JP2008221750A - Method and device for treating cylindrical rubber material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide, at low cost, a small size cylindrical rubber materialof a simple structure capable of being controlled easily. <P>SOLUTION: A cylindrical rubber member 15 is loosely inserted in an inner part of a holding member which is supported by a transportation means 16, then a diameter of a molding drum 14 is expanded to press the cylindrical rubber member 15 to an inner peripheral area of the holding member, followed by reducing the diameter of the molding drum 14, whereby the cylindrical rubber member 15 can be transported to the holding member. The cylindrical rubber member 15 can be transported from the molding drum 14 to the holding part only by using expanding-reducing mechanism of the diameter of the molding drum, because a conventional molding drum can be expanded and reduced in its diameter. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

    The present invention relates to a processing method and apparatus for a cylindrical rubber member for transferring the cylindrical rubber member from a molding drum to a gripping member supported by a conveying means.

As a conventional cylindrical rubber member processing method and apparatus, for example, the one described in Patent Document 1 below is known.
JP 2000-202924 A

  This is supported by a conveying means, a plurality of holders supported by the conveying means at an equal angle in the circumferential direction and movable in the radial direction, and attached to the inner end in the radial direction of each holder. A permanent magnet and a suction pad that can be gripped, an expansion / contraction means that is provided in the conveying means and moves the holder synchronously in the radial direction, and that the cylindrical rubber member can be formed on the outer periphery can be enlarged or reduced in diameter. A molding drum and moving means for loosely fitting the molding drum, the cylindrical rubber member into the holder, the permanent magnet, and the suction pad by bringing the conveying means close to the molding drum are provided.

  Then, the conveying means is moved closer to the molding drum by the moving means, and the holder, permanent magnet, and suction pad are loosely fitted outside the molding drum and cylindrical rubber member, and then the holder, permanent magnet, and suction pad are expanded and contracted by the expansion / contraction means. The cylindrical rubber member is attracted and gripped from the outside by these permanent magnets and suction pads after being moved radially inward, and then the cylindrical rubber member is reduced from the molding drum to the permanent magnet of the conveying means by reducing the diameter of the molding drum. , It is supposed to be transferred to the suction pad.

    However, in such a conventional cylindrical rubber member processing method and apparatus, the conveying means is provided with a plurality of holders separated in the circumferential direction, and expansion / contraction means for moving these holders in the radial direction in synchronization. Since this is necessary, there is a problem that the structure becomes complicated and large, and the structure becomes expensive. Moreover, since it is necessary to reduce the diameter of the forming drum after moving the holder or the like inward in the radial direction, it is necessary to control the interlock or the like between them, resulting in a problem that the control becomes complicated. .

  An object of the present invention is to provide a processing method and apparatus for a cylindrical rubber member that is simple in control, simple in structure, small and inexpensive to manufacture.

    The purpose of this is as follows. First, a conveying means for supporting a holding member that can hold the cylindrical rubber member from the outside and exhibiting a ring shape as a whole, and a molding capable of expanding and reducing the diameter of the cylindrical rubber member formed on the outer periphery. A process of loosely fitting the molding drum and the cylindrical rubber member into the gripping member by moving the drum relatively close by the moving means, and a cylindrical rubber member inside the gripping member by expanding the diameter of the molding drum. This can be achieved by a cylindrical rubber member processing method comprising a step of pressing and pressing to the periphery and a step of transferring the cylindrical rubber member from the molding drum to the gripping member by reducing the diameter of the molding drum. .

  Secondly, the cylindrical rubber member can be gripped from the outside and supports the gripping member that has an annular shape as a whole, and the cylindrical rubber member can be formed on the outer periphery, and the cylindrical rubber member When the loose fitting is carried in the gripping member, the molding rubber capable of expanding / contracting the diameter can be pressed against the inner periphery of the gripping member by expanding the diameter, and the molding drum and the conveying means are relative to each other. And a moving means capable of loosely fitting the cylindrical rubber member into the gripping member by pressing the cylindrical rubber member against the inner periphery of the gripping member and then compressing the molding drum. The diameter can be achieved by the cylindrical rubber member processing apparatus in which the cylindrical rubber member is transferred from the molding drum to the gripping member.

