JPH06106651A - Cap ply molding device of car tire - Google Patents

Abstract

PURPOSE:To shorten the length of a ribbon for a cap ply on a winding completion side by cutting the ribbon immediately behind the press roller coming into contact with a belt molding drum when the winding of the ribbon is completed to straightly guide the ribbon to the belt molding drum without allowing the winding terminal of the ribbon to come into contact with the drum or to meander. CONSTITUTION:A freely advancing and retreating shaking block 40 is provided above a winding roller 15 and a press roller 41, a scissors type cutter 42 for cutting a ribbon for a cap ply and a suction pad 43 for sucking and holding the ribbon for the cap ply from above are successively attached to the shaking block 40 from the front to the rear and, when the press roller comes into contact with a belt molding drum, a lower swing roller 20 is moved in the rear upward direction of the suction pad.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for molding a cap ply that is wound on a belt located inside a tread when manufacturing an automobile tire.

[0002]

2. Description of the Related Art A device for forming a cap ply by winding a cap ply ribbon having several cords covered with a rubber in a coil shape on a belt at the time of secondary molding of an automobile tire. The device described in Japanese Patent Laid-Open No. 2-88224 is known. As shown in FIG. 2, this device is equipped with a winding roller 15 for guiding the cap ply ribbon R having several cords covered with rubber onto the belt forming drum 10.
The winding roller 15 while rotating the belt forming drum 10 at a position close to the surface of the belt forming drum 10.
Is designed to move in the width direction.

That is, the roller support base 11 for supporting the winding roller 15 is provided on a sliding frame (not shown) slidable in the width direction so as to be slidable forward and backward. The winding roller 15 is supported by the tip of the first rib 12 protruding from the upper surface of the support base 11 together with the air brake 16 for preventing inertial rotation, and the guide roller 17 is attached to the rear thereof. The rotary air cylinder 18 is fixed to the tip of the second rib 13 on the right side of the first rib 12, and the swing lever 1 is attached to the rotary shaft 18a.
A swing roller 20 is attached via 9 and rotates from a standby position indicated by a solid line to a front (drum side) position to an operating position indicated by an upper chain line.

A suction pad 22 fixed to a piston rod 21 of an air cylinder (not shown) between the swing roller 20 in this operating position and the winding roller 15 and moving back and forth is provided. A sandwiching cutter 24 having a cutting blade 23 for the cap ply ribbon R is provided between 22 and the swing roller 20 in the operating position so as to be slidable in the width direction, and further above the second rib 13. An upward pressing lever 26 which is driven by an air cylinder (not shown) and swings back and forth is swingably attached to the horizontal shaft 25, and a pressing roller having a guide groove for the cap ply ribbon R at its tip end. 27 is attached.

In this apparatus, when the winding of the cap ply ribbon R is completed and the rotation of the belt forming drum 10 and the sliding of the roller support base 11 in the width direction are stopped, the roller support base 11 is retracted and wound. The roller 15 is separated from the belt forming drum 10, and then the pressing arm 26 is driven to rotate so that the pressing roller 27 at the leading end is brought into pressure contact with the surface of the belt forming drum 10. On the other hand, the swing roller 20 turns upward to hook the cap ply ribbon R between the winding roller 15 and the belt forming drum 10 and lift it to the operating position indicated by the chain line. Then, the suction pad 22 moves forward, and the cap ply ribbon R that straddles the winding roller 15 and the swing roller 20 in the operating position is adsorbed and held on the front surface of the suction pad 22.
4 moves in the width direction to cut the cap ply ribbon R between the swing roller 20 and the suction pad 22 in the operating position. After that, the belt forming drum 10 rotates again, and the cut end of the cap ply ribbon R hanging from the swing roller 20 is wound up, and after passing the cut end under the pressing roller 27, it is stopped.

[0006]

In the above apparatus, the cap ply ribbon R is moved to the swing roller 20 in the operating position.
After cutting on the lower side of the belt forming drum 10, the cap ply ribbon R extending from the belt forming drum 10 to the cutting end is pressed by the pressing roller 27 to the belt forming drum 10. At the same time as the above-mentioned cutting, it is disengaged from the swing roller 20 by the impact accompanying the cutting, and hangs down from the contact portion between the pressing roller 27 and the belt forming drum 10 along the surface of the belt forming drum 10, and the hanging portion rotates for belt forming. Drum 1
No. 0 contacting the surface of the belt 0 and swaying, and the distance from the contact portion between the pressing roller 27 and the belt forming drum 10 to the cutting position of the cap ply ribbon R is long. Is long, and the meandering becomes large and it comes off from the ribbon guide groove on the surface of the pressing roller 27, so that the end portion of the cap ply ribbon R on the winding end side is not stuck straight, and manual correction is required. It was

According to the present invention, the cap ply ribbon R is cut immediately after the pressing roller, whereby the length of the hanging portion is shortened and the end portion of the cap ply ribbon on the winding end side is stuck straight. It eliminates the need for manual correction.

