JP2008155418A - Method and apparatus for press-bonding tire component member, tire molding apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stably obtain enough press-bonding force and to make the press-bonding force of a joint uniform when the joint of a tire component member wound onto a molding drum is press-bonded. <P>SOLUTION: An apparatus 1 for press-bonding the joint 31 of the tire component member 30 is equipped with a press roller 10 being rotatable around the axis and having a core member 12 made of an elastomer such as rubber and a plurality of annular disks 13 which are laid in the axial direction to overlap each other and arranged around the core member 12. The press roller 10 is pushed against the joint 31, each annular disk 13 is displaced in the radial direction to correspond to the unevenness etc., of a pushing position by the elastic deformation of the core member 12, and the press surface of the press roller 10 is made to follow the shape of the joint 31 and deformed. The press roller 10 is made to tumble along the joint 31, its press surface is deformed in accordance with the shape of the joint 31, and the whole joint 31 is pressed and press-bonded. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a crimping method and a crimping device for pressing and joining a seam of a tire constituent member wound around a molding drum in a green tire (raw tire) molding process, and the crimping device and the molding drum. The present invention relates to a provided tire molding apparatus.

  A pneumatic tire is generally formed into a predetermined shape by molding a green tire by combining various tire constituent members made of unvulcanized rubber or the like, and vulcanizing and molding the tire. Conventionally, a molding method using a cylindrical molding drum has been widely used in this green tire molding process. In this method, the green tire is formed into a cylindrical shape by winding various tire constituent members such as a sheet-like inner liner and a carcass ply around the outer periphery of the molding drum and sequentially bonding them together. It is molded by bulging the center part into a substantially toroidal shape.

  In this tire component bonding process, in addition to bonding the tire component members to each other while removing the air between the stacked tire component members, the joints between the end portions of the members formed by making each tire component member cylindrical are joined. It is necessary to. Conventionally, as a means for joining the seam, there is known a pressing jig provided with a pressing roller or the like that presses the seam portion on the molding drum from the outer periphery and presses the members together using the viscosity of rubber (patent) Reference 1).

FIG. 5 is a schematic view showing an example of such a conventional pressing jig, which is not described in the patent document, FIG. 5A is a front view seen from the radial direction of the pressing roller 104, and FIG. It is the side view seen from the axial direction of the pressure roller 104.
As shown in the figure, the pressing jig 100 includes a substantially cylindrical grip 101, a roller holder 102 having a substantially U-shape (see FIG. 5A) fixed to one end (the lower end in the drawing), A support shaft 103 whose both ends are rotatably supported by the roller holder 102 and a disk-shaped pressing roller 104 attached concentrically to the support shaft 103 are provided. In this pressing jig 100, the pressing roller 104 is made of metal, and is formed to have dimensions (for example, a width of 5 mm and a diameter of about 45 mm) according to the width and shape of the seam to be pressed.

  When the seam of the tire constituent member is crimped by the pressing jig 100, the tire constituent member is wound around the molding drum, and then the operator grasps the grip 101 of the pressing jig 100 and forms the outer peripheral surface of the pressing roller 104 on the tire configuration. The member is pressed against the seam of the outer peripheral surface of the member, and the pressing roller 104 is moved (rolled) along the seam while being pressed against the molding drum. As a result, pressure is applied to the seams of the tire constituent members to press them, and the ends of the members are pressure-bonded while releasing air that has entered between the members or the joints.

  At this time, in this conventional pressing jig 100, in addition to the narrow width of the pressing roller 104, the operator performs pressing while visually confirming the joint portion. Therefore, the pressing roller 104 is accurately moved along the joint. It is difficult to move, and a certain level of skill is required to uniformly and stably press the entire seam. At the same time, since the operator manually presses the pressure roller 104 to the seam, the pressing force of the pressure roller 104 is likely to change depending on individual factors such as the operator and the length of the seam, and the pressure between the members along the seam May become non-uniform, and the crimping force may vary for each member (work). In addition, although unevenness is generated in the seam portion of the tire constituent member due to the overlap of the end portions of the member, it is difficult to follow the uneven shape of the seam with this pressing jig 100. Insufficient parts may be generated, and the crimping force of the seam may be insufficient or non-uniform. As described above, the conventional pressing jig 100 has a problem in that it is difficult to stably obtain a sufficient pressing force because the pressing force of the seam is easily influenced by the skill of the operator, the shape of the seam, and the like.

