JP5567406B2 - Conveyor device for tire components - Google Patents

Description

  The present invention relates to a tire molding material (top tread), a molded raw tire, and the like (hereinafter collectively referred to as “tire constituent members”) that are affixed to a molding drum in a tire manufacturing process, more specifically, a raw tire manufacturing process. ).

  As a conventional tire component conveying device, for example, Patent Document 1 discloses a device that moves a plurality of segments that hold a tire component from the outer periphery in a radial direction by a cam mechanism. Japanese Patent Application Laid-Open No. H10-228667 discloses a cylinder provided for each segment in place of the cam mechanism, and each segment is moved in the radial direction by an advance / retreat operation of a piston rod of the cylinder.

JP 61-127377 A Japanese Patent Laid-Open No. 52-80377

  However, in the tire component conveying apparatus as described above, the cam mechanism or the cylinder can move the segment only a certain distance in the radial direction, that is, the operating range of the cam mechanism or the cylinder is the segment. Therefore, when changing the size of a tire to be produced, it must be replaced with a segment corresponding to the outer diameter of the tire, which requires a long time to change the size and increases the cost of the device. Was inevitable. Further, since the cam mechanism and the cylinder have a relatively small operating range, it is difficult to deal with a wide range of tire sizes without increasing the size of the entire apparatus.

  Therefore, the present invention provides a tire component conveying device that supports a wide range of tire sizes without having to change segments every time the size of a tire to be produced is changed, and without increasing the overall size of the device. For that purpose.

In order to solve the above-described problems, a tire constituent member transport device according to the present invention is a tire base member transport device that transports an annular tire constituent member while being held from the outer periphery. A pair of annular support members, a plurality of segments arranged in the circumferential direction on the inner peripheral side of the support member and capable of holding the tire constituent member from the outer periphery, and a pair connecting the support member and the segments. And a pair of parallel second links which are arranged crossing the first link and which connect the support member and the segments are pivotally connected to each other. , by mutual rotation of the first and second links and a link mechanism for synchronously moving the segments radially, the supporting member is opposed in the axial direction of the tire component member And a first ring and a second ring that are rotatable in opposite directions to each other, and one of the pair of first links is circumferentially connected to the first ring at one outer end in the radial direction. The second link is slidably connected and the other is pivotally connected to the second ring at the outer end in the radial direction. One of the pair of second links is the first at the outer end in the radial direction. The ring is pivotally connected to one ring, and the other is connected to the second ring so as to be slidable in the circumferential direction at the outer end in the radial direction .
According to such a component conveying apparatus, the segment is moved in the radial direction by a foldable (pantograph) link mechanism in which the first link and the second link are pivotally connected to each other. From the above, it is possible to increase the operating range without increasing the size of the entire device, and to handle various sizes of tires, without having to replace the segments each time the tire size to be held is changed. It is possible to hold tire constituent members of various sizes as compared with the conventional conveying device. Further, according to this, the segment can be moved in the radial direction only by relatively rotating the first ring and the second ring of the support member, so that the apparatus is simple and can be reduced in weight.

  In the tire component conveying device according to the present invention, it is preferable to include a drive unit that rotates the first ring and the second ring in directions opposite to each other. The two rings can be automatically rotated relative to each other.

  Furthermore, in the tire component conveying apparatus according to the present invention, the drive unit preferably includes a servo motor, and according to this, the relative rotation of the first ring and the second ring is advantageously controlled. In other words, it is possible to feedback-control the extension position, torque, moving speed, etc. of the link mechanism, and it is possible to change the size of the tire to be produced in a shorter time, and the tire components in the segment By limiting the torque when gripping the tire, deformation of the tire constituent member can be prevented and the quality of the product tire can be improved.

  Moreover, in the tire component conveying device according to the present invention, the segment has a guide groove that slidably supports inner ends in the radial direction of the first link and the second link, The guide groove has an arc shape having a radius from a pivot connection position of the first link and the second link to a radially inner end of the first link and the second link, and is directed radially inward. It is preferable that the first and second links of the link mechanism are mutually rotated and the segments are prevented from shifting in the circumferential direction. Thus, the tire constituent member can be reliably and uniformly held, and the movement amount of the segment in the radial direction can be further increased.

