JPH0645191B2 - Belt-shaped member pasting device for tire molding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention wraps a belt-shaped member such as an inner liner or ply cord around a molding drum of an automobile tire, and joins both ends thereof to form an endless shape. The present invention relates to a sticking device for.

(Prior Art) As a belt-shaped member sticking device used in a primary molding machine for automobile tires, a device described in JP-A-59-207227 is known. In this device, an anvil for cutting a belt-shaped member, a conveyer for conveyance and a brake roller are sequentially arranged on one side of a top portion of a tire forming drum, and the tip of the belt-shaped member placed on the anvil at the tip of the conveyor is placed above. The vacuum cap is suction-held and lifted, and the vacuum cap is moved forward to convey and crimp the tip of the belt-shaped member to the tire-molding drum. Then, after the suction is released, the tire-molding drum is rotated about one revolution. The above belt-shaped member is wound around a tire-forming drum, and in this state, the vicinity of the rear end of the belt-shaped member on the anvil of a predetermined length is cut to a predetermined length while being held by the vacuum cap. While lifting the rear end of the strip with the vacuum cap, remove the strip on the anvil and conveyor from the anvil and conveyor. Is retracted is retracted from the lower vacuum cap, so that by lowering the aforementioned vacuum cap later accordingly joining the rear end portion of the belt-shaped member to the distal end portion of the belt-shaped member on the drum for tire building.

(Problems to be Solved by the Invention) However, in the above-mentioned device, when the belt-shaped member is wound around the drum by rotating the molding drum having the tip of the belt-shaped member fixed, the belt-shaped member is formed by the brake roller at the rear end of the conveyor. Since the tension is applied to the strip-shaped member, the thin and narrow portions of the strip-shaped member are stretched to amplify the unevenness of the thickness and width, and when cutting the strip-shaped member on the anvil, the rear side of the cutting line, that is, the conveyor side is Although it is fixed by the pressing member, the front side, that is, the drum side, is not fixed and is open,
The cutting trace bends without forming a straight line in the width direction.Therefore, when joining the front end and the rear end of the belt-shaped member wound around the drum, a gap or extra overlap is formed at the joint and correction is necessary. It was difficult to automate the joining work.

The present invention provides a band-shaped member sticking device which can wind a band-shaped member without tension, and fix the front and rear sides of a cutting line to cut the band-shaped member in a straight line.

(Means for Solving the Problems) A belt-shaped member sticking device in a tire molding machine of the present invention is such that a swing frame long in a direction orthogonal to the drum is provided as a fulcrum on a side far from the drum below the front side of the tire molding drum. The swing frame is provided so that it can swing up and down, and a slide frame that moves forward and backward in the length direction is provided on this swing frame. Side to drum side, a traveling cutter for cutting the belt-shaped member is provided between the fixed cutting table and the movable cutting table, and the upper surfaces of the facing portions of the fixed cutting table and the movable cutting table are arranged between the fixed cutting table and the movable cutting table. A suction port for fixing the belt-shaped member is opened on the upper side of the column, and a clamp for fixing the conveying surface of the conveying belt to the upper end of the pillar standing on the slide frame. It is characterized by having a lamp.

(Operation) When the swing frame is located at the lower side and the slide frame is at the standby position below the front side of the forming drum, the strip-shaped member is placed on the fixed cutting table and the conveyor belt, and its tip is in front of the fixed cutting table. Place it so that it fits the edge, apply suction to the suction port that opens on the upper surface of the fixed cutting table to fix the tip of the belt-shaped member on the fixed cutting table, and then move the slide frame forward and swing the swing frame upward. The tip end of the belt-shaped member is abutted against the lower end of the drum while being swung, and attached. Then, while fixing the conveying surface of the conveying belt with a clamp, the suction of the fixed cutting table is stopped, and in that state, the slide frame is advanced by a predetermined distance,
The conveyor belt is moved forward while the belt-shaped member is stationary. Then, after opening the clamp, the tire forming drum and the conveyor belt are synchronously rotated to wind the belt-shaped member on the conveyor belt around the tire forming drum without tension, and the winding length is the forming drum. When the tire reaches a predetermined length shorter than the circumference, preferably a length close to the circumference, the tire forming drum and the conveyor belt are stopped. Then, the clamp is closed again to fix the transfer surface of the transfer belt, and the slide frame is retracted in this state, so that the transfer belt, the fixed cutting base, and the movable cutting base are moved by a predetermined distance while keeping the belt-shaped member stationary. By retreating, the distance from the traveling cutter between the fixed cutting table and the movable cutting table to the winding start point at the lower end of the tire forming drum is the circumference of the tire forming drum and the already wound length of the belt-shaped member. Is equal to the length of the unwound portion. Next, suction is applied to the suction ports opened on the upper surfaces of the fixed cutting table and the movable cutting table to fix the strip-shaped member to the fixed cutting table and the movable cutting table, and then the traveling cutter is driven to cut the strip-shaped member. Thereafter, while separating the movable cutting table from the fixed cutting table and advancing the same, the tire forming drum is rotated in synchronization with the advance of the movable cutting table, whereby the remaining winding of the belt-shaped member is performed without tension. Then, after this winding is completed, the intake of the movable cutting table is stopped, the rotation of the molding drum and the advance of the movable cutting table are stopped, respectively, and then the swing frame is lowered and the slide frame is retracted. Move the movable cutting table back to the initial standby position.

