JP2021126844A - Apex attachment device and attachment method - Google Patents

Abstract

To provide an apex attachment device that can suppress generation of a gap between a starting end surface and a rear end surface of an apex attached to an outer peripheral surface of a core.SOLUTION: An attachment device comprises: a rotating mechanism 21 that rotates a core 4a in a circumferential direction while supporting the core 4a; an attaching member 40 that attaches an apex A to the core 4a, in a predetermined attachment position Pa in the circumferential direction of the core 4a; a supply guide 27 that guides the apex A to be supplied to the attachment position Pa; a moving mechanism 28 that moves the supply guide 27 along a supplying direction of the apex A; and a control device 14 that controls operation of the rotating mechanism 21 and of the moving mechanism 28. The control device 14 makes the rotating mechanism 21 rotate the core 4a while attaching a starting end part of the apex A to the core 4a and makes the moving mechanism 28 move the supply guide 27 toward the attachment position Pa in synchronization with the rotation.SELECTED DRAWING: Figure 12

Description

The present invention relates to a sticking device and a sticking method for sticking an apex to a core constituting a bead of a tire.

Tires used in vehicles are equipped with a tread that touches the ground, sidewalls that are connected to both sides of the tread in the axial direction and extend inward in the radial direction, and beads that are arranged at the radial inward ends of the sidewalls. There is. The bead is composed of a core formed in an annular shape by a metal such as steel, and an apex which is provided on the outer circumference of the core and is a rubber member having a substantially triangular cross section.

The following Patent Document 1 discloses a sticking device for sticking an apex on the outer peripheral surface of the core. In this affixing device, for example, as shown in FIG. 15A, the affixing roller 40 is positioned at the apex of the core 4a supported by the rotating mechanism 21, and the affixing roller 40 positions one end of the strip-shaped apex A in the longitudinal direction. (Starting end) is attached to the core 4a. Further, as shown in FIG. 15B, the sticking device sequentially sticks Apex A to the outer peripheral surface of the core 4a by rotating the core 4a in the circumferential direction (direction of arrow a) by the rotation mechanism 21. As shown in FIG. 15C, the sticking device cuts the apex A with a cutter before sticking the apex A on the entire outer peripheral surface of the core 4a, and the cut end of the apex by a joint device (not shown). The part (end part) is moved in the direction of arrow b and connected to the start end of Apex A. Apex A is guided by a sheath-shaped supply guide 27 in the process of reaching the sticking roller 40.

Japanese Unexamined Patent Publication No. 2004-202960

According to the diligent studies of the present inventors, the following new findings have been obtained.
That is, the band-shaped Apex A is attached to the outer peripheral surface of the core 4a, so that a difference in peripheral length is generated between the inner peripheral edge and the outer peripheral edge. Therefore, as shown in FIG. 15B, the outer peripheral edge of the Apex A is pulled in the direction opposite to the direction of the arrow a, and the starting end surface A1 is tilted so as to fall. Such tilting of the starting end surface A1 becomes remarkable due to the frictional resistance when the apex A passes through the supply guide. Then, the fall of the start end surface A1 causes a gap to be generated between the end ends of the Apex A when it is connected to the start end.

An object of the present invention is to provide an apex affixing device and a method capable of suppressing the occurrence of a gap between the start end surface and the rear end surface of the apex to be attached to the outer peripheral surface of the core.

(1) The present invention
A sticking device that sticks a band-shaped apex to the outer peripheral surface of the annular core that constitutes the bead of a tire.
A rotation mechanism that rotates the core in the circumferential direction while supporting the core,
A sticking member for sticking the apex to the core at a predetermined sticking position in the circumferential direction of the core,
A supply guide that guides the apex supplied to the attachment position,
A moving mechanism that moves the supply guide along the supply direction of the apex, and
It is provided with a control device for controlling the operation of the rotation mechanism and the movement mechanism.
In the control device, the core is rotated by the rotation mechanism in a state where the start end portion of the apex is attached to the core, and the supply guide is brought to the attachment position by the movement mechanism in synchronization with the rotation. Move towards.

With the above configuration, when the apex is attached to the outer peripheral surface of the core by the rotation of the core, the supply guide moves toward the attachment position in synchronization with the rotation of the core, so that between the supply guide and the apex. The frictional resistance of the apex is reduced, and the tipping on the starting surface of the apex is suppressed. Therefore, it is possible to suppress the occurrence of a gap between the start end surface and the end surface of the apex.

(2) Preferably, the sticking device has one cutter for cutting the apex, and the end surface of the apex stuck to the core by the cutter and then sticking to the core. It is provided with a cutting mechanism that forms the starting end surface of the apex.
In the case of the prior art, as shown in FIG. 15 (c), the end surface A2 of the apex is cut in an inclined shape so as to follow the inclination of the start end surface A1. However, the starting end surface A1 of the apex to be attached to the core 4a next needs to be a surface substantially perpendicular to the longitudinal direction of the apex A. Therefore, in the prior art, it is necessary to cut the apex A in two directions using two cutters, which generates a triangular scrap rubber G, and collects or disposes of the scrap rubber G. Complicated processing is required. In the present invention, since the fall of the starting end surface of the apex is suppressed, the apex can be cut at one place by one cutter, and the generation of scrap rubber can be suppressed.

