JP3850968B2 - Tire reinforcement cord arranging apparatus and method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tire reinforcing cord arranging device and method suitable for use in the construction of a tire reinforcing member such as a carcass, a belt, and a breaker in a tire molding process, and in particular, without manual operation by an operator. Thus, an automatic configuration of a required tire reinforcing member is realized.
[0002]
[Prior art]
For example, automatically configuring a carcass on a support mold having an outer surface shape corresponding to or close to the inner surface shape of a product tire is disclosed in JP-A-2-501378, JP-A-6-155628, and the like. Is disclosed.
[0003]
Here, the former prior art described in Japanese Patent Application Laid-Open No. 2-501378 discloses that a weaving head is made close to a tire frame shape under the action of two ball screws extending in directions orthogonal to each other. The cord is woven on the woven surface to form a carcass by relatively displacing the woven surface in the axial direction and the circumferential direction of the woven surface.
[0004]
However, in this prior art, the specific configuration and operation of the weaving head is completely unknown, and therefore, this prior art can always arrange the cord at the exact position as expected. There are many questions.
[0005]
Further, the latter prior art described in Japanese Patent Laid-Open No. Hei 6-155628 has a sliding guide device in which a reinforcing cord can freely slide and a movement for moving the guide device along a reciprocating motion trajectory. Means and a pressing device for pressing the reinforcing cord on the support, which is disposed at least at both ends of the reciprocating trajectory, and the reinforcing cord is adhered to the support using the pressing device. The guide device is moved between the pressing device and the reinforcing cord supply device so that the reinforcing cord passes along the trajectory drawn by the reinforcing cord when the reinforcing cord is wound on the support, thereby extending the trajectory of the reinforcing cord. In the case where the reinforcing cord is attached to the support body with the other pressing device before the guide device moves in the reverse direction along the reciprocating motion locus, the reinforcing cord is attached sequentially behind the Same behavior It is intended to perform, the pressing device, which is constituted by a fork member and the hammer.
[0006]
According to this latter technique, it is considered that the cord can be prevented from being unexpectedly peeled by strongly pressing the folded portion of the reinforcing cord, that is, the carcass cord, to the support under the action of the hammer.
[0007]
[Problems to be solved by the invention]
However, in the latter prior art, it is inevitable to dispose each of the fork member and the hammer that are both moved forward and backward under the mutual relation in the folded portion of the cord or in the vicinity thereof. Is complicated, and there is an inconvenience that the apparatus becomes large, and these means that the moving means is constituted by an endless strand which can be a chain, which is mounted on a guide path curved in a substantially arc shape, In addition, a positioning device that determines and adjusts the position of the guide path with respect to the support is further provided, which is particularly serious when the support is inserted between two branches of an arc formed by the positioning device. .
[0008]
Moreover, this fork member of the prior art is such that when the reinforcing cord reaches a specific position, the cord is hooked between the claws to advance toward the support body. Until it is hooked, the contour of the support mechanism of the fork member is displaced, so that the reinforcing cord adheres to the support while the cord is in contact with the support mechanism. However, the reinforcing cord bonded on the support is always curved at a specific position on the support, and is bent from one folded end. There was a problem that it could not extend in a straight line until the other folded end.
[0009]
The present invention has been made as a result of studying as a subject to solve such problems of the prior art, and an object of the present invention is to place a tire reinforcing cord on a support type outer surface. The present invention is to provide a tire reinforcing cord arranging apparatus and method having a simple structure and a small size, capable of sufficiently sticking to a predetermined position at all times and sufficiently preventing unexpected separation of the tire reinforcing cord. .