  In this invention, after the molding drum and the cylindrical rubber member are loosely fitted in the gripping member supported by the conveying means, the molding drum is expanded in diameter, and the cylindrical rubber member is pressed against the inner periphery of the gripping member. After that, by reducing the diameter of the molding drum, the cylindrical rubber member is transferred from the molding drum to the gripping member. However, since the existing molding drum can be expanded and contracted, the expansion and contraction of this molding drum is possible. By simply using the function, the cylindrical rubber member can be easily transferred from the molding drum to the gripping member, and as a result, the conventionally required holder and the expansion / contraction means for moving the holder in the radial direction become unnecessary. Thus, the structure is simple and small, and it can be manufactured at low cost. In addition, since only the operation of the forming drum has to be controlled at the time of transfer as described above, complicated control such as interlock is not required, and control is facilitated.

  According to the third aspect of the present invention, since a part or all of the gripping member can be replaced with a bead, the structure can be further simplified and the cost can be reduced. Further, in the cylindrical rubber member, the axial end portion is more easily deformed than the axial central portion, and if the portion is deformed, it may become an obstacle in a subsequent process, as described in claim 4. If the end in the axial direction is securely gripped, the above situation can be prevented.

  Moreover, if comprised as described in Claim 5, it can respond easily to the change of the diameter of a cylindrical rubber member. Furthermore, if constituted as described in claims 6 and 7, the gap existing between adjacent gripping segments, particularly a wide gap when gripping a large-diameter cylindrical rubber member, can be reduced or eliminated. As a result, the cylindrical rubber member can be securely gripped, and a situation in which the cylindrical rubber member partially hangs down can be prevented.

  According to the eighth aspect of the present invention, even if there is a small unevenness on the outer periphery of the cylindrical rubber member, or a part of the gripping member protrudes from the axial end of the cylindrical rubber member. The cylindrical rubber member can be securely gripped from the outside. Further, according to the ninth aspect of the present invention, when the gripping segment is moved inward in the radial direction and the bridging plate is submerged inward in the radial direction of the adjacent gripping segment, the leading end of the bridging plate is moved to the adjacent gripping segment. It is possible to sink smoothly without interference. According to the tenth aspect of the present invention, the cylindrical rubber member is strongly pressure-bonded to the gripping member, and the gripping by the gripping member is ensured.

Embodiment 1 of the present invention will be described below with reference to the drawings.
In FIGS. 1, 2, and 3, reference numeral 10 denotes a guide rail extending on the floor surface 11 and extending in the front-rear direction. A plurality of slide bearings 13 fixed to the lower surface of the drive unit 12 slide on the guide rail 10. Engagement possible. The drive unit 12 supports a base end portion (rear end portion) of a forming drum 14 having a cylindrical shape extending horizontally toward the front and capable of expanding and contracting. The forming drum 14 receives a driving force from the driving unit 12. It can be received and rotated around its axis. The forming drum 14 has a built-in expansion / contraction mechanism (not shown) including a well-known link, cam, etc. When the driving force is applied to the expansion / contraction mechanism from the driving unit 12, the forming drum 14 expands / contracts. .

  Then, when the molding drum 14 is in a reduced diameter state, a rubber ribbon of unvulcanized rubber is supplied to the molding drum 14 and wound many times in a spiral shape to form a cylindrical inner liner, and then a small number of reinforcements A ribbon-like piece extending in the axial direction in which the cord is rubber-coated with unvulcanized rubber is supplied to the forming drum 14, and the ribbon-like pieces are attached one after another while being shifted in the circumferential direction by a distance slightly shorter than the width of the ribbon-like piece. Thus, a cylindrical rubber member 15 called a carcass band, which is composed of the inner liner and the carcass ply, can be formed on the outer periphery of the forming drum 14. Here, the cylindrical rubber member may be a band composed of only the inner liner or only the carcass ply.

  On the outer periphery of the cylindrical rubber member 15 formed in this way, especially the carcass ply, small unevenness, that is, a large number of steps extending in the axial direction, is formed due to the overlapping of both ends in the width direction of adjacent ribbon-like pieces. The Thereafter, the cylindrical rubber member 15 is expanded in diameter by the expansion / contraction mechanism so that the cylindrical rubber member 15 approaches a gripping member to be described later, and the outer periphery thereof is pressed against the inner periphery of the gripping member to be pressure-bonded.