(3) Preferably, the moving mechanism can move the supply guide between a first position closer to the sticking position and a second position farther from the sticking position than the first position.
The control device positions the supply guide at the first position by the moving mechanism when the starting end portion of the apex is attached to the outer peripheral surface of the core, and before rotating the core by the rotating mechanism, the control device said. The supply guide is moved from the first position to the second position by the moving mechanism, and when the core is rotated by the rotating mechanism, the supply guide is moved by the moving mechanism in synchronization with the rotation of the core. It is moved from the position to the first position.
With such a configuration, when the start end of the apex is attached to the outer peripheral surface of the core, the supply guide can be brought close to the attachment position to accurately position the start end of the apex, and then the apex is placed first. By retreating from the first position to the second position and then advancing toward the first position again, it is possible to suitably suppress the tilting of the starting end surface of the apex.

(4) Preferably, the sticking device includes a first holding mechanism for holding the apex when the supply guide moves from the first position to the second position.
With such a configuration, when the supply guide is retracted from the first position to the second position, it is possible to prevent the apex from retracting together and shifting the position.

(5) Preferably, a second holding mechanism for holding the apex in the supply guide is further provided.
The second holding mechanism approaches and separates between a holding position inside the inner surface of the supply guide and a release position outside the inner surface of the supply guide, and sandwiches the apex in the supply guide from both sides. It has a pair of holding claws.
According to this configuration, when the holding of the apex by the pair of holding claws is released, the holding claws are positioned at the release position outside the inner surface of the supply guide, so that the movement of the apex in the supply guide may be hindered. No.

(6) Preferably, the height of the apex is 20 mm or less.
In the case of the present invention, even when a weak apex having a height of 20 mm or less is used, it can be suitably attached to the core.

(7) The present invention
It is a method of pasting a band-shaped apex guided by a supply guide on the outer peripheral surface of the annular core that constitutes the bead of the tire.
A step of attaching the start end portion of the apex to the outer peripheral surface of the core at a predetermined attachment position in the circumferential direction of the core.
The process of rotating the core and
The step of moving the supply guide toward the attachment position in synchronization with the rotation of the core is included.

By the above method, when the apex is attached to the outer peripheral surface of the core by the rotation of the core, the supply guide moves toward the attachment position in synchronization with the rotation of the core, so that between the supply guide and the apex. The frictional resistance of the apex is reduced, and the tipping on the starting surface of the apex is suppressed. Therefore, it is possible to suppress the occurrence of a gap between the start end surface and the end surface of the apex.

According to the present invention, it is possible to suppress the generation of a gap between the start end surface and the rear end surface of the apex attached to the outer peripheral surface of the core.

It is a schematic side view of the bead manufacturing apparatus in one Embodiment of this invention. It is a side view which shows the sticking apparatus in a bead manufacturing apparatus. It is a top view which shows the sticking apparatus. It is a front explanatory view which shows the moving mechanism of a sticking apparatus. It is a side view which shows the 2nd holding mechanism of a sticking apparatus. It is a front view which shows the 2nd holding mechanism. It is a front view which shows the sticking mechanism of a sticking device. It is a front view which shows the 1st holding mechanism of a sticking apparatus. It is a front view which shows the joint mechanism of a sticking apparatus. It is a top view which shows the joint mechanism. It is a figure explaining the procedure of sticking apex to a core. It is a figure explaining the procedure of sticking apex to a core. It is a figure explaining the procedure of sticking apex to a core. It is sectional drawing which shows an example of a tire. It is a figure explaining the procedure of sticking apex to a core in the prior art. It is a figure explaining the state which positioned the start end of apex at the sticking position in the prior art.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[Tire composition]
FIG. 14 is a cross-sectional view showing an example of a tire.
In FIG. 14, the tire 1 has a tread 2, a sidewall 3 extending inward in the tire radial direction from both ends in the axial direction of the tread 2, and a bead located at the inner end in the tire radial direction of each sidewall 3. 4 and. Each bead 4 includes a ring-shaped core 4a.

A carcass 5 is bridged between the cores 4a on both sides in the axial direction, and a belt layer 6 is provided on the outer side of the carcass 5 in the radial direction of the tire and on the inner side of the tread 2. The carcass 5 is provided with folded portions 5b at both ends of the main body portion 5a extending from the tread 2 through the sidewall 3 to the core 4a so that the circumference of the core 4a is folded back from the inside to the outside in the tire axial direction. The bead 4 is provided with an apex 4b extending outward from the core 4a in the radial direction of the tire between the main body portion 5a and the folded portion 5b, and the apex 4b is reinforced from the bead 4 to the sidewall 3 to increase the lateral rigidity of the tire. ing.

The core 4a is formed in an annular shape by winding one or a plurality of (for example, two) bead wires in multiple rows and multiple stages. The vertical cross-sectional shape of the core 4a is formed into a rectangular shape such as a rectangle or a square, or a polygonal shape such as a hexagon. The bead wire is surrounded by a rubber layer.

[Structure of bead manufacturing equipment]
FIG. 1 is a schematic configuration diagram showing a bead manufacturing apparatus according to an embodiment of the present invention. In the following description, the direction indicated by the arrow X will be referred to as the front-back direction, and the horizontal direction orthogonal to the arrow X will be referred to as the left-right direction Y (see FIG. 3). Further, the right side of FIG. 1 is the front, and the left side of FIG. 1 is the back.

