JPH09174716A - Manufacture of bead - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the bead having excellent bead durability by an efficient and simple mechanism. SOLUTION: The end Ws of starting to wind of a bead wire W deviated in parallel from the extending direction via the bent part is tightly held between the stationary bracket 60 of a chucking mechanism 58 and the former segment 54 of the chucking part 54, and disposed at the position deviated from a former groove 50. The former is rotated in this state with the main shaft as an axial center, and the end Ws of the wire W is wound in the groove 50 by deviating it from the inner periphery of the groove 50.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bead manufacturing apparatus, and more particularly to a bead manufacturing apparatus that contributes to improvement of tire durability performance.

[0002]

2. Description of the Related Art Conventionally, a bead for a tire has been manufactured by winding a bead wire into a homer groove of a bead home rotating around a main shaft. Here, when winding one bead wire into the homer groove, the tip of the bead wire is gripped and held in the wire chuck part arranged on the inner peripheral surface side of the bead home, and then the bead home is rotated and wound. There is a manufacturing apparatus for manufacturing beads. With this device, the bead wire can be removed from the homer when the bead wire is wound by a predetermined number of steps from the inner peripheral surface of the homer groove, or when the rear end of the bead wire has completed winding. ing.

In the above bead manufacturing apparatus, the wire chuck portion is provided on the bottom surface of the bead groove of the bead home, and the wire chuck portion holds the winding start end of the bead wire for winding. There is a winding start end on the inner peripheral surface of the bead.

[0004]

However, since the bead winding start end is present on the inner peripheral surface of the bead, the bead durability performance may be reduced by about 10 to 15%, and in order to compensate for this, the number of windings of the bead wire is increased. Is being done. As a result, the amount of bead wire required to manufacture one bead increases, and it takes time to manufacture, so that the production efficiency cannot be improved.

The present invention has been made in consideration of the above facts, and an object of the present invention is to provide a bead manufacturing apparatus capable of efficiently manufacturing beads that are excellent in bead durability performance and can contribute to improvement of tire durability performance. And

[0006]

According to a first aspect of the present invention, there is provided a bead manufacturing apparatus in which each stage is spirally aligned and wound in a plurality of stages based on rotation of a bead home having a homer groove formed in a circumferential shape. In the bead manufacturing apparatus that manufactures beads, the bead wire is provided in the vicinity of the homer groove and on substantially the same plane as one of the second and subsequent stages of the bead wire, and the winding start end of the bead wire is the first stage of the homer. Holding means for holding the portion apart from the groove and moving means for moving the winding start end of the bead wire to the winding position of the homer groove in synchronization with the winding operation of the step on the same plane as the holding means. It is characterized by that.

According to the first aspect of the invention, the winding start end held by the holding means at a position deviating from the homer groove on the substantially same plane as the second and subsequent bead wires is made to be the same plane by the moving means. Since it moves to the winding position of the homer groove in synchronism with the winding operation of another stage, the winding start end can be arranged in the second and subsequent stages of the homer groove by a simple operation in one direction. As a result, it is possible to obtain a bead in which the winding start end of the bead wire is not arranged on the inner peripheral side, so a bead wire that has excellent bead durability performance and contributes to improved tire durability performance with a simple mechanism without increasing the number of windings of the bead wire. It can be provided efficiently.

In a bead manufacturing apparatus according to a second aspect of the present invention, when the winding start end of the bead wire moved to the winding position by the moving means is continuously wound onto the bead wire, the bead wire is wound. The holding by the holding means is released by the winding pressure.

According to the second aspect of the present invention, since the winding start end of the bead wire is held by the holding means by the winding pressure of the bead wire which is wound over the winding start end after being moved by the moving means, it is special. A bead having no winding start end on the inner peripheral side can be efficiently manufactured with a simple structure without providing a holding release means.

According to a third aspect of the present invention, there is provided the bead manufacturing apparatus according to the first or second aspect, wherein the holding means includes a magnet capable of holding the bead wire.