(Embodiment) In FIG. 1, reference numeral 1 is a tire forming drum, and a belt-shaped member B (see FIGS. 3 to 10) supplied to the lower surface of the drum 1 by rotating it counterclockwise is the drum 1. Wrapped around the surface of. A photoelectric element L for detecting the tip of the belt-shaped member B wound on the drum 1 is provided in front of the tire forming drum 1 (on the left side in FIG. 1), and the drum is provided on the floor below the photoelectric element L. A long base 2 is installed in a direction perpendicular to the axis of 1. A swing frame 4 having a fulcrum 3 on the rear end side far from the drum 1 is provided on the base 2 so as to be vertically swingable, and a front end portion on the drum 1 side is swingable on a front surface of the base 2. The swing frame 4 is connected to the tip of the piston rod 6 of the mounted lifting air cylinder 5, and the swing frame 4 swings up and down as the piston rod 6 moves back and forth. A screw jack may be used instead of the lifting air cylinder 5.

Rails 7 in the front-rear direction are laid on the left and right of the upper surface of the swing frame 4 (on the front side and the back side of the paper), and an upper slide frame 8 is swingably mounted on the rail 7 via a swing block 9 on the lower surface. To be In addition, front and rear guide sprockets 10, 10 provided on the swing frame 4
A transmission chain 11 is wound around the end of the transmission chain 11 and is connected to the protrusion 12 on the lower surface of the slide frame 8. The transmission chain 11 is rotated in the forward and reverse directions by the transmission from the sliding motor 13 installed at the rear end of the swing frame 4.

Belt pulleys 16 and 16 are rotatably supported by brackets 15 and 15 located at the rear and central portions of the slide frame 8, and belts 17 for conveying belt-shaped members are wound around the front and rear pulleys 16 and 16. , Driven by a transport motor (not shown). Above pulley 1
As shown in FIG. 2, an auxiliary pulley 18 having a narrow width is fixed to one end of each of the shafts 6 and 16, and the auxiliary pulleys 18 and 18 before and after the auxiliary pulley 18 are fixed.
Auxiliary belt 19 is wound around and rotates integrally with conveyor belt 17. A clamp 21 composed of a driving air cylinder and a pair of upper and lower jaws is fixed to the upper end of a column 20 standing upright on the swing frame 4, and the upper and lower jaws are closed by the operation of the air cylinder to close the auxiliary belt. The upper surface of 19 is sandwiched so as to prevent the transport belt 17 from horizontally moving.

A fixed cutting table 22 is fixed to the front portion of the slide frame 8 in the vicinity of the front pulley 16 of the conveyor belt 17. The upper surface of the fixed cutting table 22 is a conveyor belt 17
The suction port 23 is formed on a smooth surface having substantially the same height as the above, and a large number of suction ports 23 are opened on the upper surface, and a negative pressure source is connected to the suction port 23 via an electromagnetic opening / closing valve (not shown). A pair of left and right slide rails 24 are laid in front of the fixed cutting table 22 (see FIG. 2), and a movable cutting table 25 is slidably mounted on the slide rails 24, 24 via a slide block on the lower surface. The nut that protrudes from the bottom center of the movable cutting table 25
A negative shaft 28 in the front-rear direction supported by a bracket 27 on the slide frame 8 is fitted to the slide frame 26, and the negative shaft 28 is driven by a servo motor 29 (see FIG. 1) on the lower surface of the slide frame 8 to rotate normally.・ Reverses, which causes the movable cutting table 25 to move back and forth. The upper surface of the movable cutting table 25 is formed as a smooth surface having the same height as the fixed cutting table 22, and a large number of suction ports 30 are opened at the rear end thereof.
A negative pressure source is connected to the suction port 30 via an electromagnetic opening / closing valve. A traveling cutter 31 is provided between the fixed cutting table 22 and the movable cutting table 25, and the cutting edge of the traveling cutter 31 is provided on both cutting tables 2
It projects upward from the gap between 2 and 25.

In the above structure, as shown in FIG. 1, the piston rod 6 of the lifting air cylinder 5 is retracted to position the swing frame 4 downward, and the slide frame 8 is in the retracted position away from the molding drum 1. At this time, as shown in FIG. 3, the strip-shaped member B is placed on the fixed cutting table 22 and the conveyor belt 17 so that the tip of the belt-shaped member B is aligned with the front edge of the fixed cutting table 22, and the upper surface of the fixed cutting table 22 is fixed. Suction port that opens to
The suction is applied to 23 to fix the tip of the belt-shaped member B on the fixed cutting table 22.

