JP6514543B2 - Method and apparatus for manufacturing rubber sheet containing steel cord - Google Patents

Description

  The present invention relates to a method for producing a rubber sheet containing a steel cord, such as a rubber sheet for automobile tire reinforcement, and a production apparatus suitable for carrying out such a production method.

  Generally, in radial tires, a long (several hundreds of meters to a few tens of thousands of meters) steel cords are arranged in parallel on hundreds of rubber sheets to produce a calendar sheet sandwiched between two rubber sheets. . The calender sheet is cut obliquely based on the width to be bonded to the tire and the bias angle, and formed into a reinforcing rubber sheet which is a strip. Further, the reinforcing rubber sheet is laminated to form a tire prototype, which is put into a mold and vulcanized at high temperature and high pressure to produce a radial tire.

  In the conventional method of manufacturing a reinforcing rubber sheet, it has been considered that the larger the working amount of steel cord used, that is, the larger the winding amount of the spool, the longer the calendering operation time and the better the efficiency. Also in the processing of steel cords, the final twisting process has been devised so that a product as long as possible can be produced since the longer the product length, the better the processing efficiency. That is, improvements have been made to necessarily enlarge the rotating portion of the stranding machine in the direction of increasing the spool capacity of the material and increasing the product spool.

  As a stranding machine, what is generally used is roughly classified into a tubular type having a single twist per cylindrical rotation and a buncher type having a double twist per rotation. The effective energy consumption rate of all the stranding machines is 10% or less, and the energy loss is large. This is considered to be due to mechanical loss for rotating a heavy object at high speed and loss due to air resistance of a high speed rotating body.

  In recent years, with the improvement of the performance of automobiles, the quality requirements for automobile tires are diversified, and in order to meet various demands from users, the types of automobile tires are also increasing. In order to respond to these requirements by the standard mass production method as in the prior art, it is unreasonable in terms of cost etc., and it is necessary to use a new production method which can be processed completely through space saving.

  With regard to the method of producing steel cords, continuing to use an energy-inefficient stranding machine leads to a cost reduction of the reinforcing rubber sheet and thus the automobile tire using it. Furthermore, although the calender sheet manufactured by the conventional manufacturing method is comprised by the steel cord which consists of plated wire (steel wire), when a calender sheet is cut | disconnected to predetermined length, the cutting edge part Then the iron base of the wire will be exposed. Since this cut end has no plating, there arises a problem that adhesion with rubber can not be achieved.

  The car tire is subject to distortion due to the weight of the car while the car is traveling. Furthermore, at the time of cornering, the maximum load acts on the shoulder portion of the automobile tire and the turn-up end portion of the ply layer, but the automobile tire is structured such that the cut portion is located at this portion. Moreover, in recent years, the flattening of automobile tires has progressed and the tire width has become wider, but the wider the tire width becomes, the larger the distortion of the shoulder portion becomes, and the existence of the above-mentioned unbonded portion is further regarded as a problem It has become.

  A reinforcing rubber sheet for steel tires is a member embedded in a tire as a reinforcing material that suppresses deformation of the tire during traveling, but since the internal steel cord is cut, the effect of rigidity possessed by the steel cord is In addition to lowering the cornering force of the tire, it is also a cause of reducing tire life due to tread wear due to deformation.

  Therefore, the present inventors do not need unnecessary energy for stranding of steel cords, and moreover, the steel cords are not cut, and the production method of the tire is reduced to a small number of lots and wasted space. And the manufacturing method of the rubber sheet for reinforcement for automobile tires which can eliminate useless transportation was developed (patent documents 1). According to the manufacturing method of Patent Document 1, it is possible to manufacture a tire reinforcing rubber sheet having no cut portion in a steel cord held therein by a series of continuous steps.

Patent No. 4669405 gazette

  According to the invention disclosed in Patent Document 1, it is possible to easily produce a steel cord in which the twisting direction alternately exists in the S direction and the Z direction, and to provide a tire reinforcing rubber sheet having no cut portion in the steel cord. It is possible to manufacture by a series of continuous processes. However, after producing the steel cord, there is a problem that the mechanism for bending it continuously and arranging in parallel on the rubber sheet is complicated, and the production speed is slow. In addition, it is difficult to stabilize the bending position of the steel cord, and the intended characteristics of the tire reinforcing rubber sheet may not be sufficiently exhibited.

  The present invention is suitable for a method of producing a rubber sheet containing a steel cord capable of folding a steel cord easily, stably and continuously, and placing it on a flat surface, and is suitable for carrying out such a production method. The purpose is to provide a manufacturing apparatus.

  The present inventors diligently studied to solve the above problems. As a result, the steel cord is fixed using two chucks whose installation position is fixed, one chuck movable vertically and horizontally, and one chuck movable linearly in the conveyor conveyance direction. The inventors have found that if the steel cord is opened by the four chucks and the steel cord is bent, the steel cord can be placed on a flat surface in a stably bent state, thereby completing the present invention.