According to the third aspect of the invention, since the winding start end of the bead wire is held by the holding means by the magnet,
The winding start end can be reliably held until the winding start position is moved to the winding position of the second and subsequent stages with a simple mechanism, and a bead having no winding start end on the inner peripheral side can be efficiently manufactured with a simple structure.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows a bead former 10 for bead production according to the present invention. A main shaft 14 is rotatably supported by a main body 12 arranged in the center of the bead home 10. A sprocket 16A is attached to one end side of the main shaft 14 which penetrates the main body 12 and is rotatable integrally with the main shaft 14. Corresponding to the sprocket 16A, a sprocket 16B is attached to the rotary shaft 20 of the motor 24 via a speed reducer 22.

A timing belt 18 is wound around the pair of sprockets 16A and 16B. Reducer 2
The rotary shaft 26 of the motor 24 serves as an input shaft, and the rotary shaft 20 serving as an output shaft 2 rotates at a predetermined reduction ratio.

As a result, when the driving force of the motor 24 is transmitted to the sprocket 16B via the decelerator 22 and the sprocket 16B rotates, the sprocket 16A integrally rotates via the timing belt 18, and together with the sprocket 16A, the main shaft is rotated. 14 is designed to rotate.

On the other hand, a pair of pushers 28 are provided near the main shaft 14 on the other end side of the main body 12. The pusher 28 is mainly composed of a cylinder, and the distal end portion of the pusher 28 can be moved in the lateral direction in FIG. 1 by expanding and contracting the rod.

A homer portion 32 is connected to the main shaft 14 via a flange 30. The homer unit 32 includes a slider 36 slidably attached to the main shaft 14 by a moving ring 34, and a fixing ring 38 fixed to the main body 14 side of the main shaft 14 with respect to the slider 36. Further, the tip end side of the main shaft 14 is reduced in diameter, and a moving ring 34 is axially supported by the base portion thereof, and a compression coil spring 40 is wound around the reduced diameter portion, so that the moving ring 34 is reduced in diameter. It is designed to bias toward the base side. As a result, the slider 36 is held at the position pressed by the moving ring 34.

A pressing member 42 is connected to the slider 36, and the other end of the pressing member 42 faces the tip of the pusher 28. As a result, the pusher 28 moves and comes into contact with the pressing member 42 and presses it in the right direction in FIG. 1, so that the moving ring 34 moves along the main shaft 14 against the biasing force of the compression coil spring 40. Has become. Along with this, the slider 36 integrated with the moving ring 34 moves in the same direction.

The slider 36 is connected to a diameter-reducing arm 46 via a link arm 44, and a ring-shaped homer 48 is attached to the tip of the diameter-reducing arm 46. The other end of the diameter-reducing arm 46 is slidably supported by a support post 52 protruding in the radial direction of the fixed ring 38.

The homer 48 is coaxial with the main shaft 14 and rotates together with the main shaft 14.
A homer groove 50 in which (see FIG. 2) is arranged and wound is formed. A bead wire supply device (not shown) is arranged near the homer groove 50, and the bead wire W is supplied to the homer 48 from a predetermined supply part.
The bead wire supply device is fixed, supplies the bead wire W from the tangential direction, and the bead wire W is sequentially wound around the homer groove 50 by rotating the homer 48. Both edges of the homer groove 50 project to form a homer segment 54, and the homer segment 54 on the main body 12 side is provided with a chuck portion 54C (see FIG. 2) having a partially different height from the homer groove 50. The chuck mechanism 58 is attached to the chuck portion 54C. The chuck mechanism 58 is provided with a winding start end Ws of the bead wire W that is supplied to the homer groove 50 and wound up.
(See FIG. 2).