  In addition, the cylindrical rubber member described above is formed by supplying and winding a sheet body made of unvulcanized rubber around a molding drum and joining the start and end of the inner liner to form an inner liner, and then a large number parallel to the axis of the molding drum. It may be configured by forming a carcass ply by feeding and winding a sheet body coated with a reinforcing cord of a rubber to a forming drum and joining the start and end ends thereof. It may be configured by winding and stacking one or more sheets.

  16 is a conveying means installed in front of the molding drum 14, and this conveying means 16 is a horizontal rectangular plate-like shape having a plurality of slide bearings 17 slidably engaged with the guide rail 10 fixed to the lower surface. It has a base 18. Further, a gripping member, which will be described later, to which a cylindrical rubber member 15 is transferred from the molding drum 14 at the transfer position U is supported by the transport means 16. The base 18 of the transport means 16 is connected to the front end (rear end) of the piston rod 21 of the cylinder 20 extending parallel to the guide rail 10. As a result, when the cylinder 20 is operated, the transport means 16 is connected to the guide rail 10. It can move in the front-rear direction while being guided.

  A drive unit 22 is installed on the floor 11 in front of the transfer position U. The drive unit 22 has a base end portion (front end portion) of a forming drum 23 that expands horizontally and extends rearward. Is supported. Here, the molding drum 23 is coaxial with the molding drum 14 and can be rotated around the axis line by receiving a driving force from the driving unit 22. When the conveying means 16 moves to the delivery position M surrounding the molding drum 23 from the outside, the cylindrical rubber member 15 is delivered from the conveying means 16 to the molding drum 23.

  Ring bodies 24 and 25 having the same shape whose central axis is coaxial with the forming drums 14 and 23 are fixed to the upper surfaces of the front and rear end portions of the base 18, respectively. A storage groove 26 having a rectangular cross section is formed. A plurality of pairs of guide rails 28 extending in the radial direction are laid on the inner side surfaces 27 of the ring bodies 24 and 25 facing each other, and the pair of guide rails 28 are arranged at equal angles in the circumferential direction.

  On the other hand, a plurality of pairs of guide rails 30 similar to the guide rails 28 are laid on the outer surfaces 29 of the ring bodies 24 and 25, and the circumferential positions of these guide rails 30 are the same as those of the guide rails 28. 31 is a plurality of sliders that are fitted to the ring bodies 24, 25 from the inside in the radial direction, here the number of the guide rails 28, 30 is the same as the logarithm of the cross section, and the inner surface of each slider 31 is mutually connected A plurality of slide bearings 32 and 33 are slidably engaged with the guide rails 28 and 30 forming a parallel pair, respectively.

  As a result, a plurality of the sliders 31 are arranged at equal angular intervals in the circumferential direction like the guide rails 28 and 30, and can move in the radial direction while being guided by the guide rails 28 and 30. A ring-shaped rotating ring 35 is rotatably stored in each of the storage grooves 26 of the ring bodies 24 and 25, and the rotating rings 35 have inclined slits 36 penetrating the same in the radial direction. Are formed at equal distances in the circumferential direction, here, the same number as the slider 31 is formed.

  The ring bodies 24 and 25 are formed with a plurality of radial slits 37 extending in the radial direction and intersecting with the inclined slits 36, here the same number of the inclined slits 36, and these radial slits 37 are spaced equidistantly in the circumferential direction. At the same time, they are arranged between the paired guide rails 28 and 30. Reference numeral 38 denotes a plurality of pins inserted at the intersecting positions of the inclined slit 36 and the radiating slit 37 at the center, here the same number of pins as the slider 31, and both ends of these pins 38 are fixed to the slider 31. .

  As a result, the slider 31 is always located on the same circle centered on the central axis of the ring bodies 24 and 25, and when the rotating ring 35 rotates, it is synchronized with the pin 38 while being regulated by the inclined slit 36 and the radiation slit 37. And move in the radial direction by the same distance. The sliders 31 may be connected to each other by a link mechanism that is operated by a cylinder, and the sliders 31 may be synchronously moved by an equal distance in the radial direction by these link mechanisms.