Specifically, the present invention
A method of manufacturing a rubber sheet containing a steel cord,
Step A of continuously bending the steel cords and arranging them on a rubber sheet arranged on a conveyor;
A step B of holding the form of the bent steel cord;
Process C of holding the bent steel cord between two rubber sheets,
Have
In the step A, the steel cord is fixed and released by the first chuck, the second chuck, the third chuck and the fourth chuck,
Here, the first chuck and the third chuck are chucks whose positions are fixed,
The first chuck is disposed between a steel cord supply source for feeding a steel cord and the second chuck.
The third chuck and the fourth chuck are disposed above the conveyor, arranged in a pair in the horizontal direction so as to be approximately equidistant to the first chuck, and a straight line connecting the both is a conveyor It is arranged obliquely to the transport direction,
The second chuck is a chuck provided on a support member and moving vertically and horizontally in the horizontal direction,
The fourth chuck is a chuck that moves by the bending pitch of the steel cord along the conveyor conveyance direction,
In the step A,
(1) The third chuck and the first chuck fix a steel cord,
Fixing or hooking a steel cord at a portion where the second chuck is approximately equidistant between the first chuck and the third chuck;
(2) With the third chuck securing the steel cord, the first chuck may be released, and with the second chuck securing or hooking the steel cord, the fourth chuck may secure the steel cord Move to the position and carry the steel cord,
The fourth chuck fixes the steel cord transported by the second chuck,
(3) open the second chuck and fix the steel cords arranged on the conveyor by the step B,
( 4 ) After the third chuck is released and the conveyor is moved, the second chuck is moved to a portion where the distance between the fourth chuck and the first chuck is approximately equal. , Fix or hook the steel cord,
(5) before Symbol third chuck to a position capable of fixing the steel cord, the steel cord is conveyed to move in a state in which the second chuck to secure the steel cord or hook and,
The third chuck fixes the steel cord transported by the second chuck,
(6) releasing the second chuck and fixing the steel cords arranged on the rubber sheet in the step B;
(7) The first chuck fixes the steel cord,
Fixing or hooking a steel cord at a portion where the second chuck is approximately equidistant between the first chuck and the third chuck;
(8) Thereafter, repeat the items ( 2 ) to (7) sequentially,
The present invention relates to a method of manufacturing a rubber sheet containing a steel cord characterized by the above.

The present invention is also
A manufacturing apparatus of a rubber sheet containing a steel cord,
A first chuck, a second chuck, a third chuck and a fourth chuck for fixing the steel cord;
A conveyor for conveying the bent steel cord;
Form holding means for holding the form of folded steel cords arranged on a rubber sheet arranged on a conveyor;
A rubber sheet conveying device for conveying a rubber sheet;
Equipped with
Each of the first chuck, the second chuck, the third chuck and the fourth chuck has a function of fixing and releasing a steel cord,
Here, the first chuck and the third chuck are chucks whose positions are fixed,
The first chuck is disposed between a steel cord supply source for feeding a steel cord and the second chuck.
The third chuck and the fourth chuck are positioned above the conveyor, arranged in pairs in the horizontal direction so as to be equidistant to the first chuck, and the straight line connecting the two conveys the conveyor It is arranged diagonally to the direction,
The second chuck is a chuck provided on a support member and moving vertically and horizontally in the horizontal direction,
The fourth chuck relates to an apparatus for manufacturing a rubber sheet containing a steel cord, wherein the fourth chuck is a chuck that moves by a bending pitch of the steel cord along a conveyor conveyance direction.

The apparatus for producing a rubber sheet containing the steel cord of the present invention is
(1) The third chuck and the first chuck fix a steel cord,
Securing or hooking a steel cord at a portion where the second chuck is approximately equidistant between the first chuck and the third chuck;
(2) With the third chuck securing the steel cord, the first chuck may be released, and with the second chuck securing or hooking the steel cord, the fourth chuck may secure the steel cord Move to the position and carry the steel cord,
The fourth chuck fixes the steel cord transported by the second chuck,
(3) opening the second chuck and holding the bent form of the steel cord on the rubber sheet by the form holding means;
( 4 ) After the third chuck is released and the conveyor is moved, the second chuck is moved to a portion where the distance between the fourth chuck and the first chuck is approximately equal. , Fix or hook steel cord,
(5) before Symbol third chuck to a position capable of fixing the steel cord, the steel cord is conveyed to move in a state in which the second chuck is hooked fixed or steel cords,
The third chuck fixes the steel cord transported by the second chuck,
(6) opening the second chuck and holding the bent form of the steel cord on the rubber sheet by the form holding means;
Open the fourth chuck,
(7) The first chuck fixes the steel cord,
Fixing or hooking a steel cord at a portion where the second chuck is approximately equidistant between the first chuck and the third chuck;
(8) After that, repeat items (2) to (7) sequentially,
Is preferred.

