JP2005169575A - Method and device for gripping annular body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method/device for gripping a green tire G or the like without needing to replace a grip means 35 even with a change in the radius of the green tire G or the like and hardly forming a recess or the like in the green tire G or the like in gripping it. <P>SOLUTION: The grip means 35 is composed of a bendable grip belt 47 extending in a circumferential direction, and rollers 40, 41 wound with both circumferential ends of the grip belt 47. Consequently, when the grip belt 47 is pressed to the outer periphery of the green tire G to grip the green tire G, the grip belt 47 is deformed along the outer periphery of the green tire G to contact the green tire G in large area. As a result, there is no need to replace the grip means 35 even with the change in the radius, and the recess or the like is hardly formed in gripping the green tire G. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

    The present invention relates to an annular body gripping method and apparatus for gripping an annular body such as a green case and a green tire from the outside.

As a conventional method and apparatus for holding a torus, for example, the one described in Patent Document 1 below is known.
JP-A-62-130834

  This has a ring part whose inner diameter is larger than that of the green case (annular ring), a plurality of arc-shaped segment plates made of metal, arranged in the ring part at an equal distance in the circumferential direction, and a ring part. When the green case is inserted, the segment plate is moved inward in the radial direction in synchronism, and the moving means is configured to grip the green case from the outside by the segment plate. In this case, after inserting the green case into the ring portion while maintaining the coaxial relationship, the segment plates are moved inward in the radial direction in synchronization with the moving means, whereby each segment plate is moved to the green case. The green case is pressed from the outside so as to be gripped from the outside.

    However, in such a conventional method and apparatus for holding a torus, since the segment plate is made of metal, the inner circumference of the segment plate that contacts the torus is limited to one radius of curvature. The Here, there is no problem when the radius of curvature of the inner circumference of the segment plate is the same as the radius of the gripped torus, but the torus is accompanied by a change in the rim diameter or size of the pneumatic tire to be molded. When the radius changes, the segment plate comes into contact with the torus with a narrow width (only in the circumferential direction or at the circumferential center).

  Here, when the torus is a green case containing unvulcanized rubber, a green tire or the like, the outer periphery of the torus is recessed due to the partial contact as described above, and scratches are generated. Product tire uniformity was deteriorating. In order to solve such a problem, conventionally, every time there is a change in the rim diameter (circular radius) or size of a pneumatic tire, the segment plate is replaced with one having a corresponding curvature radius. As a result, there has been a problem that much time and labor are required for the replacement work.

  According to the present invention, there is no need to replace the gripping means even when the radius of the torus is changed, and the gripping method of the torus that hardly forms a dent or the like in the torus during gripping. An object is to provide an apparatus.

    The purpose of this is to firstly insert the annular body into the ring body whose inner diameter is larger than that of the annular body, and to dispose the annular body in the circumferential direction so that both ends in the circumferential direction are locked. A step of moving a plurality of gripping means having a bendable gripping belt locked to a member inward in the radial direction in synchronization with the moving means, and pressing the gripping belt of each gripping means against the outer periphery of the torus, It can be achieved by a method of gripping an annular body including a step of gripping the annular body from the outside by gripping means while deforming the gripping belt along the outer periphery of the annular body.

  Second, a ring body having an inner diameter larger than that of the torus, a plurality of gripping means disposed in the ring body in a circumferential direction, and the gripping means when the torus is inserted into the ring body Are moved inward in the radial direction, and the gripping device includes a moving means configured to grip the torus from the outside by the gripping means. A gripping belt, and a locking member with which both ends in the circumferential direction of the gripping belt are locked, and when gripping the torus by the gripping means, the gripping belt is pressed against the outer periphery of the torus. This can be achieved by a holding device for a torus that is deformed along the outer periphery of the torus.

  In the inventions according to claims 1 and 2, each gripping means is composed of a bendable gripping belt and a locking member in which both ends in the circumferential direction of the gripping belt are locked. When the gripping belt of the gripping means is pressed against the outer periphery of the torus, the gripping belt follows and deforms along the outer periphery of the torus and comes into contact with the torus over a wide area. As a result, there is no need to replace the gripping means even if the radius of the torus is changed, and there is almost no formation of a dent or the like in the torus during gripping, improving the uniformity of the product tire. be able to.

