JPH1148364A - Method and apparatus for molding bias ply - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mold a bias ply small in size and simple in structure, with high efficiency. SOLUTION: The method for molding a bias ply comprises the steps of quarrying a cut sheet 29 from a strip-like member 24 on a first conveyor 21, then transferring the sheet 29 onto a second conveyor 31, and thereafter connecting the sheet 29 to the bias ply 32 while conveying the ply 32, the sheet 29 via the conveyor 31. At this time, since both the ply 32 and the sheet 20 are placed on the conveyor 31, the above-mentioned connecting work and conveying work can be executed simultaneously.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for forming a bias ply in which a cord extending obliquely is embedded.

[0002]

2. Description of the Related Art As a conventional bias ply forming apparatus, for example, one shown in FIG. 3 is known. The first rear conveyor 11 has a front end 11a obliquely inclined at a predetermined acute angle with respect to the width direction, and forwardly conveys a belt-shaped member 12 in which a number of cords extending in the longitudinal direction are embedded. In front of the first rear conveyor 11
It is located on the extension of the rear conveyor 11 and
A first front conveyor 13 extends in parallel with a front end 11a of the first rear conveyor 11, and conveys the belt-shaped member 12 transferred from the first rear conveyor 11 forward, a first rear conveyor 11 and a first A parallelogram-shaped cutting sheet 14 is disposed between the front conveyor 13 and obliquely cuts the belt-like member 12 along the front end 11a of the first rear conveyor 11 at this position.
A cutting means 15 for cutting out the sheet, and installed alongside the first front conveyor 13, extending along the direction in which the cutting end 14 a of the cutting sheet 14 extends, and joining the cutting sheets 14 to each other so that Conveyor 17 for transporting in a longitudinal direction a pre-formed bias ply 16 in which a cord extending in a direction is embedded.
When a part of the cutting sheet 14 is conveyed by the first front conveyor 13 to a position where the cutting sheet 14 overlaps the end of the bias ply 16, the pressing bar descends and the bias ply
A joining device 18 is provided which presses and joins the cutting sheet 16 and the cutting sheet 14 in the overlapping portion in the vertical direction to integrate the cutting sheet 14 into the bias ply 16. Here, the first rear and front conveyors 11 and 13 and the second conveyor 17 described above are used.
Is composed of a plurality of parallel narrow belts 11b, 13b and 17b, and the cutting means 15 and the second conveyor 17 can change the inclination angle of the belt-shaped member 12 with respect to the width direction. When the cord inclination angle is changed, the front end 11a of the first rear conveyor 11, the rear end 13a of the front conveyor 13, the extending direction of the cutting means 15, and the extending direction of the second conveyor 17 are determined by the cord inclination angle. Can be dealt with by making a change corresponding to

[0003] The bias ply
When molding 16, the first rear and front conveyors 11 and 13
The belt member 12 is conveyed forward by the first rear and front conveyors 11 and 13 in synchronization with each other, and such conveyance is performed when the starting end of the band member 12 is separated from the cutting means 15 by a predetermined distance forward. Stop. Next, the strip member 12 is cut obliquely at a predetermined acute angle with respect to the width direction by the cutting means 15 to cut out a parallelogram-shaped cutting sheet 14. Next, the first
The cutting sheet 14 is conveyed forward by running only the front conveyor 13, and the cutting sheet 14 is conveyed by the bias ply.
Stop when you reach the extension of 16. At this time, the end of the bias ply 16 and the bias ply
The end near 16 overlaps. Next, the bias ply 16 and the cutting sheet 14 are joined at the overlapping portion by the joining device 18, and the cutting sheet 14 is integrated with the bias ply 16. Next, the bias ply 16 is conveyed in a direction away from the first front conveyor 13 by running the second conveyor 17, and the conveyance is performed such that only the terminal end of the bias ply 16 is located on the first front conveyor 13. Stop when it becomes Thereafter, the above operation is repeated, and the long belt-shaped bias ply 16 is formed.