As shown in FIG. 1, the manufacturing apparatus 10 includes an extrusion apparatus 11, a transfer apparatus 12, and a pasting apparatus 13. The extrusion device 11, the transfer device 12, and the sticking device 13 are arranged side by side in the front-rear direction X. The operations of the extrusion device 11, the transfer device 12, and the pasting device 13 are all controlled by the control device 14. The extrusion device 11 molds a strip-shaped rubber member (hereinafter, also referred to as “belt-shaped apex A”) constituting the apex 4b (see FIG. 14). The extrusion device 11 has a screw mechanism 11a for transferring the rubber material, and an extrusion head 11b for forming the rubber material transferred by the screw mechanism 11a into the cross-sectional shape of the apex 4b. As shown in FIG. 14, the cross-sectional shape of Apex 4b is substantially triangular. The strip-shaped apex A extruded forward from the extrusion head 11b is sent to the transfer device 12.

The transport device 12 transports the strip-shaped Apex A formed by the extrusion device 11 to the sticking device 13. The transport device 12 has a feed roll 12a that transports the apex A. A festival 15 is provided between the extrusion device 11 and the transfer device 12 and between the transfer device 12 and the sticking device 13, respectively, in which the strip-shaped Apex A is loosened downward. The festival 15 can absorb the difference between the extrusion speed by the extrusion device 11 and the transfer speed by the transfer device 12, and the difference between the transfer speed by the transfer device 12 and the attachment speed by the attachment device 13.

(Structure of affixing device 13)
The sticking device 13 sticks the strip-shaped Apex A formed by the extrusion device 11 and transported by the transport device 12 to the outer peripheral surface of the annular core 4a. The sticking device 13 has a rotating mechanism 21, a supply mechanism 22, a sticking mechanism 23, a cutting mechanism 24, and a joint mechanism 25. These mechanisms are supported by a main frame 13A or the like installed on the floor or the like of a manufacturing factory.

FIG. 2 is a side view showing the sticking device 13 in the bead manufacturing device 10.
As shown in FIGS. 1 and 2, the rotation mechanism 21 supports the annular core 4a and rotates the core 4a in the circumferential direction. The rotation mechanism 21 has a plurality of support rollers 21a that support the core 4a from the inner peripheral side. One of the plurality of support rollers 21a is rotationally driven by a drive device (not shown) to rotate the core 4a in the circumferential direction (direction of arrow a).

FIG. 3 is a plan view showing the sticking device 13. FIG. 4 is a front view showing the supply mechanism 22 of the sticking device 13.
As shown in FIGS. 1 to 4, the supply mechanism 22 of the sticking device 13 supplies the strip-shaped apex A conveyed from the transfer device 12 to the rotation mechanism 21. The supply mechanism 22 includes a supply guide 27, a moving mechanism 28, and a second holding mechanism 29.

The supply guide 27 is a sheath-shaped member formed in a straight line. The supply guide 27 is arranged so that the longitudinal direction is along the front-rear direction X. As shown in FIG. 4, the supply guide 27 has a bottom plate 27a that supports the apex A from below, and a side plate 27b that supports the apex A from the side in the left-right direction Y. The apex A is arranged in a space surrounded by the bottom plate 27a and the side plate 27b, and the movement of the apex A to the rotation mechanism 21 along the front-rear direction X is guided by the supply guide 27.

As shown in FIGS. 2 to 4, the moving mechanism 28 moves the supply guide 27 in the front-rear direction X. The moving mechanism 28 has a first actuator 30 and a connecting member 31 that connects the supply guide 27 to the first actuator 30. The first actuator 30 of this embodiment is composed of an electric cylinder. The first actuator 30 moves the slider 30c in the front-rear direction X by the ball screw mechanism 30b driven by the motor 30a. The upper part of the connecting member 31 is connected to the slider 30c. A supply guide 27 is connected to the lower part of the connecting member 31.

The first actuator 30 is provided on the movable frame 33 supported by the main frame 13A. The movable frame 33 is movably supported on the main frame 13A in the front-rear direction X. The movable frame 33 has a first frame member 33a formed long in the front-rear direction X. A rail member 33a1 extending in the front-rear direction X is attached to the lower surface of the first frame member 33a. A guide shoe 13A1 slidably fitted to the rail is attached to the upper surface of the main frame 13A. The first frame member 33a is configured to be movable in the front-rear direction X by sliding the rail member 33a1 in the guide shoe 13A1.

The movable frame 33 includes a second frame member 33b extending forward (right side in FIGS. 2 and 3) from the first frame member 33a, and a third frame extending laterally (lower side in FIG. 3) from the first frame member 33a. It has a member 33c. A sticking mechanism 23 and a joint mechanism 25 are attached to the second frame member 33b. A cutting mechanism 24 is attached to the third frame member 33c.

The moving mechanism 28 further includes a second actuator 34, as shown in FIGS. 3 and 4. The second actuator 34 is attached to the main frame 13A and moves the movable frame 33 along the front-rear direction X. The second actuator 34 is composed of an electric cylinder. The second actuator 34 includes a piston rod 34c that moves in the front-rear direction X by a ball screw mechanism 34b driven by a motor 34a. The tip of the piston rod 34c is connected to the movable frame 33.

