JP5562470B1 - Method and apparatus for gripping annular body - Google Patents

Abstract

[PROBLEMS] To improve the efficiency easily and easily while preventing deterioration of the quality of an annular body (belt tread band) 17.
A grip body (32) is coupled together to an inner end portion of a long link piece (39) of a Scott Russell link mechanism and an inner end portion of a parallel link piece (47) constituting a parallel crank mechanism together with the long link piece (39). In addition, since the outer ends of the long and parallel link pieces 39 and 47 are integrally moved along the guide body 34 extending linearly in the tangential direction of the ring body 29, the grip body 32 has a Scott Russell link mechanism. Thus, it is possible to move largely along the radial line, and it is possible to move in parallel with the outer periphery of the annular body 17 by the parallel crank mechanism.
[Selection] Figure 2

Description

    The present invention relates to an annular body gripping method and apparatus for gripping an annular body such as a belt tread band from the outside.

    As conventional annular body gripping methods and apparatuses, for example, those described in the following Patent Documents 1 and 2 are known.

Japanese Utility Model Publication No. 7-017536 US Pat. No. 5,709,768

  The thing of the said patent document 1 is provided in the radial direction inner side of an annular ring body and a ring body, and is arrange | positioned away in the circumferential direction, and when moved to a radial inside, it is in the center part of a ring body. A plurality of gripping bodies for gripping the arranged annular body from the outside, and a plurality of moving means provided between the ring body and each gripping body and moving the gripping bodies in the radial direction in synchronization. Each moving means is installed on the ring body so as to extend parallel to the radial line, and is supported by each guide rail so as to be slidable. And a slider to which the grip body is attached, and a drive mechanism for moving the slider in the radial direction.

  However, in the gripping device as described in Patent Document 1, the amount of movement in the radial direction of the gripping body and the slider is limited to the width (circumferential distance) of the ring body, and must be a small value. When the diameter of the annular body to be gripped changes greatly, it is necessary to replace the grip body with one having a different thickness in the radial direction, which makes the work cumbersome and reduces the efficiency. There was a problem that the purchase cost of the grip body was high, and a storage place for it was also required. Although it may be possible to deal with this by increasing the width of the ring body, this is not practical because the entire gripping device is enlarged and interferes with surrounding equipment.

  In order to solve such a problem and to make the movement amount in the radial direction of the gripping body large, for example, each moving means is supported by the ring body so as to be swingable as described in Patent Document 2. In addition, the gripping body is rotatably connected to the inner end, a plurality of links spaced apart in the circumferential direction, one end is fixed to the other circumferential end of each gripping body, and the other side is It is slidably inserted into a slot formed at one circumferential end of an adjacent gripping body, and when the gripping body moves in a radial direction along an arc, the gripping body is substantially parallel to the outer periphery of the annular body. It has been proposed to have a rod to be moved and further provided with a drive mechanism for swinging the plurality of links in the same direction.

    However, in the gripping device as described in Patent Document 2, in order to translate all the gripping bodies in a state substantially parallel to the outer periphery of the annular body, when these gripping bodies are moved in the radial direction, While the rod is slidably contacted with the slot of the gripping body and moved in the longitudinal direction to forcibly change the posture of the gripping body, in order to smoothly move the rod and suppress wear, Lubricating oil supply is required for the slot. Then, when oil is supplied to the slot in this way, there is a problem that the lubricating oil falls from the slot and adheres to the annular body, which may deteriorate the quality of the annular body.

  An object of the present invention is to provide a method and an apparatus for gripping an annular body that can be easily and easily improved in efficiency while preventing deterioration of the quality of the annular body.

The purpose of this is as follows. First, an annular ring body is provided on the radially inner side of the ring body, arranged away from the circumferential direction, and grips the annular body from the outside when moved inward in the radial direction. A ring body at the center of the ring body provided with a plurality of grip bodies and a plurality of moving means provided between the ring body and each grip body and moving the grip body in the radial direction. Arranging the body, a guide body provided on the ring body and extending linearly in a tangential direction of the ring body, an outer end portion being movable along the guide body while being guided by the guide body, A Scott Russell link mechanism in which the long link piece of the Scott Russell link mechanism having the gripped body connected to the end portion, an outer end portion connected to the guide body, and an inner end portion connected to the longitudinal central portion of the long link. Short link piece and outside The part moves integrally with the outer end part of the long link piece, while the inner end part is connected to the gripping body, and is parallel to the long link piece and is equal in length to form a parallel crank mechanism together with the long link piece. The long link pieces and the outer end portions of the parallel link pieces of the moving means having parallel link pieces are connected to the outer ends of the long link pieces and the parallel link pieces together, and are movably supported by the guide body. a slider that is, the are supported by the ring member, the tip of the piston rod I by the driving mechanism is composed of a linked fluid cylinder to said slider, outside integrally short link piece along a guide body end and the outer end portion is connected to the guide body, that the inner end is connected to the longitudinal center portion of the parallel link piece, parallel short constituting the Scott Russell link mechanism by said parallel link piece By moving to close the outer end of the link piece, long link piece, the short link piece, parallel link piece, is swung so as to approach the parallel short link piece in a radial direction line, outside the annular member by grippers Can be achieved by an annular body gripping method including a step of gripping at multiple locations.

