JP4753551B2 - Temporary storage device for unvulcanized tires - Google Patents

Description

This invention, on the Temporary holding tube insertion location for temporarily storing the unvulcanized tire mounted filter unpleasant construction vehicle or the like.

Conventionally, as described in Patent Document 1, a large tire mounted on a construction vehicle or the like is formed by using a tire molding drum to form an unvulcanized tire, and then removing the unvulcanized tire from the tire molding drum. In addition, while gripping both bead portions of the unvulcanized tire from the inside in the radial direction by the shaping mechanism, the inner pressure is filled in the unvulcanized tire to adjust its shape, and then the shaping mechanism is used together with the unvulcanized tire. In many cases, the vulcanized tire is conveyed to a vulcanization mold and stored in the vulcanization mold, and then the unvulcanized tire is vulcanized by the vulcanization mold.
JP 2001-30254 A

  Here, since a large unvulcanized tire as described above requires a long time (several tens of hours in the case of a long time) for vulcanization, it consists of a molded unvulcanized tire and a shaping mechanism formed during the vulcanization operation. When the assembly is carried into the vulcanization mold, the assembly is temporarily stored in a horizontal state in a temporary storage device installed in the vicinity of the vulcanization mold until the vulcanization apparatus is emptied.

As such a temporary storage device, for example, the one described in the prior art of Patent Document 2 is applied, and a fixed frame and a center that is attached to the central portion of the fixed frame and supports the shaping mechanism from below. A support provided with an outer support that is provided so as to surround the central support and supports the lower sidewall portion and the shoulder portion of the unvulcanized tire from below can be used.
Japanese Patent Laid-Open No. 11-123773

  Here, various sizes of assemblies are loaded into the vulcanization mold and temporary storage device described above in response to the recent demand for high-mix low-volume production, but even when the largest-sized assembly is loaded. In order to prevent scratches and the like on the vulcanized tire, the above-mentioned temporary storage device is usually manufactured according to a maximum-size assembly.

    For this reason, when an assembly of a size smaller than the maximum size is carried into the temporary storage device, a gap is generated between the outer support and the shoulder portion of the unvulcanized tire, and the tread has a large rubber gauge and a large weight. Therefore, the unvulcanized tire is deformed so as to hang down until the shoulder portion comes into contact with the outer support due to its own weight of the tread, while the shaping mechanism is lifted from the central support under the influence of the deformation.

  When the assembly is carried into the vulcanization mold in such a deformed state, a mismatch occurs in the shapes of the cavities of the unvulcanized tire and the vulcanization mold, and as a result, the rubber flow during vulcanization is reduced. There is a problem that the tire quality is deteriorated due to non-uniformity, non-uniformity of the tread gauge, intrusion of air into the tread, bear and the like in the vulcanized tire.

The present invention aims to provide a temporary holding tube insertion location of the unvulcanized tire that can improve the tire quality by preventing deformation of the unvulcanized tire in the temporary storage time.

Such object is achieved by a temporary storage device of the unvulcanized tire you temporarily storing horizontal unvulcanized tire in a state where the shape is trimmed by shaping mechanism, a fixed frame, a central portion of the fixed frame mounted, when the shaping mechanism, the unvulcanized tire is conveyed to the temporary storage device, a central support for supporting the shaping mechanism from below, it is provided so as to surround the central support member, at least under the unvulcanized tire An outer support that supports the side shoulder portion from below and a fixed frame, and by raising and lowering the outer support, the intermediate position of both bead portions and the tread center are kept at the same height during temporary storage. a lifting means for holding and locking the shaping mechanism in the central support, the locking means for restricting movement of the shaping mechanism during temporary storage of the unvulcanized tire The buffer store unvulcanized tire provided with, can be achieved.