JP-A-7-32507

  The present invention has been made in view of the above-described conventional problems, and an object thereof is to stably obtain a sufficient crimping force when crimping a seam of a tire constituent member wound around a molding drum. It is to make the crimping force of the seam uniform.

The invention of claim 1 is a crimping device for a tire component member that presses and crimps a seam of a tire component member wound around a molding drum, the core member being inserted into the core member, and of the core member A plurality of annular discs arranged in an axial direction so as to be displaceable in the radial direction, and a pressure roller rotatable around an axis, and the tire configuration on the outer circumferential surface of the annular disc of the pressure roller The seam of the member is pressed and crimped.
According to a second aspect of the present invention, there is provided the tire constituent member crimping apparatus according to the first aspect, further comprising a moving means for moving the pressing roller along the seam while pressing the seam of the tire constituent member. And
The invention according to claim 3 is characterized in that, in the crimping device for a tire constituent member according to claim 1 or 2, the pressing force of the seam of the tire constituent member by the pressing roller can be adjusted.
According to a fourth aspect of the present invention, in the crimping device for a tire constituent member according to any one of the first to third aspects, the core member is made of an elastic body or an elastic body fitted to the outer periphery of the support shaft. Features.
According to a fifth aspect of the present invention, in the crimping device for a tire constituent member according to any one of the first to fourth aspects, the annular disk is made of metal.
A sixth aspect of the present invention is a tire molding apparatus for molding a green tire by combining tire constituent members, a molding drum for winding the tire constituent members, and a seam of the tire constituent members wound around the molding drums And a pressure-bonding device for a tire constituting member according to any one of claims 1 to 5, wherein the pressure-sensitive material is pressed and pressure-bonded.
According to a seventh aspect of the present invention, there is provided a tire constituent member in which a seam of a tire constituent member wound around a molding drum is pressed by a pressing roller having a plurality of annular disks arranged in parallel so as to be freely rotatable and radially displaceable. A method of pressing the pressure roller at a seam of the tire constituent member and displacing the annular disk in a radial direction; and a step of moving the seam along the seam while pressing the pressure roller; It is characterized by having.

(Function)
The seam of the tire component wound around the molding drum is pressed and pressed by a pressing roller that is rotatable around the axis. This pressing roller is composed of a core member made of an elastic body and the like, and a plurality of annular disks or the like arranged in parallel around each other in the axial direction, and presses the seam on the outer peripheral surface of the annular disk. At this time, due to the elastic deformation of the core member, each annular disk is displaced in the radial direction according to the unevenness of the seam, etc., and the pressing surface of the pressure roller is deformed following the shape of the seam to uniformly press the entire seam. And crimp.

  According to the present invention, when crimping a seam of a tire constituent member wound around a molding drum, a sufficient crimping force can be stably obtained, and the crimping force of the seam can be made uniform.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
The crimping device for a tire component according to this embodiment is for pressing a seam of a tire component such as a sheet-like inner liner or a carcass ply that is wound around a molding drum by a pressure roller. A tire molding apparatus for molding a green tire is configured by combining each tire constituent member together with a molding drum and the like.

FIG. 1 is a schematic view showing a main part of a crimping device for a tire component according to this embodiment. FIG. 1A is a front view seen from the radial direction of a pressing roller 10 provided in the crimping device 1, and FIG. 3 is a side view of the roller 10 as viewed from the axial direction. FIG.
As shown in the figure, the crimping apparatus 1 includes a pressing roller 10 that presses a seam of tire constituent members, a roller holder 2 that rotatably supports the pressing roller 10 around an axis, and one end surface of the roller holder 2 (in the drawing). And a moving means 3 (only the lower end portion is shown in the figure) for moving the roller holder 2 and the pressing roller 10.

