JP2004255770A - Sticking method of reinforcement in tire forming servicer, sticking equipment thereof and structure of tire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sticking method of a reinforcement in a tire forming servicer, sticking equipment thereof and a structure of a tire which prolong the lifetime of a cutting device and improve the uniformity of the tire by dispersion of a sticking part. <P>SOLUTION: The strip-shaped material cutting device 5 which cuts a strip-shaped material in a prescribed length corresponding to about the peripheral length of a forming drum 2 is installed between a longitudinally carrying conveyor 4a and a carrying conveyor 4b. A supply means 6 for supplying a reinforcing strip-shaped material Wx onto both-side edge parts in the lengthwise direction of the strip-shaped material W, the sticking device 7 which sticks the reinforcing strip-shaped material Wx on the two-side edge parts in the lengthwise direction of the strip-shaped material W, a means 8a for detecting the tip of the material W and a slide amount detecting means 8b for detecting the amount h of a slide of a tip sticking position, and a reinforcing strip-shaped material cutting device 9 which cuts the reinforcing material Wx at the rear end position in a prescribed length substantially equal to the length of the material W on the basis of a value detected by the above means, are installed on the longitudinally carrying conveyor 4a. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of attaching a reinforcing material in a tire molding servicer, a device for applying the reinforcing material, and a structure of a tire, and more particularly, to extending the life of a strip material and a cutting device of the reinforcing strip material, and exposing a reinforcing cord of the strip material. The present invention relates to a method of attaching a reinforcing material in a tire forming servicer having improved prevention and tire uniformity, an attaching device thereof, and a structure of a tire.
[0002]
[Prior art]
Conventionally, in the case of laminating a plurality of strip-shaped materials in a tire forming process and feeding and winding them on a forming drum, the tip positions of the first strip-shaped material and the second strip-shaped material are shifted on a conveyor of a tire forming servicer and stacked. A way to make it happen. This is performed for the purpose of adjusting the rigidity balance and the weight balance by shifting the lap splice (lamination) position on the forming drum to improve the tire uniformity (for example, see Patent Document 1). .
[0003]
[Patent Document 1]
JP-A-8-174712 (pages 3 to 4, FIG. 1)
[0004]
[Problems to be solved by the invention]
By the way, when manufacturing a tire having a two-ply carcass structure in which a first-layer carcass member is wound around a tire bead portion and a second-layer carcass member is wound on the outside thereof, the carcass material is formed on a transport conveyor of a tire forming servicer. A narrow reinforcing band-like material (generally called a chafer or finisher) is attached to both ends in the longitudinal direction, and the band-like material to which the reinforcing band-like material is attached is applied to approximately the circumference of the forming drum (perimeter of forming drum + adhering allowance). ) Is cut by a cutter of a cutting device at a length corresponding to the length of (1), then supplied onto a forming drum, wound in a tubular shape, and a terminal portion is stuck.
[0005]
However, in a method in which a carcass having a generally weave structure and a band-shaped reinforcing material having a generally plain weave structure are cut on a transport conveyor and cut into fixed lengths by a cutting device, the lamination thickness is large, and the rigidity is high. In addition to the difficulty, the life of the cutter is short, and the sharpness of the cutter deteriorates in a short time.
[0006]
Furthermore, when the carcass and the band-shaped reinforcing material are bonded together and wound around a forming drum and the terminal portion is bonded, the thickness of the thick portion increases the step of the bonded portion, and the rigidity balance and weight balance can be adjusted. There were problems such as becoming difficult and worsening the tire uniformity.
[0007]
This invention pays attention to such a conventional problem, and can extend the life of the cutter of the cutting device, prevent the reinforcing cord from being exposed from the cutting end portion of the band-shaped material, and further reduce the step of the bonding portion. It is an object of the present invention to provide a method of attaching a reinforcing material in a tire forming servicer capable of improving the uniformity of a tire by dispersing an attaching portion, a device for attaching the reinforcing material, and a structure of the tire. It is.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a method of attaching a reinforcing material in a tire molding servicer according to the present invention, wherein the attaching positions of the pair of left and right reinforcing band materials are shifted rearward from the front end of the band material by a predetermined distance. When supplying and winding the laminated band material on a forming drum, the gist is that the laminating position of the front and rear terminals of the band material and the laminating position of the front and rear terminals of the reinforcing band material are shifted from each other. Things.