[0004]

However, in such a conventional method and apparatus for forming a bias ply, the above-described transport of the belt-shaped member 12, cutting of the belt-shaped member 12, transport of the cut sheet 14, and the bias ply The joining operation of the cutting sheet 14 and the cutting sheet 14 and the conveying operation of the bias ply 16 must be sequentially performed, that is, any of these operations cannot be performed at the same time, and as a result, the operation efficiency is reduced. There is a problem. Further, in order to cut out a parallelogram-shaped cutting sheet 14 from the band-shaped member 12 and to convey only the cutting sheet 14, two first sheets whose front end 11a and rear end 13a are inclined are provided.
It is necessary to arrange the rear and front conveyors 11 and 13 side by side on the floor surface, and furthermore, because the joining device 18 performs the press joining by the descending operation of the long press bar,
There is a problem that the device is large and the mechanism is easily complicated, and as a result, the entire bias ply forming apparatus becomes large and the structure becomes complicated.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method and an apparatus for forming a bias ply, which can be formed with high efficiency while being compact and simple in structure.

[0006]

SUMMARY OF THE INVENTION The purpose of the invention is as follows.
A step of cutting a belt-like member in which a number of cords extending in the longitudinal direction are embedded inside at an oblique angle at a predetermined acute angle with respect to the width direction to cut a parallelogram-shaped cutting sheet; A step of superposing an end portion of the cut sheet close to the bias ply on an end portion of a preformed bias ply in which a cord conveyed along the extending direction and having a cord extending obliquely therein is embedded; A step of joining the bias ply and the cutting sheet at the overlapping portion while conveying both of the sheets along the extending direction of the cut end to integrate the cutting sheet into the bias ply, and forming the bias sheet. Secondly, a first conveyor for transporting in a longitudinal direction a belt-like member in which a number of cords extending in the longitudinal direction are embedded, and a belt-like member on the first conveyor having a width. Cutting means for cutting the parallelogram cut sheet obliquely cut at a predetermined acute angle to the direction, the first
A bias bias ply, which is installed on the side of the conveyor and extends along the direction in which the cutting end of the cutting sheet extends, and in which a cord extending obliquely inside is embedded by joining the cutting sheets, is longitudinally extended. Conveyor, which extends along the second conveyor above the first and second conveyors, and conveys the cut sheet onto the second conveyor along the direction in which the cutting end extends, and provides a bias ply. Conveying means for superposing an end portion of the cut sheet close to the bias ply on an end portion of the bias ply, and when the bias ply and the cut sheet are being conveyed by the second conveyor, the bias ply and the cut sheet are joined at an overlapping portion. And a joining means for integrating the cutting sheet into the bias ply.

When forming a bias ply in which a cord extending obliquely inside is embedded from a belt-like member in which a large number of cords extending in the longitudinal direction are embedded inside, a first conveyor is driven to drive the first ply. After transporting the belt-shaped member on the conveyor until the start end reaches a position separated by a predetermined distance from the cutting means, the belt-shaped member is cut obliquely at a predetermined acute angle with respect to the width direction by the cutting means, and cut into a parallelogram. Cut out the sheet. Next, the cut sheet is conveyed onto the second conveyor by the conveying means, and the end of the cut sheet, which is close to the bias ply, is overlapped with the end of the formed bias ply. As a result, the bias ply and the cut sheet are placed on the second conveyor. Here, it is sufficient that the first conveyor can convey the belt-shaped member. Therefore, the first conveyor does not need to have a complicated structure in which the front and rear ends are inclined. As a result, the structure of the entire apparatus is reduced. Can be simple. Moreover, the transport means is the first,
Since it extends along the second conveyor above the second conveyor, there is no need for a floor space for installing the transfer means, and as a result, the entire apparatus can be downsized. Next, while the bias ply and the cutting sheet are both conveyed by the second conveyor, the bias ply and the cutting sheet are joined at the overlapping portion, and the cutting sheet is integrated with the bias ply. Since both the bias ply and the cutting sheet are placed on the second conveyor in this way, the work of joining the bias ply and the cutting sheet and the work of transporting the bias ply can be performed at the same time. Work efficiency is improved. In addition, since the above-described joining / transporting work is performed only on the second conveyor,
Simultaneously with this operation, it is also possible to carry out the work of transporting the band-shaped member and the work of cutting the band-shaped member on the first conveyor,
By doing so, the work efficiency can be further improved. In this way, the cutting sheets are successively added to the bias ply to form a long belt-like bias ply.