According to the third aspect of the present invention, it is possible to provide a work space between the gripping belts, for example, a print work space for a tire thin wire, and it is easy even with an annular body having a long axial length. It can be gripped reliably.
Furthermore, if it comprises as described in Claim 4, it can hold | grip while rotating a torus, and, thereby, can eliminate the indentation of a grip.

Further, according to the fifth aspect of the present invention, when the radius of the torus differs depending on the axial position, for example, when the torus grips the outer periphery of the tread provided with the crown radius by the green tire. Since it can drive | work according to the peripheral speed (radius) of the site | part which the grip belt is contacting, lateral displacement of a grip belt can be suppressed.
Furthermore, if comprised as described in Claim 6, the lateral displacement of the above-mentioned holding | grip belt can be suppressed strongly, and the situation where a holding | grip belt remove | deviates from a roller can be prevented by this.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
In FIGS. 1, 2, and 3, 11 is a gripping device for gripping a green tire G containing a torus, here unvulcanized rubber, from the outside in the radial direction. This gripping device 11 is on a floor surface not shown. A base 12 that can move along the laid rail is provided, and the green tire G is conveyed from the tire forming drum to the next process while being gripped by the movement of the base 12. The base 12 is provided with an upright ring body 13 coaxial with the tire molding drum and having an inner diameter larger than the outer diameter of the green tire G.

  Reference numeral 16 denotes a plurality of, in this case, eight swing arms arranged equidistantly in the circumferential direction. The base ends of the swing arms 16 are rotatably connected to the ring body 13 via support pins 17. Accordingly, the swing arm 16 can swing in the radial direction around the support pin 17. Each oscillating arm 16 has a projecting portion 19 projecting substantially toward the central axis of the ring body 13 at its base end, and the projecting portion 19 extends in the projecting direction while penetrating in the axial direction. Each hole 20 is formed. Reference numeral 21 denotes a rotating ring having a ring shape coaxial with the ring body 13, and the outer periphery of the rotating ring 21 is slidably engaged with the inner periphery of the ring body 13. As a result, the rotating ring 21 is supported rotatably in the ring body 13 while maintaining the coaxial relationship.

  Reference numeral 25 denotes a plurality of connecting shafts (the same number as the swinging arm 16) that are fixed to the rotating ring 21 and extend in the axial direction. A roller follower 26 that is rotatably supported by these connecting shafts 25 is a base of the swinging arm 16. It is slidably inserted into the end, more specifically, into the long hole 20 of the protrusion 19. As a result, the base end portion (projecting portion 19) of the swing arm 16 is connected to the rotating ring 21 via the connecting shaft 25 and the roller follower 26. Reference numeral 28 denotes a cylinder supported on the outer periphery of the ring body 13 via a bracket 29. The tip of the piston rod 30 of the cylinder 28 is connected to the rotating ring 21 via an intermediate member 31.

  When this cylinder 28 is operated, a rotational driving force is applied to the rotating ring 21, and the rotating ring 21 rotates around the central axis while being supported by the ring body 13, but when the rotating ring 21 rotates in this way, A rocking force is applied to the rocking arm 16 via the connecting shaft 25 and the cam follower 26, and the rocking arm 16 rocks synchronously in the radial direction around the support pin 17. The rotating ring 21 and cylinder 28 described above as a whole have a gripping means (to be described later) connected to the distal end of the swing arm 16 by synchronously swinging the swing arm 16 in the radial direction around the base end. The moving means 32 is configured to move synchronously in the radial direction along the arc.

  35 is a plurality of eight gripping means arranged in the ring body 13 at equal distances in the circumferential direction, here the same number as the swing arm 16, each gripping means 35 has a holder body 36; The outer end portions in the radial direction of the holder main body 36 are connected to the tip end portions of the corresponding swing arms 16 via the connecting pins 37 so as to be able to swing. When the swing arm 16 is synchronously swung inward in the radial direction, the holder main body 36 is synchronously moved inward in the radial direction along the arc. By means, the circumferential center line is translated so as to always intersect the axis of the green tire G.