[0009]
In another method of attaching a reinforcing material in a tire forming servicer of the present invention, a first layer of band material is wound around a forming drum and turned up, and then a band material is formed on the first layer of band material. A pair of left and right reinforcing band-shaped materials and a second layer of band-shaped material stuck a predetermined distance to the rear side with respect to the front end position are wound around the end portion of the second layer of band-shaped material at the end of winding. The gist of the invention is to attach the reinforcing band-shaped material.
[0010]
Detecting the shift amount of the reinforcing band-shaped material to be attached to the tip of the band-shaped material, cutting the end portion of the reinforcing band-shaped material corresponding to the cut length of the band-shaped material, and reinforcing on the forming drum. The attachment positions of the end portions of the strip material are applied at positions covering the attachment positions of the end portions of the strip material.
[0011]
As described above, since the strip material and the reinforcing strip material are separately cut at shifted positions, an excessive load is not applied to the cutter of the cutting device, the life of the cutter can be extended, and the reinforcing strip material can be cut. Since the bonding position of the terminal portions is applied at a position covering the bonding position of the terminal portion of the band-shaped material, it is possible to prevent the reinforcing cord from being exposed from the cutting terminal portion of the carcass, and further reduce the step of the bonding portion. At the same time, the uniformity of the tire can be improved by dispersing the bonded portions.
[0012]
Further, the reinforcing material sticking device in the tire forming servicer of the present invention is characterized in that the band-shaped material is fixed to a length corresponding to a substantially circumferential length of the forming drum on the front and rear conveyors for conveying and supplying the band-shaped material to the forming drum. A strip material cutting device for cutting, supply means for supplying a pair of left and right narrow reinforcing strip materials on both side edges in the longitudinal direction of the strip material, and both side edges of the reinforcing strip material in the longitudinal direction of the strip material; A laminating device for pasting on the top, a shift amount detecting means for detecting a shift amount of a tip of the reinforcing strip material with respect to a tip of the strip material, and a reinforcing strip material based on a detection value of the shift amount detecting means. And a reinforcing strip-shaped material cutting device for cutting the rear end position to a fixed length substantially equal to the length of the strip-shaped material.
[0013]
The fore-and-aft conveyor is a fore-and-aft conveyor for the second layer of band-shaped material supplied onto the forming drum.
[0014]
As described above, since the cutting position of the reinforcing strip material is cut by detecting the shift amount from the leading end position of the strip material by the shift amount detecting means, it is possible to always perform accurate fixed-size cutting, and the end portions of the reinforcing strip material are always connected. Is attached at a position covering the attaching position of the end portion of the band-shaped material to prevent the reinforcing cord from being exposed from the cut end portion of the band-shaped material.
[0015]
Further, in the tire structure of the present invention, the first layer of the carcass member is wound around the tire bead portion, and the second layer of the carcass member is wound around the outside of the tire bead portion. The main feature is that a reinforcing band-shaped material is attached so as to cover the sheet.
[0016]
In this way, the bonding position of the terminal portions of the reinforcing band-shaped material is applied at a position covering the bonding position of the terminal portion of the band-shaped material, so that it is possible to prevent the reinforcing cord from being exposed from the cutting terminal portion of the band-shaped material, Further, the uniformity of the tire can be improved by reducing the step of the bonding portion and dispersing the bonding portion.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0018]
FIG. 1 is a schematic front view of a tire forming servicer for carrying out the method of attaching a reinforcing material according to the present invention, FIG. 2 is a plan view of FIG. 1, and the tire forming servicer 1 is provided on a side of a forming drum 2. For example, on the upper side, a first back-and-forth transport conveyor 3 capable of moving forward and backward to supply a band-like material such as an inner liner and a first layer of carcass material, and the second layer of carcass material on the lower side The second front-rear transfer conveyor 4a and the transfer conveyor 4b for transferring the band-shaped material W and a pair of left and right reinforcing band-shaped materials Wx (chair or finisher) to the forming drum 2 are installed horizontally.