  In the method disclosed in Patent Document 1, a steel cord is passed between a bending device and a forming roller, and the steel cord is bent between a convex portion and a concave shape. On the other hand, the manufacturing method and the manufacturing apparatus of the present invention use two position fixing chucks and two movable chucks to fix and release the steel cord, and fix one end of the steel cord by the position fixing chuck. By moving the movable chuck with the steel cord fixed, it is characterized in that the steel cord is bent constantly and continuously. Due to this feature, in the manufacturing method and manufacturing apparatus of the present invention, the steel cord can be efficiently folded and arranged on a plane.

In the production method of the present invention,
It is preferable to perform the said process B, after clamping the bending part of a steel cord in the said process A with a holding member and shape | molding it.

Moreover, the manufacturing apparatus of the present invention is
It further comprises a gripping member for sandwiching the steel cord,
It is preferable that the bending portion be shaped by sandwiching the bending portion of the steel cord by the holding member.

  The steel cord preferably comprises a plurality of strands or a plurality of strands and a strand cord or a plurality of strand cords.

In the production method of the present invention,
The steel cord is a steel cord in which a portion in which the twisting direction is the S direction and a portion in which the twisting direction is the Z direction exist alternately with the same length, and a non-twisted portion exists between the two.
It is preferable to arrange | position directly or indirectly continuously on a conveyor after bending in the part which does not have a twist in the said process A.

Similarly, in the manufacturing apparatus of the present invention,
The steel cord is a steel cord in which a portion in which the twisting direction is the S direction and a portion in which the twisting direction is the Z direction exist alternately with the same length, and a non-twisted portion exists between the two.
In the step A, the first chuck, the second chuck, the third chuck, and the fourth chuck respectively fix and release the untwisted portion of the steel cord, and the steel cord is continuously formed in the untwisted portion. It is preferable to arrange | position directly or indirectly on a conveyor after bending.

  According to the manufacturing method or the manufacturing apparatus of the present invention, the steel cord has a constant length and efficiency as compared with the conventional manufacturing method or manufacturing apparatus of a rubber sheet containing a steel cord such as a tire reinforcing rubber sheet. It is possible to fold continuously and arrange directly or indirectly on the conveyor.

It is a schematic diagram showing an example of a twist processing process in patent documents 1. It is an external view which shows an example of the steel cord manufactured by the process process shown by FIG. It is a schematic block diagram which shows an example of the manufacturing apparatus (1st embodiment) of this invention, (a) is a top view, (b) shows a side view. It is a conceptual diagram which shows operation | movement of the 1st chuck | zipper 21-4th chuck | zipper 26 of the manufacturing apparatus shown by FIG. 3 (a). It is a conceptual diagram which shows operation | movement of the bar roller 30, and conveyance of the rubber sheet 28 after FIG. 4 (b). It is a conceptual diagram which shows operation | movement of the 1st chuck | zipper 21-4th chuck | zipper 26 after FIG.5 (b). It is a conceptual diagram which shows the operation | movement of the 1st chuck | zipper 21-the 4th chuck | zipper 26 after FIG.6 (b). It is a conceptual diagram which shows operation | movement of the 1st chuck | zipper 21-4th chuck | zipper 26 after FIG.7 (b). It is an external view of the rubber sheet obtained after process B of this invention. It is a conceptual diagram which shows the supply method of the steel cord with which the form holding means and two rubber sheets in 2nd embodiment were held between two sheets, (a) is a top view, (b) is a side view.

  Embodiments of the present invention will be described with reference to the drawings as appropriate. Here, although manufacture of a rubber sheet for automobile tire reinforcement is explained by using a rubber sheet containing a steel cord, the present invention is not limited to the following description.

First Embodiment
(Production of steel cord)
FIG. 1 is a schematic view showing an example of the twisting process of Patent Document 1. As shown in FIG. In FIG. 1, reference numeral 1 denotes a strand, and a plurality of strands 1 are pulled out from the pay-out reel 8 while being subjected to tension. Each strand 1 is determined by the separation plate 2 so that the rows of the strands do not interleave each other, and a certain length is drawn out and stopped by the drawing roller 4 also serving as a delivery. Here, the fixed length is a length corresponding to the distance between the chuck 3a and the chuck 3b described later. The plurality of strands 1 may be a combination of a plurality of strands and strand cords, or may be a plurality of strand cords, but it is most preferable that they are two strands.