According to the second and fifth aspects of the present invention, transport and joining can be performed very easily and simultaneously, and the structure can be simplified and the cost can be reduced. Further, according to the structure of the fourth aspect, the cut sheet can be quickly conveyed without being damaged.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1 and 2, reference numeral 21 denotes a first conveyor extending in the front-rear direction. The first conveyor 21 includes a plurality of rollers 22 separated in the front-rear direction and a flat belt 23 stretched between the rollers 22. On this flat belt 23, a band-like member 24 in which a number of cords extending in the longitudinal direction are embedded is placed. The first conveyor 21 travels when one of the rollers 22 is driven and rotated by a motor (not shown).
The belt-shaped member 24 extending parallel to 21 is transported forward (downstream side). Here, the first conveyor 21 is a belt-like member 24.
It is enough to be able to convey in the longitudinal direction,
As in the prior art, it is not necessary to have a complicated structure including a plurality of narrow belts with inclined front and rear ends, and the flat belt 23 may be used as in this embodiment.
The structure of the entire device can be simplified. Numeral 27 denotes cutting means provided just above the center of the first conveyor 21. The cutting means 27 extends along a straight line inclined at a predetermined acute angle A with respect to the width direction of the belt-shaped member 24, and It has a cutter 28 that moves along a straight line. When the cutter 28 moves along the straight line, the first conveyor
The band-shaped member 24 placed on 21 is cut obliquely at a predetermined acute angle A with respect to the width direction, and a parallelogram cut sheet 29 is cut.
Is cut out. When the cord inclination angle in the bias ply 32 described later is changed, the cutting means 27 can change the inclination angle A accordingly.

Reference numeral 31 denotes a second conveyor provided on the side of the first conveyor 21. The second conveyor 31 extends along the direction in which the cutting end 29a of the cutting sheet 29 extends. On the second conveyor 31, a pre-formed bias ply 32 in which a cord inclined obliquely to the width direction is embedded by joining the side end portions of the cutting sheet 29 is placed. The end of the bias ply 32 is always the second
It is separated from the upstream end of the conveyor 31 by the distance between the side ends 29b of the cutting sheet 29 or more. When the second conveyor 31 is driven and driven by a motor (not shown), the bias ply 32 is conveyed in a longitudinal direction, here, a direction away from the first conveyor 21. Here, the second conveyor 31
Is constituted by a plurality of parallel narrow belts 33. Therefore, when the cord inclination angle in the bias ply 32 is changed as described above, the first conveyor 21
Can be changed. Reference numeral 34 denotes a detection sensor such as a photoelectric sensor installed directly above the second conveyor 31, and the detection sensor 34 detects the end of the bias ply 32. The detection sensor 34 is connected to the bias ply 32
After the end of the bias ply is detected, the second conveyor 31 is continuously driven for a predetermined distance to stop the end of the bias ply 32 at a specified position.

Reference numeral 36 denotes a conveying means provided over the first and second conveyors 21 and 31, and the conveying means 36
It has a pair of guides 37 extending along the conveyor 31. These guides 37 support both ends of a moving table 38 extending in the longitudinal direction of the first conveyor 21. The moving table 38 is driven by a servomotor (not shown) to cut the cutting end 29a of the cutting sheet 29. , Ie, along the longitudinal direction of the second conveyor 31. Reference numeral 39 denotes a plurality of vertically movable vacuum cups attached to the lower surface of the moving table 38 so as to be separated from each other, and these vacuum cups 39 are connected to a vacuum source via a switching valve (not shown).
Then, after these vacuum cups 39 descend and come into contact with the cutting sheet 29, the switching valve is opened and vacuum is guided to the vacuum cup 39, and the vacuum cup 39 is placed on the second conveyor 31 side of the cutting sheet 29. Suction the side edge. Also, when the movable table 38 moves toward the bias ply 32 while being guided by the guide 37 when the vacuum cup 39 is sucking the cutting sheet 29, the cutting sheet
29 is transported on the second conveyor 31 along the extending direction of the cut end 29a. The transfer means 36 is also a bias ply.
If there is a change in the inclination angle of the cords in 32, the inclination angle with respect to the first conveyor 21 can be changed accordingly. The conveyance of the cut sheet 29 is stopped when the end of the cut sheet 29 close to the bias ply 32 overlaps with the terminal end 32a of the bias ply 32. Guide 37, moving table 38, and vacuum cup 39 described above
Constitutes the aforementioned transport means 36 as a whole. When the moving table 38 and the vacuum cup 39 are used as the transporting means 36, the cutting sheet 29 can be quickly transported to a predetermined position without being damaged.