Therefore, by expanding and contracting the second actuator 34, the movable frame 33 moves in the front-rear direction X, and the supply guide 27 supported by the movable frame 33 via the first actuator 30 and the like also moves in the front-rear direction X. Therefore, the supply guide 27 moves in the front-rear direction X not only by the first actuator 30 but also by the second actuator 34. Further, when the second actuator 34 is expanded and contracted, the sticking mechanism 23, the joint mechanism 25, and the cutting mechanism 24 supported by the second frame member 33b and the third frame member 33c of the movable frame 33 also move in the front-rear direction X. .. Therefore, the supply mechanism 22, the sticking mechanism 23, the joint mechanism 25, and the cutting mechanism 24 are moved in the front-rear direction X as a whole by the second actuator 34.

FIG. 5 is a side view showing the second holding mechanism 29 of the sticking device 13. FIG. 6 is a front view showing the second holding mechanism 29.
The second holding mechanism 29 is provided in the middle of the supply guide 27 in the longitudinal direction. The second holding mechanism 29 sandwiches the apex A in the supply guide 27 from both the left and right sides, and restricts the movement of the apex A with respect to the supply guide 27. The second holding mechanism 29 has an actuator 36 and a pair of holding claws 37. The actuator 36 is composed of an air cylinder having a pair of sliders 36a that move toward and away from each other in the left-right direction Y. The actuator 36 is arranged below the supply guide 27.

The pair of holding claws 37 are attached to the slider 36a of the actuator 36, respectively. The pair of holding claws 37 include a mounting portion 37a attached to the slider 36a and arranged along the vertical direction, and a claw portion 37b bent from the upper end of the mounting portion 37a toward the supply guide 27 and arranged along the left-right direction. Has. An opening 27c is formed in the side plate 27b of the supply guide 27, and the tip of the claw portion 37b is positioned in the opening 27c. The pair of holding claws 37 are held by bringing the pair of sliders 36a of the actuator 36 closer to each other so as to enter inside the side plate 27b of the supply guide 27 in the left-right direction Y from the inner surface (the surface on which the pair of side plates 27b face each other). Apex A, which is positioned at the position and is located in the supply guide 27, is sandwiched and held from both the left and right sides. Further, the pair of holding claws 37 are positioned at a release position retracted to the outside in the left-right direction Y from the inner surface of the side plate 27b of the supply guide 27 by separating the pair of sliders 36a of the actuator 36. Release the hold.

FIG. 7 is a front view showing the sticking mechanism 23 of the sticking device 13.
The sticking mechanism 23 includes a sticking member 40, a slide mechanism 43, an elevating mechanism 41, and a first holding mechanism 42. The sticking member 40 is composed of a pair of left and right sticking rollers. In the following description, the sticking roller is designated by the same reference numeral 40 as the sticking member. The pair of sticking rollers 40 have holding surfaces 40a arranged so as to face each other. The pair of affixing rollers 40 press the apex A arranged between the outer peripheral portions of the two holding surfaces 40a against the outer peripheral surfaces of the core 4a supported by the rotation mechanism 21 (see FIG. 2) to attach the apex A. The pair of sticking rollers 40 rotate around a rotation shaft 48 inclined in the horizontal direction. Specifically, the pair of sticking rollers 40 are arranged so as to be inclined so that the distance between the holding surfaces 40a is wide on the upper side and narrow on the lower side. The Apex A is pressed against the core 4a in a state of being sandwiched from both the left and right sides by the holding surfaces 40a of the pair of sticking rollers 40.

In the following description, when referring to the position of the pair of sticking rollers 40 in the front-rear direction X, as shown in FIG. 2, the position of the lowermost end of the sticking rollers 40 (the position on the vertical line passing through the rotation axis 48a). Is the standard.

As shown in FIG. 7, the slide mechanism 43 has a support frame 44 that supports a pair of attachment rollers 40. The support frame 44 has a frame member 44a, a guide rod 44b, and a support bracket 44c. The frame member 44a has an upper plate 44a1 and a pair of side plates 44a2, and is formed in a gate shape in a front view. The guide rod 44b is bridged between the pair of side plates 44a2 of the frame member 44a. In the present embodiment, the two guide rods 44b are arranged side by side in the front-rear direction X. The support bracket 44c is formed long in the vertical direction, and its upper end is slidably attached to the two guide rods 44b in the horizontal direction Y. A sticking roller 40 is rotatably supported at the lower end of the support bracket 44c.

Actuators 50 are provided on each of the pair of side plates 44a2 in the frame member 44a of the support frame 44. The actuator 50 includes an air cylinder that expands and contracts in the left-right direction Y. The cylinder body 50a of the actuator 50 is attached to the side plate 44a2, and the piston rod 50b is connected to the support bracket 44c. When the actuator 50 expands and contracts, the support bracket 44c slides in the left-right direction Y along the guide rod 44b, and the distance between the pair of attachment rollers 40 fluctuates. By this variation in the interval, the interval between the pair of affixing rollers 40 can be adjusted according to the width of the apex A in the left-right direction Y, and the apex A can be sandwiched between the pair of apex rollers 40.

