JPH06305047A - Apparatus for setting apex part of narrow belt-like member - Google Patents

Abstract

PURPOSE:To perform surely contact bonding of the apex part of a narrow belt-like member on the outer periphery of a molding drum over a wide range. CONSTITUTION:When the apex part of a narrow belt-like member S is set, as the apex part is pressed on a molding drum 11 (a belt band B) by means of an arc-shaped face 26 of a setting member 20 rotating by following the molding drum 11, the contact bonding region on the molding drum 11 is gradually expanded from the apex end to the back. Therefore, when the setting is finished, a wide region which is approximately the same distance as the distance in the peripheral direction of the arc-shaped face 26 is contact-bonded to make the contact bonding sure and strong.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a setting device for setting the front end of a narrow strip member by pressure-bonding it to the outer periphery of a molding drum.

[0002]

2. Description of the Related Art As a conventional tip end portion setting device for a narrow strip member, for example, a device described in Japanese Patent Application Laid-Open No. 2-88224 is known. This is a narrow strip extending in a straight line, that is, after a ribbon is adsorbed by a suction pad, the ribbon downstream from the suction pad is cut by a sandwiching cutter to adsorb the tip of the ribbon to the suction pad. Then, the suction pad that adsorbs the tip of the ribbon is brought close to the outer periphery of the forming drum to press the tip of the ribbon onto the outer periphery of the forming drum, and then the tip is released from adsorption by the suction pad. The tip of the ribbon is set at a predetermined position on the outer circumference of the forming drum.

[0003]

However, in such a conventional setting device, since the ribbon when attracted by the suction pad extends linearly between the rollers, it faces the ribbon of the suction pad. The attracting surface of the ribbon is flat, and as a result, the tip of the ribbon attracted to the attracting surface of the suction pad is also flat. When the suction pad that sucks such a flat ribbon is pressed against the outer circumference of the cylindrical forming drum, the flat surface and the cylindrical surface come into contact with each other. The pressure is applied only in an extremely narrow area, and as a result, the pressure to attach the ribbon to the forming drum is weakened, and the tip of the ribbon may easily slip off or peel off from the forming drum. is there.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a narrow band-shaped member tip portion setting device capable of reliably crimping the tip portion of the narrow band member to the outer periphery of the molding drum over a wide range.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a narrow band-shaped member tip end setting device for crimping and setting the front end of the narrow band-shaped member on the outer periphery of a molding drum, the outer end in the radial direction. Has an arcuate surface on which a plurality of suction ports for suction-holding the narrow strip member are formed, and is free to rotate about a rotation axis that is parallel to the axis of the molding drum and located near the center of curvature of the arcuate surface. A set member, a contacting / separating means for moving the set member toward and away from the outer periphery of the molding drum, and a drive means connectable to the set member and drivingly rotating the set member about the rotation axis when connected to the set member. , And the set member holding the narrow strip-shaped member by suction is brought closer to the forming drum by the contacting / separating means and driven and rotated by the driving means to form the tip of the narrow strip-shaped member. After pressing against the outer periphery of the ram, the set member is separated from the drive means to allow free rotation, the molding drum is rotated around the axis, and the narrow strip member is released from the suction holding of the set member. This can be achieved by pressing the tip end of the narrow strip-shaped member against the outer periphery of the forming drum by the arcuate surface of the set member that rotates following the forming drum, and gradually pressing the tip end.

[0006]

Now, it is assumed that the tip end of the narrow strip member is sucked and held by the suction port formed on the arc-shaped surface of the setting member.
At this time, the set member is brought closer to the outer periphery of the forming drum by the contacting / separating means, and the set member is driven and rotated about the rotation axis by the drive means connected to the set member to form the tip of the narrow strip member. Press on the outer circumference of the drum. Next, the setting member is separated from the driving means so that it can be freely rotated, and the forming drum is rotated around the axis. As a result, the set member pressed against the forming drum by the contacting / separating means receives the driving force from the forming drum and rolls in contact with the forming drum to follow and rotate. At this time, the narrow strip member is released from the suction holding of the setting member. As a result, the tip end portion of the narrow strip member is gradually pushed rearward from the tip end to the outer periphery of the forming drum by the arcuate surface of the set member pressed against the forming drum, and the region crimped to the outer periphery of the forming drum gradually. Expand backwards. In this way, when the tip of the narrow strip member is crimped to the forming drum by a length substantially equal to the circumferential distance of the arcuate surface, the setting member is separated from the narrow strip member, and the tip end of the narrow strip member. Is set on the forming drum. In this way, the tip of the narrow strip member is surely crimped to the forming drum in a wide area that is approximately equal to the circumferential distance of the arcuate surface of the set member, so the crimping force of the narrow strip member to the forming drum becomes strong. However, the tip portion does not shift on the molding drum or peel off from the molding drum.