Second, an annular ring body and an annular body provided at the inner side in the radial direction of the ring body and spaced apart from each other in the circumferential direction are arranged at the center of the ring body when moved inward in the radial direction. In an annular body gripping device comprising a plurality of gripping bodies gripped from the outside, and a plurality of moving means provided between the ring body and each gripping body to move the gripping body in the radial direction, The moving means is provided in the ring body and extends linearly in a tangential direction of the ring body, and the outer end portion is movable along the guide body while being guided by the guide body, and is moved to the inner end portion. The long link piece of the Scott Russell link mechanism to which the grip body is connected, the short end of the Scott Russell link mechanism in which the outer end portion is connected to the guide body, and the inner end portion is connected to the longitudinal center of the long link piece. Link piece and outer end A parallel link piece that moves integrally with the outer end portion of the long link and whose inner end portion is connected to the gripper and is parallel to the long link piece and is equal in length to form a parallel crank mechanism with the long link piece. Further, the outer end portions of the long link piece and the parallel link piece are connected together, a slider supported movably on the guide body, and a tip end of the piston rod supported by the ring body. the slider is composed of a connecting fluid cylinders, each outer end portion of the long link piece and parallel link piece moving means along the guide member to provide a driving mechanism for moving in the same direction integrally Rutotomoni, outer A parallel short link piece having an end portion connected to the guide body and an inner end portion connected to the center portion in the longitudinal direction of the parallel link piece is further provided. The annular body of the gripping device which is adapted to configure the Rurinku mechanism can be achieved.

  In the present invention, the gripping body is coupled together with the inner end portion of the long link piece of the Scott Russell link mechanism and the inner end portion of the parallel link piece constituting the parallel crank mechanism together with the long link piece. Since the outer ends of the pieces and the parallel link pieces are integrally moved along the guide body extending linearly in the tangential direction of the ring body, the grip body is substantially along the radial line by the Scott Russell link mechanism. Therefore, even if the movement amount is large, it is possible to move without any problem. As a result, even if the diameter of the annular body is changed, it is not necessary to replace the gripping body, which makes the work easier and easier. Efficiency can be improved. Moreover, since the gripping body can be translated in a state substantially parallel to the outer periphery of the annular body by the parallel crank mechanism, it is not necessary to supply lubricating oil, and as a result, the quality of the annular body is reduced due to the adhesion of the lubricating oil. It can also be effectively prevented.

Further, since the swing force is to be transmitted through short link pieces parallel to the flat ascending link piece, Scott Russell link mechanism, improved durability with the operation of the parallel crank mechanism becomes smooth, furthermore, easy single and Although the structure is inexpensive, the apparatus can be made compact because the slider fits in the ring body. According to the third aspect of the present invention, the backlash at the connecting portion between the long link piece, the parallel link piece and the slider, and between the long link piece, the parallel link piece and the gripper can be reduced. It is possible to effectively suppress the durability while improving the durability.

It is a schematic front view which shows Embodiment 1 of this invention. It is a partially broken side view of a holding device. It is a side view of a moving means vicinity. It is the II arrow directional view of FIG. 3 where a part was fractured | ruptured. It is a side view of the drive mechanism vicinity.

Embodiment 1 of the present invention will be described below with reference to the drawings.
1 and 2, 11 is a tire molding machine for molding a green tire. This tire molding machine 11 is supported by a drive unit 13 installed on the floor surface 12 and cantilevered by the drive unit 13. A cylindrical main body 14 comprising a horizontal main shaft 14 that is rotated by applying a driving force from the portion 13, and a carcass layer that is provided at the front end portion of the main shaft 14 and whose axial ends are folded around the bead. A cylindrical drum formed by sequentially winding a belt layer and a tread around the outer periphery of the molding drum 16 supported by the green case 15 and provided on the main shaft 14 between the molding drum 16 and the drive unit 13. A belt drum 18 that supports a belt-tread band 17 as an annular body to be supported is provided.