The elevating mechanism 41 has an actuator 45 and an elevating guide 46. The actuator 45 includes an air cylinder that expands and contracts in the vertical direction. The cylinder body 45a of the actuator 45 is attached to the second frame member 33b of the movable frame 33, and the piston rod 45b is attached to the support frame 44. When the actuator 45 is expanded and contracted, the support frame 44 moves up and down.

The elevating guide 46 has two guide cylinders 46a attached to the second frame member 33b and a guide rod 46b slidably attached to each guide cylinder 46a. The guide cylinder 46a and the guide rod 46b are arranged along the vertical direction. A support frame 44 is connected to the lower end of the guide rod 46b. Therefore, the guide cylinder 46a and the guide rod 46b guide the support frame 44 to move up and down by the actuator 45. The upper ends of the two guide rods 46b are connected to each other by a connecting plate 47.

FIG. 8 is a front view showing the first holding mechanism 42 of the sticking device 13.
As shown in FIG. 2, the first holding mechanism 42 is arranged on the rear side of the lowermost end of the pair of sticking rollers 40. As shown in FIG. 8, the first holding mechanism 42 has a pair of actuators 52 and a pair of holding members 53. The pair of actuators 52 are composed of air cylinders that expand and contract in the left-right direction Y. The cylinder body 52a of the actuator 52 is attached to the lower end of each support bracket 44c. The holding member 53 is attached to the tip of the piston rod 52b of the actuator 52. The holding member 53 is composed of a pin having a tapered tip. When the pair of actuators 52 are extended, the pair of holding members 53 approach each other, and the apex A arranged between the pair of affixing rollers 40 is sandwiched and held.

As shown in FIG. 3, the cutting mechanism 24 is attached to the third frame member 33c of the movable frame 33. The cutting mechanism 24 has an actuator 55 and a cutter 56. The actuator 55 is composed of an air cylinder, and the cylinder body 55a of the actuator 55 is attached to the third frame member 33c. The actuator 55 is attached to the third frame member 33c so as to expand and contract in a direction inclined with respect to the front-rear direction X and the left-right direction Y. The cutter 56 is attached to the tip of the piston rod 55b of the actuator 55.

When the actuator 55 extends, the cutter 56 enters between the supply guide 27 and the affixing roller 40 in the front-rear direction X, and cuts the apex A arranged between them. The cutting mechanism 24 of the present embodiment includes one cutter 56, and the apex A is cut at one place by the cutter 56. The front end of the apex A formed by cutting becomes the end of the apex A attached to the core 4a, and the rear end is the apex A then wound around the core 4a. It becomes the beginning of.

FIG. 9 is a front view showing the joint mechanism 25 of the sticking device 13. FIG. 10 is a plan view showing the joint mechanism 25.
As shown in FIGS. 2, 9, and 10, the joint mechanism 25 holds the vicinity of the end of the apex A wound around the core 4a (see FIG. 13), and the end of the apex A is the end of the apex A. Connect to the beginning. The joint mechanism 25 includes a swing frame 58, an actuator 59, a clamp portion 60, and a joint portion 61.

As shown in FIG. 2, the swing frame 58 is swingably supported by a support shaft 66 whose front end is arranged on the second frame member 33b of the movable frame 33 in the left-right direction Y. The swing frame 58 is provided with a clamp portion 60 and a joint portion 61.

The actuator 59 includes an air cylinder that expands and contracts in the vertical direction, and swings the swing frame 58 up and down. The upper end of the actuator 59 is attached to the second frame member 33b of the movable frame 33, and the lower end of the actuator 59 is attached to the swing frame 58.

As shown in FIGS. 9 and 10, the clamp portion 60 has a pair of clamp members 62 and an actuator 63. The pair of clamp members 62 clamp and hold the Apex A cut by the cutting mechanism 24 from both the left and right sides. The pair of clamp members 62 move toward and away from each other by the pair of actuators 63, respectively. The pair of actuators 63 are composed of air cylinders, each cylinder body 63a is attached to a swing frame 58, and a clamp member 62 is attached to the tip of a piston rod 63b. The pair of clamp members 62 clamp the end portion of the apex A cut by the cutter 56, and the swing frame 58 swings downward so that the end portion of the cut apex A is the outer periphery of the core 4a. Bring it closer to the surface (see FIG. 13B). Details will be described later with reference to FIGS. 11 to 13.

The joint portion 61 connects the end portion of the apex A after being cut by the cutter 56 to the start end portion of the apex A attached to the core 4a. The joint portion 61 has a pair of joint members 64 and an actuator 65. The pair of joint members 64 are brought close to each other by the pair of actuators 65. The actuator 65 is composed of an air cylinder, each cylinder body 65a is attached to a swing frame 58, and a joint member 64 is attached to the tip of a piston rod 65b. The pair of joint members 64 approach each other in a state where the end portion and the start end portion of the apex A wound around the core 4a are in contact with each other, and press and connect the start end portion and the end end portion of the apex A (FIG. FIG. 13 (b)). Details will be described later with reference to FIGS. 11 to 13.

As shown in FIG. 10, one joint member 64b is formed in a flat plate shape having a larger area than the other joint member 64a. Then, one of the joint members 64b also functions as a support plate that supports the apex A from the side opposite to the cutter 56 when the apex A is cut by the cutter 56.