According to the second aspect of the present invention, when the set member sucks and holds the tip of the narrow strip-shaped member, some external force acts on the narrow strip-shaped member. The holding position does not change due to the narrow strip member shifting.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 1, 2, 3, and 4, reference numeral 11 denotes a molding drum whose diameter can be expanded / contracted, and this molding drum 11 can rotate around a horizontal axis. And this molding drum 11
For example, a cylindrical belt band B is attached to the outer periphery of the.

Reference numeral 15 denotes a frame installed behind the molding drum 11, and a base end portion of a swing arm 17 is rotatably connected to a front upper portion of the frame 15 via a pin 16. A set member 20 is rotatably supported at the tip end of the swing arm 17 via bearings 18 and 19.
Has a shaft portion 21 parallel to the axis of the forming drum 11. Also,
The setting member 20 has an arm portion 22 that extends radially outward from a central portion of the shaft portion 21 in the axial direction.
An arcuate portion 23 extending in the axial direction is continuous with the radially outer end portion of 22. The arcuate portion 23 also extends in the circumferential direction, and has a arcuate cross-sectional shape when cut along a plane perpendicular to the rotation axis of the setting member 20. The arcuate portion 23 has a relatively thick wall at the front end in the rotational direction, and has a substantially streamlined shape that gradually becomes thinner toward the rear in the rotational direction, and the center of curvature of its inner peripheral surface is the setting member. It is located on the 20 axis of rotation. Further, the outer end of the set member 20 in the radial direction, that is, the arcuate portion 23.
The outer peripheral surface (arc-shaped surface 26) has a substantially arcuate shape with the vicinity of the rotation axis of the setting member 20 as the center of curvature, and a plurality of suction ports 24 are formed at the front end in the rotation direction. Reference numeral 25 is a vacuum passage formed in the setting member 20.
One end of 25 is branched and connected to each of the suction ports 24,
The other end is connected to a vacuum source via a rotary valve (not shown). Then, when a narrow strip member S, for example, a strip in which the periphery of a plurality of parallel cords is coated with rubber is supplied to the arcuate surface 26 on which the suction port 24 is formed, the suction port 24 becomes a narrow strip member. Suction and hold S. Further, a flat blade receiving surface 27 for cutting the narrow band member S in cooperation with a cutter described later is formed at the front end of the arcuate portion 23 in the rotation direction.

Reference numeral 30 is a cylinder, which is connected to the frame 15 on the head side via a bracket 31, as a contacting / separating means. The tip of a piston rod 32 of the cylinder 30 is rotatable to the base end of the swing arm 17. Are linked to. As a result, when the cylinder 30 operates, the swing arm 17 swings and the set member 20 approaches or separates from the outer periphery of the forming drum 11. Reference numeral 35 is a motor as a drive means fixed to the swing arm 17, and a pulley 37 is connected to the motor 35 via a clutch 36. A belt 39 is provided between the pulley 37 and the pulley 38 fixed to the shaft portion 21 of the setting member 20.
As a result, when the motor 35 operates while the clutch 36 is connected, the rotational force of the motor 35 is transmitted to the setting member 20 via the clutch 36, the pulley 37, the belt 39, and the pulley 38. , The set member 20 is driven and rotated about the rotation axis. On the other hand, when the clutch 36 is disengaged, the setting member 20 is disengaged from the motor 35 and can freely rotate about the rotation axis. 40 is an encoder fixed to the swing arm 17,
A belt 43 is stretched between a pulley 41 attached to the encoder 40 and a pulley 42 fixed to the pulley 37. The encoder 40 constantly detects the rotational position of the setting member 20 and controls the motor 35.

Reference numeral 45 denotes a shaft portion 21 of the setting member 20 via a bearing 46.
Is a cylindrical pressure-bonding roll supported so as to be freely rotatable on the outside, and the pressure-bonding roll 45 has its rotation axis coaxial with the rotation axis of the set member 20 and is arranged radially inside the arc-shaped portion 23. . Reference numeral 47 denotes a plurality of pairs of guide rollers rotatably supported by a bracket 48 fixed to the swing arm 17, and these guide rollers 47 are narrow strip members S.
By rotating while sandwiching from above and below, the forming drum 11
The narrow strip-shaped member S supplied toward the side is guided.