FIG. 2 is a cross-sectional view of the pressing roller 10 cut along a plane including its axis.
As shown in FIGS. 2 and 1, the pressing roller 10 of the present embodiment has a substantially cylindrical shape as a whole, and is provided in order from the center in the radial direction (vertical direction in the figure) toward the outer peripheral side. , A support shaft 11, a core member 12, and a plurality of annular disks 13. The support shaft 11 is an elongated, substantially columnar (bar-shaped) member, and both ends thereof are rotatably supported on the lower end side (see FIG. 1) of the roller holder 2 via bearings or the like. The core member 12 is a member (here, a substantially cylindrical member) that is fitted to the outer peripheral surface of the support shaft 11, has an inner diameter corresponding to the outer diameter of the support shaft 11 (see FIG. 2), and a radial thickness. The outer diameter is formed so that the thickness becomes a predetermined thickness (for example, about 25 mm in diameter), and is attached to the approximate center of the support shaft 11 in the axial direction (left-right direction in FIG. 2). The core member 12 is made of, for example, an elastic body such as rubber or urethane, and is elastically deformed when an external force is applied, thereby enabling flexible deformation in the radial direction or the like.

  Each annular disk 13 is a disk-shaped (disk-shaped) thin plate member (for example, a disk having a thickness of about 2 mm and a diameter of about 45 mm), and a through-hole having a size corresponding to the outer diameter of the core member 12 is thick at the center. It is provided so as to penetrate in the vertical direction and is formed in a substantially annular shape. The plurality (15 in the figure) of the annular disks 13 are formed in substantially the same shape and dimensions, and are inserted around the core member 12 so that the core member 12 is positioned in the through-holes. Are arranged side by side, forming a substantially cylindrical shape as a whole. Here, each annular disk 13 is formed of, for example, a metal such as stainless steel or steel, or a rigid body such as plastic, and the central through hole is a circular hole that can be fitted to the outer periphery of the core member 12. Each thickness is formed so that the length (thickness) is substantially the same as the axial length of the core member 12 as a whole. The plurality of annular disks 13 are arranged so as to be fitted to the outer periphery of the core member 12 in a state in which they are relatively displaceable in the radial direction, and are displaced in directions other than the radial direction such as the axial direction. Is regulated.

  In the pressure roller 10 of the present embodiment, the support shaft 11, the core member 12, and the plurality of annular disks 13 are arranged concentrically with their axis centers substantially coincident with each other, and rotate around the axis as a whole. Then, the seam of the tire constituent member is pressed and crimped on the outer peripheral surface of the annular disk 13. Further, at this time, the pressing hole causes the through-hole portion of each annular disk 13 to be pressed against the outer periphery of the core member 12, but the core member 12 is elastically deformed to displace each annular disk 13 in the radial direction, Each annular disk 13 is flexibly displaced and pressed into a shape such as a concavity and convexity of the seam so as to be pressed. Accordingly, the thickness of the core member 12 in the radial direction is formed so as to be able to absorb the displacement of the annular disk 13, and the through hole of the annular disk 13 is formed accordingly.

  The roller holder 2 that supports the pressing roller 10 has a substantially U-shape when viewed from the front (see FIG. 1A), and is fixed to the substantially plate-like connecting piece 2A and both ends of the connecting piece 2A (see FIG. 1). Then, it consists of a pair of substantially parallel support pieces 2B projecting downward. The roller holder 2 rotatably supports the support shaft 11 of the pressure roller 10 on the lower end side of the pair of support pieces 2B, and maintains the pressure roller 10 inside and the annular disks 13 in contact with each other. Hold to do.