The actuators of the respective mechanisms described above are operated and controlled by the control device 14 (see FIG. 1). The control device 14 includes, for example, a calculation unit such as a CPU, a storage unit such as a RAM and a ROM, and exerts a predetermined function when the calculation unit executes a program installed in the storage unit. The control device 14 receives signals from various sensors and signals from switches, and controls the operation of the actuator based on the input signals and the like.

(Operation of pasting device 13)
11 to 13 are views for explaining the procedure for attaching the strip-shaped Apex A to the core 4a.
Hereinafter, the operation of attaching the strip-shaped apex A supplied from the supply mechanism 22 to the core 4a held by the rotation mechanism 21 will be described in detail.

(1) In the present embodiment, the state shown in FIG. 11A is the initial state. Specifically, the sticking roller 40 is arranged at a position far behind the sticking roller 40 with respect to the core 4a supported by the rotating mechanism 21, and the supply guide 27 is arranged at a position far behind the sticking roller 40. .. Apex A is in a state of protruding from the front end of the supply guide 27 by about several tens of millimeters. The sticking roller 40 is positioned at the position by the second actuator 34 (see FIGS. 3 and 4) of the moving mechanism 28, and the supply guide 27 is the first actuator 30 (see FIGS. 2 to 4) and the second actuator 34. Is positioned at the above position. The position of the apex of the core 4a supported by the rotation mechanism 21 in the front-rear direction X is the attachment position Pa to which the apex A is attached.

(2) Next, as shown in FIG. 11B, the first actuator 30 advances the supply guide 27 to the vicinity of the sticking roller 40. By advancing the supply guide 27, the apex A in the supply guide 27 also advances. At this time, the tip end portion (starting end portion) of the Apex A protruding from the supply guide 27 is positioned at the lowermost end of the sticking roller 40 (on the vertical line passing through the axis 48a of the rotating shaft 48). In the pair of sticking rollers 40, the interval Y in the left-right direction is widened by the actuator 50 (see FIG. 7) until the start end portion of the apex A is inserted between the two, and the start end portion of the apex A is inserted. Then, the distance between the left and right directions Y is narrowed by the actuator 50, and the apex A is sandwiched from both the left and right sides.

(3) Next, as shown in FIG. 11C, the second actuator 34 advances the supply guide 27 and the sticking roller 40, and the lowermost end of the sticking roller 40 and the start end surface A1 of the apex A are moved from the sticking position Pa. Is also positioned at a predetermined position (operation start position) Pb several millimeters before. The apex A is in a state in which the starting end portion protrudes slightly downward from the sticking roller 40 and is in contact with the core 4a to be stuck. The position (tip position) of the supply guide 27 in the front-rear direction X at this time is also referred to as the first position P1.

(4) Next, as shown in FIG. 12A, the first holding mechanism 42 holds the Apex A, and the first actuator 30 retracts the supply guide 27 to position it at the predetermined second position P2. The second position P2 is a position recessed from the first position P1 by a predetermined distance (for example, about 50 mm to 100 mm). While the first actuator 30 retracts the supply guide 27, the first holding mechanism 42 holds the apex A so that only the supply guide 27 can be retracted independently. After that, the first holding mechanism 42 releases the holding of Apex A. With the above, the preparation for the sticking operation of Apex A is completed.

(5) Next, as shown in FIG. 12B, the rotation mechanism 21 rotates the core 4a, and the second actuator 34 advances the sticking roller 40 and the supply guide 27 in synchronization with this rotation. When the lowermost end of the sticking roller 40 is positioned at the sticking position Pa, the second actuator 34 stops, and then the first actuator 30 advances the supply guide 27 toward the first position P1 in synchronization with the rotation of the core 4a. .. The apex A is pulled forward by the rotation of the core 4a and is attached to the outer peripheral surface of the core 4a by the attachment roller 40. Here, "synchronization" means that the moving speed of the supply guide 27 or the moving speed of the sticking roller 40 is substantially matched with the rotation speed of the core 4a (moving speed of Apex A). As shown in FIG. 12 (c), the supply guide 27 advances to the vicinity of the sticking roller 40 and then retracts behind the joint mechanism 25.

(6) Next, as shown in FIG. 13A, when the apex A is attached to most of the outer peripheral surface of the core 4a, the rotation mechanism 21 is stopped and the clamp portion 60 of the joint mechanism 25 is apex. Hold A. Then, the cutter 56 of the cutting mechanism 24 cuts the apex A at the predetermined position Pc. After that, as shown in FIG. 13B, the second holding mechanism 29 holds the apex A in the supply guide 27, and the first actuator 30 retracts the supply guide 27. As a result, the cut Apex A is separated back and forth.

(7) Next, while the clamp portion 60 holds the apex A, the actuator 59 of the joint mechanism 25 swings the swing frame 58 (see FIG. 2) downward, and the terminal portion of the apex A is moved to the core 4a. Along the outer peripheral surface. At this time, the start end portion of the apex A attached to the core 4a and the end portion of the apex A are in a state where the start end surface A1 and the end surface A2 are butted against each other, or are slightly overlapped with each other. It will be in a state of Then, the joint portion 61 of the joint mechanism 25 presses the start end portion and the end portion of the Apex A from both the left and right sides, and connects the two.