Reference numeral 49 is a cylinder fixed to the bracket 48 just below the guide roller 47.
49 extends substantially in the direction of the normal to the pressure roll 45.
A clamp member 51 is attached to the tip of the piston rod 50 of the cylinder 49, and the clamp member 51 can be moved toward and away from the arc surface 26 by the operation of the cylinder 49. When the arcuate portion 23 moves to a position facing the clamp member 51, the clamp member 51 operates as the cylinder 49 operates so that the piston rod 50 projects.
Guide roller rotatably supported by the clamp member 51
The narrow strip-shaped member S is pressed against the arc-shaped surface 26 of the setting member 20 together with 52, and the narrow strip-shaped member S sucked and held by the setting member 20 is clamped in cooperation with the setting member 20. Reference numeral 55 is a cylinder attached to the central portion in the longitudinal direction of the swing arm 17 via a bracket 54, and the tip of a piston rod 56 of this cylinder 55 is slidably attached to the clamp member 51 via a connecting body 57. A matching cutter 58 is installed. When the cylinder 55 is actuated and the piston rod 56 is projected, the cutter 58 cuts the narrow strip member S sandwiched by the set member 20 and the clamp member 51 in cooperation with the blade receiving surface 27. To do.

Next, the operation of the embodiment of the present invention will be described. Now, as shown in FIG. 5, the forming drum 11 having the belt band B attached to its outer periphery rotates in the direction of the arrow, and the narrow band-shaped member S is formed on the outer periphery of the forming drum 11, specifically, the outer periphery of the belt band B. Is supplied,
It is assumed that the narrow band member S is spirally wound around the outer periphery of the forming drum 11. At this time, since the crimping roll 45 is in contact with the upper surface of the narrow strip-shaped member S at a position separated from the forming drum 11, the pressing speed is received from the narrow strip-shaped member S and the traveling speed of the narrow strip-shaped member S is received. They are rotating at the same peripheral speed. In this way, when the narrow strip member S is spirally wound around the outer periphery of the forming drum 11 a predetermined number of times, the winding work ends, but the piston rod 32 of the cylinder 30 projects and sways just before the end of the winding work. The moving arm 17 is swung downward to bring the pressure roll 45 close to the forming drum 11. The approach of the pressure-bonding roll 45 to the forming drum 11 is stopped when the pressure-bonding roll 45 contacts the forming drum 11 via the narrow band member S and the belt band B. As shown in FIG. 6, the narrow band member S is pressed against the belt band B and the forming drum 11 with a predetermined pressure by the driving force of the cylinder 30.

When the cutting position of the narrow band member S reaches the extension line of the blade receiving surface 27, the rotation of the forming drum 11 is stopped. At this time, by receiving the driving force from the forming drum 11, the pressure-bonding roll 45, which has been following and rotating, also stops its rotation. Next, the motor 35 is operated.
Rotational force of the clutch 36, pulley 37, belt 3 in the connected state
9. Transmitted to the setting member 20 via the pulley 38, the setting member 20 is rotated about the rotation axis in the direction indicated by the arrow in FIG. The rotation amount of the setting member 20 at this time is detected by the encoder 40. Then, when the setting member 20 rotates to a position where the front end of the arcuate portion 23 in the rotation direction faces the clamp member 51, a stop signal is sent from the encoder 40 to the motor 35, and the operation of the motor 35 stops. At this time, since the bearing 46 is interposed between the setting member 20 and the pressure roll 45, the pressure roll 45 does not rotate. At this time, the front end of the arcuate portion 23 in the rotation direction is a pressure roll.
Since it penetrates between 45 and the narrow strip S, the front end of the arcuate surface 26 in which the suction port 24 is formed in the rotational direction makes surface contact with the surface of the narrow strip S. Next, the cylinder 49 is actuated, the piston rod 50 thereof is projected, and the clamp member 51 approaches the arc-shaped portion 23 of the setting member 20. As a result, the narrow strip-shaped member S is pressed and clamped by the clamp member 51 and the guide roller 52 against the arc-shaped surface 26 of the arc-shaped portion 23. At the same time, the vacuum passage 25 is connected to a vacuum source, and the narrow strip member S that is in contact with the arcuate surface 26 is suction-held by the suction port 24.