[0019]
A strip material cutting device for cutting the strip material W to a length corresponding to a substantially circumferential length of the forming drum 2 (a circumferential length of the forming drum + adhering allowance) between the front and rear transport conveyor 4a and the transport conveyor 4b. A supply means 6 for supplying a pair of left and right narrow reinforcing strips Wx on both longitudinal edges of the strip W on the front-rear conveyor 4a; A laminating device 7 for laminating Wx on both side edges in the longitudinal direction of the band-shaped material W, a detecting means 8a for detecting the front end of the band-shaped material W, and a front end lamination of the reinforcing band-shaped material Wx to the front end of the band-shaped material W A shift amount detecting means 8b such as a pulse detector for detecting a position shift amount h, and a rear end position of the reinforcing band-shaped material Wx is substantially equal to a length of the band-shaped material W based on detection values of the shift amount detecting means 8a and 8b. Same length (perimeter of forming drum A reinforcing strip material cutting apparatus 9 for fixed-length cut by pasting margin) is installed.
[0020]
The strip-shaped material cutting device 5 installed between the front and rear transport conveyor 4a and the transport conveyor 4b is provided with a cutting cylinder 11 to which a cutter 10 is attached in a vertical direction. The cutter 10 is operated based on a detection signal (for example, a pulse signal) from the detection means 8a for detecting the belt material W, and the cutter 10 is lowered vertically with respect to the horizontal plane of the front and rear transport conveyors 4a and 4b to determine the band-shaped material W. Cut to length cut.
[0021]
The front / rear conveyor 4a is composed of two rows of belt conveyors, and optical detecting means PH1, PH2 including a light emitter and a light receiver are provided between the belt conveyors. In addition, a pulse counter Pz is connected to the rotation shaft 4x of the front and rear transport conveyor 4a, and counts and detects a feed amount of the band-shaped material W by a pulse.
[0022]
Next, the reinforcing belt-shaped material Wx supply means 6 converts the two reinforcing belt-shaped materials Wx unwound from the reinforcing belt-shaped material Wx supply unit into a plurality of guide rolls 12 and the tip of the reinforcing belt-shaped material Wx. 1 and 3 (a). The guide mechanism 13 includes a guide mechanism 13 that can advance and retreat to both side edges of the W, and a feed mechanism 14 that feeds out the tip of the reinforcing strip material Wx at a predetermined pitch. And (b), a guide plate 13b which advances and retreats via a cylinder 13a and the like, and a delivery mechanism 14 is provided with a ratchet claw 14a and the like which feeds the front end of the reinforcing strip material Wx onto the guide plate 13b. It consists of.
[0023]
On the leading end side of the guide mechanism 13, a reinforcing strip-shaped material cutting for cutting the rear end position of the above-mentioned reinforcing strip-shaped material Wx to a fixed length substantially equal to the length of the strip-shaped material W (peripheral length of the forming drum + adhering allowance). An apparatus 9 and a bonding apparatus 7 are installed, and the reinforcing strip-shaped material cutting apparatus 9 is provided after the reinforcing strip-shaped material Wx based on a detection signal of the shift amount h from the shift amount detecting means 8b by a scissor-like cutter or the like. The end position is cut to a fixed length at substantially the same length as the length of the band-shaped material W.
[0024]
As a method of cutting the fixed-size material at a length substantially equal to the length of the band-shaped material W of the reinforcing band-shaped material Wx (peripheral length of the forming drum + adhering allowance), the pulse number of the pulse counter Pz is set, and the front-rear conveyor 4a is used. The conveyor belt 4b cuts the reinforcing band-shaped material Wx by a predetermined distance at a predetermined distance, and is stopped by the cutter 10 at a stage where the material is stopped.