  According to the present invention, it is possible to provide a conveying device for tire constituent members corresponding to a wide range of tire sizes without having to exchange segments every time the size of a tire to be produced is changed, and without increasing the size of the entire device. It becomes possible.

It is a side view of the conveyance apparatus of the tire structural member of embodiment according to this invention. It is the side view which expanded a part including the link mechanism and segment of the conveying apparatus of the tire structural member of FIG. It is sectional drawing which showed the cross section which follows the II line | wire in Fig.2 (a). (A), (b) is a perspective view of a link mechanism, (a) has shown the state which extended the link mechanism, (b) has each shown the state which contracted the link mechanism. It is the schematic explaining the relationship between rotation of the motor of a drive part, and relative rotation of a 1st link and a 2nd ring. It is the side view which showed the conveyance apparatus of the tire structural member shown in FIG. 1 in the state which contracted the link mechanism. It is the side view which showed the principal part of the conveying apparatus of the tire structural member of other embodiment according to this invention.

  Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.

  The tire component conveying device (hereinafter, simply referred to as “conveying device”) 1 according to this embodiment is a tire molding material (top tread) to be affixed to a molding drum or a molded green tire in a green tire manufacturing process. An annular tire component T is conveyed, and as shown in FIG. 1, is provided movably along an axis X between a molding drum (not shown) and a BT drum (not shown). A conveyance base, an annular support member 3 erected on the conveyance base 2, and a plurality (in this case, 7) arranged in the circumferential direction on the inner peripheral side of the support member 3 and capable of holding the tire constituent member T from the outer periphery. And a pantograph-type link mechanism 5 disposed between the support member 3 and the segment 4 and connecting the segments 4 to each other.

  The transport base 2 is provided on the lower surface of the base plate 9 and a base plate 9 having a slide bearing as a guide means slidably engaged with a guide rail 7 laid between at least the molding drum and the BT drum. A pinion gear 11 to which a rotational force from a motor 10 as a driving means for driving the base 2 is transmitted. The pinion gear 11 meshes with a rack gear 12 laid in parallel to the guide rail 7 and travels. The conveyance base 2 moves between the molding drum and the BT drum along the axis X.

  The support member 3 is provided so as to be movable up and down with respect to the transport base 2. More specifically, the support member 3 can be lifted and lowered by two fluid-driven cylinders 14 as support member lifting means. The cylinder 14 is fixed vertically to the base plate 9 of the transport base 2, and its piston rod 14 a is connected to the lower part of the support member 3 (lower part of a support ring 18 described later). The support member may be moved up and down using a screw mechanism or the like instead of the cylinder 14 (not shown).

  Further, as shown in FIG. 2, the support members 3 are arranged to face each other in the axial direction of the tire constituent member, that is, in the direction of the axis X, and are rotatable in the opposite directions in the circumferential direction. It has a ring 16 and a second ring 17. In addition, an annular support ring 18 is provided on the outer peripheral side of the first ring 16 and the second ring 17 with a necessary gap therebetween, and the outer peripheral surfaces of the first ring 16 and the second ring 17 and the support ring 18 are provided. A number of freely rotatable rollers 19 are interposed between the inner peripheral surface and the inner peripheral surface, so that the first ring 16 and the second ring 17 rotate in the circumferential direction with respect to the support ring 18. It is supported freely.

  As shown in FIGS. 2 and 3, the link mechanism 5 is disposed so as to intersect the pair of parallel first links 21a and 21b connecting the support member 3 and the segment 4, and the first links 21a and 21b. A pair of parallel second links 22a and 22b for connecting the support member 3 and the segments 4 to each other are pivotally connected to each other at a swing fulcrum 23 at an intermediate portion. The segment 4 is synchronously moved in the radial direction by the mutual rotation of 21a, 21b and the second links 22a, 22b. One of the pair of first links 21a and 21b has a pin 24 provided at the outer end in the radial direction supported and guided by a guide groove 16a provided in the first ring 16 along the circumferential direction. (Refer to FIG. 2 (b)), the swinging fulcrum 23 is slidably connected to the first ring 16 as a fulcrum. The other 21b of the first links 21a and 21b is pivotally connected to the second ring 17 at the outer end in the radial direction so as to be swingable. One of the pair of second links 22a, 22b is pivotally connected to the first ring 16 at the outer end in the radial direction, and the other 22b of the second links 22a, 22b is connected in the radial direction. A pin 25 provided at the outer end is supported and guided by a guide groove 17a provided along the circumferential direction of the second ring 17, so that the second ring 17 can be slid to the second ring 17 using the swing fulcrum 23 as a fulcrum. It is connected to. Therefore, when the first rings 21a and 21b and the second rings 22a and 22b are relatively rotated in the direction indicated by the arrows in FIG. 3A, the link mechanism 5 extends, and conversely, the arrows in FIG. When it is relatively rotated in the direction shown, the link mechanism 5 is folded and contracted.