  The plurality of wires 1 (wire bundle 1a) which have been pulled out and stopped for a predetermined length are a plurality of wires 1 by a pair of chucks 3a and 3b and a third chuck 3c disposed approximately at the center of the chucks The wire 1 is gripped with a strength that can not freely rotate. The distance between the chuck 3a and the chuck 3c (and the distance between the chuck 3b and the chuck 3c) is a length that takes into account the reduction (twist reduction) of the length of the steel cord after the end of the twisting process. And the length of the steel cord from one end to the other end in consideration of the bias angle of the reinforcing layer embedded in the tire.

  In the example of FIG. 1, the downstream chuck 3b is attached to the base 7 movably in the left and right direction in FIG. 2 in order to compensate for twisting and thinning in the twisting process. The code | symbol 6 shows the spring for return at the time of grip release. The upstream chuck 3a may be movable, or the chucks 3a and 3b may be movable, but in any case, the movable chuck is provided with a return spring 6 at the time of releasing the grip.

  After the wire bundle 1a is gripped by the pair of chucks 3a and 3b and the third chuck 3c with strength that can not freely rotate at three points, the chuck 3c is rotated. By rotating the chucks 3c, the wire bundle 1a is twisted, and the wire bundle 1a between the three chucks becomes a steel cord twisted in the S direction and the Z direction. That is, the steel cord twisted on the left side with "S twist" and the right side with "Z twist" on both sides of the 3rd chuck | zipper 3c is obtained (refer FIG. 2). When the rotational direction of the third chuck 3c is set to be opposite, it is possible to make the left and right twists opposite to this.

  After giving the steel cord a rotation based on the required specifications, the rotation of the third chuck 3c is once stopped, and then the third chuck 3c is reversely rotated to remove the residual stress of torsion. Next, the gripping of the chucks 3a, 3b and 3c is released, and the steel cord 5 is pulled out between the pair of chucks 3a and 3b by driving the drawing roller 4. Thus, the next wire bundle 1a is continuously fed between the chucks 3a and 3b. When the gripping of the chucks 3a and 3b and the chuck 3c is released, the moving chuck 3b returns to its original position by the restoring force of the return spring 6.

  In the above-described method for producing a steel cord, the means for removing the residual stress of twisting may be a mechanism capable of releasing the chuck 3c after twisting, and the residual twist may be removed using the return force of the steel cord.

  The extracted steel cord 5 has a shape in which "S twist portions" and "Z twist portions" are alternately present, with the portion held by the chuck 3c as a boundary. FIG. 2 shows an external view of the steel cord 3. Reference symbols A1 to A3 denote "non-twisted portions" corresponding to the portions gripped by the chucks 3a, 3c and 3b, respectively. The code | symbol B is a "S twist part", and the code | symbol C is a "Z twist part." By repeating the above steps, it is possible to manufacture a steel cord in which “S twist parts” and “Z twist parts” having a predetermined length are alternately formed.

  The steel cords 5 produced in this manner are sequentially sent to the stamping process which is continuous to the twisting process. In the invention disclosed in Patent Document 1, the steel cord 5 is sandwiched between a concave portion provided on a molding roller and a convex portion provided on the molding roller as a molding step, and bending is performed.

  The manufacturing method and apparatus of the present invention may perform bending of the steel cord 5 while manufacturing the steel cord 5 by executing the twisting process of Patent Document 1, but the steel cord 5 is manufactured in advance, Bending may be performed on the steel cord 5 wound on a reel. In addition, a single wire wire or a plurality of wires which are not twisted, or a steel cord which has no “non-twisted portion” and is twisted only in a certain direction may be used.

(Bending and arrangement of steel cord / process A and process B)
FIG. 3 is a schematic configuration view showing an example of the production apparatus of the present invention, in which (a) shows a top view and (b) shows a side view. In FIGS. 3 (a) and 3 (b), after the single wire wire is fed from the two delivery reels 8, the steel cord 5 is fed to the delivery roller 4 through the separation plate 2, the chuck 3a, the chuck 3c and the chuck 3b. Be The steel cord 5 is further disposed in a bent state on a rubber sheet 28 conveyed by the conveyor 29 through a dancer roller 9, a first chuck 21, a second chuck 23, and a third chuck 24.

  In FIG. 3, the supply reel 8 to the delivery roller 4 are the steel cord supply source, but the steel cord 5 may be manufactured in advance and wound around the reel for storage. In this case, a reel containing the steel cord 5 is a supply source of the steel cord 5.

  The steel cord 5 supplied from the steel cord supply source is supplied to the second chuck 23 via the first chuck 21. The installation position of the first chuck 21 is fixed. The second chuck 23 is provided on the support member 22b, and can move the right end portion of the support member 22b in the vertical direction. The support member 22b is connected to the lower portion of the support member 22a, and can move the lower portion of the support member 22a in the vertical direction. As a result, the second chuck 23 is a chuck that can move vertically and horizontally in the horizontal direction. The support member 22b is installed so that the second chuck 23 always stays above the rubber sheet.