In the present invention, when temporarily storing an unvulcanized tire condition horizontally mounted on the shaping mechanism, by lifting the lifting means outside support for supporting from below at least the lower shoulder portion, of different sizes even unvulcanized tire, since the intermediate position and the tread center of the both bead portions so as to hold at the same height, tread even heavy hanging shoulder portion of the unvulcanized tire deformation There is no such thing and it is kept in a defined shape. As a result, the unvulcanized tire after the temporary storage is matched with the shape of the cavity of the vulcanization mold, the rubber flow during vulcanization becomes uniform, and the tire quality is improved . Also, even if about to occur is floating in shaping mechanism, it is possible to reliably prevent this, it is possible to prevent the indirect sag deformation of the unvulcanized tire by the lifting prevented.

Also, according to the structure as claimed in claim 2, it can be disengaged simultaneously shaping mechanism a plurality of engaging claws with a simple structure.

Embodiment 1 of the present invention will be described below with reference to the drawings.
In FIG. 1, M is an unvulcanized tire of a large (ultra-large) tire mounted on a construction vehicle, and this unvulcanized tire M is molded by a tire molding drum (not shown). Since it is large and heavy, it may be deformed by its own weight when left for a long time. S is a shaping mechanism for adjusting the shape of the unvulcanized tire M to a predetermined shape, and both bead portions B of the unvulcanized tire M are attached to the shaping mechanism S.

  The shaping mechanism S has a lower holder 11, and the lower holder 11 is seated on a lower bead portion B and a lower sidewall portion D on both the radially inner portions, and a seating portion 12. A substantially cylindrical cylindrical portion 13 extending upward from the radially inner end of the portion 12, a ring-shaped ring portion 14 extending radially inward from the lower end of the cylindrical portion 13, and a radius of the ring portion 14 A central portion in the axial direction (vertical direction) is integrally connected to the inner end in the direction, and includes a bottomed cylindrical portion 15 having a bottomed cylindrical shape extending in the vertical direction and having an open lower end. Then, one end (lower end) in the axial direction of the bendable bladder 16 is attached to the inner end in the radial direction of the seating portion 12 of the lower holder 11.

  Reference numeral 19 denotes a substantially ring-shaped upper holder body having a smaller diameter than the inner diameter of the bead portion B. The upper holder body 19 is disposed in close contact with the upper end of the cylindrical portion 13 and the other axial end of the bladder 16 The part (upper end part) is attached. 20 is a fastening ring that is rotatably fitted to the inner end portion of the upper holder body 19, and a plurality of projecting portions 20a projecting radially inward are formed on the inner periphery of the lower end of the fastening ring 20. The protrusions 20a are arranged equidistantly in the circumferential direction.

  On the other hand, a plurality of protruding portions 13a protruding outward in the radial direction are formed on the outer periphery of the upper end of the cylindrical portion 13, and these protruding portions 13a are also arranged at equal distances in the circumferential direction. Then, after the projecting portion 20a passes between the projecting portions 13a and penetrates downward, the fastening ring 20 rotates and the projecting portion 13a and the projecting portion 20a overlap each other vertically. Are fastened together.

  Reference numeral 23 denotes an upper holder piece seated on both of the upper bead portion B and the upper sidewall portion D on the inner side in the radial direction. The inner circumference of the upper holder piece 23 is in close contact with the outer circumference of the upper holder body 19. is doing. In addition, a plurality of projecting portions 23a projecting inward in the radial direction are formed on the inner periphery of the upper holder piece 23, and these projecting portions 23a are arranged at equal distances in the circumferential direction.

  On the other hand, a plurality of projecting portions 19a projecting radially outward are formed on the outer periphery of the upper end of the upper holder body 19, and these projecting portions 19a are also arranged at equal distances in the circumferential direction. Then, after the projecting portion 23a passes between the projecting portions 19a and penetrates downward, the upper holder piece 23 rotates and the projecting portion 19a and the projecting portion 23a are vertically overlapped. The pieces 23 are fastened together to form the upper holder 24 as a whole.

  The lower holder 11, the bladder 16 and the upper holder 24 described above constitute the above-described shaping mechanism S to which the unvulcanized tire M, specifically, both bead portions B are mounted. The unvulcanized tire M described above is mounted on the shaping mechanism S after molding and constitutes the assembly K together with the shaping mechanism S. The shaping mechanism S is formed in the bladder 16 of such an assembly K. Internal pressure is supplied and filled through a valve and a passage (not shown), whereby the bladder 16 and the unvulcanized tire M are inflated and adjusted to a predetermined shape. The assembly K in which the shape of the unvulcanized tire M is adjusted in this way is transported as it is by a transport device (not shown) to the temporary storage device 27 installed in the vicinity of the vulcanization mold, and then temporarily stored. Temporarily stored on the device 27 in a horizontally placed state.