  Reference numeral 21 denotes a pair of guide rails laid on the floor surface 12 immediately below the main shaft 14 and extending in parallel with the main shaft 14. The guide rails 21 include a plurality of slide bearings 23 attached to the lower surface of the base 22. Are slidably engaged. The base 22 moves along the guide rail 21 while being guided by the guide rail 21 when a driving force is applied from a drive mechanism (not shown) such as a cylinder, a screw mechanism, and a rack and pinion mechanism ( Reciprocating). A gripping device 24 is mounted on the base 22, and the gripping device 24 can grip the belt tread band 17 as the annular body at a plurality of locations from the outside in the radial direction. When the gripping device 24 grips the belt tread band 17 from the outside and the base 22 is moved by the drive mechanism, the belt tread band 17 overlaps the forming drum 16 while being gripped by the gripping device 24. It is conveyed axially to the position.

  2, 3 and 4, the gripping device 24 has a pair of parallel support rings 27 whose lower ends are fixed to the base 22, and these support rings 27 are coaxial with the main shaft 14. Reference numeral 28 denotes a plurality of, in this case, eleven brackets installed between the support rings 27 and arranged at equal distances in the circumferential direction, and these brackets 28 are fixed at the opposite inner surfaces of the support ring 27, These support rings 27 are connected to each other. The pair of support rings 27 and the plurality of brackets 28 described above constitute an annular ring body 29 that is coaxial with the main shaft 14 as a whole. 32 is a grip body made of a plurality of (same as the number of brackets 28) rigid bodies having a substantially rectangular plate shape provided on the inner side in the radial direction of the ring body 29. These grip bodies 32 are arranged in the circumferential direction on the same circle. The inner circumference of the belt tread band 17 is an arc surface having substantially the same radius of curvature as that of the belt tread band 17. When these gripping bodies 32 move inward in the radial direction, the belt tread band 17 disposed at the center of the ring body 29 can be gripped from the outside.

  Reference numeral 33 denotes a plurality of (the same number as the gripping bodies 32) moving means provided between the ring body 29 and each gripping body 32, and each moving means 33 is a guide fixed to the bracket 28 of the ring body 29. Each guide body 34 extends linearly in the tangential direction of the ring body 29. Here, extending in the tangential direction of the ring body 29 does not extend in the radial direction of the ring body 29 but rather extends in the tangential direction. On the other hand, it may be inclined at less than 45 degrees and may extend parallel to a tangent to the ring body 29. In this embodiment, the guide body 34 is inclined at a predetermined small angle with respect to the tangent to the ring body 29. As a result, the guide body 34 is moved from one end in the longitudinal direction toward the other end in the longitudinal direction. Gradually approaching the circumference of 29

  A guide rail 36 extending continuously in the longitudinal direction of the guide body 34 is provided at the longitudinal center and the other longitudinal end of each guide body 34, and a slider 37 is slidably engaged with these guide rails 36. Match. Since the slider 37 is thus supported by the guide body 34, the slider 37 can move linearly in the longitudinal direction of the guide body 34, that is, in the tangential direction of the ring body 29, while being guided by the guide rail 36. it can. In the present invention, each guide body 34 may be provided with a plurality of guide rods extending continuously in the longitudinal direction of the guide body 34, and a slider may be slidably engaged with these guide rods. .

  39 is a plurality of long link pieces having a strip-like shape whose outer end portions in the radial direction are rotatably connected to the sliders 37 via pins 40. These long link pieces 39 are the central axes of the pins 40. Can be swung around. As a result, the outer end portion of the long link piece 39 can move along the guide body 34 integrally with the slider 37 while being guided by the guide body 34 (guide rail 36). In addition, the grip bodies 32 are rotatably connected to the inner ends of the long link pieces 39 via pins 41, respectively. Reference numeral 42 denotes a plurality of short link pieces made of a pair of link members whose outer ends in the radial direction are rotatably connected to the respective guide bodies 34 via the pins 43. The inner ends in the radial direction of the short link pieces 42 Is pivotally connected to the long link piece 39 via a pin 44 provided at the center in the longitudinal direction of the long link piece 39, that is, at the midpoint between the central axes of the pins 40 and 41.