  As shown in FIGS. 2B and 3, between the first ring 16 and the second ring 17 of the support member 3, a drive unit that rotates the first ring 16 and the second ring 17 in directions opposite to each other. 27, and the drive unit 27 includes rack gears 16b and 17b partially formed on opposing surfaces of the first ring 16 and the second ring 17, and a pinion gear 28 that meshes with the rack gears 16b and 17b. 4 and a motor 29 that rotates the pinion gear 28. When the motor 29 is driven by this, the driving force is transmitted to the first ring 16 and the first ring 16 via the pinion gear 28 and the rack gears 16b and 17b as shown in FIG. The first ring 16 and the second ring 17 are rotated in opposite directions to each other. Here, a servo motor is employed as the motor 29, and feedback control of position, torque, speed, etc. is possible via a controller (not shown).

  The segments 4 are evenly arranged in the circumferential direction, and as shown in FIGS. 2A and 2B, the moving block 30 and an arc-shaped contact integrally connected to the inner end in the radial direction of the moving block 30. It has a T-shaped cross section formed by the surface 31. On both side surfaces of the moving block 30, guide grooves 30a for supporting and guiding the pins 32 provided at the inner ends in the radial direction of the first links 21a and 21b and the second links 22a and 22b of the link mechanism 5 are provided. As a result, when the first links 21a, 21b and the second links 22a, 22b rotate relative to each other with the swing fulcrum 23 as a fulcrum, the radial directions of the first links 21a, 21b and the second links 22a, 22b The inner end slides along the guide groove 30 a of the moving block 30. Further, here, the guide groove 30a is formed in the radial direction of the first link 21a, 21b and the second link 22a, 22b from the swing fulcrum (the pivot connection position) 23 of the first link 21a, 21b and the second link 22a, 22b. Is formed in a circular arc shape with a radius r as a distance d to the inner end (more specifically, the center of the pin 32), and is arranged in a direction that expands toward the inner side in the radial direction. The term “end spread” as used herein means that the distance L measured along the direction perpendicular to the radial direction between the two guide grooves 30a, 30a provided on the same side surface of the moving block 30 increases inward in the radial direction. It means to become big.

  Next, a method for taking out and transporting the green tire molded on the molding drum using the transport device 1 from the molding drum will be described.

  In the transport device 1, first, as shown in FIGS. 3B and 5, the first ring 16 and the second ring 17 of the support member 3 are relatively rotated by the motor 29 of the drive unit 27, and the link mechanism 5. Shrink. As a result, the segment 4 moves radially outward. In this embodiment, since a servo motor is used as the motor 29 of the drive unit 27, for example, the position of the segment 4 when the link mechanism 5 is contracted to the maximum may be set to “zero”. Next, the entire conveying apparatus 1 is moved to the molding drum side by driving the conveying base 2. Thereafter, as shown in FIGS. 3A and 1, the motor 29 of the drive unit 27 is driven in the opposite direction to the previous direction, and the first ring 16 and the second ring 17 are rotated in the opposite direction. Then, the link mechanism 5 is extended, and the molding surface of the molding drum is reduced in diameter at the same time, whereby the conveying device 1 can take out the raw tire T from the molding drum. The extension amount of the link mechanism 5 may be given in advance to the controller as a target value according to the size of the tire to be produced. Switching the size of the tire to be produced can be easily performed without changing the segment 4 according to the size, for example, only by changing the setting of the target value of the motor 29.

  Therefore, according to the transfer device 1 of the present invention, it is not necessary to replace the segment 4 every time the size of the tire to be produced is changed, and it is possible to deal with a wide range of tire sizes without increasing the size of the entire device.