  An adsorbing body 40 made of, for example, a magnet having an arc shape is fixed to the inner end portion in the radial direction at the inner end portion in the axial direction of the slider 31 fitted to the ring bodies 24 and 25. Each of these adsorbers 40 is supported by adsorbing beads 42 as gripping members in a state of being separated from each other in the axial direction, and these two beads 42 each have an inner end in the radial direction of a substantially bowl-shaped filler 41. Crimped. When the beads 42 are attracted and held by the adsorption body 40 in this way, the inner circumference of the beads 42 protrudes radially inward from the inner circumference of the slider 31 and the adsorption body 40.

  Further, gripping segments 46 having an L-shaped cross section are fixed and supported on the radially outer end of each slider 31 fitted to the ring body 24 at the radially inner end thereof. It has an arc shape having a radius of curvature substantially the same as the distance from the gripping segment 46 to the center axis of the ring body 24, and is arranged in the circumferential direction. The plurality of gripping segments 46 described above constitute a gripping body 47 as a gripping member as a whole, and the gripping body 47 is arranged such that the arc-shaped gripping segments 46 constituting the gripping body 47 are arranged in the circumferential direction as described above. Therefore, it has an annular shape as a whole.

  Further, the inner periphery of the gripping body 47 (grip segment 46) is located slightly inward in the radial direction from the inner periphery of the bead 42 supported by the adsorbing body 40. Reference numeral 48 denotes a cylinder as a moving means extending in parallel with the guide rail 10, and the drive unit 12 is connected to the tip (front end) of the piston rod 49 of the cylinder 48. As a result, when the cylinder 48 is operated, the drive unit 12 and the forming drum 14 can move in the front-rear direction while being guided by the guide rail 10.

  Then, the forming drum 14 and the driving unit 12 having the cylindrical rubber member 15 formed on the outer periphery approach the conveying means 16 when the cylinder 48 is operated and the piston rod 49 protrudes, and the cylindrical rubber member 15 is moved. It is loosely fitted into the conveying means 16 and the gripping member (bead 42, gripping body 47) stopped at the loading position U. At this time, when the cylindrical rubber member 15 approaches the gripping body 47 by expanding the diameter of the molding drum 14 by the expansion / contraction mechanism, the outer periphery of the front end portion in the axial direction of the cylindrical rubber member 15 is pressed against the inner periphery of the gripping body 47. Thus, the axial front end of the cylindrical rubber member 15 is gripped from the outside by the gripping body 47.

  Here, since the inner periphery of the grip body 47 (grip segment 46) described above is a mirror surface, the structure is simple, small, and inexpensive, but the outer periphery of the cylindrical rubber member 15 has small irregularities (as described above). Even if a part of the gripping body 47 protrudes from the front end in the axial direction of the cylindrical rubber member 15, the gripping body 47 and the cylindrical rubber member 15 are bonded to each other. Since the force, the anchor function, etc. act, the cylindrical rubber member 15 can be reliably gripped from the outside by the gripping body 47. Here, the mirror surface refers to a surface close to a glossy mirror formed by mirror finishing such as optical polishing, buffing, barrel polishing, electrolytic composite grinding, and mirror cutting.

  And, as described above, the gripping body 47 grips the axial end of the cylindrical rubber member 15, here the axial front end, which is the downstream side of the conveyance, in the cylindrical rubber member 15, If the axial end portion is more easily deformed than the central portion in the axial direction, and if the portion is deformed, it becomes a hindrance in a later process, for example, if the upper portion of the axial front end portion hangs down, the conveying means 16 causes the cylindrical rubber member to be deformed. When the 15 is transported to the delivery position M and is externally fitted to the molding drum 23, a situation occurs in which the hanging portion interferes with the molding drum 23. As described above, the axial front end of the cylindrical rubber member 15 is If the gripping body 47 is securely gripped, the above situation can be prevented.