(8) Finally, as shown in FIG. 13 (c), the clamp portion 60 and the joint portion 61 of the joint mechanism 25 release the holding and connection of the apex A, and swing upward by the actuator 59. Then, the rotation mechanism rotates the core 4a again, so that the end portion of the apex A is attached to the outer peripheral surface of the core 4a by the attachment roller 40. After that, the second actuator 34 retracts the entire supply guide 27, the sticking roller 40, the cutting mechanism 24, and the joint mechanism 25 to return to the state shown in FIG. 11A. After that, the above-mentioned work is repeated.

[Action and effect of this embodiment]
In the step (3) described above, for example, as shown in FIG. 16A, when the lowermost end of the sticking roller 40 and the starting end of Apex A are moved to the sticking position Pa in the direction of the arrow c (in the prior art). Case), as shown in FIG. 16B, the start end of Apex A is pushed forward while in contact with the outer peripheral surface of the core 4a, and the start end of Apex A is crushed or wrinkled. As shown in 16 (c), Apex A may fall in an unfavorable direction. Such a phenomenon becomes more remarkable as the height of Apex A becomes smaller and the waist becomes weaker. In this regard, in the present embodiment, as shown in FIG. 11C, the sticking roller 40 is stopped at a position Pb before the sticking position Pa, and then synchronized with the rotation of the core 4a in the step (5). Since the sticking roller 40 is advanced to the sticking position Pa, even if the apex A has a small height and a weak waist, the starting end portion may be crushed, wrinkles may occur, or the apex A may fall down. Can be suppressed, and poor sticking of Apex A can be reduced.

In the above steps (4) and (5), for example, when the core 4a is rotated without advancing the supply guide 27 from the second position P2 to the first position P1 (in the case of the prior art), the following Will be. That is, as shown in FIG. 15A, the core 4a is directly positioned by the rotating mechanism 21 at one end (starting end) in the longitudinal direction of the band-shaped Apex A at the apex of the core 4a supported by the rotating mechanism 21. Is rotated in the direction of the arrow a, and the difference in perimeter between the inner peripheral edge and the outer peripheral edge of the apex A caused by the apex A being attached to the core 4a. The starting end surface A1 of A is tilted so as to fall. Such tilting of the starting end surface A1 becomes remarkable due to the frictional resistance when the apex A passes through the supply guide 27. Further, the fall of the starting end surface A1 due to the difference between the inner and outer circumferences of the apex A or the frictional resistance of the supply guide 27 becomes more remarkable as the apex A has a smaller height and a weaker waist. Then, the fall of the start end surface A1 causes a gap to be formed between the start end surface A1 and the end surface A2 of the apex A.

In the present embodiment, as shown in FIG. 12 (a), the supply guide 27 is retracted from the first position P1 to the second position P2 in the step (4) described above, and then as shown in FIG. 12 (b). In addition, in the step (5), by advancing the supply guide 27 in synchronization with the rotation of the core 4a, the frictional resistance generated between the supply guide 27 and the apex A is reduced, and the starting surface of the apex A is reduced. The fall of A1 can be suppressed. Therefore, it is possible to suppress the occurrence of a gap between the start end surface A1 and the end surface A2 of the Apex A.

Further, when the start end surface A1 of the apex A collapses, as shown in FIG. 15 (c), the end surface A2 also needs to be cut in a similarly inclined state, and further, remains on the supply guide 27 side. Since the starting end surface A1 of the next apex A needs to be cut into a surface substantially perpendicular to the longitudinal direction of the apex A, it is necessary to cut the apex A at two places using two cutters. .. Triangular scrap rubber G is generated by cutting at these two places, and complicated processing such as collection and disposal of the scrap rubber G is required. In this respect, in the present embodiment, since the start end surface A1 of the apex A is suppressed from collapsing, the end surface A2 of the apex A can be cut by one cutter 56, and scrap rubber G is generated. Can be prevented.

In the present embodiment, since the sticking mechanism 23 includes the first holding mechanism 42 for holding the apex A, as shown in FIG. 12A, the supply guide 27 is moved from the first position P1 to the second position P2. The position of the start end surface A1 of the apex A can be appropriately maintained without retracting the apex A together with the supply guide 27 when the apex A is retracted to.

In the present embodiment, the supply mechanism 22 includes a second holding mechanism 29 for holding the apex A, and the second holding mechanism 29 has a holding position inside the inner surface of both side plates 27b of the supply guide 27 and both side plates. Since it has a pair of holding claws 37 that move closer to and away from the release position outside the inner surface of 27b in the left-right direction and sandwich the apex A from both the left and right sides, when the holding of the apex A is released. The holding claw 37 retracts from the inner surface of the side plate 27b of the supply guide 27 and does not hinder the movement of the apex A in the supply guide 27. Further, assuming that the apex A is sandwiched between one side plate 27b and the one holding claw 37, the apex A sticks to the one side plate 27b even after the holding of the apex A is released. , The movement of the apex A in the supply guide 27 may be hindered, but in the present embodiment, since the apex A is sandwiched between the pair of holding claws 37, the above-mentioned inconvenience does not occur. ..