  The temporary storage device 27 has a fixed frame 28, and a ring-shaped receiving ring 29 whose central axis extends in the vertical direction is attached to the upper surface of the fixed frame 28. When the assembly K is loaded and placed on the receiving ring 29 in a horizontally placed state, the lower surface of the seating portion 12 of the shaping mechanism S comes into contact with the upper surface of the receiving ring 29.

  Reference numeral 30 denotes a disc-like horizontal support plate having an outer edge fixed to the inner periphery of the central portion in the axial direction (vertical direction) of the receiving ring 29. The shaping mechanism S extends on the upper surface of the central portion of the support plate 30 in the vertical direction. A cylindrical guide cylinder 31 for centering the shaping mechanism S is fixed by being inserted into the bottomed cylindrical portion 15 from below. The receiving ring 29, the support plate 30, and the guide cylinder 31 described above are attached to the central portion of the fixed frame 28 as a whole, and constitute a central support 33 that supports the shaping mechanism S from below.

  In FIGS. 1 and 2, reference numeral 36 denotes a cradle that is installed so as to surround the central support 33 from the outside in the radial direction and is coaxial with the receiving ring 29 of the central support 33, and the upper surface of the cradle 36. A plurality of ring-shaped receiving rings 37 are fixed concentrically. A plurality of connecting plates 38 that extend in the radial direction and connect adjacent receiving rings 37 are fixed to the upper surface of the cradle 36, and these connecting plates 38 are arranged at equal angular intervals in the circumferential direction. The receiving ring 37 and the connecting plate 38 are mounted on at least the lower shoulder H of the unvulcanized tire M constituting the assembly K when the assembly K is temporarily stored in the temporary storage device 27. In the example, the lower shoulder portion H and the lower sidewall portion D are in contact with the radially outer portions and supported from below.

  Here, the heights of the receiving ring 37 and the connecting plate 38 become lower toward the inner side in the radial direction so as to substantially conform to the shapes of the shoulder portion H and the sidewall portion D that are in contact with the receiving ring 37 and the connecting plate 38. As a result, when the unvulcanized tire M is supported from below, no extra external force is applied from the receiving ring 37 and the connecting plate 38. The cradle 36, the receiving ring 37, and the connecting plate 38 described above are provided so as to surround the central support 33, and constitute an outer support 39 that supports at least the lower shoulder H of the unvulcanized tire M from below. To do.

  Reference numeral 43 denotes a fluid cylinder as an elevating means extending in the vertical direction provided at each of the four corners of the fixed frame 28, and the tip (upper end) of the piston rod 44 of the fluid cylinder 43 is fixed to the lower surface of the cradle 36. As a result, when the fluid cylinders 43 operate synchronously and the piston rod 44 protrudes or retracts, the outer support 39 moves up and down.

  As described above, when the assembly K is carried into the temporary storage device 27 and the shaping mechanism S is placed on the central support 33, the piston rod 44 of the fluid cylinder 43 protrudes and the outer support 39 is raised. However, the rise of the outer support 39 is caused when the outer support 39 comes into contact with the lower shoulder portion H and the sidewall portion D of the unvulcanized tire M and the tread center R of the unvulcanized tire M It stops when it is held at the same height as the intermediate position C of both bead parts B. Here, even if the sizes of the unvulcanized tires M are different, the rising of the outer support 39 is stopped when the position reaches the above-described position, so that the unvulcanized tires M based on the heavy weight of the tread T which is a heavy weight. The drooping deformation is reliably prevented regardless of the tire size.

