JP4371491B2 - Bead roundness correction device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
This invention relates to equipment you correct the roundness of the bead that is embedded in the bead portion of a pneumatic tire.
[0002]
[Prior art]
Conventionally, a pneumatic tire bead is, for example, formed by winding a rubberized steel wire a plurality of times into an annular shape, and then winding a thin rubberized fabric tape spirally around the entire circumference. To be molded. Then, after such a forming operation is finished, the beads are aligned on the support rods by being hooked one after another on the two horizontal support rods, and then removed from the support rods as they are. Temporarily stored in a flat stack, and then, if necessary, two beads were taken out from each other and used for the production of pneumatic tires.
[0003]
In recent years, in order to increase the speed and labor saving of pneumatic tire manufacturing, the required number of beads temporarily stored as described above are automatically taken out by the delivery device and delivered to the bead supply device. It has come to be.
[0004]
[Problems to be solved by the invention]
However, since the beads are usually somewhat distorted in shape, if they are transferred from the state suspended on the support rod to the flat stacked state as described above, the adjacent beads are shifted laterally by a maximum of about 10 mm. , Automatic take-out of beads by the delivery device sometimes failed. Development of that equipment to correct the roundness of the bead from such things had been expected.
[0005]
The present invention has been made in response to such as described above expectations, and to provide a矯formal location capable of correcting the roundness of the bead easily and reliably.
[0006]
[Means for Solving the Problems]
Such objects are spaced apart in the circumferential direction on a single circle Rutotomoni, tip inclined toward the center of the single yen, the diameter of the circumscribed circle is at least three are bead inner diameter than and correcting member, and a plurality of mounting consisting置片mounting member supporting projections are formed bead on the inner periphery is placed, moving means for moving along the straightening members the placing placing member, placed piece And a contact / separation means for moving the support member toward and away from each other in the radial direction, and after placing the beads on the support protrusions of the placement member, the placement means and the beads are moved along the correction member by the movement means. , by fitting the distal end side to the outside, but a pushing the bead already engaged in straightening member proximally of the straightening member to correct the circularity of the Rabbi over de, then placed spaced apart from one another is moved radially outward by the moving means migraine It can be achieved by roundness correction device of the bead to be retracted from 矯 positive members.
[0007]
When correcting the roundness bicycloalkyl over de, after it placed on the mounting member mounting a shaped bead, but is fitted from the front end side on the outer side of the mounting member and the bead of the straightening member, At this time, the bead can be smoothly fitted to the correction member. Further, the bead already fitted to the outside of the straightening member is pushed to the proximal end side by the mounting member described above, and deforms along the circumscribed circle of the straightening member while receiving circumferential tension, and the roundness thereof Is corrected with high accuracy.
[0008]
Thereafter, the mounting member is returned to the initial position.At this time, the mounting pieces are separated from each other so that the mounting member does not pull out the beads once fitted to the correction member. Return the setting piece to the initial position. Then, by repeating such operations, the corrected beads are superimposed and aligned one after another on the outside of the correction member. Thus the present invention can be both simple structure and corrective work, moreover, can be easily aligned bead high roundness.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1 and 2, reference numeral 11 denotes a horizontal base, and six guide rails 13 extending in the radial direction are laid out at equal angles on the upper surface of a support plate 12 fixed on the base 11. Reference numerals 14 denote movable bases each having a slide bearing 15 slidably engaged with the guide rail 13 attached to the lower surface thereof. At the top of these movable bases 14, at least three as correction members, here the guide rail 13 and Six cylindrical rods 16 having the same number are fixed. Here, the straightening rods 16 extend in the vertical direction and are arranged at equal distances in the circumferential direction on a single circle centered on the intersection of the guide rails 13. Each straightening rod 16 has an inclined portion 17 at the tip (upper end) thereof, and these inclined portions 17 are inclined toward the center of the single circle, that is, radially inward, toward the tip (upward). Yes.