  Here, the central axes of the pins 40, 41, 44 are all located on the same straight line, and the straight line connecting the central axes of the pins 40 and 43 is the moving direction of the pin 40, that is, the extension of the guide rail 36. Parallel to the direction. Further, the distance between the central axes of the pins 40 and 44, the distance between the central axes of the pins 41 and 44, and the distance between the central axes of the pins 43 and 44 are all equal. As a result, the long link piece 39 and the short link piece 42 constitute a known Scott Russell link mechanism. At this time, as described above, the distance between the central axes of the pins 40 and 44 and the centers of the pins 44 and 41 are set. Since the distance between the shafts is equal, that is, the pin 44 is located in the longitudinal center of the long link piece 39, the outer end portion (pin 40) of the long link piece 39 and the slider 37 are guided by the guide rail 36. However, when the long and short link pieces 39 and 42 move in the opposite directions around the pins 40 and 43 by moving toward and away from the outer end portion (pin 43) of the short link piece 42, the pin 41 is gripped. It moves without a problem even if it is a large amount of movement along a direction orthogonal to the guide rail 36 integrally with 32, here, the radial line L.

  47 is a plurality of parallel link pieces having substantially the same shape as the long link piece 39, and the radially outer ends of the parallel link pieces 47 are rotatably connected to the sliders 37 via pins 48. Thus, the parallel link piece 47 can swing around the central axis of the pin 48. As a result, the outer end portion of the parallel link piece 47 moves along the guide body 34 integrally with the outer end portions of the slider 37 and the long link piece 39 while being guided by the guide body 34 (guide rail 36). be able to. The central axis of the pin 48 is arranged on a straight line that passes through the central axis of the pin 40 and extends in parallel with the guide rail 36 and is separated from the central axis of the pin 40 by a predetermined distance.

  In addition, the grip body 32 is rotatably connected to the radially inner end of the parallel link piece 47 via a pin 49. The central axis of the pin 49 and the central axis of the pin 41 are The straight line connecting the pins 40 and 48 extends in parallel to the straight line connecting the central axes of the pins 40 and 48 (guide rail 36), and the distance between the central axes of the pins 41 and 49 is between the central axes of the pins 40 and 48. It is the same as the distance. As a result, the parallel link piece 47 is parallel to the long link piece 39 and is equal in length to the long link piece 39, and constitutes a parallel crank mechanism together with the long link piece 39. As a result, when the long link piece 39 and the parallel link piece 47 swing around the pins 40 and 48, the gripping body 32 can move in parallel while maintaining a state substantially parallel to the outer periphery of the belt tread band 17. it can.

  Reference numeral 50 denotes a plurality of parallel short link pieces made of a pair of link members whose outer ends in the radial direction are rotatably connected to the guide bodies 34 via pins 51. The end is rotatably connected to the parallel link piece 47 via a pin 52 provided at the center in the longitudinal direction of the parallel link piece 47, that is, at the midpoint between the central axes of the pins 48 and 49. Here, the length of the parallel short link piece 50 is the same as the length of the short link piece 42, and the positional relationship of the central axes of the pins 51 and 52 is the same as the positional relationship of the central axes of the pins 43 and 44. As a result, the parallel link piece 47 and the parallel short link piece 50 also constitute a Scott Russell link mechanism in the same manner as the long and short link pieces 39 and 42.

As a result, the long link piece 39, the outer end portion of the parallel link piece 47 (pins 40, 48) and the slider 37 are guided by the guide rail 36, while the outer end portion of the short link piece 42 and the parallel short link piece 50 (pin 43). 51), the long and short link pieces 39 and 42 and the parallel link piece 47 and the parallel short link piece 50 swing around the pins 40 and 43 and the pins 48 and 51, respectively. , 49 move along the direction orthogonal to the guide rail 36 integrally with the gripping body 32, here, even along a radial line L, even without a large amount of movement . Outer end portion as in the embodiment of this is connected to the guide body 34, parallel short link piece 50 which is connected to the longitudinal center of the parallel link piece 47 provided with an inner end portion, parallel to the parallel link piece 47 When the Scott Russell link mechanism is configured with the short link piece 50, the swinging force is transmitted to the parallel link piece 47 through the parallel short link piece 50. Therefore, the Scott Russell link mechanism and the parallel crank mechanism The operation is smooth and the durability is improved, and the Scott Russell link mechanism and the parallel crank mechanism can be operated without any problem by the parallel short link piece 50 even when the short link piece 42 is broken.