Next, the chuck mechanism 58 will be described with reference to FIGS. The chuck mechanism 58 includes a fixed bracket 6 formed of an upper surface 60U and a side surface 60S.
0 is provided and is fixed to the side surface of the chuck portion 54C on the side surface 60S side of the fixed bracket 60. A gap having a height H (see FIG. 3) is formed between the upper surface 60U of the fixed bracket 60 and the homer segment 54 of the chuck portion 54C, and the pusher 62 is inserted therein. The height H of the gap between the homer segment 54 and the fixed bracket 60 is
Has a negative tolerance with respect to the outer shape of the bead wire W,
The bead wire W can be inserted tightly. Bead wire W of homer segment 54 and fixing bracket 60
An elastic member is attached to the contact surface with and so that the inserted bead wire W can be securely held.

As shown in FIG. 3, the chuck portion 54C.
The step D between the homer segment 54 and the inner peripheral surface of the homer groove 50 is substantially equal to the diameter of the bead wire W. Therefore, the bead wire W wound in the second stage and the inside of the fixed bracket 60 are accommodated. The pusher 62 and the pusher 62 are arranged on substantially the same plane. Pusher 6
A roller fixing portion 68 is connected to the main body 12 side of FIG. 2 (left side in FIG. 3) via a shaft 64 around which a spring 66 is wound, and a roller 70 is attached to the roller fixing portion 68 so that the direction of rotation of the homer 48 is It can rotate in the orthogonal direction.

On the other hand, as shown in FIG.
A moving mechanism 72 is provided on the main body 12 side. The moving mechanism 72 is fixed to a bracket 74, and the other end of the bracket 74 is fixed to a bead wire supply device (not shown). As a result, the homer 48 has the spindle 1
When moved in the direction of arrow R together with 4, the moving mechanism 72 moves relatively on the side surface of the homer 48.

The moving mechanism 72 is provided with a cam 76 having an inclination in the rotational direction of the homer 48, and a pressing portion 80 is connected to the cam 76 via a rod 78. Pressing part 8
The pressure control unit 82 is connected to 0, and the pressure control unit 8
The rod 78 is pushed to the homer 48 side based on the instruction from 2. As a result, the pressing portion 80 presses the rod 78 toward the homer 48 side, whereby the cam 76 moves from the basic position S to the pressing position P on the homer 48 side, and at the pressing position P, the roller 7 of the chuck mechanism 58 is moved.
It comes in contact with 0.

Next, the winding of the bead wire will be described. As shown in FIG. 3, in the homer groove 50, the bead wire W is wound and arranged, for example, 6 times. Note that FIG. 3 illustrates a state in which one bead wire W is wound around the homer groove 50 in the AA cross section in FIG. 2, and the numbers indicate the number of windings of the bead wire W in the chuck portion 54C. The position of the bead wire W is shown based on the numbers.

When the bead wire W is supplied to the homer 48, the winding start end Ws, which is deviated in parallel from the extension direction by the bent portion Wc (see FIG. 2), has a fixed bracket 60 of the chuck mechanism 58 and a homer of the chuck portion 54C. Holds tightly between segment 54. When the homer 48 rotates in a state where the winding start end Ws is located at a position deviated from the homer groove 50 by the curved portion Wc (see FIG. 2), the bead wire W extending to the winding start end Ws is wound into the homer groove 50. It is like this. Therefore, the bead wire W is wound up without disposing the winding start end Ws on the first stage of the homer groove 50.

On the other hand, the winding start end Ws is moved to the second winding position after the bead wires W are arranged and wound on the inner peripheral surface side of the homer groove 50.

That is, when the winding of the second stage is performed following the first stage and the winding position approaches the chuck portion 54C, as shown in FIG. 2, the cam 7 of the moving mechanism 72 is moved.
6 moves from the basic position S to the pressing position P, whereby the cam 78 comes into contact with the roller 70 and presses the pusher 62.
Is moved to the Houma groove 50 side. When the pusher 62 moves to the homer groove 50, the winding start end Ws is pushed out to the second-stage homer groove 50 on the same plane. The extruded winding start end Ws is continuously wound around the bead wire W which is arranged at the winding position of the second stage and is arranged and wound in the second stage. Next, the bead wire W is overlapped on the winding start end Ws and wound as a third step.