[0010]
A rotating shaft 21 extending in the vertical direction is installed at the center of the single circle, and the rotating shaft 21 is rotatably supported by a boss 22 fixed to the support plate 12. Reference numeral 23 denotes a horizontal rotating disk fixed to the upper end of the rotating shaft 21. On the outer peripheral part of the rotating disk 23, there are radially inner ends of the links 24 which are the same number as the movable base 14. The links 24 are rotatably connected, and the radially outer ends of the links 24 are connected to the movable base 14 so as to be rotatable. In addition, a piston rod of a cylinder (not shown) is connected to the tip of the arm 25 fixed to the lower end of the rotating shaft 21. As a result, the cylinder is operated to rotate the rotating shaft 21. When it moves, the movable base 14 and the correction rod 16 move in the radial direction synchronously while being guided by the guide rail 13. The guide rail 13, the movable base 14, the slide bearing 15, the rotating shaft 21, the boss 22, the rotating disk 23, the link 24, the arm 25, and the cylinder as a whole move in the radial direction in synchronization with the correction rod 16. Thus, the expansion / contraction means 26 for expanding / contracting is configured.
[0011]
When the roundness of the bead B is corrected using the correction rod 16 described above, the expansion / contraction means 26 is operated to reach a position where the diameter of the circumscribed circle of the correction rod 16 is equal to or larger than the inner diameter of the bead B. The correction rod 16 is moved synchronously in the radial direction. Here, the difference between the diameter of the circumscribed circle and the inner diameter of the bead is preferably 1.5 mm at the maximum. The reason is that if the difference exceeds 1.5 mm, the frictional resistance between the correction rod 16 and the bead B at the time of fitting increases, and the fitting work may become difficult.
[0012]
Reference numeral 31 denotes a pair of guide posts standing on the base 11 at the side of the support plate 12. Guide rails 32 extending in the vertical direction are laid on the side surfaces of the guide posts 31, respectively. Reference numeral 33 denotes a pair of lifts to which slide bearings 34 that are slidably engaged with the guide rails 32 are respectively attached. Horizontal lift plates 35 are fixed to the lifts 33. A guide rail 36 extending linearly is laid on the lower surface of the elevating plate 35, and a plurality of, here two, slide bearings 39 fixed to the upper surface of the mounting piece 37 are slidable on the guide rail 36. Is engaged. The two mounting pieces 37 described above constitute a mounting member 38 on which the bead B is mounted as a whole.
[0013]
Here, each mounting piece 37 is formed with a semicircular recess 40 having a diameter approximately equal to the outer diameter of the bead B and a center positioned on the center of the single circle on the side close to each other. In the inner circumference, when the bead B is placed, three support projections 41 for supporting the bead B from below, a total of six support projections 41, are formed at substantially equal distances in the circumferential direction. 42 is a guide piece fixed to the upper surface of any two of the support protrusions 41, and these guide pieces 42 function as a guide when the bead B is placed on the placement member 38. Then, the bead B is temporarily positioned substantially on the circumscribed circle of the straightening rod 16.
[0014]
Reference numeral 44 denotes a pair of cylinders attached to the upper surface of the elevating plate 35, the heads of which are fixed to each other. When the cylinder 44 is actuated and the piston rod 45 is retracted, the placing pieces 37 approach each other so that the beads B can be placed. On the other hand, when the piston rod 45 protrudes, the placing pieces 37 are separated from each other. Then retract from the straightening rod 16 to the side. The guide rail 36, the slide bearing 39, and the cylinder 44 described above constitute a contacting / separating means 46 that moves the mounting pieces 37 closer to and away from each other.
[0015]
Reference numeral 50 denotes a cylinder as a moving means extending in the vertical direction, the head side being connected to the guide post 31 above the lifting plate 35, and the tip of the piston rod 51 of the cylinder 50 is connected to the lifting plate 35. As a result, when the cylinder 50 is operated and the piston rod 51 protrudes or retracts, the elevating platform 33 and the mounting member 38 move (elevate) along the correction rod 16 while being guided by the guide rail 32.
[0016]
Next, the operation of one embodiment of the present invention will be described.
Since the finished bead B has a somewhat irregular shape, it is necessary to correct the roundness, but when such correction is performed, first, the cylinder of the expansion / contraction means 26 is operated and rotated. Rotate the shaft 21 and synchronize the correction rods 16 along the guide rails 13 in the radial direction until the diameter of the circumscribed circle of the correction rods 16 is equal to or larger than the inner diameter of the bead B and the difference becomes a maximum of 1.5 mm. Move.
[0017]
Next, the bead B is placed on the placement member 38, specifically, the support protrusion 41. At this time, the outer periphery of the bead B is pressed against the guide piece 42, thereby using the guide piece 42 as a guide. Is temporarily positioned on the circumscribed circle of the correction rod 16. Next, the piston rod 51 of the cylinder 50 is protruded, and the mounting member 38 on which the lifting platform 33 and the bead B are mounted is lowered along the guide rail 32. As a result, the mounting member 38 and the bead B are fitted to the outside of the correction rod 16, and at this time, the tip of each correction rod 16, that is, the inclined portion 17 moves toward the tip (upward). Since the bead B is inclined toward the center (radially inward), the bead B can be smoothly fitted to the correction rod 16.