  A lower end portion of the moving means 3 is attached to a substantially central portion (see FIG. 1) on the upper surface side of the connecting member 2A of the roller holder 2. The moving means 3 moves the pressing roller 10 (annular disk 13) along the seam together with the roller holder 2 while pressing the pressing roller 10 (annular disk 13) from the outer peripheral side to the seam of the tire constituent member on the molding drum. For rolling along the seam. The moving means 3 includes, for example, a hydraulic or pneumatic piston / cylinder mechanism and driving means for moving them along the joints of the tire constituent members. The piston rod of the piston / cylinder mechanism faces the molding drum. The pressing roller 10 is moved closer to and away from the molding drum 2 and moved along the seam, for example, by attaching the roller holder 2 to the tip (lower end in the figure). Further, in this moving means 3, the pressure of the seam by the pressure roller 10 can be adjusted, for example, by changing the pressure of the piston / cylinder mechanism to change the force of pressing the pressure roller 10 to the seam of the tire constituent member. It has become.

Next, a procedure for crimping the seams of the tire constituent members using the crimping apparatus 1 will be described.
The following crimping procedure is controlled by a control device (not shown) such as a microcomputer connected to the crimping device 1 (moving means 3 or the like), and is automatically executed based on a predetermined program.

FIG. 3 is a schematic diagram for explaining a procedure for crimping the seams of the tire constituent members, and is a plan view of the substantially cylindrical molding drum 20 as viewed from above in the radial direction. Moreover, in the figure, the pressure bonding apparatus 1 shows only the pressing roller 10 (annular disk 13).
In this crimping apparatus 1, as shown in the figure, first, the pressing roller 10 is pressed by the moving means 3 to a predetermined position of the joint 31 of the tire constituent member 30 wound around the outer periphery of the molding drum 20 with a predetermined force. Here, it is pressed against the substantially central portion of the molding drum 20 in the axial direction (left-right direction in the figure).

  Subsequently, the pressing roller 10 (the pressing roller 10-1 in the figure) is moved (rolled) toward the one end surface side (the left side in the drawing) of the molding drum 20 along the seam 31 while pressing the seam 31 (see FIG. Arrow T1). At this time, the pressure is adjusted by the moving means 3 so that the pressing force (pressing force) of the pressing roller 10-1 against the joint 31 is maintained at a constant pressure and pressed to one end side of the joint 31 so that the tire component 30 Crimp approximately half of the seam 31. Next, the pressing roller 10 is moved away from the molding drum 20 and moved to a substantially central portion in the axial direction thereof, and the pressing roller 10 is again pressed near the position where the seam 31 is first pressed. Subsequently, the pressing roller 10 (the pressing roller 10-2 in the figure) is moved in the same direction and in the opposite direction along the seam 31 (arrow T2 in the figure) to the other end side (right side in the figure) of the seam 31. Press to complete the crimping of the seam 31.

FIG. 4 is a schematic diagram showing a state in which the seam 31 of the tire constituent member 30 is pressed by the crimping apparatus 1 at this time.
In the crimping apparatus 1, as shown in the figure, when the pressing roller 10 is pressed against the joint 31, the annular disks 13 are displaced in the radial direction according to the unevenness of the pressing position by the elastic deformation of the core member 12, The entire roller 10 (the pressing surface formed by the outer peripheral surface of each annular disk 13) flexibly deforms following the shape of the seam 31. In this way, the pressure bonding device 1 rolls the pressure roller 10 while displacing each annular disk 13, deforms the pressure surface of the pressure roller 10 according to the shape of the seam 31, and presses the entire seam 31.

  As described above, in the pressing roller 10 of the present embodiment, the entire seam 31 of the tire constituent member 30 can be pressed following the shape thereof, so that the seam 31 can be evenly formed without causing an insufficiently pressed portion or the like. And it can join with sufficient press-fit force. In the pressure bonding apparatus 1, the pressing roller 10 is automatically pressed against the joint 31 and is moved along the joint 31. Therefore, the pressing roller 10 can be moved along the joint 31 reliably and accurately. The whole can be pressed uniformly and stably. At the same time, the seam 31 can be pressed at an appropriate constant pressure by adjusting the pressing force by the pressing roller 10, so that the seam 31 can be joined along the longitudinal direction with a uniform crimping force, and for each member (crimping operation). Each tire constituent member 30 can be crimped with an appropriate strength while suppressing variations in the crimping force. Therefore, according to the present embodiment, a sufficient crimping force can be stably obtained without being affected by the skill of the operator, the shape of the joint 31, and the like, and the crimping force of the joint 31 can be made uniform. it can.