[0025]
The laminating device 7 is composed of a laminating roll 16 that moves up and down via a cylinder 15, and the two reinforcing band-shaped materials Wx cut by the reinforcing band-shaped material cutting device 9 are applied to the band-shaped material W with respect to the tip. After laminating by a predetermined shift amount h, laminating is performed while being sequentially pressed on the belt-shaped material W.
[0026]
When the two reinforcing strips Wx cut to a fixed size are stuck on both side edges in the longitudinal direction of the strip-shaped material W, as shown in FIGS. 4 (a) and 4 (b), the strip-shaped material W and the reinforcing strip-shaped material are bonded together. It is also possible to bond with a material Wx with a resin liner R such as a polyethylene sheet interposed therebetween.
[0027]
A chain 22 extends around the sprockets 21a and 21b attached to the ends of the shafts 20a and 20b shown in FIGS. 1 and 2, and the shafts 20a and 20b are connected when the width of the band-shaped material W is changed. It is configured to be able to rotate synchronously and change the reinforcing strip material Wx with high precision.
[0028]
Next, a method of attaching the reinforcing material of the present invention using the attaching device in the tire molding servicer as described above will be described.
[0029]
First, a band-shaped material Ws, such as an inner liner or a first-layer carcass material, which has been cut to a fixed size, is supplied from the first front-rear transportation conveyor 3 of the tire forming servicer 1 onto the forming drum 2 and wound into a cylindrical shape. A bead B is driven in from both sides of the drum 2 to wind up (turn up) the turn-up strip material Ws on both side edges.
[0030]
Next, when the belt-like material W such as the second layer of carcass material is transported onto the forming drum 2 by the front and rear transport conveyors 4a and 4b, the transport amount of the ribbon-like material W is detected by the optical detection means PH1 and PH2, and the pulse counter is used. The conveyance of the belt-shaped material W is stopped at the set value preset in Pz.
[0031]
Then, when the band material W such as the second layer of carcass material is supplied and wound on the forming drum 2 by the front-rear conveyor 4a, the band material W supplied on the front-rear conveyor 4a is cut to a fixed size as described above. After that, a pair of left and right reinforcing strips Wx are pasted on both side edges of the strip-shaped material W by a predetermined distance from the tip to the rear side, and the rear end is cut by shifting the tip end by an offset amount. , Corresponding to the length of the strip-shaped material W cut to the fixed size.
[0032]
In addition, the shift amount h of the tip affixing position of the reinforcing strip material Wx is determined by the set value of the pulse set in the pulse counter Pz in advance, and the set value can be arbitrarily changed. The cutting of the terminal section is performed by operating the cutter 10 based on the set value of the number of pulses set in the pulse counter Pz.
[0033]
Then, the second-layer band-shaped material W to which the reinforcing band-shaped material Wx is bonded is supplied onto the forming drum 2 and wound, and as shown in FIG. P1 and the reinforcing strip-shaped material Wx are pasted with the front and rear terminals pasting positions P2 shifted from each other.
[0034]
That is, in the conventional laminating, as shown in FIG. 6A, the strip material W and the reinforcing strip material Wx are cut at the same position where they are laminated, so that the end portion on the forming drum 2 is the same as P3. In the case of laminating at the position, the thickness ta is thicker than the thickness t of the laminating portion of the present invention by the thickness of one reinforcing strip material Wx, and the laminating portion may be dispersed. I can't do it.
[0035]
Therefore, in the embodiment of the present invention, the reinforcing strip material Wx is stuck at a position covering the sticking position of the end portion of the strip material W, thereby preventing the reinforcing cord from being exposed from the cut end portion of the strip material W. Things.
[0036]
As shown in FIGS. 7, 8 and 6B, the pneumatic tire T manufactured using the band-shaped material W and the reinforcing band-shaped material Wx bonded by such a method is attached to the front and rear terminals of the band-shaped material W. The position P1 and the attaching position P2 of the front and rear terminals of the reinforcing band-shaped material Wx are shifted from each other, and furthermore, the terminal winding portion of the first-layer turn-up band-shaped material Ws, and the 2 stuck on the terminal winding portion. Since the bonding is performed so as to cover the end portion of the turn-down band-shaped material WR 1 and the layer with the reinforcing band-shaped material Wx, the step of the bonded portion of the band-shaped material W is reduced, and the bonded portion is dispersed. The uniformity of the tire can be improved, and the reinforcing cord can be effectively prevented from being exposed from the cutting end portion of the belt-shaped material W.