Next, the operation of the bead homer 10 will be described. When the pair of sprockets 16A and 16B are rotated by driving the motor 24, the sprocket 16
The main shaft 14 connected to A rotates in the same direction. Spindle 1
When rotating 4, the homer 48 rotates with the main shaft 14,
A bead wire W is supplied from a bead wire supply device (not shown) arranged in the vicinity of the homer 48, and the bead wire W is sequentially supplied to the homer groove 50 of the rotating homer 48 based on a predetermined winding operation by the chuck mechanism 58 and the moving mechanism 72. It will be rolled up.

When the winding is completed, the pusher 28 attached to the main body 12 presses the pressing member 42, whereby the slider 36 moves. When the slider 36 is pushed out and moves, the diameter-reducing arm 46 connected to the slider 36 via the link arm 44 moves on the support post 52 to the main shaft 14 side to reduce the diameter, and the homer 48 is moved to the main shaft 14.
Move to the side.

By moving the homer 48 toward the main shaft 14, the inner circumference of the bead wire W wound around the homer groove 50 and the inner circumference of the homer groove 50 are separated, and the bead is separated from the homer 48.

Next, the chuck mechanism 58 and the moving mechanism 72.
The operation of will be described. When the bead wire W is supplied from a bead wire supply device (not shown) while the cam 76 is at the basic position S, the winding start end Ws of the bead wire W is
Is placed at a position 1 on the homer segment 54 of the chuck portion 54C and fixed (chuck) (see FIG. 2). At this time, the winding start end Ws of the bead wire W is held by the crimping force between the fixing bracket 60 and the homer segment 54.

As shown in FIG. 4A, when the winding start end Ws of the bead wire W is held by the chuck mechanism 58,
The homer 48 rotates to move the bead wire W to the homer groove 50.
The first winding step is performed while sequentially arranging the positions from 2 to 7 from the side where the chuck mechanism 58 is disposed along the inner peripheral surface of the second step, and the second step winding is started from the 8th position after the 7th position.

When the winding of the second stage bead wire W progresses and the winding is completed up to the position 12, the moving mechanism 7
Pressing is instructed to the second pressing control unit 82, and the cam 76 disposed near the chuck mechanism 58 is pressed toward the homer groove 50 and moved to the pressing position P.

When the cam 76 moves to the pressing position P, the cam 76 comes into contact with the roller 70 of the chuck mechanism 58 and moves the roller 70 to the homer groove 50 side.

As shown in FIG. 4B, the roller 70
When is moved toward the home groove 50 side, the pusher 62 connected to the roller 70 pushes out the winding start end Ws in the arrow M direction. As a result, the winding start end Ws moves to the homer groove 50 side on substantially the same plane, and is arranged adjacent to the bead wire W at the 12th position and overlapping the bead wire W at the 2nd position.
Since the winding start end Ws was held by the crimping force between the homer segment 54 and the fixing bracket 60,
By moving to the homer groove 50, the chuck mechanism 5
8 is released.

As shown in FIG. 4C, the winding start end W
When s is placed in the home groove 50, the bead wire W is wound up at the next 13 positions overlapping the winding start end Ws.

On the other hand, when Ws, which has started to be wound, moves to the homer groove 50 and is wound up, the pressing controller 82 instructs the cam 76 to move back to the basic position S, and the pusher 62 causes the spring 66 to move. The urging force moves the inside of the fixed bracket 60 to the main body 12 side.

The winding of the bead wire W in the homer groove 50 is completed when the bead wire W is wound in the homer groove 50 in a predetermined number of steps or when the winding end end is wound in the homer groove 50.

As a result, it is possible to obtain a bead having excellent bead durability performance in which the winding start end Ws is not arranged on the inner peripheral side with an efficient and simple structure, and by using this bead, the tire durability performance is improved. Can be improved.