  Here, as such a restricting means, for example, the other side portion is fixed to one circumferential end portion of every other holder main body 36, and one side portion is arranged adjacent to one side of the holder main body 36. A restriction arm that overlaps the other circumferential end of the holder body 36 and a holder body 36 that is provided at the other circumferential end of the holder body 36 that is disposed adjacent to the one side and is disposed adjacent to the other side. A restricting member that restricts one side of the restricting arm so that the radial line passing through the midpoint and the center line of the restricting arm are perpendicular to each other regardless of the swing of the swing arm 16 (for example, the restricting arm rolls on both sides) 3 rollers in contact with each other).

  Further, a pair of support shafts 38, 39 extending in parallel with the central axis of the ring body 13 are attached to both ends in the radial direction at the inner end in the radial direction of the holder main body 36, respectively. A plurality of, in this case, six rollers 40 and 41 each having a coaxial relationship are rotatably supported via a bearing 42. The holder main body 36 and the support shafts 38 and 39 as a whole constitute a holder 43 that rotatably supports rollers 40 and 41 separated in the circumferential direction, and the holder 43 and the rollers 40 and 41 as a whole A locking member 44 is configured in which both ends in the circumferential direction of a gripping belt, which will be described later, are locked.

  The rollers 40 and 41 are divided into two groups of three, one group 45 being arranged on one side of the support shafts 38 and 39 in the axial direction, and the other group 46 being the support shafts 38 and 39. It is arranged on the other side in the axial direction. Here, in these groups 45 and 46, the rollers 40 and 41 are arranged close to each other, for example, at an interval of less than half the width of the gripping belt described later. 47 is a plurality of endless gripping belts (seamless belts) that can be bent (the same number as the rollers 40 and 41), and these gripping belts 47 are arranged in parallel extending in the circumferential direction, and the pair of rollers 40, By being wound around 41, both ends in the circumferential direction are locked to the rollers 40, 41.

  Then, after the aforementioned green tire G is inserted into the ring body 13, when the swing arm 16 swings inward in the radial direction by the operation of the cylinder 28, the gripping means 35 moves radially inward along the arc. When the gripping belt 47 of the gripping means 35 is pressed against the outer periphery of the green tire G by such synchronous movement, the gripping belt 47 is deformed following the outer periphery of the green tire G, and the green tire G Grip from outside with a large area. As a result, it is not necessary to replace the gripping means 35 even if the rim diameter (radius) or size of the green tire G is changed, and even if the green tire G contains soft unvulcanized rubber, At this time, there is almost no dent or the like formed in the gripping portion, and the uniformity of the product tire can be improved.

  Here, as described above, the locking member 44 is constituted by the holder 43 and the rollers 40 and 41 rotatably supported by the holder 43 and separated in the circumferential direction, and the grip belt 47 is constituted by an endless belt. When the grip belt 47 is looped between the rollers 40 and 41 so that both ends in the circumferential direction are locked to the rollers 40 and 41, the rollers 40 and 41 rotate and the grip belt 47 travels. Thus, the rotation of the green tire G is allowed, whereby the green tire G can be gripped while being rotated, and there is no indentation or the like at the time of gripping.

  The above-described green tire G is configured by, for example, installing a motor in any gripping means 35 and rotating and running the rollers 40 and 41 and the gripping belt 47 that are in contact with the green tire G by the motor. Alternatively, the ring body 13 supports a driving roller driven and rotated by a motor so as to be movable in the radial direction. The driving roller is moved inward in the radial direction until it contacts the green tire G, and then the driving roller is driven by the motor. It can be rotated by rotating.

  Further, as described above, the holder 43 supports a plurality of rollers 40 and 41 arranged close to each other while maintaining a coaxial relationship with each other, and is wound around the rollers 40 and 41 corresponding to the plurality of rollers 40 and 41. If a plurality of grip belts 47 are also provided, even if the radius of the green tire G varies depending on the axial position due to the crown radius provided on the outer periphery of the tread T, Since the vehicle can travel according to the peripheral speed (radius) of the green tire G, the lateral displacement of the grip belt 47 can be suppressed.

  Here, on the outer periphery of each of the rollers 40 and 41, a circumferential groove 51 extending continuously in the circumferential direction is formed in the central portion in the axial direction, while the inner surface of the grip belt 47 is formed in the central portion in the width direction. A protrusion 52 extending in the longitudinal direction is formed. The inner portion of the gripping belt 47, more specifically, the protrusion 52, is fitted into the circumferential groove 51 of the rollers 40 and 41. As a result, the lateral displacement of the gripping belt 47 as described above is strongly suppressed. Therefore, it is possible to prevent the gripping belt 47 from coming off the rollers 40 and 41.