Reference numeral 43 denotes a rotatable press roll as a joining means. The press roll 43 is provided immediately above the bias ply 32 with a predetermined gap formed between the press roll 43 and the second conveyor 31. It extends in the width direction of the conveyor 31.
When the bias ply 32 and the cutting sheet 29 are conveyed toward the downstream side by the second conveyor 31, and when these pass through the pressing roll 43, the bias ply 32 and the cutting sheet 29 By pressing and pressing between the two conveyors 31, these are joined at the overlapping portion, and the cut sheet 29 is integrated with the bias ply 32. If the joining means is constituted by the rotatable pressing roll 43 as described above, the above-described transport and joining can be performed very easily at the same time, and the conventional pressing bar having a large and complicated mechanism can be moved up and down. Therefore, it is possible to eliminate the need for a joining device, thereby making the molding device simple in structure and inexpensive. Then, the bias ply 32 formed in a long belt shape as described above is thereafter wound up in a roll shape by a winder.

Next, the operation of the embodiment of the present invention will be described. When the bias ply 32 is formed from the belt-like member 24 as described above, the motor is operated to run the flat belt 23 of the first conveyor 21, and the belt-like member 24 is conveyed forward by a predetermined distance. As a result, the starting end of the band-shaped member 24 located immediately below the cutting means 27 reaches a position a predetermined distance away from the cutting means 27 in front. Next, when the motor is operated to move the cutter 28 of the cutting means 27 in the longitudinal direction of the cutting means 27, the cutter 28
The upper band-like member 24 is cut obliquely at a predetermined acute angle A with respect to the width direction, and is cut into a parallelogram cut sheet 29 from the band-like member 24.
Cut out.

Next, after the vacuum cup 39 of the conveying means 36 is lowered and brought into contact with the cutting sheet 29, the switching valve is opened and a vacuum is led to the vacuum cup 39. The side end of the second conveyor 31 is sucked. In this state, when the servomotor is operated to move the movable table 38 along the guide 37 toward the bias ply 32,
The cutting sheet 29 is transferred from the first conveyor 21 to the second conveyor 31 by the conveying means 36. The movement of the moving table 38 is such that the end of the cutting sheet 29 close to the bias ply 32 is the end of the bias ply 32. It stops when it overlaps the part 32a. Next, the switching valve is switched to the closed state to separate the vacuum cup 39 from the vacuum source, and at the same time, forcibly separating the vacuum cup 39 by blowing out air, and the cutting sheet 29 is separated from the vacuum cup 39 and delivered to the second conveyor 31. It is. Next, after raising the vacuum cup 39, the moving table 38 is moved to the first conveyor.
Move toward 21 and return to the initial position. here,
Since the end of the bias ply 32 is always apart from the upstream end of the second conveyor 31 by the distance between the side ends 29b of the cutting sheet 29, the bias ply 32 and the cutting sheet 29 are placed on the second conveyor 31 together. Will be done. Further, since the transfer means 36 is installed above the first and second conveyors 21 and 31, a floor space for installing the transfer means 36 is unnecessary, and as a result, the entire apparatus is reduced in size. be able to.