  Furthermore, the steel cord 5 is supplied to the third chuck 24 via the second chuck 23. The third chuck 24 is supported by the support member 25 so as to be at a position where the steel cord 5 is bent above the rubber sheet 28. A fourth chuck 24 is provided above the rubber sheet 28 at a target position with respect to the first chuck 21. The fourth chuck 26 is supported by the support member 27 so as to be at a position where the steel cord 5 is folded above the rubber sheet 28.

  The distance between the third chuck 24 and the fourth chuck 26 is adjusted to be approximately half the distance between the first chuck 21 and the third chuck 24 or the fourth chuck 26.

  The third chuck 24 and the fourth chuck 26 are positioned above the rubber sheet 28 and arranged in a pair in the horizontal direction so as to be approximately equidistant to the first chuck 21. Further, a straight line connecting the two is disposed obliquely with respect to the conveyance direction of the rubber sheet 28. The rubber sheet 28 is conveyed by the conveyor 29 from the lower left to the upper right in FIG. The installation position of the third chuck 24 is fixed. On the other hand, the fourth chuck 26 can move by the bending pitch of the steel cord along the conveyor conveyance direction.

  FIG. 4 is a conceptual view showing the operation of the first chuck 21 to the fourth chuck 26 shown in FIG. 3 (a). Here, although the case where the front end of the steel cord 5 is fixed to the third chuck 24 will be described, the operation is the same when the installation positions of the third chuck 24 and the fourth chuck 26 are reversed.

  When the steel cord 5 is a steel cord having a “non-twisted portion” as shown in FIG. 2, the distance between the first chuck 21, the second chuck 23, the third chuck 27 and the fourth chuck 27 is It is preferable to adjust the distance between the "non-twisted portions" of the steel cord so that the four chucks respectively fix the "non-twisted portions" of the steel cords. This is because the "non-twisted portion" is the most easily bendable portion in the steel cord.

  In FIGS. 4-8, the steel cord which "Z twist part", "non-twist part", and "S twist part" continue in order from the front-end | tip part is made into object. The first "Z twist portion" is described as "Z1", and the n-th twist portion is described as "Zn". The same applies to "S twist portion".

  First, the steel cord 5 is passed through the released first chuck 21 and the Z1 tip is fixed to the third chuck 24. Thereafter, the steel cord 5 is slightly rewound in the left direction in the drawing, and the first chuck 21 is closed and fixed with the slack removed. Thereafter, the second chuck 23 is moved and fixed to a point P (non-twisted portion) which is substantially an intermediate position between the first chuck 21 and the third chuck 24 in the steel cord 5 (FIG. 4 (a)) .

  The first chuck 21 is released, and the third chuck 24 is kept fixed. The fourth chuck 26 is also opened. In that state, the second chuck 23 is moved to the vicinity of the fourth chuck 26 while the steel cord 5 is fixed. The fourth chuck 26 fixes the steel cord moved by the second chuck 23 (FIG. 4 (b)). Thereby, Z1 of the steel cord 5 is disposed on the rubber sheet 28 by the third chuck 24 and the fourth chuck 26.

  FIG. 5 is a conceptual view showing the operation of the bar roller 30 and the conveyance of the rubber sheet 28 after FIG. 4 (b). After the fourth chuck 26 fixes the steel cord 5, the second chuck 23 is released, and the support member 22b is moved to the left in the figure. At this time, the third chuck 24 and the fourth chuck 26 keep the steel cord 5 fixed. Thereafter, the bar roller 30 (press device) is lowered. Z1 disposed on the rubber sheet 28 is fixed to the rubber sheet 28 by being pressed from above onto the bar roller 30 (FIG. 5 (a)).

  With the third chuck 24 open and the fourth chuck 26 closed, the rubber sheet 28 is conveyed by the conveyor 29 in the upper right direction in the figure. The distance by which the rubber sheet 28 is transported is the same as the bending pitch of the steel cord 5. At this time, the fourth chuck 26 (and the support member 27 of the fourth chuck) moves along the rubber sheet conveyance direction by the same distance as the rubber sheet 28 (FIG. 5 (b)).

  Here, in the state shown in FIG. 5A, if the steel cord 5 in the vicinity of the fourth chuck 26 is pinched by a gripping member (not shown) before the bar roller 30 is lowered, the steel cord 5 Since it is possible to attach a shape (unique) to the bent portion, the form of the bent steel cord 31 is easily retained after being disposed on the rubber sheet 28. An example of the gripping member is a gripping device consisting of two pins or flat plates.