  Further, at least at one position between the plurality of gripping belts 47 described above, the gripping belt 47 wound around the rollers 40 and 41 positioned in the axially innermost side of the group 45 and the axially innermost side of the group 46 are here. A gap 55 having a predetermined width, for example, 1/2 or more of the width of the gripping belt 47, is provided at only one position between the gripping belt 47 and the rollers 40 and 41 that are positioned. Here, when such a gap 55 is provided, it is possible to provide a working space between the gripping belts 47, for example, a printing work space for tire thin wires, and by increasing the number of gaps, the axial direction Even a long torus, such as a green case, can be easily and reliably gripped.

  58 is a tensioner whose base end portion is rotatably connected to the holder main body 36 of each gripping means 35, and a dancer roller 59 that is in rolling contact with the outer surface of the gripping belt 47 in the radial direction at the tip end portion of the tensioner 58. Is rotatably supported. Here, the tensioner 58 is urged to swing inward in the radial direction by a spring (not shown). As a result, when the gripping belt 47 is not in contact with the green tire G, The radially outer portion is pushed inward in the radial direction to be deformed into a V shape to remove the slack of the gripping belt 47 and to apply a certain tension to the gripping belt 47.

  On the other hand, when the gripping belt 47 comes into contact with the green tire G and its radially inner portion deforms in an arc shape along the outer periphery of the tread T, the dancer roller 59 is pushed outward in the radial direction, and the tensioner 58 opposes the spring. While swinging outward in the radial direction. The removal of the slack of the gripping belt 47 and the application of tension make it possible to move one of the support shafts 38 and 39 closer to and away from the other and to connect the one support shaft 38 and 39 to the other support shaft 38. , 39 can also be provided by providing a spring that urges away from 39.

Next, the operation of the embodiment will be described.
When the green tire G that has been molded is gripped by the gripping device 11 described above, first, the gripping device 11 is moved along the rail to a position surrounding the green tire G from the outside in the radial direction, and the green tire G is then ringed. Insert into the body 13 while maintaining the coaxial relationship. At this time, since the piston rod 30 of the cylinder 28 protrudes, each oscillating arm 16 oscillates radially outward, and all the gripping means 35 stop at the radially outermost position shown by the solid line in FIG. doing.

  Next, when the cylinder 28 is operated and the piston rod 30 is retracted, the rotating ring 21 rotates counterclockwise in FIG. 1, and the rotation of the rotating ring 21 is oscillated via the connecting shaft 25 and the roller follower 26. It is transmitted to the arm 16, more specifically, the projecting portion 19, and swings the swing arm 16 inward in the radial direction around the support pin 17. As a result, all the gripping means 35 move inward in the radial direction synchronously while drawing an arc, and the grip belt 47 wound around the rollers 40 and 41 belonging to the group 45 is aligned with the width direction of the outer periphery of the green tire G. The gripping belt 47 that is wound around the rollers 40 and 41 belonging to the group 46 comes into contact with the other side in the width direction of the outer periphery of the green tire G at the side.

  When the gripping belt 47 comes into contact with the outer periphery of the green tire G in this way, the radially inner portion of the gripping belt 47 is pressed against the outer periphery of the green tire G and forms an arc along the outer periphery of the green tire G. Following deformation. Thereby, the green tire G is gripped from the outside by a plurality of gripping means 35 separated in the circumferential direction. At this time, since the grip belt 47 is in contact with the green tire G over a wide area, the green tire G is soft. Even if the unvulcanized rubber is contained, there is almost no dent or scratch on the grip portion.

  Here, when the radially inner portion of the gripping belt 47 is deformed in an arc shape as described above, the dancer roller 59 is pushed outward in the radial direction, and the tensioner 58 swings radially outward against the spring. . As a result, the radially outer portion of the gripping belt 47 that has been V-shaped is stretched until it is close to a straight line, and the deformation of the gripping belt 47 into an arc shape is absorbed.