[0008]

In a cap ply molding apparatus for an automobile tire according to the present invention, several cords are covered with rubber on a roller support that can move in the width direction and the front-back direction with respect to a belt forming drum. A winding roller for guiding the formed cap ply ribbon onto the belt forming drum, and a swing roller that swings from a standby position below the winding roller to an operating position above the winding roller and above the winding roller. And a pressing roller that swings back and forth above the winding roller and presses the winding end end of the cap ply ribbon onto the belt forming drum at the end of winding the cap ply ribbon. In a cap ply molding apparatus for automobile tires, a swing block that can move forward and backward toward the belt molding drum above the winding roller. The rocking block is provided with the above-mentioned pressing roller, a sandwiching cutter for cutting the cap ply ribbon after the pressing roller, and a suction hold for the cap ply ribbon from above after the sandwiching cutter. The suction pads are attached in order, and when the pressing roller contacts the belt forming drum, the swing roller in the operating position is located above and above the suction pad.

[0009]

[Operation] When the winding of the cap ply ribbon is completed and the rotation of the belt forming drum and the sliding of the roller supporting base in the width direction are stopped, the roller supporting base retreats and the winding roller is used for belt forming as in the conventional case. Leave the drum. After that, the rocking block is moved forward to press the pressing roller at the front end of the rocking block into pressure contact with the belt forming drum, bend the cap ply ribbon from the belt forming drum toward the winding roller in the middle, and press into contact with the belt forming drum. To do. Next, the swing roller is swung from the lower standby position to the upper operating position through the front (drum side), and the cap ply ribbon between the winding roller and the pressing roller is hooked to move the suction pad rearward and upward. Lift to position.

When the swing roller rotates to the operating position, the cap ply ribbon is pushed up toward the downward suction port of the suction pad located at the rear end of the swing block, and is sucked and held by the suction port. The pinch type cutter operates to cut the cap ply ribbon between the suction pad and the pressing roller. In this case, since the above-mentioned nipping type cutter is located immediately behind the pressing roller, the distance from the cutting end to the nip portion of the pressing roller and the belt forming drum, that is, the end on the winding end side is significantly shorter than in the past and the meandering Is eliminated, and the end portion of the ribbon on the winding end side is smoothly and straightly attached to the belt forming drum.

[0011]

EXAMPLE In FIG. 1, 10 is a belt forming drum,
Reference numeral 15 is a winding roller, 17 is a guide roller, 18a is a rotary shaft of a rotary air cylinder 18 (see FIG. 2), 19 is a swing lever, and 20 is a swing roller. Lever 1
9 and the swing roller 20 are mounted on a roller support 11 (see FIG. 2) as in the conventional case, and can move forward and backward toward the belt forming drum 10 and traverse in the width direction of the belt forming drum 10. It is like this.

However, in this embodiment, the upper base 30 is integrally provided above the roller support base 11, and the pressing air cylinder 31 is provided on the upper base 30 so as to move the piston rod 32 forward (the belt forming drum). 10) and the L-shaped receiving base 33 is fixed to the tip of the piston rod 32. The L-shaped pedestal 33 is composed of an upper plate and a front plate, and a reversing air cylinder 35 is swingably mounted on the upper plate via a bracket 34 with its piston rod 36 facing forward. Rocking block 40 in the vertical direction via the bracket 37 on the front surface of the
The lower end of is connected swingably.

On the other hand, the tip of the piston rod 36 of the reversing air cylinder 35 is rotatably connected to the upper rear surface of the rocking block 40, and when the piston rod 36 of the reversing air cylinder 35 projects, the rocking block 40 rotates forward from the illustrated vertical standby position and is fixed in the horizontal operating position. Then, the pressing roller 4 for pressing the cap ply ribbon R to the belt forming drum 10 on the front surface of the swing block 40 at the standby position.
1. A sandwiching cutter 42 for cutting the cap ply ribbon R and a suction pad 43 for sucking and holding the cap ply ribbon R are located in order from top to bottom and directly above the winding roller 15. Is provided.

In the above structure, when the cap ply ribbon R is wound around the belt forming drum 10, the winding roller 15 is wound by the belt forming drum 1 as in the conventional case.
It is performed in a state of being in contact with the surface of 0 (see the chain line in FIG. 1).
Then, when the winding is completed, the winding roller 15 is retracted to the position indicated by the solid line, the rotation of the belt forming drum 10 is stopped, the reversing air cylinder 35 is driven, and the piston rod 36 of the revolving air cylinder 35 is projected to swing the block. 40 is tilted to a horizontal operating position, the pressing roller 41 is directed forward, and then the pressing air cylinder 31 is driven, and the piston rod 32 thereof is projected to cause the pressing roller 41 to move.
Pressed against the surface of the belt forming drum 10 like a chain line,
Thereby, the belt forming drum 10 and the winding roller 15
The cap-ply ribbon R connecting the two moves to the position of the chain line Ra.