  FIG. 6 is a conceptual view showing the operation of the first chuck 21 to the fourth chuck 26 after FIG. 5 (b). The second chuck 23 is moved to a point Q (non-twisted portion) which is approximately the middle position between the first chuck 21 and the fourth chuck 26 in the steel cord 5, and the point Q is fixed (FIG. 6 (a)) ).

  Next, the second chuck 23 with the steel cord 5 fixed is moved to the vicinity of the third chuck 24. The third chuck 24 fixes the steel cord moved by the second chuck 23 (FIG. 6 (b)). Thereby, Z1 and S1 of the steel cord 5 are arranged on the rubber sheet 28 in a bent state.

  FIG. 7 is a conceptual view showing the operation of the bar roller 30 and the conveyance of the rubber sheet 28 after FIG. 6 (b). After the third chuck 24 fixes the steel cord 5, the second chuck 23 is released, and the support member 22b is moved to the left in the figure. At this time, the third chuck 24 and the fourth chuck 26 keep the steel cord 5 fixed. Thereafter, the bar roller 30 is lowered. S1 disposed on the rubber sheet 28 is fixed to the rubber sheet 28 by being pressed from above onto the bar roller 30 (FIG. 7A).

  Even in the state shown in FIG. 7A, if the steel cord 5 in the vicinity of the fourth chuck 26 is held between the gripping members (not shown) before lowering the bar roller 30, the steel cord 5 is bent. Since the mold can be attached to the part, after being placed on the rubber sheet 28, the form of the bent steel cord 31 can be easily retained.

  Thereafter, the fourth chuck 26 is returned to the initial position (the same position as FIG. 4A). The second chuck 23 is moved to a point R (non-twisted portion) which is a substantially intermediate position between the first chuck 21 and the third chuck 24 to fix the point R. Thereafter, the second chuck 23 with the steel cord 5 fixed is moved to the vicinity of the fourth chuck 26. The fourth chuck 26 fixes the steel cord moved by the second chuck 23 (FIG. 7 (b)). Thus, the steel cord 5 is disposed on the rubber sheet 28 in a state in which Z1, S1, and Z2 of the steel cord 5 are bent.

  Also in the state shown in FIG. 7B, the steel cord 5 in the vicinity of the third chuck 24 may be configured to be sandwiched by the gripping members.

  FIG. 8 is a conceptual view showing the operation of the first chuck 21 to the fourth chuck 26 after FIG. 7 (b). After the fourth chuck 26 fixes the steel cord 5, the second chuck 23 is released. The second chuck 23 is moved to a point T (non-twisted portion) which is an intermediate position between the first chuck 21 and the third chuck 24 and fixed. On the other hand, Z1 disposed on the rubber sheet 28 is pressed from above by the bar roller 30 (press device) and fixed to the rubber sheet 28.

  Thereafter, the steel cord 31 in which the “Z twist portion” and the “S twist portion” are alternately bent is fixed on the rubber sheet 28 by sequentially repeating the operations shown in FIGS. 4 to 8. .

  As described above, in the present invention, by sequentially repeating the operations shown in FIGS. 4 to 8, it is possible to bend the steel cord at a predetermined position uniformly and efficiently arrange it on the rubber sheet. By adjusting the positions of the rubber sheet and the four chucks, it is also possible to fold and arrange the steel cord at a predetermined position on the rubber sheet. In addition, the steel cord amount (length) per unit area of the rubber sheet can be adjusted by reducing the folding pitch by the conveyor. The rubber sheet in which the steel cords are arranged has an appearance as shown in FIG.

  Even for single-wire wires or multiple wires without twist processing of steel cords, or steel cords without “non-twisted parts” and twisted only in a certain direction, the operations shown in FIGS. It is possible to arrange folded steel cords on a rubber sheet. The type and arrangement of the steel cords used, the material and dimensions of the rubber sheet, etc. are preferably selected appropriately depending on the purpose of use.

(Steel cord pinching with rubber sheet / Process C)
The rubber sheet in which the bent steel cords are arranged is laminated with another rubber sheet of the same size so that the steel cord is sandwiched between the two rubber sheets. Thereafter, the two rubber sheets are pressure-bonded and integrated by passing between a pair of rollers or the like. An adhesive may be applied before lamination.

  As a rubber sheet, a rubber sheet whose material is butadiene rubber, styrene butadiene rubber, isoprene rubber or natural rubber can be used. An adhesive may be applied before laminating the two rubber sheets.

  The laminate thus produced is used as a tire reinforcing rubber sheet as a component of an automobile tire such as a radial tire. In addition, the tire reinforcing rubber sheet may be used in combination with another rubber sheet or member as necessary. Furthermore, the tire reinforcing rubber sheet may be used as a component of an automobile tire after being heated, pressurized, or chemically treated.