  In this embodiment, only the axial front end of the cylindrical rubber member 15 is gripped by the gripping body 47, but only the axial rear end of the cylindrical rubber member 15 is gripped by the gripping body as necessary. May be held, or both end portions in the axial direction may be held. In short, at least one of the end portions in the axial direction of the cylindrical rubber member 15 may be held. Then, when the cylindrical rubber member 15 is gripped by the grip body 47 at at least two locations separated in the axial direction, it is possible to omit the gripping of the cylindrical rubber member 15 by the bead 42 as described later.

  Further, since the inner circumference of the gripping body 47 (grip segment 46) protrudes slightly inward in the radial direction from the inner circumference of the bead 42 supported by the adsorption body 40 as described above, it contacts the gripping body 47. Since the cylindrical rubber member 15 in the portion that is being deformed slightly (thinner thickness is reduced), the outer periphery of the cylindrical rubber member 15 is also the inner periphery of the two beads 42 adsorbed by the adsorbent 40 In this way, the cylindrical rubber member 15 is pressed by the gripping members (the beads 42 and the gripping bodies 47) in addition to the above-mentioned axial front end portion, and at the two axially separated portions in the axial direction central portion. Gripped from. Thereafter, when the diameter of the molding drum 14 is reduced, the cylindrical rubber member 15 is transferred from the molding drum 14 to a gripping member (bead 42, gripping body 47) supported by the conveying means 16, and the above-described pressure bonding is performed by the gripping member. Only from the outside.

  Thus, the cylindrical rubber member 15 can be gripped from the outside and has at least two (plural) gripping members that form an annular shape as a whole, and in this embodiment, a total of 3 of the two beads 42 and the one gripping body 47. Although only a single piece is provided in the axial direction, these gripping members (beads 42 and gripping bodies 47) are supported by the conveying means 16 comprising the base 18, the ring bodies 24 and 25, the slider 31, and the adsorbing body 40 as described above. Has been. As described above, at least two gripping members are provided apart from each other in the axial direction, and if two gripping members of the gripping members are constituted by the beads 42, a part or all of the gripping members are formed by the beads 42. Since it can be substituted, it is not necessary to install a special gripping member such as the gripping body 47 on the transport means 16, and the structure can be further simplified and inexpensive.

  In this embodiment, the cylinder 48 is used as the moving means. However, in the present invention, the cylinder 20 that moves the conveying means 16 is used, or at least one of the forming drum 14 and the conveying means 16 is used. A belt mechanism, a chain mechanism, or a rack and pinion mechanism may be used. In short, the molding drum 14 and the cylindrical rubber member 15 are moved into the gripping member by relatively bringing the molding drum 14 and the conveying means 16 close to each other. Any material can be used as long as it can be loosely fitted into the housing.

  One bracket 51 is integrally formed on the outer periphery of the rotating ring 35, and a base end portion of a screw case 52 extending in a substantially tangential direction is connected to the bracket 51 so as to be swingable. The screw case 52 is formed with a screw hole 53 extending from the distal end surface toward the base end, and the screw shaft 54 is screwed with the distal end side of the screw shaft 54. Reference numerals 55 denote brackets fixed to the outer peripheries of the ring bodies 24 and 25, respectively, and a motor 57 in which an output shaft 56 is connected to the base end of the screw shaft 54 is swingably supported by these brackets 55. .

  As a result, when the motor 57 is operated to rotate the output shaft 56 and the screw shaft 54 and rotate the rotating ring 35 relative to the ring bodies 24 and 25, the slider 31, the adsorbing body 40, and the gripping segment 46 are inclined slits. 36, synchronously move by a radial slit 37 and move by an equal distance in the radial direction. The rotary ring 35, the screw case 52, the screw shaft 54, and the motor 57 described above constitute a synchronous movement mechanism 58 that synchronously moves the slider 31, the adsorbing body 40, and the plurality of gripping segments 46 in the radial direction.

  Here, as described above, the gripping body 47 is composed of a plurality of gripping segments 46 having an arc shape arranged side by side in the circumferential direction, and these gripping segments 46 are synchronously moved in the radial direction by the synchronous movement mechanism 58. By doing so, it is possible to easily cope with a change in the diameter of the cylindrical rubber member 15. At this time, since the adsorbent 40 also moves in the radial direction together with the gripping segment 46, the bead 42 having a corresponding size can be easily gripped. In the case where the size of the cylindrical rubber member 15 to be gripped is constant, the gripping member may be composed of an integral ring body that is continuous in the circumferential direction.