In the present embodiment, the winding start end Ws of the bead wire W is wound as the second step in the homer groove 50, but the present invention is not limited to this as long as it is not the inner peripheral surface of the homer groove 50. For example, the homer segment 5 of the chuck portion 54C
By increasing the height of 4, it is possible to arrange the third and subsequent stages. In this case, the bead wire W to be wound immediately after is wound based on the winding order in the home groove 50.
It is preferable that the position is such that it can be crimped by and can be separated from the pusher 62. In addition, another winding mechanism may be provided to crimp the winding start end Ws with the bead wire W that is wound into the homer groove 50 so that the winding start end Ws can be separated from the pusher 62. It can be wound at a position that is not on the peripheral surface side.

[Second Embodiment] FIG. 5 shows another chuck mechanism 200 and moving mechanism 220 applicable to the bead homer 10.

The chuck mechanism 200 is provided with a cam 202 having a chuck surface 202C as a holding means,
The pin 204 is rotatably arranged on the homer segment 54 of the chuck portion 54C.

The chuck surface 202C of the cam 202 is provided obliquely to the homer groove 50, and the winding start end Ws is held along the chuck surface 202C.
A magnet 206 is fixed to the chuck surface 202C along the surface, and the winding start end Ws of the bead wire W can be bonded by magnetic force.

A hole 210 is formed in the vicinity of the side of the cam 202 where the pin 204 is provided, and one end of a coil spring 208 is inserted and attached. The other end of the coil spring 208 is inserted into a pin hole 214 provided at the tip of a pin 212 protruding on the side surface of the homer segment 54 on the front side in the rotation direction of the homer 48 (direction of arrow R), whereby the cam 2
02 is held at a position based on the biasing force of the coil spring 208.

The moving mechanism 220 provided corresponding to the chuck mechanism 200 has a moving roller 22 at the tip of the rod 78.
2 is rotatably arranged. The moving roller 222 is
The pressing unit 80 moves from the basic position S to the pressing position P based on an instruction from the pressing control unit 82.

When the moving roller 222 is arranged at the pressing position P, it can come into contact with the contact surface 202T of the cam 202, and when the homer 48 rotates in the R direction, the moving roller 222 is contacted with the contact surface 202T of the cam 202. To move. The movement of the moving roller 222 causes the cam 202 to move to the coil spring 2.
08 against the contact surface 202T while resisting the biasing force of 08.
It is designed to move closer to the 0 side.

Next, the winding of the bead wire W by the chuck mechanism 200 will be described. As shown in FIG. 5, the winding start end Ws of the bead wire W extends obliquely from the bent portion Wc to the outside of the homer groove 50, deviates from the winding position, and is contacted along the magnet 206 of the cam 202,
It is adapted to be held by the chuck mechanism 200. The bead wire W is wound in the homer groove 50 from the first step in contact with the inner peripheral surface as the homer 48 rotates in the direction of arrow R while the winding start end Ws is held by the chuck mechanism 200. ing.

As shown in FIG. 6, the winding start end Ws is moved to the homer groove 50 after the winding progresses and the winding is completed up to the position 12. The moving roller 222 provided in the moving mechanism 220 moves from the basic position S to the pressing position P, whereby the cam 202 moves the home groove 50.
Winding start end Ws that has moved to the side and is bonded to the magnet 206
Are arranged at the final winding position (the position indicated by the dotted line in FIG. 6) of the second step of the homer groove 50.

The beat wire W is wound around the winding start end Ws at a predetermined winding pressure after being arranged at the winding position. The winding start end Ws adhered to the magnet 206
Is the home groove 50 depending on the winding pressure of the bead wire W.
Since the moving roller 222 moves to the basic position S in this state because it is pressure-bonded in the direction, it is detached from the magnet 206 and the holding by the cam 202 is released.

Next, the chuck mechanism 20 according to the present embodiment.
The operation of 0 and the moving mechanism 220 will be described.