Second Embodiment
In the first embodiment, the folded steel cord 31 is indirectly disposed on the conveyor 29 via the rubber sheet 28 placed on the conveyor 29. However, unlike the first embodiment, after the folded steel cord 31 is not disposed on the rubber sheet but disposed on the conveyor (on a plane), the two rubber sheets are retained while maintaining the form. May be held between the

  That is, in the present embodiment, the steel cord 31 bent on the conveyor 29 (flat surface) is directly disposed, and is folded between two rubber sheets while maintaining the form of the steel cord 31 by the form holding means. The steel cord 31 is supplied. As a form holding means of this embodiment, a bar roller or a flat press can be used.

  FIG. 10 is a conceptual view showing a method of supplying a bent steel cord between the form holding means and the two rubber sheets in the present embodiment, wherein (a) is a top view and (b) is a side view. . The steel cords 31 folded on the conveyor 29 are conveyed by the conveyor 29 in the right direction in the figure. By installing a plurality of bar rollers or flat plate presses on the conveyor 29, it is possible to maintain the form of the steel cords 31 until the bent steel cords 24 are fed between the two rubber sheets. It becomes possible. In FIG. 10, the steel cords 31 folded by the bar rollers 32a, 32b and 32c are pressed to the conveyor 29, and the form of the folded steel cords 31 is maintained.

  In the case of the first embodiment, it is possible to fix the bent steel cord 31 on the rubber sheet 28 by pressing from above by the bar roller 30. However, in the present embodiment in which the bent steel cord 31 is indirectly disposed on the conveyor 29 and then sandwiched between the two rubber sheets, the bent steel cord 31 is clamped between the two rubber sheets. Until then, the form needs to be held by the holding means.

  Although three bar rollers are shown in FIG. 10, it is sufficient that the form holding means has a function capable of transferring the steel cord 31 bent to the delivery rollers 34a and 34b. As the form holding means, besides the bar roller, a flat plate press which presses the conveyor 29 from above can also be used. In addition, pin-like members for fixing the bent portion of the steel cord can also be used. Furthermore, a conveyor provided with a magnet sheet may be used as the conveyor 29, and the bent steel cord 31 may be fixed to the conveyor 29 by a magnetic force. The form holding means may be used alone or in combination.

  The folded steel cord 31 having passed through the bar rollers 32 a to 32 c is further transported onto the conveyor 36. As shown in FIGS. 10 (a) and 10 (b), delivery rollers 34a and 34b for rubber sheets are provided in front of the conveyor 36, and two rubber sheets 33a and 33b from above and below are provided. It is supplied to the delivery rollers 34a and 34b. The folded steel cord 31 is supplied between the delivery rollers 34a and 34b so as to be sandwiched between the rubber sheets 33a and 33b. Then, a rubber sheet (rubber sheet laminated body) 35 including the bent steel cord is formed on the conveyor 36 and sequentially conveyed rightward in FIG. 10 by the conveyor 36.

  The method and apparatus for producing a rubber sheet containing a steel cord of the present invention is useful in the fields of chemical industry, metal industry and automobile industry.

1: Wire 1a: Wire bundle 2: Separation plate 3a, 3b: Pair of chucks 3c: Third chuck 4: Delivery roller 5: Steel cord 6: Spring for return 7: Base 8: Delivery reel 21: 1st Chucks 22a and 22b: Support members 23: Second chucks 24: Third chucks 25: Support members for third chucks 26: Fourth chucks 27: Support members for fourth chucks 28: Rubber sheet 29: Conveyor 30: Bar roller ( Press equipment)
31: Folded steel cord 32a, 32b, 32c: Bar roller (form holding means)
33a: Rubber sheet (upper side)
33b: Rubber sheet (lower side)
34a, 34b: Delivery roller (for rubber sheet)
35: Rubber sheet containing folded steel cords 36: Conveyors A1, A2 and A3: non-twisted part B: S-twisted part C: Z-twisted part

Claims (8)