  The linearly extending guide body 34 described above, and a long link piece 39 in which the outer end portion is movable along the guide body 34 while being guided by the guide body 34, and the grip body 32 is connected to the inner end portion. A short link piece 42 whose outer end portion is connected to the guide body 34, an inner end portion is connected to a central portion in the longitudinal direction of the long link piece 39, and an outer end portion is an outer end portion of the long link piece 39. And the parallel link piece 47 which is connected to the grip body 32 and is parallel to the long link piece 39 and has the same length as the whole, the ring body 29 and each grip body 32 as a whole. And a plurality of moving means 33 (the same number as the gripping bodies 32) that move the gripping bodies 32 in the radial direction.

  In the above-described embodiment, the distance between the central axes of the pins 40 and 44, the distance between the central axes of the pins 41 and 44, the distance between the central axes of the pins 43 and 44, the distance between the central axes of the pins 48 and 52, the pin The distance between the central axes of 49 and 52 and the distance between the central axes of the pins 51 and 52 are all the same, but in the present invention, the pins 44 and 52 are arranged from the longitudinal center of the long link piece 39 and the parallel link piece 47, etc. Shifted in the same direction by the distance, placed in the longitudinal center of the long link piece 39 and the parallel link piece 47, the ratio of the center distance of the pins 40, 44 to the distance between the center axes of the pins 43, 44, and the pins 40, The ratio of the distance between the central axes of the pins 41 and 44 to the distance between the central axes of 44 may be the same. In this case, the movement of the outer end portion of the long link piece 39 causes the inner end portion of the long link piece 39 to move along a straight line that approximates the radial line L. In this case, the positional relationship of the central axes of the pins 48, 49, 51, 52 is the same as the positional relationship of the central axes of the pins 40, 41, 43, 44.

  Here, it is possible to omit the Scott Russell link mechanism and use only a parallel crank mechanism as the moving means described above, but in this case, the long link piece 39, the inner end of the parallel link piece 47 and the gripping body 32 are It moves inward in the radial direction while drawing an arc. Then, when the gripping body 32 moves along the aforementioned arc to grip the belt tread band 17, the circumferential end of the gripping body 32 on the side approaching the belt tread band 17 first becomes the belt tread band. There is a possibility that the belt tread band 17 may be damaged by coming into contact with the outer periphery of the belt 17. For this reason, in this embodiment, both the Scott Russell link mechanism and the parallel crank mechanism are essential as the moving means 33.

  A pin 40 is surrounded from the outside between one side in the width direction at the radially outer end of each long link piece 39 and one side in the width direction of the slider 37 facing the long link piece 39, and An outer spring 55 is provided to apply a biasing force to the long link piece 39 and press it against the other end portion in the width direction of the slider 37, while at the radially inner end portion of the long link piece 39, Between the width direction other side part of the holding body 32 facing the long link piece 39, the pin 41 is surrounded from the outside, and an urging force is applied to the long link piece 39 to end one end of the holding body 32 in the width direction. An inner spring 56 that presses against the part is interposed. As a result, the outer end portion and the inner end portion of the long link piece 39 are pressed against the slider 37 and the grip body 32 by the outer and inner springs 55 and 56, respectively. The backlash which arises in the connection part of the long link piece 39 and the holding body 32 is suppressed together.

  Here, for example, both the outer and inner springs for suppressing backlash as described above can be arranged only on one side in the width direction of the long link piece 39. Since it is necessary to apply a large compressive force (pre-pressure) in advance, when the gripping device 24 starts to move along the guide rail 21 and ends the movement, a large compressive force is applied to the outer and inner springs. May be repeatedly added and the outer and inner springs may be damaged.

  However, in this embodiment, as described above, one of the outer and inner springs for suppressing backlash, here the outer spring 55 is placed on one side in the width direction of the long link piece 39, and the other, Then, since the inner spring 56 is arranged on the other side in the width direction of the long link piece 39, the preload applied to the outer and inner springs 55, 56 can be greatly reduced. The durability of the outer and inner springs 55 and 56 can be easily improved while effectively suppressing the above. In the present invention, contrary to the above, the inner spring that is one of the springs is on one side in the width direction of the long link piece 39, and the outer spring that is the other spring is the other side in the width direction of the long link piece 39. You may make it arrange | position to.

  In this embodiment, although not shown, an outer spring is interposed between the outer end of the parallel link piece 47 and the slider 37, and the inner end of the parallel link piece 47 and the gripping body 32 An inner spring is interposed between the two. These outer springs are arranged on the other side in the width direction of the parallel link piece 47 contrary to the above, and the inner springs are arranged on one side in the width direction of the parallel link piece 47 contrary to the foregoing. In the present invention, the outer spring may be arranged on one side in the width direction of the parallel link piece 47, and the inner spring may be arranged on the other side in the width direction of the parallel link piece 47. Further, the outer and inner springs may be provided only on either the long link piece 39 or the parallel link piece 47. In this embodiment, between the long and short link pieces 39 and 42, the parallel link piece 47, the parallel short link piece 50 and the pins 40, 41, 43, 44, 48, 49, 51 and 52, In addition, rolling bearings with low wear risk are installed.