As shown in FIG. 7, the holding surface 40a of the sticking roller 40 is formed in a structure without protrusions. If the rotating shaft 48, the hub to which the rotating shaft 48 is attached, or the like protrudes from the center of the holding surface 40a, the area of the holding surface 40a around the protruding portion is widened so that the protruding object does not come into contact with the apex. It must be secured, and the diameter of the sticking roller 40 must be increased accordingly. In the present embodiment, since the holding surface 40a of the sticking roller 40 is formed in a structure without protrusions, the diameter of the sticking roller 40 can be made as small as possible. By reducing the diameter of the sticking roller 40, as shown in FIG. 11B, the supply guide 27 can be brought as close as possible to the sticking roller 40, and the protruding length of the apex A from the supply guide 27 can be increased accordingly. Can be shortened. When the protruding length of the apex A from the supply guide 27 becomes long, the apex A hangs down due to its own weight or bends to the left or right, resulting in instability. Such a phenomenon becomes more remarkable in Apex A, which has a smaller height and a weaker waist. In the present embodiment, since the protruding length of the apex A from the supply guide 27 can be shortened, it is possible to suppress the apex A from hanging down or bending, and it is appropriate between the pair of affixing rollers 40. Apex A can be inserted.

The conventional sticking device is mainly used for sticking Apex A having a height of 25 mm to 55 mm to the core 4a, but the sticking device 13 of the present embodiment is described as described above, for example. Since it is possible to eliminate the inconvenience of using Apex A having a small height of 25 mm or less and further 20 mm or less and having a weak waist, for example, Apex A having a height of 10 mm to 25 mm, preferably about 15 mm to 25 mm. Even if it is, it can be suitably attached to the core 4a.

In the present embodiment, since the electric cylinder having a motor is used as the first actuator 30 and the second actuator 34, the position of the supply guide 27 and the position of the sticking roller 40 as described above are accurately controlled. This makes it possible to appropriately suppress the collapse of the start end surface A1 of the apex A and the collapse of the start end portion of the apex A. As the motors of the first and second actuators 30 and 34, for example, a servo motor can be applied.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-mentioned specific embodiments, but is modified to various embodiments.
For example, in the step (5) in the apex A attaching procedure, the second actuator 34 is operated and then the first actuator 30 is operated, but the first actuator 30 may be operated in the reverse order. In this case, the sticking roller 40 moves from the position Pb in front of the sticking position Pa to the sticking position Pa with a slight delay from the rotation of the core 4a.

Further, in the step (3) of the apex A sticking procedure, the lowermost end surface of the sticking roller 40 and the start end surface of the apex A are positioned at the sticking position Pa, and the second actuator 34 is operated in the step (5). Instead, the first actuator 30 may be operated to advance only the supply guide 27.

In the above embodiment, an electric cylinder and an air cylinder are used as the actuators used in each mechanism, but actuators of other forms may be used.

1: Tire 4: Bead 4a: Core 4b: Apex 13: Attaching device 14: Control device 21: Rotating mechanism 27: Supply guide 28: Moving mechanism 30: First actuator 34: Second actuator 40: Attaching member 42: First 1 Holding mechanism 56: Cutter A: Apex A1: Starting end surface A2: Ending surface P1: First position P2: Second position Pa: Pasting position

Claims (7)

A sticking device that sticks a band-shaped apex to the outer peripheral surface of the annular core that constitutes the bead of a tire.
A rotation mechanism that rotates the core in the circumferential direction while supporting the core,
A sticking member for sticking the apex to the core at a predetermined sticking position in the circumferential direction of the core,
A supply guide that guides the apex supplied to the attachment position,
A moving mechanism that moves the supply guide along the supply direction of the apex, and
It is provided with a control device for controlling the operation of the rotation mechanism and the movement mechanism.
In the control device, the core is rotated by the rotation mechanism in a state where the start end portion of the apex is attached to the core, and the supply guide is brought to the attachment position by the movement mechanism in synchronization with the rotation. Apex affixing device that moves toward. The affixing device has a cutter that cuts the apex, and the end surface of the apex that is attached to the core by the cutter and the start end of the apex that is then attached to the core. The apex affixing device according to claim 1, further comprising a cutting mechanism for forming a surface. The moving mechanism can move the supply guide between a first position closer to the sticking position and a second position farther from the sticking position than the first position.
The control device positions the supply guide at the first position by the moving mechanism when the starting end portion of the apex is attached to the outer peripheral surface of the core, and before rotating the core by the rotating mechanism, the control device said. The supply guide is moved from the first position to the second position by the moving mechanism, and when the core is rotated by the rotating mechanism, the supply guide is moved by the moving mechanism in synchronization with the rotation of the core. The apex affixing device according to claim 1 or 2, which moves from a position toward the first position. The apex affixing device according to claim 3, further comprising a first holding mechanism for holding the apex when the supply guide moves from the first position to the second position. A second holding mechanism for holding the apex in the supply guide is further provided.
The second holding mechanism approaches and separates between a holding position inside the inner surface of the supply guide and a release position outside the inner surface of the supply guide, and sandwiches the apex in the supply guide from both sides. The apex affixing device according to any one of claims 1 to 4, which has a pair of holding claws. The device for attaching an apex according to any one of claims 1 to 5, wherein the height of the apex is 20 mm or less. It is a method of pasting a band-shaped apex guided by a supply guide on the outer peripheral surface of the annular core that constitutes the bead of the tire.
A step of attaching the start end portion of the apex to the outer peripheral surface of the core at a predetermined attachment position in the circumferential direction of the core.
The process of rotating the core and
A method for attaching an apex, which comprises a step of moving the supply guide toward the attachment position in synchronization with the rotation of the core.

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