[0010]
[Means for Solving the Problems]
The tire reinforcement cord disposing device of the present invention is a support-type of a substantially donut shape or cylindrical shape that is attached to the wrist of a multi-joint type multi-degree-of-freedom manipulator and indexed at a predetermined timing and angle. A cord adhering means for adhering at least one cord in sequence to the outer surface based on relative movement in the axial direction and circumferential direction of the supporting mold, the cord adhering means being A pair of mutually parallel rollers in contact with the outer surface of the support mold, and connecting these rollers to the wrist and allowing the rollers to move forward and backward with respect to the wrist, for example, comprising a spline shaft and an outer cylinder Or a shaft member composed of a so-called ball spline in which a ball is incorporated between them, and a roller that presses the roller against the outer surface of the support mold, for example, a coil spring, rubber, rubber The elastic body, which is constituted by the spring means of the air spring or the like, a code passage leading between the two rollers.
[0011]
In addition, other tire reinforcing cord disposing devices, in particular, connect the cord adhering means with one roller in contact with the outer surface of the support mold and this roller to the wrist, and the forward and backward displacement of the roller with respect to the wrist. A shaft member similar to that described above, a spring means similar to that described above that presses the roller against the outer surface of the support mold, and a cord passage that opens near the circumferential surface of the roller.
[0012]
Here, in any of these apparatuses, more preferably, a tension adjusting means for the tire reinforcing cord to be fed out is provided.
[0013]
Using such a device, for example, with respect to a support type having a substantially donut shape, a tire reinforcement is provided between a position corresponding to one tire bead part and a position corresponding to the other tire bead part on the outer surface thereof. When a carcass cord as an example of a cord is provided, for example, first, in a state where the support type indexing operation is stopped, the cord attaching means attached to the manipulator is moved in the axial direction of the support type. The carcass cord supplied through the cord passage is moved by the roller that is pressed against the outer surface of the support mold with a spring means during the movement from the corresponding position to the other bead portion. By pressing against the outer surface of the support mold, the carcass cord is linearly formed in the axial direction of the support mold on the outer surface of the support mold based on the linear rolling of the roller. It will be stuck. Here, the carcass cord is attached by applying or coating an unvulcanized rubber or other adhesive substance on the carcass cord in advance, and forming an unvulcanized inner liner layer or the like on the outer surface of the support mold in advance. It can be realized by at least one of the following.
[0014]
By the way, in such an arrangement stroke of the carcass cord, bringing the roller into contact with the outer surface of the support mold from the normal direction thereof maintains the roller pressing force at a predetermined constant value throughout the stroke. Is preferable.
[0015]
Here, when the tension adjusting means for the carcass cord to be fed is provided, the cord tension can be maintained sufficiently uniform throughout the entire cord arrangement process as well as the arrangement stroke.
[0016]
Next, the wrist of the manipulator is operated to change the direction of the central axis of the roller by 90 °, and then the indexing operation is performed on the support mold so that the carcass cord is positioned at the position corresponding to the other bead portion. Can be attached by extending in the circumferential direction.
[0017]
Thereafter, while the indexing operation of the support mold is stopped, the roller axis is further changed by 90 °, and the roller is moved from the position corresponding to the other bead section to the position corresponding to the one bead section. By moving in the axial direction, the carcass cord is linearly attached to the outer surface of the support based on the roller pressing force.
[0018]
In this way, when the reciprocating stroke of the carcass cord is completed, the direction of the roller axis is changed by 90 ° at a position corresponding to one bead portion, and the indexing operation of the support type is brought about. Is extended in the circumferential direction of the support mold, and after the indexing operation of the support mold is stopped, the central axis of the roller is further changed by 90 ° to move the roller in the support mold axial direction. Make the rolling possible.
[0019]
After the series of operations is completed as described above, the above-described steps are sequentially repeated until the arrangement of the carcass cord over the entire circumference of the support die is completed.
[0020]
Thus, according to this arrangement device, a small device with a simple structure is always accurately located at the desired position on the outer surface of the support mold without fear of interference between other components and the carcass cord. Can be attached.
[0021]
In addition, as described above, the carcass arranging method of the present invention is based on the alternating operation of the doughnut-shaped or cylindrical support mold that is indexed and the cord attaching means attached to the manipulator. When the carcass cord is attached to the outer surface of the support die by alternately extending in the axial direction and the circumferential direction of the support die, the carcass cord is pressed against the outer surface of the support die by a roller. At the bottom, the carcass cord is temporarily and particularly strongly pressed against the outer surface of the support mold by the roller prior to changing the extending direction of the carcass cord.
