinder 35, the press roll 19 moves in the direction close to the turntable 1 with the shaft body 25 rotating in one direction (counterclockwise in the figure) as a fulcrum, and the telescopic rod 33 Is reduced downward, the press roll 19 is moved away from the turntable 1 with the shaft body 25 rotating in the other direction (clockwise in the figure) as a fulcrum.

  Between the delivery means 11 and the press roll 19, a guide means 39 is provided for guiding the sheet member 9 delivered by the delivery means 11 to a crimping position where the sheet member 9 is crimped by the press roll 19. The guide means 39 may adopt any conventionally known configuration, and for example, the one shown in FIG. 4 can be preferably used.

  The guide means 39 shown in FIG. 4 includes a guide passage 43 having a rectangular cross section penetrating along the longitudinal direction of the block body 41 having a rectangular cross section. An adjustment pin 46 projects from the upper side of the guide path 43 through a long hole 45 extending in the width direction from above, and a support plate 47 fixed to the upper end of the adjustment pin 46 is moved in the width direction as indicated by an arrow. Thus, the guide width of the guide path 43 can be adjusted by the adjustment pin 46.

  49 is a control means for controlling the rotational speeds of the drive motor 4 for rotating the turntable 1 and the drive motor 12 for rotating the drive roll 13, and this control means 49 is a delivery speed for feeding the sheet member 9 ( m / sec), and S ≦ T, where T is the peripheral speed (m / sec) at the sheet member adhering inner peripheral end position A of one annular surface Y1 of the bead filler Y rotating together with the turntable 1. Thus, the delivery speed S of the delivery means 11 and the rotational speed of the turntable 1, that is, the rotational speed of the drive motors 4 and 12 are controlled. Reference numeral 51 denotes a rotatable support roll that supports the sheet member 9 to be fed out.

  Hereinafter, the sheet sticking method of the present invention will be described using the sheet sticking apparatus described above. After the operator sets the leading end of the continuous belt-like sheet member 9 on one annular surface Y1 of the bead filler Y on the turntable 1, the telescopic rod 33 of the cylinder 35 is extended, so that the turntable 1 The press roll 19 in the separated standby position is lowered and presses the leading end portion of the sheet member 9 to be crimped to the annular surface Y1.

  In this state, the drive motors 4 and 12 operate, and the turntable 1 and the drive roll 13 rotate at a constant speed while maintaining a relationship of S ≦ T. As a result, the sheet member 9 fed toward the bead filler Y on the rotating turntable 1 is annularly attached along the annular surface Y1 while being pressed against one annular surface Y1 of the bead filler Y by the press roll 19. At this time, the plurality of plate-like rings 23 of the press roll 19 that rotates while being pressed against the annular surface Y1 via the sheet member 9 are arranged so that the plate-like ring 23 located on the outer peripheral side of the annular surface Y1 is annular. It rotates at a high rotation speed according to the peripheral speed difference of the surface Y1.

  As a result, the sheet member 9 fed by the drive roll 13 is attached to the outer peripheral side of the annular surface Y1 while being conveyed between the drive roll 13 and the press roll 19, and the peripheral speed difference of the annular surface Y1 is increased. Correspondingly, it is crimped and stuck on the annular surface Y1 while being stretched by the press roll 19. By pasting the sheet member 9 on the annular surface Y1 over one circumference, the pasting of the sheet member 9 is completed. Thereafter, the press roll 19 is raised, and the attached sheet member 9 is cut by an operator or a cutting device (not shown) at a position where the front end portion and the rear end portion meet, and then joined so as to substantially meet each other. .

  When the sheet member 9 is attached to a bead filler having a size smaller than that of the bead filler Y, the turntable 1 is moved to the crimping means 17 side. Moreover, a part of several plate-shaped ring 23 is removed from the support shaft 21, and the width | variety of the press roll 19 is made to correspond substantially with the width | variety of the annular surface of a bead filler. In the case of a large size bead filler, the turntable 1 is moved away from the crimping means 17 while the number of plate-like rings 23 is increased so that the width of the press roll 19 is substantially equal to the width of the annular surface of the bead filler. Match.

  According to the present invention described above, a multi-plate roll in which a plurality of plate-like rings 23 are rotatably stacked on the press roll 19 is used, and the portion to be attached to the outer peripheral side of the annular surface Y1 of the fed sheet member 9 is multi-plate. While being stretched by a roll, the sheet member 9 can be attached to the annular surface Y1 in an annular shape with high precision because it is bonded to one annular surface Y1 of the bead filler Y on the turntable 1 that rotates. Since the sheet member 9 is directly affixed annularly along the annular surface Y1, it is possible to reduce the lap amount to a substantially zero lap amount and contribute to improvement of uniformity in the pneumatic tire. .