[0037]
【The invention's effect】
The present invention, as described above, the tip of the pair of left and right reinforcing strip material is stuck at a predetermined distance to the rear side from the tip of the strip material, and when the laminated strip material is supplied and wound on a forming drum, Since the pasting position of the front and rear terminals of the band material and the pasting position of the front and rear terminals of the reinforcing band material are shifted, they are cut separately at the position where the band material and the reinforcing band material are displaced. Excessive load is not applied and the life of the cutter can be extended, and the carcass cut because the reinforcing strip-shaped material is attached at the end where the end of the strip is attached It is possible to prevent the reinforcement cord from being exposed from the terminal part, to further reduce the step at the bonding part, and to improve the uniformity of the tire by dispersing the bonding part. There is can be effective.
[0038]
Further, the reinforcing material sticking device in the tire forming servicer of the present invention is characterized in that the band-shaped material is fixed to a length corresponding to a substantially circumferential length of the forming drum on the front and rear conveyors for conveying and supplying the band-shaped material to the forming drum. A strip material cutting device for cutting, supply means for supplying a pair of left and right narrow reinforcing strip materials on both side edges in the longitudinal direction of the strip material, and both side edges of the reinforcing strip material in the longitudinal direction of the strip material; A laminating device for pasting on the top, a shift amount detecting means for detecting a shift amount of a tip of the reinforcing strip material with respect to a tip of the strip material, and a reinforcing strip material based on a detection value of the shift amount detecting means. And a reinforcing strip material cutting device that cuts the rear end position to the same length as the length of the strip material.The cutting position of the reinforcing strip material is detected by shifting the shift amount from the leading end position of the strip material. Detected by means Since cutting is always possible, accurate fixed-size cutting can be performed, and the attachment position of the end portions of the reinforcing strip material is applied at a position covering the attaching position of the end portion of the strip material, and the reinforcing cord is cut from the cutting end portion of the strip material. There is an effect that exposure can be prevented.
[0039]
Further, in the tire structure of the present invention, the first layer of the carcass member is wound around the tire bead portion, and the second layer of the carcass member is wound around the outside of the tire bead portion. The reinforcing strip-shaped material is attached so as to cover the end of the strip-shaped material.Since the reinforcing strip-shaped material is attached at a position covering the end of the strip-shaped material, it is reinforced from the cut end of the strip-shaped material. It is possible to prevent the cord from being exposed, and furthermore, it is possible to improve the uniformity of the tire by reducing the step of the bonding portion and dispersing the bonding portion.
[Brief description of the drawings]
FIG. 1 is a schematic front view of a tire forming servicer for carrying out a method of attaching a reinforcing material according to the present invention.
FIG. 2 is a plan view of FIG.
FIGS. 3 (a) and 3 (b) are explanatory views of a cutting and bonding step of a reinforcing strip material.
FIGS. 4A and 4B are explanatory views of another embodiment of the step of cutting and bonding a reinforcing strip material with a liner such as polyethylene interposed therebetween.
FIG. 5 is an explanatory cross-sectional view showing a state in which a band-shaped material and a reinforcing band-shaped material are wound on a forming drum.
FIGS. 6A and 6B are explanatory views in which a terminal-side bonded portion of the belt-shaped material of the present invention is compared with a conventional bonded portion on a forming drum, and FIG. 6A is a cross-sectional view of a conventional bonded portion having a large step. (B) is a cross-sectional view of a state in which the strip material of the present invention and the reinforcing strip material are dispersed and bonded.
FIG. 7 is a half sectional view of a pneumatic tire manufactured by the bonding method of the present invention.