[0022]
According to this method, the cord by the roller at least one of before and after the change of the extending direction of the carcass cord, in other words, the 90 ° change of the central axis of the roller pressing the carcass cord against the outer surface of the support mold By temporarily increasing the pressing force and strengthening the adhesion force of the carcass cord to the outer surface of the support mold, after the change in the extending direction of the cord, it still resists the elastic restoring force of the carcass cord, Since the cord can be securely maintained in the intended position and the cord can be prevented from accidental peeling, the carcass cord can be attached after the extension direction has been changed. Of course, it is possible to eliminate the need for any other special mechanism to secure the required state of attachment of the folded portion of the carcass cord to the outer surface of the support mold.
[0023]
As used herein, the terms “axial direction” and “circumferential direction” are the same as those in the respective directions, and in accordance with the customary arrangement of cords for tire reinforcing members such as carcass, belt, breaker, etc. The case where it arrange | positions in the direction which makes a desired angle (for example, 15 degrees, 30 degrees, 45 degrees) with respect to this direction is also included.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic perspective view showing an embodiment of an apparatus according to the present invention, wherein 1 is an articulated multi-degree-of-freedom manipulator, and 2 is an outer surface shape corresponding to the inner surface of a product tire. The doughnut-shaped rigid support mold | type which has is shown, respectively. The rigid support die 2 is a plurality of pieces that sequentially perform a radially inward displacement and an axial displacement of the rigid support die 2 so that the product tire after vulcanization can be removed therefrom. Indexing operation is performed by a predetermined angle by an indexing device (not shown) comprising, for example, a servomotor, a speed reducer, and a coupling.
[0025]
The multi-degree-of-freedom manipulator 1 is a six-degree-of-freedom multi-joint type manipulator as shown in a perspective view of FIG. A first arm 5 connected to the leg 4 and swinging around the horizontal axis, and connected to the force arm 5 and swinging around the horizontal axis, and around a central axis perpendicular to the horizontal axis A second arm 6 that rotates, and a wrist 7 that is connected to the second arm 6 and performs a swinging motion and a rotating motion around the central axis.
[0026]
Further, the cord attaching means 8 which is attached to the wrist 7 of such a manipulator 1 and attaches the carcass cord one or more pieces to the outer surface of the rigid support mold 2 is enlarged in FIG. It has a configuration as shown in a perspective view. That is, the code sticking means 8 here includes a shaft portion 10 that protrudes in the axial direction from a connecting portion 9 that is flange-connected to the tool mounting surface of the wrist 7, and has a spline processing portion 10a at a tip portion thereof. A shaft member is provided which is fitted to the spline processing portion 10a of the portion 10 and is preferably displaceable in the axial direction via a large number of balls, and is provided at the tip of the outer cylinder portion 11 A pair of rollers 13 parallel to each other are rotatably disposed via the bracket 12, and a compression spring 14 is interposed between the large diameter portion 10 b of the shaft portion 10 and the outer cylinder portion 11. The outer cylinder portion 11, and consequently both rollers 13, are pressed against the lower side of the figure by the compression spring 14, and the shaft portion 10 is further pressed against the shaft member as shown in a longitudinal sectional view in FIG. The center and outside It becomes constituted by providing a code passage 15 which opens through the center portion of the section 11 between the rollers.
[0027]
The cord attaching means 8 has an appropriate retaining means not shown in order to prevent the outer cylinder portion 11 from falling out downward in the figure under the action of the compression spring 14.
[0028]
The cord adhering means 8 configured as described above receives an indentation force from the wrist 7 of the manipulator 1 and generates a relative displacement in the axial direction between the shaft portion 10 and the outer cylinder portion 11. The roller 13 can be pressed against the outer surface of the support die 2 with a force corresponding to the elastic restoring force of the compression spring 14.