Next, when the motor is operated to run the narrow belt 33 of the second conveyor 31, both the bias ply 32 and the cutting sheet 29 are conveyed in a direction away from the first conveyor 21. When the overlapped portion of the bias ply 32 and the cutting sheet 29 passes directly below the press roll 43 by the conveyance, the press roll 43 presses the overlapped portion against the second conveyor 31 and joins them, and the cutting sheet 29 is joined to the bias ply 32. To be integrated. Thereafter, the detection sensor 34 is connected to the bias ply 32 (the cut sheet 2 joined and integrated).
After detecting the end of 9), the detection sensor 34 continues to run the second conveyor 31 for a predetermined distance after this detection, and stops the end of the bias ply 32 at a specified position. As described above, since both the bias ply 32 and the cutting sheet 29 are placed on the second conveyor 31, the joining operation of the bias ply 32 and the cutting sheet 39 and the conveying operation of the bias ply 32 are performed as described above. At the same time, thereby improving work efficiency. Here, after the above-mentioned joining / transporting operation is completed, the above-mentioned carrying / cutting operation of the band-shaped member 24 may be sequentially performed.
Since the work is performed only on the conveyor 31, it is preferable to carry out the work of transporting the band-shaped member 24 and the work of cutting the band-shaped member 24 on the first conveyor 21 at the same time as the joining / transporting work,
By doing so, the work efficiency can be further improved. In this way, the cutting sheet 29 is successively added to the end of the bias ply 32, and the long belt-like bias ply is
When the bias ply 32 is formed, the bias ply 32 is wound into a roll by a winder.

In the above-described embodiment, the vacuum cup 39 is used as the conveying means 36. However, in the present invention, when the embedded cord is steel, a permanent magnet can be used. , Cutting sheet 29
May be used. Instead of the above-described vacuum cup 39, a vacuum duct that lifts the cutting sheet 29 while sucking the cutting sheet 29 by sucking air from a number of duct holes formed on the lower surface may be used.

[0017]

As described above, according to the present invention, a bias ply can be formed with high efficiency while being small in size and simple in structure.

[Brief description of the drawings]

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

FIG. 2 is a view taken in the direction of arrows II in FIG. 1;

FIG. 3 is a schematic plan view showing an example of a conventional molding apparatus.

[Explanation of symbols]

 21 ... First conveyor 24 ... Band-shaped member 27 ... Cutting means 29 ... Cutting sheet 29a ... Cutting end 31 ... Second conveyor 32 ... Bias ply 32a ... Terminal part 36 ... Conveying means 38 ... Mounting table 39 ... Vacuum cup 43 ... Joining means A: acute angle

Claims (5)

[Claims] 1. A step of cutting a strip having a plurality of cords extending in a longitudinal direction embedded therein at an oblique angle at a predetermined acute angle with respect to a width direction to cut out a parallelogram-shaped cutting sheet; A step of superimposing an end near the bias ply of the cut sheet on an end of a preformed bias ply in which a cord which is conveyed along the extending direction of the cut end and has a cord extending obliquely therein is embedded, Bonding the bias ply and the cutting sheet at an overlapping portion while conveying both the ply and the cutting sheet along the extending direction of the cutting end to integrate the cutting sheet with the bias ply. Bias ply molding method. 2. The method for forming a bias ply according to claim 1, wherein the bias ply and the cutting sheet are joined by pressing a rotatable pressing roll against the bias ply and the cutting sheet being conveyed. 3. A first conveyor for transporting in a longitudinal direction a belt-like member in which a number of cords extending in a longitudinal direction are embedded, and a belt-like member on the first conveyor is inclined at a predetermined acute angle with respect to the width direction. A cutting means for cutting to cut a parallelogram-shaped cutting sheet, and a cutting means installed on the side of the first conveyor, extending along the direction in which the cut end of the cutting sheet extends, and joining the cut sheets together to form an internal A second conveyor for transporting a preformed bias ply in which a cord extending obliquely is embedded in the longitudinal direction, and a second sheet extending along the second conveyor above the first and second conveyors, and cutting the cut sheet at the cut end. Conveying means for conveying the cut sheet along the extending direction onto the second conveyor and superposing an end of the cut sheet close to the bias ply on an end of the bias ply; , When the cutting sheet is conveyed, the molding device of a bias ply, characterized in that a joining means for integrating the cut sheets are joined at portions overlapping the bias-ply and cut sheet to the bias-ply. 4. The conveying means has a moving table that moves along the direction in which the cutting end of the cutting sheet extends, and a plurality of vacuum cups attached to the moving table and capable of sucking the cutting sheet. 4. The apparatus for forming a bias ply according to claim 3. 5. The joining means has a rotatable press roll extending in the width direction of the second conveyor, and presses the press roll against a bias ply and a cutting sheet being conveyed.
The bias ply forming apparatus according to claim 3, wherein the bias ply and the cutting sheet are joined.