  Thereafter, the diameter of the forming drum is reduced, and the green tire G is transferred from the forming drum to the gripping device 11, and then the gripping device 11 is moved along the rail to convey the green tire G to the next process. At this time, since the grip belt 47 that grips the green tire G is wound around the rollers 40 and 41 rotatably supported by the holder 43, when a rotational driving force is applied from the motor to the green tire G, Even when the green tire G is gripped by the gripping means 35, the green tire G can rotate about its own central axis, thereby eliminating any indentation or the like during gripping.

  At this time, since there are a plurality of gripping belts 47 for gripping the green tire G and the inner portions (protrusions 52) are fitted into the circumferential grooves 51 of the rollers 40, 41, the radius of the green tire G However, even if the crown round provided on the outer periphery of the tread T varies depending on the position in the axial direction, the lateral displacement of the grip belt 47 can be strongly suppressed, and the grip belt 47 does not come off the rollers 40 and 41.

    In the above-described embodiment, the locking member 44 is composed of the holder 43 and the rollers 40, 41. However, in the present invention, the locking member is composed of a member having, for example, a substantially U shape. Further, both end portions in the circumferential direction of the gripping belt, which is an end, may be locked at both ends of the locking member. In the above-described embodiment, a plurality of pairs (six pairs) of rollers 40 and 41 are provided, and a plurality of (six) grip belts 47 having a narrow width are wound around the pair of rollers 40 and 41. However, in the present invention, a pair of rollers may be provided, and a wide flat belt may be hung around these rollers.

  Furthermore, in the above-described embodiment, the circumferential groove 51 is formed on the outer periphery of the rollers 40 and 41, and the protrusion 52 that is fitted into the circumferential groove 51 is provided on the inner side of the grip belt 47. In the invention, a V belt, a toothed belt, and a round belt are used as a gripping belt, and a pulley having a circumferential groove into which an inner portion of the V belt, the toothed belt, and the round belt is fitted is formed as a roller. You may make it use.

  The present invention can be applied to the industrial field in which an annular body such as a green case or a green tire is gripped from the outside.

It is a front view which shows one Example of this invention. It is an enlarged front view explaining the rocking | fluctuation state of a rocking | fluctuating arm. It is II sectional view taken on the line of FIG.

Explanation of symbols

11 ... Gripping device 13 ... Ring body
32 ... Moving means 35 ... Holding means
40, 41 ... Roller 43 ... Holder
44 ... Locking member 47 ... Gripping belt
51 ... Circumferential groove 55 ... Gap G ... Torus

Claims (6)

    A step of inserting the torus into the ring body having an inner diameter larger than that of the torus, and a bendable grip disposed in the ring body in the circumferential direction and having both circumferential ends locked by the locking members A step of moving a plurality of gripping means having a belt radially inward in synchronization with the moving means, and pressing the gripping belt of each gripping means against the outer periphery of the torus, and the gripping belt along the outer periphery of the torus And a step of gripping the torus from outside by the gripping means while deforming the torus.     A ring body having an inner diameter larger than that of the annular body, a plurality of gripping means disposed in the ring body in a circumferential direction, and the gripping means when the annular body is inserted into the ring body, In a torus gripping device comprising a moving means that moves radially inward and grips the torus from the outside by these gripping means, each gripping means is a bendable gripping belt that extends in the circumferential direction. And a locking member locked at both ends in the circumferential direction of the gripping belt, and when the gripping means grips the torus, the gripping belt is pressed against the outer periphery of the torus. An annular holding device characterized by being deformed along an outer periphery.     The annular gripping device according to claim 2, wherein a plurality of the gripping belts are arranged in parallel, and a gap having a predetermined width is provided at least at one position between the gripping belts.     The locking member includes a holder and a roller rotatably supported by the holder and spaced apart in the circumferential direction. The gripping belt includes an endless belt, and the gripping belt is looped between the rollers. 4. A toroidal gripping device according to claim 2 or 3, wherein both ends in the circumferential direction are engaged with rollers.     The circle according to claim 4, wherein the holder supports a plurality of rollers arranged close to each other while maintaining a coaxial relationship with each other, and a plurality of gripping belts are provided around the rollers corresponding to the plurality of rollers. Annular gripping device.     The annular gripping device according to claim 5, wherein a circumferential groove extending continuously in a circumferential direction is formed on an outer periphery of the roller, and an inner portion of a gripping belt is fitted into the circumferential groove.

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