  2, 61, 61 is fixed to both ends in the circumferential direction on the inner circumference of every other gripping segment 46 among the plurality of gripping segments 46 that are separated in the circumferential direction constituting the gripping body 47, These are thin-walled bridging plates extending toward the gripping segments 46 located on both sides of the gripping segments 46, and these bridging plates 61 extend in an arc along an extension line of the inner periphery of the gripping segment 46. Further, the inner circumference of these bridging plates 61 is also a mirror surface for the same reason as the inner circumference of the gripping segment 46.

  If the bridging plate 61 as described above is provided, a gap existing between the adjacent gripping segments 46, particularly a wide gap when gripping the large-diameter cylindrical rubber member 15, can be reduced or eliminated. As a result, the cylindrical rubber member 15 can be securely gripped, and a situation where the cylindrical rubber member 15 partially hangs down can be prevented.

  Here, the proximal end portion and the intermediate portion of the bridging plate 61 have an arc shape with a constant radius of curvature as described above, but the distal end portion (the free end portion separated from the gripping segment 46) is directed radially inward. As a result, part or all of the distal end portion of the bridging plate 61 has a radius of curvature smaller than that of the proximal end portion and the intermediate portion. When the leading end of the bridging plate 61 is bent in this way, when the gripping segment 46 is moved radially inward and the bridging plate 61 is brought into the radial inner side of the adjacent gripping segments 46, the bridging plate 61 It is possible to smoothly sink the tip of each of the two without interfering with the adjacent gripping segment 46.

Next, the operation of the first embodiment will be described.
When the reduced-diameter forming drum 14 is driven and rotated by the drive unit 12, a rubber ribbon is wound around the forming drum 14 in a spiral manner to form an inner liner, and then a ribbon shape extending in the axial direction. When pieces are stuck on the forming drum 14 one after another to form a carcass ply, a cylindrical rubber member 15 composed of the inner liner and the carcass ply is formed on the outer periphery of the forming drum 14. At this time, the conveying means 16 is stopped at the transfer position U, and the beads 42 with the fillers 41 are respectively held by suction by the pair of adsorbers 40.

  When the cylindrical rubber member 15 is molded on the outer periphery of the molding drum 14 as described above, the driving unit 12 and the molding drum 14 are moved forward by the cylinder 48 to approach the conveying means 16, and the molding drum 14, The cylindrical rubber member 15 is loosely fitted in the gripping members (the pair of beads 42 and the gripping body 47). In the present invention, the cylindrical rubber member 15 may be loosely fitted in the gripping member by moving the conveying means 16 backward. Thereafter, when the diameter of the forming drum 14 is increased by the expansion / contraction mechanism and the cylindrical rubber member 15 approaches the gripping body 47, the outer periphery of the cylindrical rubber member 15 is pressed against the inner periphery of the gripping segment 46 and the bridging plate 61 and is crimped. Thus, the front end portion in the axial direction of the cylindrical rubber member 15 is gripped from the outside by the gripping body 47 and the bridging plate 61.

  At this time, since the inner periphery of the gripping body 47 (grip segment 46) and the bridging plate 61 is a mirror surface, the gripping body 47, the bridging plate 61, and the cylindrical rubber member 15 have an adhesive force on the pressure-bonded surface. The cylindrical rubber member 15 is reliably gripped from the outside by the gripping body 47 and the bridging plate 61. When the bridging plate 61 is provided in this way, it is possible to reduce or eliminate a gap existing between the adjacent gripping segments 46, in particular, a wide gap when gripping the large-diameter cylindrical rubber member 15, Thereby, the cylindrical rubber member 15 can be reliably gripped.