  2, 4, 4, and 5, 60 is a transmission ring that is disposed on the axially outer side of the ring body 29 and is coaxial with the ring body 29, and the transmission ring 60 includes a plurality of (long link pieces 39) extending in the radial direction. The same number of slits 61 are formed at equal distances in the circumferential direction. Reference numeral 62 denotes a plurality of (the same number of slits 61) through-holes formed in the support ring 27 on the side close to the transmission ring 60. These elongated holes 62 are formed on the guide rail 36 on the radially inner side of the guide rail 36. It extends parallel to. Reference numeral 63 denotes a plurality of transmission rods (as many as the long holes 62) whose axial center passes through each of the long holes 62. One end of each of the transmission rods 63 is fixed to each slider 37 and provided at the other end. The follower 64 is inserted into the corresponding slit 61.

  Reference numeral 67 denotes a fluid cylinder supported on the outer periphery of the ring body 29 so as to be swingable. The tip of the piston rod 68 of the fluid cylinder 67 is connected to the transmission ring 60 via a bracket 69. As a result, when the fluid cylinder 67 is actuated and the piston rod 68 protrudes or retracts, the slider 37 and the outer ends of the long link piece 39 and the parallel link piece 47 are integrally formed in the same direction along the guide rail 36. As a result, the long link piece 39, the parallel link piece 47, the short link piece 42, and the parallel short link piece 50 swing, and the gripping body 32 moves in the radial direction in synchronization. The outer end portions of the long link piece 39 and the parallel link piece 47 are coupled together, and the slider 37 is movably supported by the guide body 34, and is supported by the ring body 29. The fluid cylinder 67 connected to the slider 37 via the bracket 69, the transmission ring 60, and the transmission rod 63 as a whole, the outer end portions of the long link piece 39 and the parallel link piece 47 of the moving means 33 to the guide body 34. A drive mechanism 70 is configured to move integrally in the same direction along.

In this way, if the drive mechanism 70 is composed of the slider 37 and the fluid cylinder 67 in which the piston rod 68 is connected to the slider 37 via the bracket 69, the transmission ring 60, and the transmission rod 63, the structure is simple and inexpensive. However, since the slider 37 is accommodated in the ring body 29, the apparatus can be made compact. Incidentally, before SL respectively a drive mechanism moving means 33, the gripper 32 may be moved individually.

  Further, in the present invention, in addition to the gripping body 32, the moving means 33, and the driving mechanism 70 described above, the gripping body, the moving means, and the driving mechanism having the same configuration as the gripping body 32, the moving means 33, and the driving mechanism 70 are connected to the ring. In addition to the additional installation away from the body 29 in the axial direction, the gripping body, the moving means, the drive mechanism and the gripping body 32, the moving means 33, and the driving mechanism 70 are arranged in the circumferential direction, for example, an angle between adjacent gripping bodies 32 The belt tread band 17 can be gripped from the outside at a larger number of locations, and the gripping is stabilized.

  Further, the number of moving means can be increased by omitting the parallel link pieces 47 and the parallel short link pieces 50 from each moving means 33 described above, but in this case, the gripping body is not substantially flat, A rod-shaped rotatable rod. If the gripping body is a cylindrical rod in this way, there is no arc-shaped gripping surface, so there is no need for parallel movement by the parallel crank mechanism, and the parallel link piece 47 and the parallel short link piece 50 are omitted as described above. It becomes possible to do. If a plurality of such moving means and drive mechanisms are provided in the axial direction of the ring body 29 in the same manner as described above, the number of grips on the annular body can be further increased. In this case, the high-order region component of RFV of the product tire increases. However, since such a high-order region component hardly affects the performance of the tire, the tire quality is hardly deteriorated.