  In addition to the setting of the target value of the extension amount of the link mechanism 5 in the controller, or in place of this, when the torque of the motor 29 is managed and a torque exceeding a predetermined value is applied to the motor 29, the target value is set. Regardless of whether or not the motor 29 is reached, the driving of the motor 29 may be stopped. According to this, when the force exceeding the set torque is applied to the tire constituent member T, the contraction movement of the segment 4 is stopped. Therefore, when a top tread or a green tire is gripped, these deformations can be suppressed, and a high-quality product tire can be obtained.

  Further, when the segment 4 moves toward holding the tire constituent member T, it is not necessary to always wait the segment 4 at the radially outermost position (the “zero” position). For example, the size of the tire to be produced is relatively small. In this case, it is possible to wait on the radially inner side of the outermost position (between the outermost position and the outer periphery of the tire constituent member T). The working distance (time) until the holding of the structural member T is completed can be shortened.

  Further, the guide groove 30a formed in the moving block 30 of the segment 4 is moved from the pivot connection position 23 of the first link 21a, 21b and the second link 22a, 22b to the first link 21a, 21b and the second link 22a, 22b. The arcs have a radius r that is a distance d to the inner end in the radial direction, and are arranged in a direction that expands toward the inner side in the radial direction, so that the first links 21a, 21b and second of the link mechanism 5 are arranged. When the links 22a and 22b are rotated relative to each other, the segment 4 can be prevented from moving to the left and right (circumferential direction), and the tire constituent member T can be held securely and uniformly. Further, when the link mechanism 5 is extended, the smaller the crossing angle of the first links 21a and 21b and the second links 22a and 22b is, the more the extension amount of the link mechanism 5 is increased, and the guide grooves 30a and the pins 32 are used. Since the segment 4 is pushed up radially inward by the first link 21a, 21b and the second link 22a, 22b, the amount of movement of the segment 4 in the radial direction can be further increased.

  As mentioned above, although demonstrated based on the example of illustration, this invention is not limited to the above-mentioned example. For example, the link mechanism has one stage in the radial direction (one swinging fulcrum), but as shown in FIG. 6, the link mechanism is provided in two or more stages in the radial direction (two or more swinging fulcrums 23). In this case, the movement amount of the segment can be further increased.

  According to the present invention, it is possible to provide a tire component conveying device that supports a wide range of tire sizes without having to replace segments every time the size of a tire to be produced is changed, and without increasing the overall size of the device. became.

DESCRIPTION OF SYMBOLS 1 Conveyance apparatus of a tire structural member 2 Conveyance base 3 Support member 4 Segment 5 Link mechanism 16 1st ring 17 2nd ring 18 Support ring 19 Roller 21a, 21b 1st link 22a, 22b 2nd link 27 Drive part 29 Motor (servo) motor)
30a Guide groove

Claims (4)

In the conveying device for the tire component that conveys the annular tire component from the outer periphery,
A transport base;
An annular support member erected on the transfer base;
A plurality of segments arranged in the circumferential direction on the inner peripheral side of the support member, and capable of holding the tire constituent member from the outer periphery;
A pair of parallel first links connecting between the support member and the segments; and a pair of parallel second links arranged crossing the first link and connecting between the support members and the segments; A link mechanism that pivotally connects the first link and the second link so that the segments can be synchronously moved in the radial direction .
The support member has a first ring and a second ring which are arranged opposite to each other in the axial direction of the tire constituent member and are rotatable in opposite directions.
One of the pair of first links is slidably connected to the first ring at the outer end in the radial direction in the circumferential direction, and the other is swingable to the second ring at the outer end in the radial direction Being pivotally connected,
One of the pair of second links is pivotally connected to the first ring at one outer end in the radial direction, and the other is circumferentially connected to the second ring at the outer end in the radial direction. A slidably coupled tire conveying member conveying device. Comprising a first ring and a drive unit for rotating the second ring in opposite directions, the conveying device of the tire component member according to claim 1. The tire drive member conveying device according to claim 2 , wherein the drive unit includes a servo motor. The segment has the first link and the slidably supported to the guide groove in the radial direction of the inner end of their respective second link, said guide groove, said first link and said second link An arc shape whose radius is a distance from the pivot connection position to the inner ends in the radial direction of the first link and the second link, and is arranged in a direction that expands toward the inner side in the radial direction. Item 4. The tire component conveying device according to any one of Items 1 to 3 .

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