[0029]
Further, the sticking means 8 can move linearly in the direction perpendicular to the central axis of the rollers 13 based on the free rotation of the rollers 13 by the action of an external force from the wrist 7. In this case, the carcass cord 16 supplied from the feeding means (not shown) through the cord passage 15 can be stepped on by any one of the rollers 13 so that the carcass cord 16 is adhered to the outer surface of the support mold. it can. The cord sticking force at this time can be increased by increasing the pressing force of the roller 13 to the outer surface of the support mold.
[0030]
By the way, in order to press the cord 16 with a predetermined force at a constant position of the roller 13 at least one roller 13 that contributes to the sticking of the carcass cord 16 in FIG. As shown, a structure having a circumferential groove 13a having a depth shallower than the diameter of the cord 16 can be obtained.
[0031]
Further, the cord attaching means 8 is rotated at a required angle, for example, 90 °, around the center of rotation under the spline fitting between the shaft portion 10 and the outer cylinder portion 11 by the rotational movement of the wrist 7 of the manipulator 1. In this rotation, the center of rotation of the cord attaching means 8 is illustrated in FIG. 5 as a schematic plan view of one roller 13 that presses the carcass cord 16. The pressing center O is preferable. According to this, even when the carcass cord 16 is stuck on the outer surface of the support mold with the cord sticking means 8, even if it is necessary to change the extending direction of the cord 16, Before and after the change of posture, the cord 16 can be sufficiently pressed against the outer surface of the support mold at the position of the pressing center O. Therefore, the cord pressing force is insufficient at the changed portion in the extension direction of the cord. The unintentional peeling of the resulting code 16 is effectively prevented.
In addition, the curve A in the drawing indicates the movement path of the opening between the rollers of the cord passage 15.
[0032]
By the way, in consideration of the stability of the code sticking means 8 during translation, when the axial length of each roller 13 is set relatively long as shown in FIGS. In order to make the above-described rotational movement of the means 8 smoother, each roller 13 is divided into a plurality of parts in the length direction, and each divided part is in accordance with the frictional force with the outer surface of the support mold. Thus, it is preferable to rotate them independently of each other.
[0033]
FIG. 6 is a view showing another embodiment of the cord attaching means 8, in which a roller 17 is rotatably disposed at the tip of the outer cylinder portion 11 of the shaft member via the bracket 12. The cord passage 15 is opened in the vicinity of the peripheral surface of the roller 17, and the other points are configured in substantially the same manner as described above.
[0034]
Therefore, when the carcass cord 16 is stuck by the sticking means 8, the single roller 17 always presses the cord 16 at the expected position. Moreover, in this sticking means 8, the rotational movement associated with the change in the extending direction of the cord 16 generally passes around the center of the cord pressing of the roller 17 and around the central axis of the sticking means 8. According to this, the rotation center of the wrist 7 and the rotation center of the sticking means 8 can be matched.
[0035]
When the cord adhering means 8 as described above is attached to the wrist 7 of the manipulator 1 and the carcass cord 16 is disposed on the outer surface of the support die 2 as expected, Prior to being inserted into the cord passage 15, it is preferable to pass the cord 16 through a tension adjusting means 18 of the cord 16, for example, as shown in FIG. Can be made.
[0036]
By the way, the illustrated tension adjusting means 8 includes two guide rollers 18a and 18b, which extend in parallel to each other and are fixed in position, and a movable roller that is positioned between these rollers and is spring-biased downward in the figure. 18c, and the cord 16 wound around the movable roller 18c from the lower side is subjected to the spring force of the spring means 18d and the weight of the roller 18c to effectively remove the slack of the cord 16. The cord tension can always be kept substantially uniform.