FIG. 8 is an enlarged sectional view of a bead part of FIG. 7;
[Explanation of symbols]
REFERENCE SIGNS LIST 1 tire forming servicer 2 forming drum 3 first front-rear conveyance conveyor 4 a second front-rear conveyance conveyor 4 b conveyor 5 strip-shaped material cutting device 4 x rotating shaft 6 supply means 7 laminating device 8 a detection means 8 b shift amount detection means 9 reinforcing strip Material cutting device 10 Cutter 11 Cutting cylinder 12 Guide roll 13 Guide mechanism 13a Cylinder 13b Guide plate 14 Delivery mechanism 14a Ratchet claw W Strip material 15 Cylinder 16 Laminating roll 20a, 20b Shafts 21a, 21b Sprocket 22 Chain Wx Reinforcement strip material h Amount Ws Turn-up strip material R Resin liner WR Turn-down strip material B Beads P1, P2, P3 Sticking position t of front and rear ends of strip material, ta Thickness of sticking portion T Pneumatic tire PH1, PH2 Optical Detection means Pz pulse counter

Claims (7)

In the step of transporting the band-shaped material cut to a length corresponding to the substantially circumferential length of the forming drum to the forming drum side, the band-shaped material is cut into substantially the same length as the band-shaped material on both side edges in the longitudinal direction of the band-shaped material. In a method of attaching a reinforcing material in a tire forming servicer in which a pair of left and right reinforcing band-shaped materials having a narrow width is applied and the band-shaped material to which the reinforcing band-shaped material is applied is supplied to a forming drum side and wound into a cylindrical shape,
When the front end of the pair of left and right reinforcing band materials is pasted at a predetermined distance from the front end of the band material to the rear side, when the laminated band material is supplied and wound on a forming drum, the front and rear terminals of the band material are pasted. A method of attaching a reinforcing material in a tire molding servicer, wherein the position is shifted from an attaching position of a front and rear end of a reinforcing strip material. In a method of winding two or more layers of a band-shaped material cut to a fixed length on a forming drum,
After winding the first layer of band material around the forming drum and turning it up, a pair of left and right reinforcing bands are stuck on the first layer of band material with a predetermined distance behind the leading end position of the band material. A method of attaching a reinforcing material in a tire molding servicer in which a material and a second layer of the band-shaped material are wound and the reinforcing band-shaped material is attached so as to cover a terminal portion of the second layer of the band-shaped material at the end of the winding. 3. The tire according to claim 1, wherein an amount of displacement of the reinforcing band-shaped material to be attached to the tip of the band-shaped material is detected, and a terminal portion of the reinforcing band-shaped material is cut in accordance with a length of the band-shaped material cut in a fixed size. 4. A method of attaching a reinforcing material in a molded servicer. The tire forming servicer according to claim 1, 2 or 3, wherein the end portions of the reinforcing band-shaped material to be stuck on the forming drum are stuck at positions where the end portions of the band-shaped material are stuck. How to attach reinforcement. A band-shaped material cutting device that cuts the band-shaped material to a length corresponding to a substantially peripheral length of the forming drum on a front and rear conveyor that conveys and supplies the band-shaped material to the forming drum, and both side edges in the longitudinal direction of the band-shaped material. Supply means for supplying a pair of left and right narrow reinforcing strips on the upper side, a bonding device for sticking the reinforcing strips on both side edges in the longitudinal direction of the strips, and reinforcing the tip of the strips. A shift amount detecting means for detecting a shift amount of the leading end position of the band-shaped material, and a rear-end position of the reinforcing band-shaped material is cut to the same length as the length of the band-shaped material based on a detection value of the shift amount detecting means. And a reinforcing material cutting device for a tire forming servicer. The apparatus for applying a reinforcing material in a tire forming servicer according to claim 5, wherein the front-rear conveying conveyor is a front-rear conveying conveyor for a second layer of band-shaped material supplied onto a forming drum. In a tire structure in which a first-layer carcass member is wound around a tire bead portion and a second-layer carcass member is wound around the outside thereof,
A tire structure in which a reinforcing band-shaped material is attached so as to cover a terminal portion of the second-layer carcass member.

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