  Here, since the inner periphery of the gripping body 47 (grip segment 46) protrudes slightly inward in the radial direction from the inner periphery of the bead 42, the cylindrical rubber member 15 at the portion in contact with the gripping body 47 is slightly By deforming, the outer periphery of the cylindrical rubber member 15 is also pressed against the inner periphery of the pair of beads 42 and crimped, whereby the cylindrical rubber member 15 is added to the axial front center portion in addition to the axial front end portion described above. In FIG. 2, the gripping members (the beads 42 and the gripping body 47) grip the outer side in two places apart from each other in the axial direction. When the diameter of the forming drum 14 is increased and the cylindrical rubber member 15 is pressed against the inner periphery of the gripping member (bead 42, gripping body 47) as described above, the forming drum 14 is rotated by a small angle around the axis. In this case, the cylindrical rubber member 15 is strongly pressed against the gripping member, and the gripping by the gripping member is ensured. Thereafter, when the diameter of the molding drum 14 is reduced, the cylindrical rubber member 15 is transferred from the molding drum 14 to a gripping member supported by the conveying means 16.

  Thus, after loosely fitting the molding drum 14 and the cylindrical rubber member 15 into the gripping members (beads 42 and gripping bodies 47) supported by the conveying means 16, the molding drum 14 is expanded in diameter to thereby form a cylindrical shape. The rubber member 15 is pressed against the inner periphery of the gripping member, and then the molding drum 14 is reduced in diameter so that the cylindrical rubber member 15 is transferred from the molding drum 14 to the gripping member supported by the conveying means 16. However, since the existing forming drum can be expanded and contracted, the cylindrical rubber member 15 can be transferred from the forming drum to the gripping member only by using the expansion / contraction function of the forming drum. The conventional holder and the expansion / contraction means for moving the holder in the radial direction are not required, the structure is simple and the size is reduced, and the manufacturing cost can be reduced. In addition, since only the operation of the forming drum 14 needs to be controlled at the time of transfer as described above, complicated control such as interlock is not necessary, and control is facilitated.

  Next, the drive unit 12 and the forming drum 14 move rearward and return to the initial positions. At this time, the cylindrical rubber member 15 gripped from the outside by the gripping body 47 and the bead 42 moves forward of the conveying means 16 to the delivery position M by the operation of the cylinder 20, so that the diameter of the molding drum 23 in the reduced diameter state is increased. Mated outside. At this time, the cylindrical rubber member 15 is securely gripped from the outside over the entire circumference by the gripping body 47, the bridging plate 61, and the bead 42, so that the upper side portion does not hang down, and the molding drum 23 It is easily fitted without interference. In the present invention, the conveying means 16 may be stationary and the forming drum 23 may move rearward to the transfer position U.

  Next, the diameter of the bead lock portion of the forming drum 23 provided at a position overlapping the bead 42 is expanded, and the bead 42 is interposed between the bead lock portion and the cylindrical rubber member as a result. 15 is gripped from the inside in the radial direction. Next, when the output shaft 56 and the screw shaft 54 are rotated by the operation of the motor 57 and the rotating ring 35 rotates clockwise in FIG. 2, the slider 31, the adsorbing body 40, and the gripping segment 46 are synchronized with each other in the radial direction. The adsorbing body 40 and the gripping body 47 are detached from the cylindrical rubber member 15 and the bead 42. Thereafter, the conveying means 16 moves rearward and returns to the transfer position U, and the slider 57 and the like move radially inward by the operation of the motor 57 to return to the initial position.

  At this time, in the molding drum 23, the bead lock portion and the bead 42 move so as to approach each other, and the molding drum 23 between these bead lock portions expands in diameter, so that the cylindrical rubber member 15 between the beads 42 is formed. 1, the cylindrical rubber member 15 on both outer sides in the axial direction from the beads 42 is folded back around the beads 42 by a bladder or the like.

  Thereafter, a belt layer is formed by sticking one after another while shifting the thin strips in which a small number of reinforcing cords are embedded outside the cylindrical rubber member 15 in the circumferential direction, and a ribbon made of unvulcanized rubber is spirally formed. A green tire is manufactured by forming a side tread and a top tread by winding many times in a spiral. Here, when the size (diameter) of the cylindrical rubber member 15 and the bead 42 is changed, the motor 57 is operated to rotate the rotating ring 35 so that the slider 31, the adsorbing body 40, and the gripping segment 46 are cylindrical. The rubber member 15 is moved to a radial position corresponding to the size of the bead 42.