[0037]
When the carcass cord 16 is actually disposed, the cord adhering means 8 is disposed at a position corresponding to the one tire bead portion on the outer surface of the support die in the stopped state of the indexing operation based on the action of the manipulator 1. The roller 13, for example, the roller 13 is pressed from the normal direction of the outer surface, and the roller 13 is maintained while maintaining a normal posture with respect to each part of the outer surface of the supporting mold and maintaining a constant pressing state. The carcass cord 16 that is linearly moved in the axial direction of the donut-shaped support mold 2 and pressed against the outer surface of the support mold by the roller 13 is linearly formed on the outer surface as shown in FIG. Adhere to.
[0038]
This continues until the roller 13 and thus the carcass cord 16 is attached until the position corresponding to the other tire bead portion is reached, and when this position is reached, the linear movement of the roller 13 is stopped. The cord pressing force by the roller 13 is temporarily increased based on the elastic restoring force of the compression spring 14.
[0039]
Thereafter, the cord pressing force by the roller 13 is returned to the steady state, and the central axis of the roller 13 is rotated 90 ° clockwise as shown in FIG. 7B, for example. The central axis is set to a posture facing the radial direction of the donut-shaped support mold 2.
[0040]
By the way, the temporary increase of the cord pressing force by the roller 13 can be performed in this rotational posture of the roller 13 instead of or in addition to the above.
[0041]
Next, the cord attaching means 8 and the roller 13 are left as they are, and the support die 2 is indexed by a predetermined angle as shown in FIG. 7C. As a result, the carcass cord 16 is supported. The circumferential sticking of the mold 2 is brought about.
[0042]
After the end of the indexing operation of the support die 2, as shown in FIG. 7D, the central axis of the roller 13 is rotated, for example, 90 ° clockwise, and before and after this rotation. At least on the one hand, the roller 13 causes a temporary increase in the cord pressing force.
[0043]
Further, as shown in FIG. 7E, the roller 13 is moved linearly in the axial direction of the support die 2 from the position corresponding to the other bead part to the position corresponding to the one bead part. The carcass cord 16 is attached in a straight line in the opposite direction to that described above.
[0044]
Thereafter, at a position corresponding to one bead portion, the central axis of the roller 13 is rotated by 90 °, the carcass cord 16 is strongly pressed at least before and after the rotation, and the support die 2 is divided. In addition to sequentially performing the feeding operation, further 90 ° rotation of the roller axis, and strong pressing of the cord 16 on at least one of the front and rear sides thereof, the same cord attaching process as described above is performed. By repeating this operation over the entire circumference of the support die 2 and, in some cases, over a plurality of circumferences of two or more, the carcass cord can be arranged as required.
[0045]
Thus, according to the apparatus of the present invention, the carcass cord 16 is placed on the outer surface of the support die 2 by the multi-degree-of-freedom manipulator 1 having a general configuration and the cord attaching means 8 having a simple structure and a small size. The method according to the invention can be arranged exactly as intended and in particular strongly presses the carcass cord 16 at least before and after the direction change of the central axis of the rollers 13, 17. According to the above, it is possible to sufficiently increase the adhesion strength at the bent portion where the carcass cord 16 is liable to be peeled off, and to further improve the arrangement accuracy of the cord 16, and at the same time, the roller itself By increasing the pressing force by the action, it is not necessary to attach another special mechanism part, and the possibility of interference between the mechanism part and the carcass cord 16 can be completely eliminated.
[0046]
FIG. 8 shows an application example of the apparatus according to the present invention to the support die 20 having a cylindrical shape as a whole, and in this case as well, the cord adhering means 8 is used in the same manner as described above. As a result, the linear motion of the roller 13 or 17 in the axial direction of the support die 20 and the indexing motion of the support die 20 are alternately performed, and the direction change of the roller axis in between, and at least one before and after this direction change In this way, the carcass cord 16 can be disposed on the entire circumference of the support die 20 as expected by temporarily pressing the carcass cord 16 or the like.
[0047]
Although the present invention has been described with reference to the drawings, in the case where the carcass cord is disposed on the support die over two plies, the first ply is passed between the cord from one bead portion to the other bead portion. And the second ply may be arranged so as to intersect with each other.