Then, the swing lever 19 is driven in the same manner as in the conventional case, and the swing roller 20 is swung from the lower standby position to the upper operating position (see the chain line), and at that time, the pressing roller 41 is changed to the winding roller 15. The facing cap ply ribbon Ra is hooked by the swing roller 20 and moves to the upper bending position Rb, whereby the cap ply ribbon Rb in front of the swing roller 20 contacts the lower surface of the suction pad 43 of the swing block 40. Then, by closing the blade of the sandwiching cutter 42, the cap ply ribbon Rb between the pressing roller 41 and the suction pad 43 is cut. When the cutting is completed, the belt forming drum 10 is rotated again, the cap ply ribbon Rb up to the cutting end is wound up on the belt forming drum 10, and after the winding is completed, the belt forming drum 10 is finished. Stops rotating and the swing block 40 is returned to the original standby position.

In the above embodiment, the swing block 40
The inversion air cylinder 35 can be omitted and maintained in a horizontal state, and can be formed to swing back and forth in this horizontal state, and can be moved forward and backward by the pressing air cylinder 31. However, as in the above embodiment, the reversing air cylinder 3
5 is provided and the swing block 40 is vertically erected to stand by, the space between the swing block 40 at the standby position and the belt forming drum 10 is widened, and the workability is improved. .

[0017]

As described above, according to the present invention, an oscillating block which is capable of advancing and retracting toward the belt forming drum is provided above the winding roller, and the pressing roller, the sandwiching cutter and the suction pad are provided in front of the oscillating block. From back to back,
When the pressing roller contacts the belt forming drum,
Since the lower swing roller is moved to the upper rear side of the suction pad, the winding of the cap ply ribbon is completed, the winding roller is separated from the belt forming drum, and then the swing block is advanced. Then, the pressing roller at the front end of the rocking block is pressed against the belt forming drum, and then the swing roller is swung from the lower standby position to the upper operating position to move the above cap ply ribbon to the suction pad at the rear end of the rocking block. After being sucked and held by, the sandwiching cutter can be operated to cut the cap ply ribbon between the suction pad and the pressing roller.

In this case, since the above-mentioned clip-on cutter is located behind the pressing roller, the clip-on cutter can be made to approach immediately behind the press-down roller, and moreover there is a wide space for opening and closing the blade of the clip-on cutter. Can be taken.
Therefore, the distance from the cap ply ribbon cutting end to the nip portion between the pressing roller and the belt forming drum,
That is, the end on the winding end side is significantly shorter than before,
Therefore, the cut end does not come into contact with the surface of the belt forming drum to sway or meander, and the end portion of the ribbon on the winding end side is smoothly and straightly attached to the belt forming drum. Moreover, since the pressing roller, the sandwiching cutter and the suction pad are attached to the swing block, the device can be downsized.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment.

FIG. 2 is a perspective view of a conventional device.

[Explanation of symbols]

 R: Ribbon for cap ply 10: Belt forming drum 11: Roller support stand 15: Winding roller 17: Guide roller 19: Swing lever 20: Swing roller 22: Suction pad 24: Nipple cutter 26: Holding lever 27: Pressing lever Roller 30: Upper base 31: Air cylinder for pressing 33: L-shaped receiving base 35: Air cylinder for reversing 40: Swing block 41: Pressing roller 42: Nipple type cutter 43: Suction pad

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsuru Ichiyanagi 100 Fujinogi, Tianjin, Itami City, Hyogo Prefecture Toyo Rubber Industry Co., Ltd. Tire Technology Center

Claims (1)

[Claims] 1. A cap ply ribbon, which comprises a roller support that can be moved in a width direction and a front-back direction with respect to a belt forming drum, and several cords are covered with rubber, for guiding the belt to the belt forming drum. Wrapping roller,
A swing roller that swivels from a standby position below the winding roller to an operating position above the winding roller in front of the winding roller, and swings back and forth above the winding roller to end winding of the cap ply ribbon. In a cap ply molding device for an automobile tire, which is sometimes equipped with a pressing roller for pressing the winding end end of the cap ply ribbon onto the belt molding drum, the belt molding drum is positioned above the winding roller and toward the belt molding drum. An oscillating block that can move back and forth is provided, and the oscillating block is provided with the pressing roller, a sandwiching cutter for cutting the cap ply ribbon after the pressing roller, and a cap ply ribbon after the sandwiching cutter. Suction pads for sucking and holding from above are attached in order, and when the pressing roller contacts the belt forming drum, Serial cap ply molding of a motor vehicle tire, characterized in that the swing roller operating position above was positioned after the suction pad.