    FIG. 5 is a diagram showing Embodiment 2 of the present invention. In this embodiment, a thin-arc bridge extending toward the adjacent gripping segment 46 and extending along the inner peripheral extension line of the gripping segment 46 at one circumferential end of all gripping segments 46 constituting the gripping member. The plate 63 is fixed. In this way, similarly to the above-described bridging plate 61, the gap existing between the adjacent gripping segments 46 can be reduced or eliminated, and the cylindrical rubber member 15 can be securely gripped. In addition, since the entire structure of the slider 31 and the like is the same, manufacturing is facilitated, and the manufacturing cost can be reduced. Other configurations and operations are the same as those of the first embodiment.

  The present invention can be applied to the industrial field in which a cylindrical rubber member is transferred to a gripping member.

It is a schematic front view which shows Embodiment 1 of this invention. It is the II arrow directional view of FIG. 1 where one part was fractured | ruptured. It is II-II arrow sectional drawing of FIG. It is a side view of the slider vicinity. It is a side view similar to FIG. 4 which shows Embodiment 2 of this invention.

Explanation of symbols

14 ... Molding drum 15 ... Cylindrical rubber member
16 ... Conveying means 42, 47 ... Gripping member
46… Grip segment 48… Movement means
58 ... Synchronous moving mechanism 61 ... Bridging plate
63 ... Bridge plate

Claims (10)

    The transfer means that supports the holding member that can hold the cylindrical rubber member from the outside and has an annular shape as a whole, and the molding drum that is formed on the outer periphery and has the cylindrical rubber member formed thereon can be relatively close to each other by the moving means. A step of loosely fitting the molding drum and the cylindrical rubber member into the gripping member, a step of pressing the cylindrical rubber member against the inner periphery of the gripping member by expanding the diameter of the molding drum, and a molding drum. And a step of transferring the cylindrical rubber member from the molding drum to the gripping member by reducing the diameter of the cylindrical rubber member.     The cylindrical rubber member can be gripped from the outside and supports the gripping member that has an annular shape as a whole, and the cylindrical rubber member can be formed on the outer periphery, and the cylindrical rubber member is placed in the gripping member. When being loosely fitted, the molding drum capable of expanding and contracting, which can press the cylindrical rubber member against the inner periphery of the gripping member by expanding the diameter, and the molding drum and the conveying means are brought relatively close to each other. And a moving means capable of loosely fitting the cylindrical rubber member into the gripping member, pressing the cylindrical rubber member against the inner periphery of the gripping member, and then reducing the diameter of the molding drum. An apparatus for processing a cylindrical rubber member, wherein the cylindrical rubber member is transferred from a molding drum to a gripping member.     The processing apparatus for a cylindrical rubber member according to claim 2, wherein at least two of the gripping members are provided apart from each other in the axial direction, and two of the gripping members are made of beads.     The cylindrical rubber member processing apparatus according to claim 2, wherein at least one of axial end portions of the cylindrical rubber member is gripped by the gripping member.     The gripping member is composed of a plurality of gripping segments having an arc shape arranged side by side in the circumferential direction, and a synchronous movement mechanism is provided for moving the gripping segments in the radial direction in synchronization, thereby changing the diameter of the cylindrical rubber member. The processing apparatus of the cylindrical rubber member according to claim 2, which can cope with the above.     A thin-arc shape extending toward the gripping segments located on both sides of the gripping members constituting the gripping member at both ends in the circumferential direction of the gripping members and extending along the extension line of the inner periphery of the gripping segment The processing apparatus of the cylindrical rubber member according to claim 5, wherein the bridging plates are fixed.     The thin-arc-shaped bridging plate extending to an adjacent gripping segment and extending along the inner peripheral extension of the gripping segment is fixed to one end portion in the circumferential direction of all gripping segments constituting the gripping member. Cylindrical rubber member processing equipment.     The processing apparatus of the cylindrical rubber member according to claim 6 or 7, wherein the gripping segment constituting the gripping member and the inner periphery of the bridging plate are mirror surfaces.     The processing apparatus of the cylindrical rubber member according to claim 6 or 7, wherein a front end portion of the bridging plate is bent inward in the radial direction.     10. The method according to claim 2, wherein when the cylindrical rubber member is pressed against the inner periphery of the gripping member by expanding the diameter of the molding drum, the molding drum is rotated by a minute angle around the axis. Cylindrical rubber member processing equipment.

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