When the bent winding start end Ws of the bead wire W is supplied to the chuck mechanism 200, the winding start end Ws
Adheres to the magnet 206 of the cam 202 in which the chuck portion 54C is arranged. In this state, the homer 48 has the spindle 14
By rotating together with it (in the direction of arrow R in FIG. 6), the bead wires W are arranged on the inner peripheral surface side of the homer groove 50 in order from the arrangement side of the chuck mechanism 200 and wound from the first stage.

When the winding position reaches the final position of the second stage (the position indicated by the dotted line in FIG. 6), the pressing control unit 82 of the moving mechanism 220 instructs the pressing unit 80 to return the rod 78 to the homer 48 side. The moving roller 222 is pushed out and moves to the pressing position P.

When the moving roller 222 moves to the pressing position P, the moving roller 222 contacts the contact surface 202T of the cam 202 and presses the contact surface 202T based on the rotation of the homer 48.
When the moving roller 222 presses the contact surface 202T, the cam 202 rotates around the pin 204 against the biasing force of the coil spring 208, and the chuck surface 20 of the cam 202 is moved.
2C is moved to the Houma groove 50 side. Chuck surface 202C
Of the winding start end Ws adhered to the magnet 206 attached to the chuck surface 202C by the movement of
Move to.

When the winding start end Ws moves to the homer groove 50, the winding start end Ws is placed at the last position of the second step of the homer groove 50 (the position indicated by the dotted line in FIG. 6) and wound up, and subsequently the bead wire W is fixed. It is repeatedly wound up with the winding pressure of.

When the bead wire W is wound on the winding start end Ws, the pressing control section 82 instructs the moving roller 222 to move from the pressing position P to the basic position S, and the cam 202 causes the coil 202 to coil. It rotates based on the biasing force of the spring 208 and moves the chuck surface 202C onto the chuck portion 54C. When the chuck surface 202C is moved to the chuck portion 54C, the winding start end Ws, which is pressed against the homer groove 50 side by a constant winding pressure, is separated from the magnet 206 attached to the chuck surface 202C, and the holding is released. To be done. The winding of the bead wire W is continued when the winding is performed in a predetermined number of stages or until the winding end end is wound.

As a result, it is possible to efficiently and easily obtain a bead having excellent bead durability performance in which the winding start end Ws is not arranged on the inner peripheral surface of the homer groove 50.

[Third Embodiment] FIG. 7 shows another chuck mechanism 300 applicable to the bead homer 10 and a moving mechanism 220.

The chuck mechanism 300 is provided with a pusher 302 having a substantially T shape. In the pusher 302,
A sliding groove 306 extending in a direction orthogonal to the rotation direction of the homer 48 is formed. By inserting the pin 304 into the sliding groove 306, the pusher 302 is attached to the upper surface of the homer segment 54 of the chuck portion 54C. Houma groove 5
It is attached so that it can approach or leave 0.

Homer segment 54 of chuck portion 54C
A retaining bracket 308 is fitted on the upper portion and is fixed to the homer segment 54 by a pin (not shown). An insertion port 308A is provided on a side surface of the holding bracket 308 on the side of the moving mechanism 220, and a moving path 308B (see FIG. 8) having a height J is formed.
8B penetrates the homer groove 50. A part of the pusher 302 is inserted into the insertion opening 308A,
The pusher 302 is movable in the moving path 308B (see FIG. 8). Further, the holding bracket 308 includes
A holding groove 310, which is parallel to the homer groove 50 on the side where the pusher 302 is disposed, and which approaches the homer groove 50 toward the front side in the rotational direction of the homer 48, is provided open to the front side of the paper surface of FIG. 7.

The pusher 302 has a compression coil spring 312.
Is attached and is arranged at a position based on the biasing force of the compression coil spring 312. This allows
The pusher 302 is the main body 12 of the homer 48 (see FIG. 1).
It is attached to the side surface, and the pressing surface 302P is arranged at a substantially central portion of the homer segment 54.