Next, the operation of the first embodiment will be described.
Now, a cylindrical green case 15 is supported around the forming drum 16, while a belt tread band 17 as an annular body is supported around the band drum 18, and the gripping device 24 includes the drive unit 13. And a standby position between the drum drum 18 and the band drum 18. At this time, since the piston rod 68 of the fluid cylinder 67 protrudes to the stroke end, the outer end of the slider 37 and the long link piece 39 and the parallel link piece 47 receives a driving force from the transmission ring 60 and the transmission rod 63, As shown in phantom lines in FIG. 3, the short link piece 42 and the parallel short link piece 50 are moved integrally so as to be separated from the outer end portion. As a result, the long link piece 39 and the parallel link piece 47 are The short link piece 42 and the parallel short link piece 50 are swung around the pins 48 and 51 so that the inner end portion approaches the ring body 29, centering on 43. As a result, the gripping body 32 moves to the radially outer limit along the radial line L and stops.

  Next, the gripping device 24 is overlapped with the belt tread band 17 by the driving mechanism until the gripping device 24 surrounds the band drum 18 (belt tread band 17) from the outside in the radial direction along the guide rail 21. The belt / tread band 17 is moved to the center position of the ring body 29. Next, when the fluid cylinder 67 of the drive mechanism 70 is operated to retract the piston rod 68, the transmission ring 60 rotates. The rotation of the transmission ring 60 is transmitted through the transmission rod 63 to the slider 37 of each moving means 33. Accordingly, the outer ends of the slider 37, the long link piece 39, and the parallel link piece 47 are guided by the guide body 34 (guide rail 36), and the outer ends of the short link piece 42 and the parallel short link piece 50 are transmitted. It moves integrally to approach the part. At this time, since the guide body 34 (guide rail 36) and the long hole 62 are inclined at a predetermined angle with respect to the tangent to the ring body 29, the transmission rod 63 also moves in the radial direction. The movement of 63 in the radial direction is allowed without any problem because the transmission rod 63 is inserted into the slit 61 extending in the radial direction formed in the transmission ring 60, and power transmission is performed reliably.

  When the slider 37, the long link piece 39, and the outer end of the parallel link piece 47 are moved closer to the outer end of the short link piece 42 and the parallel short link piece 50 as described above, The link piece 47 and the short link piece 42 and the parallel short link piece 50 are swung in the opposite directions around the pins 40 and 48 and the pins 43 and 51 so as to approach the radial line L. -While maintaining a state substantially parallel to the outer periphery of the tread band 17, it moves in parallel along the radial line L in synchronization with the radially inner side. When the inner periphery of all the grip bodies 32 abuts on the outer periphery of the belt tread band 17 and the belt tread band 17 is gripped from the outside at a plurality of locations by the grip device 24 (all grip bodies 32), The operation of the fluid cylinder 67 is stopped, the band drum 18 is reduced in diameter, and the belt tread band 17 is transferred from the band drum 18 to the gripping device 24. The operation stop timing of the fluid cylinder 67 changes corresponding to the change in the diameter of the belt tread band 17.

  When the gripping device 24 grips the belt tread band 17 as described above, a pressure fluid, for example, air is introduced into the green case 15 while the beads of the green case 15 are brought close to each other in the forming drum 16. The green case 15 is bulged and deformed into a circular arc shape in cross section. At this time, the gripping device 24 gripping the base 22 and the belt tread band 17 is moved by the drive mechanism to a position surrounding the axial center of the molding drum 16 from the outside, and is gripped by the gripping device 24. The belt tread band 17 is crimped to the outside of the central portion of the green case 15 in the axial direction. Thereby, a green tire is formed. Thereafter, the driving mechanism 70 and the moving means 33 of the gripping device 24 are operated to return the gripping body 32 to the initial radius outer limit, and the gripping device 24 is returned to the initial standby position by the driving mechanism. Thereafter, the diameter of the molding drum 16 is reduced, and a molded green tire is taken out from the molding drum 16 by a loader (not shown) and conveyed to a vulcanizer.

  In this embodiment, the gripping body 32 is coupled to the inner end of the long link piece 39 of the Scott Russell link mechanism and the inner end of the parallel link piece 47 that constitutes the parallel crank mechanism together with the long link piece 39. Further, the outer ends of the long link piece 39 and the parallel link piece 47 are integrally moved along the guide body 34 extending linearly in the tangential direction of the ring body 29. With the Scott Russell link mechanism, it is possible to move without any problem even with a large amount of movement along the radial line. As a result, even if the diameter of the belt tread band 17 is changed, the gripping body The replacement work of 32 becomes unnecessary, the work is simplified and the efficiency can be easily improved. Moreover, since the gripping body 32 can be translated in a state substantially parallel to the outer periphery of the belt tread band 17 by the parallel crank mechanism, it is not necessary to supply lubricating oil. It is also possible to effectively prevent quality deterioration of the tread band 17.