Next, the sliding motor 13 is driven, the slide frame 8 is moved forward (see FIG. 4), and the swing frame 4 is further swung upward so that the tip of the belt-shaped member B is pressed against the lower end of the drum 1 to be attached. (See FIG. 5). continue,
The upper portion of the auxiliary belt 19 is clamped by the clamp 21 instead of the conveying surface of the conveying belt 17 to prohibit horizontal movement of the conveying surface of the conveying belt 17, and the suction action of the suction port 23 of the fixed cutting table 22 is performed. By moving the slide frame 8 forward by a predetermined distance in a state where the belt B is stopped, the supporting pulley 16, the fixed cutting table 22 and the movable cutting table 25 of the conveyor belt 17 are moved forward while the belt-shaped member B is stationary ( (See FIG. 6).

Next, the clamp 21 is opened to release the conveyor belt B, and then the tire forming drum 1 and the conveyor belt 17 are rotated at the same peripheral speed, whereby the belt-shaped member B on the conveyor belt 17 is moved to the tire. When the drum 1 is wound around the molding drum 1 without tension (see FIG. 7) and the drum 1 is rotated about 3/4 according to the setting, the tip of the belt-shaped member B on the drum 1 is detected by the photoelectric element L. Based on the signal, the drum 1 and the conveyor belt 17 are stopped, then the clamp 21 is closed again to fix the conveyor surface of the conveyor belt 17, and the slide frame 8 is retracted in this state,
The belt 17, the fixed cutting table 22, and the movable cutting table 25 are retracted by a predetermined distance while the belt-shaped member B is kept stationary (see FIG. 9). At this time, the distance from the traveling cutter 31 between the fixed cutting table 22 and the movable cutting table 25 to the winding start point of the lower end of the tire molding drum 1 is about 1/4 of the tire circumference, that is, the lower end of the drum 1. To the belt-shaped member B on the drum 1
Is equal to the distance to the tip of. Next, suction ports 23, 3 opened on the upper surfaces of the fixed cutting table 22 and the movable cutting table 25.
The band-shaped member B is fixed to the fixed cutting table 22 and the movable cutting table 25 by applying suction to 0, and the traveling cutter 31 is driven to cut the band-shaped member B. Then, while separating the movable cutting table 25 from the fixed cutting table 22 and advancing it, the movable cutting table 25 is moved.
The tire forming drum 1 is rotated at a speed equal to the advancing speed of (1), whereby the remaining winding of the belt-shaped member B is performed without tension (see FIG. 10). Then, after this winding is completed, the suction of the movable cutting table 25 is stopped, and the forming drum 1
And the movable cutting table 25 are stopped from moving forward, and then the swing frame 4 is lowered to move the slide frame 8
And the movable cutting table 25 are further retracted to the initial standby position.

(Effects of the Invention) The present invention provides a swing frame below the front side of a tire forming drum, and a slide frame on the swing frame. The slide frame is provided with a belt for conveying belt-shaped members, a fixed cutting table, and a movable cutting table. And a traveling cutter for cutting the belt-shaped member between the fixed cutting table and the movable cutting table, and a suction port for fixing the belt-shaped member on the upper surface of the fixed cutting table and the movable cutting table facing each other. And a clamp for fixing the conveying surface of the conveying belt is provided.Therefore, in the state where the tip of the belt-shaped member placed on the fixed cutting table is pressed against the lower end of the drum, By synchronously operating the conveyor belt,
A belt-shaped member with a predetermined length less than one circumference can be wound around the drum surface without tension, and the remaining belt-shaped members can be wound without tension by cutting the belt-shaped member and then rotating the movable cutting table and the drum synchronously. You can And
Since the belt-shaped member can be adsorbed and fixed to the fixed cutting table and the movable cutting table by a suction action, when the belt-shaped member is cut and the belt-shaped member is moved together with the fixed cutting table or the movable cutting table, the above-mentioned adsorption is performed. By fixing, the belt-shaped member can be cut straight and its extension can be prevented.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of an embodiment of the present invention, FIG. 2 is a plan view of a front portion of FIG. 1, and FIGS. 3 to 10 are side views of a drum lower portion for explaining the operation. . B: Belt-shaped member, 1: Tire forming drum, 4: Swing frame, 8: Slide frame, 17: Belt-shaped member conveying belt, 20: Strut, 21: Clamp, 22: Fixed cutting table,
23, 30: suction port, 25: movable cutting table, 31: traveling cutter.

Claims (1)

[Claims] 1. A swing frame which is long in the direction orthogonal to the drum is provided below the front of the tire forming drum so as to be vertically swingable about a side distant from the drum as a fulcrum, and the swing frame advances and retracts in the length direction. A slide frame is provided, and a belt for carrying a belt-shaped member is provided on the slide frame,
A fixed cutting table and a movable cutting table that can move forward and backward are arranged in order from the fulcrum side of the swing frame toward the drum side, and traveling for cutting the belt-shaped member between the fixed cutting table and the movable cutting table. A cutter is provided, a suction port for fixing the belt-shaped member is opened on the upper surface of the facing portion of the fixed cutting table and the movable cutting table, and a clamp for fixing the transfer surface of the transfer belt to the pillar standing on the slide frame. A belt-shaped member sticking device for a tire molding machine, characterized by being provided with.