  1, 3 and 4, a support ring 46 is fitted on the outer side of the lower end of the guide tube 31 through a spline connection so as not to rotate and to be movable up and down. The support ring 46 is spaced equidistantly in the circumferential direction. A plurality of (six) rotating shafts 47 arranged through are penetrated. Here, since these rotation shafts 47 extend in the vertical direction, the rotation shafts 47 can rotate around an axis parallel to the central axis of the shaping mechanism S. Reference numerals 48 denote a plurality of locking claws (the same number as that of the rotating shaft 47) installed at equal distances in the circumferential direction. These locking claws 48 extend horizontally and their base ends protrude upward from the support ring 46. The upper end of the rotating shaft 47 is fixed.

  A plurality of small-diameter external gears 50 that can rotate about the axis of the rotation shaft 47 (axis parallel to the central axis of the shaping mechanism S) are provided at the lower end of the rotation shaft 47 that protrudes downward from the support ring 46. As a result, the small-diameter external gear 50 is connected to the locking claw 48 via the rotation shaft 47. 51 is a large-diameter external gear that is rotatably supported on the outer side of the lower end of the support ring 46 via a bearing 52, and is coaxial with the support ring 46. The small-diameter external gear 50 is engaged. As a result, when the large-diameter external gear 51 is rotated and the small-diameter external gear 50 and the rotary shaft 47 are rotated, the locking claw 48 is shown by a virtual line in FIG. It swings between the disengagement position E and the locking position F indicated by the solid line.

  Here, when the locking claw 48 swings to the locking position F as described above, the lower surface of the tip end portion of the locking claw 48 is formed on the shaping mechanism S, specifically the outer periphery of the lower end of the bottomed cylindrical portion 15. The locking claw 48 is locked to the shaping mechanism S by contacting the upper surface of the locking ring 54 having a ring shape. On the other hand, when the locking claw 48 swings to the disengagement position E as described above, the locking claw 48 is detached from the shaping mechanism S (the locking ring 54). 55 is a plurality of horizontal fluid cylinders attached to the outer periphery of the support ring 46 via brackets 56 and extending tangentially to the outer periphery of the support ring 46. The piston rods 57 of these fluid cylinders 55 have guides on them. Racks 59 that move in the extending direction of the fluid cylinder 55 while being guided by 58 are connected to each other.

  These racks 59 mesh with the small-diameter external gears 50 arranged in the vicinity of the fluid cylinder 55. As a result, when the fluid cylinder 55 operates and the rack 59 moves in the longitudinal direction, the meshed small-diameter external gears are engaged. A driving force is applied to the large-diameter external gear 51 through 50 to rotate the large-diameter external gear 51. The fluid cylinder 55 and the rack 59 described above constitute a drive body 63 that applies a driving force to the large-diameter external gear 51 and rotates it. Further, the rotation shaft 47, the small-diameter external gear 50, the large-diameter external gear 51, and the drive body 63 as described above are engaged with the locking claw 48 in synchronism with each other so that the shaping mechanism S is locked and released. A removal mechanism 64 is configured. If the engagement / disengagement mechanism 64 is constituted by the rotation shaft 47, the small-diameter external gear 50, the large-diameter external gear 51, and the driving body 63 in this way, the plurality of engaging claws 48 can be provided with a simple structure. The shaping mechanism S can be engaged / disengaged at the same time.

  Reference numeral 67 denotes a fluid cylinder as an elevating mechanism extending in the vertical direction fixed to the support plate 30 immediately below the support ring 46, and a plurality of fluid cylinders 67, here only two, are arranged in the circumferential direction. The tips (upper ends) of the piston rods 68 of these fluid cylinders 67 are connected to the support ring 46. As a result, when the fluid cylinder 67 is operated and the piston rod 68 protrudes or retracts, the support ring 46 is locked. The claw 48 and the engaging / disengaging mechanism 64 move up and down together. The locking claw 48, the engagement / disengagement mechanism 64, and the fluid cylinder 67 as a whole are lowered by the fluid cylinder 67 after the engagement claw 48 is locked to the shaping mechanism S by the engagement / disengagement mechanism 64. By doing so, the locking means 69 is configured to press and lock the shaping mechanism S against the central support 33.