  Here, it is desirable that the annular disk 13 of the pressing roller 10 be made of metal, thereby applying a sufficiently large pressing force to the joint 31 while suppressing the close contact with the tire constituent member 30. it can. The core member 12 is desirably formed of rubber from the viewpoint of ease of manufacture, elastic characteristics, and the like. By doing so, deformation and restoration of the pressing surface of the pressing roller 10 can be performed smoothly and appropriately. It can be carried out.

  In the present embodiment, the core member 12 of the pressing roller 10 is formed in a substantially cylindrical shape. However, for example, the outer surface is supported by the roller holder 2 or elastic, such as a rectangular tube having a polygonal cross section, a columnar shape, or a prismatic shape. You may form in the other shape which can deform | transform. Further, the annular disk 13 only needs to be formed so that the outer peripheral surface can press the seam 31 of the tire constituent member 30 and the central through hole can be arranged around the core member 12. Therefore, the through hole of the annular disk 13 may be formed in a shape other than the circular hole in accordance with the outer shape of the core member 12 or the like. Further, in the pressing roller 10, a plurality of annular disks 13 having substantially the same thickness are used. For example, a plurality of annular disks 13 having different thicknesses are changed, for example, the thickness is sequentially changed from the central portion toward both outer sides. May be used.

It is a schematic diagram which shows the principal part of the crimping | compression-bonding apparatus of the tire structural member of this embodiment. It is sectional drawing which cut | disconnected the press roller of this embodiment by the surface containing an axis line. It is a schematic diagram for demonstrating the procedure which crimps | bonds the seam of a tire structural member with the crimping | compression-bonding apparatus of this embodiment. It is a schematic diagram which shows the state which presses the seam of a tire structural member with the crimping | compression-bonding apparatus of this embodiment. It is a schematic diagram which shows an example of the conventional press jig | tool.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Crimping device, 2 ... Roller holder, 3 ... Moving means, 10 ... Pressing roller, 11 ... Support shaft, 12 ... Core member, 13 ... Annular disk, 20 ... molding drum, 30 ... tire component, 31 ... seam.

Claims (7)

A tire component crimping device that presses and crimps a seam of a tire component wound around a molding drum,
A pressing roller that is rotatable about an axis including a core member, and a plurality of annular disks that are inserted through the core member and overlap each other in a radial direction so as to overlap each other in the axial direction of the core member; ,
A pressure-bonding device for a tire component member, wherein the outer circumferential surface of the annular disk of the pressure roller presses and crimps a seam of the tire component member. In the crimping | compression-bonding apparatus of the tire structural member described in Claim 1,
A pressure-bonding device for a tire constituent member, comprising a moving means for moving the pressing roller along the seam while pressing the seam of the tire constituent member. In the crimping | compression-bonding apparatus of the tire structural member described in Claim 1 or 2,
A pressure-bonding device for a tire constituent member, wherein a pressing force of a joint of the tire constituent member by the pressing roller is adjustable. In the crimping | compression-bonding apparatus of the tire structural member described in any one of Claim 1 thru | or 3,
The said core member consists of an elastic body or the elastic body fitted to the outer periphery of the support shaft, The crimping | compression-bonding apparatus of the tire structural member characterized by the above-mentioned. In the crimping | compression-bonding apparatus of the tire structural member as described in any one of Claim 1 thru | or 4,
A crimping apparatus for a tire constituent member, wherein the annular disk is made of metal. A tire molding apparatus for molding a green tire by combining tire constituent members,
A molding drum for winding the tire component;
A tire molding device comprising: a tire component crimping device according to any one of claims 1 to 5, wherein the tire component crimping device is configured to press and seam a tire component member wound around the molding drum. . A method for crimping a tire component member that is pressed by a pressure roller having a plurality of annular disks arranged in parallel so as to be rotatable and displaceable in a radial direction, with a seam of tire component members wound around a molding drum,
Pressing the pressure roller at the joint of the tire component to displace the annular disk in a radial direction;
And a step of moving the seam along the seam while pressing the pressure roller.

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