[0048]
The present invention can also be applied to a case where a belt cord is disposed on a support mold. For example, the cord is spirally wound by relatively winding the cord from one end to the other end substantially along the circumferential direction. A belt is formed, or the cord is obliquely crossed at a predetermined angle with the circumferential direction from one end, folded back into a square shape from the other end, and crossed obliquely to the one end again. The zigzag belt can be configured by repeating as described above over the entire circumference or two or more rounds so that the belt cord is knitted in a zigzag shape.
[0049]
【The invention's effect】
According to the tire reinforcing cord arranging device of the present invention, the tire reinforcing cord can be arranged with high accuracy as expected, and the device structure is simplified and the device is downsized. be able to. By downsizing the device, it is possible to increase the speed of code arrangement and improve productivity.
[0050]
Further, according to the method of the present invention, it is possible to strongly attach the bent portion of the tire reinforcing cord, which is likely to be peeled off, without attaching a special mechanism portion, and further improve the arrangement accuracy of the cord. At the same time, it is possible to reliably remove the possibility of a decrease in the cord disposition accuracy due to the interference between the other mechanism portion and the tire reinforcing cord.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view showing an embodiment of the present invention.
FIG. 2 is an enlarged perspective view showing a manipulator.
FIG. 3 is a diagram showing one embodiment of a code sticking means.
FIG. 4 is a diagram illustrating the shape of a roller.
FIG. 5 is a diagram illustrating a direction conversion example of a roller axis.
FIG. 6 is a diagram partially showing another aspect of the code attaching means.
FIG. 7 is a diagram showing a carcass cord arrangement process.
FIG. 8 is a perspective view showing another application example of the inventive device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Manipulator 2,20 Support type | mold 3 Base 4 Leg part 5 First arm 6 Second arm 7 Wrist 8 Cord sticking means 9 Connection part 10 Shaft part 10a Spline processing part 10b Large diameter part 11 Outer cylinder part 12 Brackets 13, 17 Roller 13a Circumferential groove 14 Compression spring 15 Cord passage 16 Carcass cord 18 Tension adjusting means 18a, 18b Guide roller 18c Movable roller

Claims (4)

Relative movement in the axial and circumferential directions of the support mold on the outer surface of the support mold, which is mounted on the wrist of a multi-degree-of-freedom manipulator and is indexed at a predetermined timing and angle, and has a substantially donut shape or cylindrical shape. On the basis of a device comprising a code sticking means for sequentially sticking at least one cord,
The cord attaching means includes a pair of mutually parallel rollers in contact with the outer surface of the support mold, a shaft member that connects these rollers to the wrist, and allows the rollers to move forward and backward with respect to the wrist, and A tire reinforcing cord disposing device comprising spring means for pressing a roller against an outer surface of a support mold and a cord passage communicating between both rollers. Relative movement in the axial and circumferential directions of the support mold on the outer surface of the support mold, which is mounted on the wrist of a multi-degree-of-freedom manipulator and is indexed at a predetermined timing and angle, and has a substantially donut shape or cylindrical shape. On the basis of a device comprising a code sticking means for sequentially sticking at least one cord,
The cord adhering means includes a roller that contacts the outer surface of the support mold, a shaft member that connects the roller to the wrist and allows the roller to move forward and backward, and the roller as the outer surface of the support mold. A tire reinforcing cord disposing device comprising spring means for pressing the cord and a cord passage opened near the peripheral surface of the roller. The tire reinforcing cord disposing device according to claim 1 or 2, further comprising tension adjusting means for a cord to be fed out. Based on the alternating operation of the donut-shaped or cylindrical support mold to be indexed and the cord attaching means attached to the manipulator, the cord is placed on the outer surface of the support mold, and the axial direction and the circumferential direction of the support mold. When extending and pasting alternately in each direction,
The cord is stuck to the outer surface of the support mold under the pressure of the roller, and prior to changing the extending direction of the cord, the cord is temporarily particularly strongly pressed against the outer surface of the support mold with the roller. A method for arranging a tire cord, comprising:

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