[0018]
In this way, the bead B is fitted to the outside of the tip (upper end) of the correction rod 16 . In here, alone for the correction of roundness for a sufficient only by providing the correction rod 16, it is possible to simplify the structure, moreover, fitting the bead B on the outside of the correction rod 16 The correction work is easy because it is good.
[0019]
After that, since the cylinder 50 continues to operate, the mounting member 38 moves down to the base end portion (lower end portion) of the correction rod 16 alone. Next, the mounting member 38 is returned to the initial position. At this time, the cylinder 44 is operated so that the mounting member 38 does not pull out the bead B once fitted to the correction rod 16. The piston rod 45 is protruded. Thereby, the placing pieces 37 are separated from each other and come out of the correction rod 16 and retract to the side. Next, the piston rod 51 of the cylinder 50 is retracted to raise the mounting member 38, and the piston rod 45 of the cylinder 44 is retracted to return the mounting piece 37 to the initial position.
[0020]
Next, after placing a new bead B on the placement member 38 in the same manner as described above, the cylinder 50 is operated to lower the placement member 38 to the proximal end of the correction rod 16, and the new bead B Is fitted to the outside of the distal end portion of the straightening rod 16, and the previous bead B that has already been fitted to the outside of the distal end portion of the straightening rod 16 by the above-described fitting operation is moved to the proximal end portion of the straightening rod 16 by the mounting member 38. Push in. In this case, bi over de B is deformed along a circumscribed circle of the corrective rod 16 while receiving tensile circumferential, its roundness is corrected with high precision. Next, after the placement piece 37 is retracted from the correction rod 16 as described above, the placement piece 37 is returned to the initial position.
[0021]
Then, by repeating such an operation, the beads B that have been corrected are successively overlapped and aligned on the outside of the correction rod 16. Thereby, the high roundness bead B can be easily aligned. And the roundness of the bead B corrected and stacked in this way is maintained by the adjacent beads B sticking to each other by the adhesive force of the tape wound around the bead B.
[0022]
Next, when beads B having different inner diameters are formed in accordance with the size change of the tire to be manufactured, the cylinder of the expansion / contraction means 26 is operated to move the correction rod 16 synchronously in the radial direction. The position of the correction rod 16 is adjusted so that the diameter of the bead B and the inner diameter of the bead B molded this time have the above-mentioned relationship. By doing in this way, roundness can be easily corrected also about the bead B of a different internal diameter.
[0023]
In the above-described embodiment, the columnar correction rod 16 is used as the correction member. However, in the present invention, an arc plate obtained by curving a plate-like body in an arc shape may be used as the correction member. . In the above-described embodiment, the mounting member 38 is composed of two mounting pieces 37. In the present invention, the mounting member is composed of three or more mounting pieces. You may make it evacuate from a correction member by synchronizing and moving to a radial direction outer side.
[0024]
【The invention's effect】
As described above, according to the present invention, the roundness of the bead can be corrected easily and reliably.
[Brief description of the drawings]
FIG. 1 is a partially broken side view showing an embodiment of the present invention.
2 is a cross-sectional view taken along arrows II in FIG.
[Explanation of symbols]
[0025]
16 ... Corrective member 26 ... Expansion / contraction means
37… Placement piece 38… Placement member
46 ... Contact / separation means 50 ... Moving means B ... Bead

Claims (1)

Are spaced apart circumferentially on a single circle Rutotomoni, tip inclined toward the center of the single circle, and at least three straightening member diameter of the circumscribed circle is the bead inner diameter than the inner peripheral bead and the mounting member made of the placed is supported projections plural formed rest piece, moving means for moving along the straightening members the placing mounting member, the mounting piece is moved radially and a moving means for approaching away from each other Te, mounting after mounting the bead mounting member of the support on the projection, is moved along the straightening members these mounting member and the moving means of the bead, tip side to the outside by fitting from, the indentation of the bead already engaged in straightening member proximally of the straightening member to correct the circularity of the Rabbi over de, then the moving means to rest piece retracted from 矯 positive member is spaced from each other by moving radially outwards Roundness correction device of the bead, characterized in that so as to.

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