  Moreover, the pasting apparatus using the conventional bladder requires a bladder unit for each size for bead fillers of different sizes, and the apparatus is complicated, so there is a disadvantage that it is expensive. In the apparatus of the present invention, the plurality of plate rings 23 constituting the press roll 19 can be attached and detached, and the turntable 1 can be moved, thereby complicating the apparatus for bead fillers of different sizes. It is possible to easily cope with this, and the cost can be reduced.

  In the present invention, the relationship between the sending speed S and the peripheral speed T is preferably S ≦ T ≦ 1.05S. When the peripheral speed T is lower than the delivery speed S, the inner peripheral portion of the sheet member 9 is loosened and stuck, and wrinkles are easily generated. Conversely, when the peripheral speed T exceeds 1.05 S, the sheet member 9 is excessively stretched. Thus, a large width variation is likely to occur in the sheet member 9.

The present invention, as described above, physicians use the bead filler Y attached to the outer peripheral side of the bead core X, to paste a strip of sheet member 9 made reinforcing cord is embedded in the unvulcanized rubber layer as a reinforcing layer The

The sheet member 9 is a sheet member made of unvulcanized rubber that can be pasted extensible.

It is a schematic plane explanatory drawing which shows one Embodiment of the sticking apparatus of this invention. It is side surface explanatory drawing of a turntable and a crimping | compression-bonding means. It is explanatory drawing of a sending means. It is side surface explanatory drawing of a guide means.

Explanation of symbols

1 turntable 3 movable body 5 rotating shaft 9 sheet member 11 transmitting unit 13 drives the roll 17 pressing means 19 press roll 23 plate ring 39 guide means 49 control means Y bead filler over Y1 annular surface

Claims (9)

A sheet affixing method for affixing a belt-like sheet member made of unvulcanized rubber that can be extended along one annular surface of an unvulcanized bead filler disposed on the outer peripheral side of a bead core , and rotating When affixing the sheet member fed toward the bead filler on the turntable to one annular surface of the bead filler while being pressed by a rotatable press roll, a plurality of plate-like rings are attached to the press roll. A sheet affixing method in which a multi-plate roll stacked in a rotatable manner is used, and a portion to be affixed to the outer peripheral side of the annular surface of the sheet member fed out by the multi-plate roll is pressed and stretched. The relationship between the sending speed S for feeding out the sheet member and the peripheral speed T at the inner peripheral end position of the sheet member attachment on one annular surface of the rotating bead filler is attached so that S ≦ T. The sheet sticking method according to 1.   The sheet sticking method according to claim 2, wherein a relationship between the sending speed S and the peripheral speed T is set to S ≦ T ≦ 1.05S. The sheet sticking method according to any one of claims 1 to 3, wherein the sheet member is formed by embedding a reinforcing cord in an unvulcanized rubber layer. A sheet affixing device for annularly affixing a belt-shaped sheet member made of unvulcanized rubber that can be extended along one annular surface of an unvulcanized bead filler disposed on the outer peripheral side of a bead core, the bead a rotatable turntable for placing a filler, and a feed unit feeding the sheet member toward the bead filler being placed on the turntable, the sheet member fed by said transmission detecting means one of the bead filler A pressure-bonding means having a rotatable press roll for pressure-bonding to an annular surface, the press roll is composed of a multi-plate roll in which a plurality of plate-like rings are rotatably stacked, and the multi-plate roll is fed out A sheet affixing device that enables crimping while extending a portion to be affixed to the outer peripheral side of the annular surface of the sheet member. A delivery speed S for feeding the sheet member, the relation between the peripheral speed T of the sheet member pasted inside circumferential end position of one annular surface of the bead filler to rotate, the delivery means so as to be S ≦ T The sheet sticking apparatus according to claim 5 , wherein a feeding speed and a rotation speed of the turntable can be controlled. The sheet sticking apparatus according to claim 6 , wherein a relationship between the sending speed S and the circumferential speed T is S ≦ T ≦ 1.05S. The sheet sticking device according to any one of claims 5 to 7, wherein the plurality of plate-like rings are detachable and the turntable is movable. The sheet sticking device according to any one of claims 5 to 8, wherein the sheet member has a reinforcing cord embedded in an unvulcanized rubber layer.

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