  If such a locking means 69 is provided to restrict the movement of the shaping mechanism S during temporary storage of the unvulcanized tire M, it is possible to reliably prevent the shaping mechanism S from being lifted. In addition, the suspension of the unvulcanized tire M can be indirectly prevented by the prevention of the lifting. Further, if the lock means 69 is constituted by the locking claw 48, the engagement / disengagement mechanism 64, and the fluid cylinder 67 as described above, the shaping mechanism S is securely locked to the central support 33 while having a simple structure. be able to.

Next, the operation of the first embodiment will be described.
When the molding of the unvulcanized tire M is completed in the tire molding drum, after the unvulcanized tire M is taken out of the tire molding drum, the upper holder body 19 is lifted so that the outer side of the cylindrical bladder 16 is lifted. The lower bead portion B and the sidewall portion D of the unvulcanized tire M are lowered until they are seated on the seat portion 12. Next, the upper holder main body 19 is lowered until it comes into close contact with the upper end of the cylindrical portion 13. During this lowering, the protruding portion 20a passes between the protruding portions 13a and penetrates downward. Thereafter, the fastening ring 20 is rotated until the protruding portion 13a and the protruding portion 20a overlap each other, and the upper holder body 19 is fastened to the lower holder 11.

  Next, the upper holder piece 23 is lowered until it sits on the upper holder main body 19 and the upper bead portion B and the sidewall portion D of the unvulcanized tire M, and the protruding portion 19a and the protruding portion 23a protrude in the middle of the lowering. It passes between the parts 19a and penetrates downward. Thereafter, the upper holder piece 23 is rotated until the protruding portion 23 a overlaps with the upper and lower parts, and the upper holder piece 23 is fastened to the upper holder body 19. Thus, the shaping mechanism S is assembled, and the assembly K is configured by the shaping mechanism S and the unvulcanized tire M attached to the shaping mechanism S. Thereafter, when the internal pressure is supplied and filled into the bladder 16 through the valve and the passage, the bladder 16 expands in an annular shape in the unvulcanized tire M, and the shape of the unvulcanized tire M is adjusted to a predetermined shape.

  After the assembly K in which the shape of the unvulcanized tire M is adjusted in this way is transported as it is to the temporary storage device 27 by the transport device, the shaping mechanism S (seat portion 12) is moved to the central support 33 (receiving ring). 29) and the shaping mechanism S is supported by the central support 33 from below. At this time, the guide cylinder 31 is inserted into the bottomed cylindrical portion 15 of the shaping mechanism S from below, and the shaping mechanism S is centered.

  Next, the piston rod 68 of the fluid cylinder 67 is protruded to raise the support ring 46 and the locking claw 48 until the lower surface of the locking claw 48 is above the upper surface of the locking ring 54 of the shaping mechanism S. Thereafter, when the piston rod 57 of the fluid cylinder 55 is retracted synchronously, the rack 59 applies a driving force to the large-diameter external gear 51 via the small-diameter external gear 50 and rotates the large-diameter external gear 51. At this time, since the rotation of the large-diameter external gear 51 is also transmitted to the remaining small-diameter external gears 50, all the small-diameter external gears 50 are rotated synchronously in the same direction to disengage the locking claws 48. Swing from E to locking position F.

  Thus, when the locking claw 48 is locked to the shaping mechanism S (the locking ring 54), the piston rod 68 of the fluid cylinder 67 is retracted, and the locking claw 48 is lowered together with the locking ring 54, and the shaping mechanism S (seat 12) is pressed against the central support 33 (receiving ring 29) and locked. This prevents the shaping mechanism S from being lifted, and indirectly prevents the unvulcanized tire M from hanging down.

  Next, the piston rod 44 of the fluid cylinder 43 is projected in synchronization, and the outer support 39 at the standby position P indicated by the phantom line in FIG. 1 is raised. As shown by the solid line in FIG. 1, the rise of the outer support 39 is caused by the contact of the outer support 39 with the lower shoulder portion H and sidewall portion D of the unvulcanized tire M, and When the tread center R of the sulfur tire M reaches the holding position Q held at the same height as the intermediate position C of both bead portions B, the tire T is stopped. Here, the stop position (holding position Q) of the outer support 39 differs depending on the size of the unvulcanized tire M, but the tread center R of the unvulcanized tire M is the two beads in any tire size. This is the position that reaches the same height as the intermediate position C of the part B.