A contact surface 302T is provided on the moving mechanism 220 side of the pusher 302, and when the homer 48 rotates in the direction of arrow R with the moving roller 222 placed at the pressing position P, the contact surface 302P moves. It comes into contact with 222.

As shown in FIG. 8, the magnet 3 is attached to the homer segment 54 on the winding start end Ws arrangement side of the holding groove 310.
16 are arranged. Accordingly, the winding start end Ws of the bead wire W arranged in the holding groove 310 is held in the holding groove 310.
Are held by the magnet 316 inside the holding groove 310.

Next, the winding of the bead wire W by the chuck mechanism 300 will be described. As shown in FIG. 7, the winding start end Ws of the bead wire W is deviated in parallel to the homer groove 50 side along the shape of the holding groove 310 of the holding bracket 308 with the bent portion Wc as a boundary.
When the winding start end Ws is supplied to the holding bracket 308, it can be accommodated along the holding groove 310. When the winding start end Ws is accommodated in the holding groove 310, the winding start end Ws is held by the magnet 316 arranged on the homer segment 54 on the pusher 302 side.

The bead wire W has the winding start end Ws at the magnet 3
While being held by 16, the homer 48 rotates (in the direction of arrow R in FIG. 7) to cause the homer groove 50 to move.
Is rolled up. As a result, the winding start end Ws is not arranged on the inner peripheral surface of the homer groove 50.

As shown in FIG. 8, the winding start end Ws is moved to the winding position after the winding progresses and the winding is completed up to the position 12. When winding the winding start end Ws, the moving roller 222 of the moving mechanism 220 moves from the basic position S to the pressing position P based on an instruction from the pressing control unit 82, and the pusher 302 moves the pusher 302 to the home groove 50.
Press to the side. When the pusher 302 is pressed toward the homer groove 50, the pusher 302 moves in the same direction, and the pressing surface 302P of the pusher 302 presses the winding start end Ws adhered to the magnet 316 in the movement path 308B. As a result, the winding start end Ws moves along the moving path 308B in the home segment 54.
And is placed at the last winding position of the second step of the homer groove 50 (the position indicated by the dotted line in FIG. 8). The winding start end Ws is released from the holding by the magnet 316 by moving from the position on the magnet 316 by pressing the pusher 302.

Next, the chuck mechanism 30 according to the present embodiment.
The operation of 0 and the moving mechanism 220 will be described.

When the winding start end Ws of the bead wire W is supplied to the chuck mechanism 300, the winding start end Ws is accommodated in the holding groove 310 of the holding bracket 308 and moved to the moving path 308B.
Magnet 316 located on internal homer segment 54
Hold with.

By rotating the homer 48 in the direction of arrow R in this state, the bead wire W is wound around the inner peripheral surface of the homer groove 50 from the first step. When the winding position of the bead wire W reaches the position closest to the holding bracket 308 in the second stage, the pressing controller 82 of the moving mechanism 220 instructs the moving roller 222 to move to the pressing position P, and the homer 48 rotates. The contact surface 302T of the pusher 302 is brought into contact with the pusher 302, and thereby the pusher 302 is moved toward the homer groove 50.

The pusher 3 is contacted by the contact of the moving roller 222.
When 02 moves, the pressing surface 302P moves in the direction of the homer groove 50 accordingly, and the winding start end Ws held by the magnet 316 of the holding groove 310 moves in the direction of the homer groove 50. The winding start end Ws is fixed to the home groove 5 by the pressing surface 302P.
By moving in the 0 direction, the holding of the magnet 316 is released.

The magnet 316 is moved to the home groove 50.
The winding start end Ws that has been released from the holding is disposed at the winding position and is wound into the homer groove 50 based on the rotation of the homer 48. When the winding start end Ws is wound, the bead wire W is wound on the winding start end Ws.