Next, the cylinder 55 is operated to cause the piston rod 56 to project, and the cutter 58 is moved toward the blade receiving surface 27 of the arcuate portion 23. As a result, the narrow strip member S is shown in FIG.
As shown in, the cutter 58 and the blade receiving surface 27 cut at the cutting position. As a result, the narrow strip-shaped member S on the molding drum 11 side from the cutting position becomes the rear end portion of the narrow strip-shaped member S wound around the molding drum 11, while
The strip-shaped member S sandwiched by the set member 20 and the clamp member 51 is the tip of the narrow strip-shaped member S located behind the cutting position. Then, the piston rod 56 of the cylinder 55 retracts, and the cutter 58 returns to the initial position. Next, the forming drum 11 is rotated in the direction indicated by the arrow in FIG. As a result, the rear end portion of the narrow band member S is attached to the belt band B while being pressed against the forming drum 11 by the pressure-bonding roll 45 that rotates following the forming drum 11. At this time,
The set member 20 and the clamp member 51 maintain the above-mentioned state.

In this way, when the narrow strip-shaped member S is attached to the periphery of the forming drum 11 by a predetermined length, the forming drum is
11 rotations stop. Next, the piston rod 32 of the cylinder 30 retracts, and the swing arm 17 swings largely upward from the position shown by the solid line in FIG. 1 to the position shown by the phantom line. As a result, the tip end portion of the narrow band member S sandwiched between the arcuate portion 23 of the setting member 20 and the clamp member 51 moves from the position shown by the phantom line in FIG. 8 to the position shown by the solid line, and the forming drum 11 Stay away from. Next, the belt-shaped tread rubber is supplied to the forming drum 11 and the forming drum 11 is rotated, the tread rubber is attached to the belt band B and the narrow band member S on the outer side in the radial direction, and the belt / tread band is formed. It Next, the forming drum 11 is reduced in diameter and the belt / tread band is taken out from the forming drum 11.

Next, after expanding the diameter of the molding drum 11, the belt ply is supplied to the molding drum 11 while rotating the molding drum 11, and the belt band B is attached to the outer periphery of the molding drum 11. Next, the tip end portion of the narrow strip-shaped member S that is sucked and held by the suction port 24 formed in the arc-shaped surface 26 of the setting member 20 and is sandwiched by the arc-shaped portion 23 of the setting member 20 and the clamp member 51. The molding drum 11, more specifically, is set at a predetermined position on the outer circumference of the belt band B. Such setting work is performed as follows. First, the cylinder
The piston rod 32 of 30 is projected to swing the swing arm 17 downward, and the pressure roll 45 is pressed against the forming drum 11 with a predetermined pressure. At the same time, the piston rod 50 of the cylinder 49 is retracted to separate the clamp member 51 from the arcuate portion 23 of the setting member 20, and the tip end of the narrow strip member S is released from the clamp between the arcuate portion 23 and the clamp member 51. Simultaneously with this release, the motor 35 is actuated to drive and rotate the setting member 20 in the direction shown by the arrow in FIG. 9 to bring the front end of the arcuate portion 23 in the rotational direction into contact with the outer periphery of the forming drum 11 (belt band B). Then, even after this contact, the set member 20 is rotated in the same direction,
The arcuate portion 23 is slightly inserted between the pressure roll 45 and the forming drum 11. As a result, the pressure-bonding roll 45 is pushed back to be slightly separated from the outer periphery of the belt band B, and the narrow band member S sucked and held by the arc-shaped portion 23 of the setting member 20.
9 is pressed against the outer periphery of the forming drum 11 (belt band B) as shown in FIG.