  In this state, the assembly K including the unvulcanized tire M and the shaping mechanism S is temporarily stored in the temporary storage device 27 until the vulcanization of the unvulcanized tire M is started. Even in the case of ten hours, at least the lower shoulder portion H is supported from below by the outer support 39 as described above, and the tread center R of the unvulcanized tire M is at the same height as the intermediate position C of both bead portions B. Therefore, even if the tread T has a large weight, the unvulcanized tire M does not hang down and is not deformed, and is maintained in a prescribed shape. As a result, the unvulcanized tire M at the end of temporary storage matches the shape of the cavity of the vulcanization mold, the rubber flow during vulcanization becomes uniform, and the tread gauge of the vulcanized tire becomes uniform, Intrusion of air into the tread, bears and the like are suppressed, and tire quality is improved.

    In the above-described embodiment, after the shaping mechanism S is supported from below by the central support 33, the outer support 39 is raised to support at least the lower shoulder portion H of the unvulcanized tire M from below. In the present invention, however, at least the lower shoulder of the unvulcanized tire M is carried by carrying the assembly K into the temporary storage device 27 with the outer support 39 kept on standby slightly above the holding position Q. After the portion H is supported from below by the outer support 39, the outer support 39 may be lowered to the holding position Q so that the shaping mechanism S is supported from below by the central support 33.

Further, in the above-described embodiment, the receiving ring 29 is constituted by a ring shape continuous in the circumferential direction. However, in the present invention, it may be constituted by a plurality of receiving pieces that are equidistant from each other in the circumferential direction. Further, if a bowl-shaped support plate extending from the outermost side and the receiving ring 37 to the innermost receiving ring 37 is attached to the upper surface of the receiving ring 37, the support area of the unvulcanized tire M is wide. Thus, deformation of the unvulcanized tire M during temporary storage can be prevented. Further, in the embodiment described above has described the unvulcanized tire for a construction vehicle, the unvulcanized tire This may be of for trucks and buses.

The present invention, the unvulcanized tire for mounting to filter bad construction vehicle or the like can be temporarily applied to store industrial fields.

It is front sectional drawing which shows Example 1 of this invention. It is II sectional view taken on the line of FIG. It is II-II arrow sectional drawing of FIG. It is front sectional drawing of the engagement / disengagement mechanism vicinity.

27 ... Temporary storage device 28 ... Fixed frame
33 ... Center support 39 ... Outer support
43 ... Lifting means 48 ... Locking claws
50 ... Small diameter outer gear 51 ... Large diameter outer gear
63 ... Driver 64 ... Releasing mechanism
67 ... Lifting mechanism 69 ... Locking means S ... Shaping mechanism M ... Unvulcanized tire B ... Bead part H ... Shoulder part R ... Tread center

Claims (2)

A temporary storage device of the unvulcanized tire you temporarily storing horizontal unvulcanized tire in a state of trimmed shape by shaping mechanism, and the fixed frame, attached to the central portion of the fixed frame, shaping mechanisms, When the unvulcanized tire has been transported to the temporary storage device, a central support that supports the shaping mechanism from below and a central support that surrounds the central support are provided , and at least the lower shoulder portion of the unvulcanized tire is disposed from below. An outer support to be supported, and an elevating means that is provided on the fixed frame, and that lifts and lowers the outer support to hold the intermediate position of both bead portions and the tread center at the same height during temporary storage ; Japanese in that the shaping mechanism locks the center support, and a locking means for restricting the movement of the shaping mechanism during temporary storage of the unvulcanized tire Temporary storage apparatus of the unvulcanized tire shall be the. The engagement / disengagement mechanism includes a plurality of small-diameter external gears connected to the respective locking claws and rotatable about an axis parallel to the central axis of the shaping mechanism, one large-diameter external gear meshing with the small-diameter external gears, buffer store unvulcanized tire of claim 1 was formed from a drive member to rotate by applying a driving force to the large-diameter gear.

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