When the bead wire W is wound on the winding start end Ws, the pressing control unit 82 instructs the moving roller 222 to move from the pressing position P to the basic position S, and the pusher 302 is compressed accordingly. The urging force of the coil spring 314 causes the moving mechanism 222 to move. The bead wire W having the winding start end Ws wound around the homer groove 50 continues to be wound until a predetermined number of windings is reached or the winding end is wound up.

As a result, it is possible to obtain a bead having excellent bead durability performance which does not dispose the winding start end Ws on the inner peripheral surface of the homer groove 50, with an efficient and simple structure.

In the embodiment of the present invention, the winding start end Ws is held by the pressing force and the magnetic force, but the present invention is not limited to this as long as the same effect can be obtained. For example, the shape of the winding start end Ws may be retained as a hook shape.
In this case, at the time of returning to the homer groove 50, the shape is changed so as not to hinder the winding and the winding is performed.

[0075]

As described above, according to the present invention, the winding start end held by the holding means is moved to the winding position after the second stage of the homer groove by the moving means in synchronization with the winding operation. Since the winding start end can be placed after the second step of the homma groove by performing a simple operation, the winding start end of the bead wire is not placed on the inner circumference side. Excellent bead durability performance and improved tire durability performance. The contributing bead wire can be efficiently provided.

Further, since the holding means for releasing the winding start end of the bead wire by the returning means is released by applying a constant winding pressure on the winding start end after the movement so as to wind the layers one by one, a special releasing means is provided. Without providing, it is possible to manufacture a bead having a simple structure and excellent in durability performance in which there is no winding start end on the inner peripheral surface side.

Furthermore, since the winding start end is held and released from the holding by a simple mechanism by providing a magnet in the returning means, the winding start end does not exist on the inner peripheral surface side with a simple structure, and the durability is excellent. Bead can be manufactured.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view of a bead home according to an embodiment of the present invention.

FIG. 2 is a schematic plan view of a chuck mechanism and a moving mechanism according to the first embodiment of the present invention.

3 is a schematic sectional view taken along line AA of the chuck mechanism in FIG.

FIGS. 4A to 4C are diagrams illustrating winding of a bead wire by a chuck mechanism and a moving mechanism according to the first embodiment.

FIG. 5 is a schematic plan view of a chuck mechanism and a moving mechanism according to a second embodiment of the present invention.

6 is a schematic sectional view taken along line AA of the chuck mechanism in FIG.

FIG. 7 is a schematic plan view of a chuck mechanism and a moving mechanism according to a third embodiment of the present invention.

8 is a schematic sectional view taken along line AA of the chuck mechanism in FIG.

[Explanation of symbols]

 10 Bead Homer (Bead Manufacturing Apparatus) 14 Spindle 48 Homer 50 Homer Groove 58 Chuck Mechanism (Holding Means) 72 Moving Mechanism (Moving Means) 76 Cam 82 Pressing Control Unit 200 Chuck Mechanism (Holding Means) 202 Cam 206 Magnet 220 Moving Mechanism (Movement) Means) 222 moving roller 300 chuck mechanism (holding means) 302 pusher 310 holding groove 316 magnet (magnet) W bead wire Ws winding start end

Claims (3)

[Claims] 1. A bead manufacturing apparatus for manufacturing a bead by spirally aligning and winding a bead wire in a plurality of stages based on rotation of a beaded homer groove having a homer groove formed in a circumferential shape. Holding means provided in the vicinity and substantially on the same plane as any of the second and subsequent stages of the bead wire, for holding the winding start end of the bead wire while deviating from the homer groove of the first stage, and the holding means. In synchronism with the winding operation of the same step as
A bead manufacturing apparatus comprising: a moving unit that moves a winding start end of the bead wire to a winding position of the homer groove. 2. The holding means for releasing the winding start end of the bead wire moved to the winding position by the moving means by the winding pressure when continuously winding the bead wire in an overlapping manner. The bead manufacturing apparatus according to claim 1. 3. The bead manufacturing apparatus according to claim 1, wherein the holding means includes a magnet capable of holding the bead wire.