Next, the clutch 36 is disengaged to set the set member.
20 is separated from the motor 35 to allow free rotation, and the forming drum 11 is rotated around the axis as indicated by the arrow in FIG. As a result, the set member 20, which is pressed against the forming drum 11 with a predetermined pressure by the driving force of the cylinder 30, receives the driving force from the forming drum 11 while rollingly contacting the outer periphery of the forming drum 11 (belt band B). Follow and rotate. At this time, the vacuum passage 25 is shut off from the vacuum source, and the tip of the narrow strip member S is sucked into the suction port 24 of the setting member 20.
Release from holding by suction. As a result, the tip end of the narrow band member S is gradually pushed rearward from the tip to the outer periphery of the forming drum 11 (belt band B) by the arcuate surface 26 of the set member 20 pressed against the forming drum 11, The region crimped to the outer periphery of the drum 11 (belt band B) gradually expands rearward. In this way, as shown in FIG. 10, the tip of the narrow strip member S is formed by a length substantially equal to the circumferential distance of the arcuate surface 26.
When pressure-bonded to the (belt band B), the arcuate portion 23 of the setting member 20 is separated from the narrow belt member S. When the set member 20 is separated from the narrow band member S in this manner, the pressure bonding roll
45 is pushed by the cylinder 30 and approaches the forming drum 11, and the narrow band-shaped member S is pressed against the outer periphery of the forming drum 11 (belt band B) following the setting member 20 and pressure-bonded. The leading end of the narrow strip member S is set on the forming drum 11 in this manner. At this time, the leading end of the narrow strip member S is set on the forming member 11.
Since a wide area approximately equal to the circumferential distance of the arcuate surface 26 of 20 is securely crimped to the forming drum 11 (belt band B),
The pressure force of the narrow strip member S to the molding drum 11 becomes strong, and the tip end of the narrow band member S may be displaced on the molding drum 11 or
It does not peel off from 11.

Next, the clutch 36 is connected and the motor 35 is operated to rotate the arc-shaped portion 23 back to the initial position. At this time, the narrow strip-shaped member S is pressed against the outer periphery of the forming drum 11 (belt band B) by the pressing roll 45 that follows the forming drum 11 and is pressed one after another. When the operation is performed for about one round, the piston rod 32 of the cylinder 30 is retracted to swing the swing arm 17 upward, and the pressure roll 45 is returned to the initial position shown in FIG.

Although the narrow strip member S is cut by the guillotine type cutter 58 in the above-mentioned embodiment, in the present invention, it may be cut by the scissors type cutter such as an air nipper. Good.

[0021]

As described above, according to the present invention, the tip end portion of the narrow band member can be securely pressure-bonded to the outer periphery of the forming drum over a wide range.

[Brief description of drawings]

FIG. 1 is a schematic front view showing an embodiment of the present invention.

FIG. 2 is a schematic plan view thereof.

3 is a cross-sectional view taken along the line II of FIG.

FIG. 4 is a sectional view taken along the line II-II of FIG.

FIG. 5 is an explanatory view explaining an operation of one embodiment of the present invention.

FIG. 6 is an explanatory view illustrating the operation of the embodiment of the present invention.

FIG. 7 is an explanatory view illustrating the operation of the embodiment of the present invention.

FIG. 8 is an explanatory view explaining an operation of one embodiment of the present invention.

FIG. 9 is an explanatory view explaining an operation of one embodiment of the present invention.

FIG. 10 is an explanatory view explaining the operation of the embodiment of the present invention.

[Explanation of symbols]

 11 ... Molding drum 20 ... Set member 24 ... Suction port 26 ... Arc surface 30 ... Contacting / separating means 35 ... Driving means 51 ... Clamping member S ... Narrow strip-shaped member

Claims (2)

[Claims] 1. A front end portion setting device of a narrow strip member for crimping and setting the front end portion of the narrow strip member on the outer periphery of a molding drum, wherein a plurality of suction belts hold the narrow strip member at the outer end in the radial direction. A setting member which has an arcuate surface on which the suction port is formed and which is free to rotate about a rotation axis which is parallel to the axis of the molding drum and is located near the center of curvature of the arcuate surface; And a drive means that is connectable to the set member and that is connectable to the set member and that drives the set member to rotate about the rotation axis when connected to the set member. The holding set member is brought closer to the forming drum by the contacting / separating means and driven and rotated by the driving means to press the tip of the narrow strip-shaped member against the outer periphery of the forming drum, and then set. The material is separated from the drive means so that it can rotate freely, the molding drum is rotated around the axis, and the narrow band-shaped member is released from the suction holding of the setting member, thereby molding the tip of the narrow band-shaped member. A tip end setting device for a narrow band-shaped member, characterized in that it is pressed against the outer periphery of the forming drum by the arcuate surface of the set member that rotates following the drum, and is gradually pressed from the tip. 2. A tip end of a narrow strip-shaped member that is suction-held by the setting member is set by further providing a clamping member that can approach and separate from the arcuate surface of the setting member, and pressing the clamping member against the setting member. The distal end portion setting device for the narrow strip-shaped member according to claim 1, wherein the device is clamped in cooperation with the member.