    In the above-described embodiment, the belt tread band 17 is an annular body. However, in the present invention, a cylindrical carcass band composed of a carcass layer, and a carcass layer in which both axial ends are folded around a bead. A cylindrical green case made of, etc., a molded green tire, a vulcanized tire, an annular bead or the like may be formed into an annular body and held from the outside. Here, when the annular body is a soft carcass band, a suction pad that sucks and holds the carcass band from the outside by using a vacuum as a gripping body may be used.

  The present invention can be applied to the industrial field in which an annular body such as a belt tread band is gripped from the outside.

17… annular body 24… gripping device
29 ... Ring body 32 ... Holding body
33 ... Moving means 34 ... Guide body
37… Slider 39… Long link piece
42 ... Short link piece 47 ... Parallel link piece
50 ... Parallel short link piece 55 ... Outer spring
56… Inner spring 67… Fluid cylinder
68 ... Piston rod 70 ... Drive mechanism

Claims (3)

An annular ring body, a plurality of grip bodies which are provided radially inward of the ring body, are spaced apart in the circumferential direction, and grip the annular body from the outside when moved inward in the radial direction; and the ring body A ring body at the center of the ring body of the gripping device provided between the grip body and a plurality of moving means for moving the grip body in the radial direction. A guide body that extends linearly in a tangential direction of the ring body, and an outer end portion that is movable along the guide body while being guided by the guide body, and the grip body is connected to an inner end portion. The long link piece of the Scott Russell link mechanism, the outer end portion is connected to the guide body, the inner end portion is connected to the longitudinal center of the long link, the short link piece of the Scott Russell link mechanism, and the outer end portion is The outer end of the long link piece Each of the moving means having an inner end connected to the gripping body, and a parallel link piece that is parallel to the long link piece and is equal in length to form a parallel crank mechanism together with the long link piece. The outer ends of the long link piece and the parallel link piece are connected to the outer end of the long link piece and the parallel link piece, and are supported by the ring body and a slider supported so as to be movable by the guide body. is, the tip of the piston rod I by the driving mechanism is composed of a linked fluid cylinder on the slider, the outer end portion of the integrally short link piece along the guide member, and the outer end guide is connected to the body, that the inner end portion is connected to the longitudinal center portion of the parallel link pieces, close to the outer end of the parallel short link pieces constituting the Scott Russell link mechanism by said parallel link piece By cormorants movement, long link piece, the short link piece, parallel link piece, parallel short link piece is swung so as to approach the radial line, the gripping member and a step of grasping at a plurality of positions of the annular body from the outside An annular body gripping method characterized by comprising: Annular ring body, provided on the inner side in the radial direction of the ring body, spaced apart in the circumferential direction, and grips the annular body disposed at the center of the ring body from the outside when moved inward in the radial direction In the annular gripping device provided with a plurality of gripping bodies and a plurality of moving means provided between the ring body and each gripping body and moving the gripping body in the radial direction, each moving means includes: A guide body that is provided on the ring body and extends linearly in a tangential direction of the ring body; and an outer end portion that is movable along the guide body while being guided by the guide body; The long link piece of the connected Scott Russell link mechanism, the outer end portion is connected to the guide body, and the inner end portion is connected to the longitudinal center portion of the long link piece, the short link piece of the Scott Russell link mechanism, The outer end is the length And a parallel link piece that is connected to the gripping body and is parallel to the long link piece and is equal in length to form a parallel crank mechanism together with the long link piece. And an outer end portion of each of the long link piece and the parallel link piece is coupled together, and is slidably supported by the guide body, and supported by the ring body, and a tip end of the piston rod is the slider. a is composed of a linked fluid cylinder is provided with a driving mechanism for moving in the same direction integrally along the guide body outer end portion of the long link piece and the parallel link pieces of each mobile unit Rutotomoni, the outer end portion Is further provided with a parallel short link piece whose inner end is connected to the longitudinal central portion of the parallel link piece, and the parallel link piece and the parallel short link piece comprise Scott Russelllin. Annulus of the gripping device being characterized in that so as to constitute the mechanism. An outer spring is provided between the outer end of at least one of the long link piece and the parallel link piece and the slider, and an urging force is applied to the link piece to press it against the slider. An inner spring is provided between the inner end of one of the link pieces and the gripping body to apply a biasing force to the link piece and press it against the gripping body, and either one of the outer spring or the inner spring is inserted. The annular body gripping device according to claim 2 , wherein the other side of the link piece is disposed on the other side in the width direction of the link piece.

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