A method of manufacturing a rubber sheet containing a steel cord,
Step A of continuously bending the steel cords and arranging them on a rubber sheet arranged on a conveyor;
A step B of holding the form of the bent steel cord;
Process C of holding the bent steel cord between two rubber sheets,
Have
In the step A, the steel cord is fixed and released by the first chuck, the second chuck, the third chuck and the fourth chuck,
Here, the first chuck and the third chuck are chucks whose positions are fixed,
The first chuck is disposed between a steel cord supply source for feeding a steel cord and the second chuck.
The third chuck and the fourth chuck are disposed above the conveyor, arranged in a pair in the horizontal direction so as to be approximately equidistant to the first chuck, and a straight line connecting the both is a conveyor It is arranged obliquely to the transport direction,
The second chuck is a chuck provided on a support member and moving vertically and horizontally in the horizontal direction,
The fourth chuck is a chuck that moves by the bending pitch of the steel cord along the conveyor conveyance direction,
In the step A,
(1) The third chuck and the first chuck fix a steel cord,
Fixing or hooking a steel cord at a portion where the second chuck is approximately equidistant between the first chuck and the third chuck;
(2) With the third chuck securing the steel cord, the first chuck may be released, and with the second chuck securing or hooking the steel cord, the fourth chuck may secure the steel cord Move to the position and carry the steel cord,
The fourth chuck fixes the steel cord transported by the second chuck,
(3) open the second chuck and fix the steel cords arranged on the conveyor by the step B,
( 4 ) After the third chuck is released and the conveyor is moved, the second chuck is moved to a portion where the distance between the fourth chuck and the first chuck is approximately equal. , Fix or hook the steel cord,
(5) before Symbol third chuck to a position capable of fixing the steel cord, the steel cord is conveyed to move in a state in which the second chuck to secure the steel cord or hook and,
The third chuck fixes the steel cord transported by the second chuck,
(6) releasing the second chuck and fixing the steel cords arranged on the rubber sheet in the step B;
(7) open the fourth chuck,
Fixing or hooking a steel cord at a portion where the second chuck is approximately equidistant between the first chuck and the third chuck;
(8) Thereafter, repeat the items ( 2 ) to (7) sequentially,
A manufacturing method of a rubber sheet which contains a steel cord characterized by things.   The manufacturing method of the rubber sheet which includes the steel cord according to claim 1, wherein the step B is performed after the bent portion of the steel cord is sandwiched and gripped by the holding member in the step A.   The method according to claim 1 or 2, wherein the steel cord comprises a plurality of strands or a plurality of strands and a strand cord or a plurality of strand cords. The steel cord is a steel cord in which a part having a twisting direction of S and a part having a twisting direction of Z exist alternately with substantially the same length, and a part having no twist exists between the two. ,
The rubber sheet containing the steel cord according to any one of claims 1 to 3, which is disposed continuously or directly directly or indirectly on the conveyor after bending in the non-twisted portion in the step A. Manufacturing method. A manufacturing apparatus of a rubber sheet containing a steel cord,
A first chuck, a second chuck, a third chuck and a fourth chuck for fixing the steel cord;
A conveyor for conveying the bent steel cord;
Form holding means for holding the form of a folded steel cord arranged on a plane;
A rubber sheet conveying device for conveying a rubber sheet;
Equipped with
Each of the first chuck, the second chuck, the third chuck and the fourth chuck has a function of fixing and releasing a steel cord,
Here, the first chuck and the third chuck are chucks whose positions are fixed,
The first chuck is disposed between a steel cord supply source for feeding a steel cord and the second chuck.
The third chuck and the fourth chuck are positioned above the conveyor, arranged in pairs in the horizontal direction so as to be equidistant to the first chuck, and the straight line connecting the two conveys the conveyor It is arranged diagonally to the direction,
The second chuck is a chuck provided on a support member and moving vertically and horizontally in the horizontal direction,
The fourth chuck is a chuck that moves by a bending pitch of a steel cord along a conveyor conveyance direction, and the apparatus for manufacturing a rubber sheet containing a steel cord. (1) The third chuck and the first chuck fix a steel cord,
Securing or hooking a steel cord at a portion where the second chuck is approximately equidistant between the first chuck and the third chuck;
(2) With the third chuck securing the steel cord, the first chuck may be released, and with the second chuck securing or hooking the steel cord, the fourth chuck may secure the steel cord Move to the position and carry the steel cord,
The fourth chuck fixes the steel cord transported by the second chuck,
(3) opening the second chuck and holding the bent form of the steel cord on the rubber sheet by the form holding means;
( 4 ) After the third chuck is released and the conveyor is moved, the second chuck is moved to a portion where the distance between the fourth chuck and the first chuck is approximately equal. , Fix or hook steel cord,
(5) before Symbol third chuck to a position capable of fixing the steel cord, the steel cord is conveyed to move in a state in which the second chuck is hooked fixed or steel cords,
The third chuck fixes the steel cord transported by the second chuck,
(6) opening the second chuck and holding the bent form of the steel cord on the rubber sheet by the form holding means;
Open the fourth chuck,
(7) open the fourth chuck,
Fixing or hooking a steel cord at a portion where the second chuck is approximately equidistant between the first chuck and the third chuck;
(8) After that, repeat items (2) to (7) sequentially,
The manufacturing apparatus of the rubber sheet which includes the steel cord of Claim 5. It further comprises a gripping member for sandwiching the steel cord,
The manufacturing apparatus of the rubber sheet which includes the steel cord according to claim 5 or 6, wherein the bending portion of the steel cord is sandwiched by the holding member and the bending portion is shaped. The steel cord is a steel cord in which a portion in which the twisting direction is the S direction and a portion in which the twisting direction is the Z direction exist alternately with the same length, and a non-twisted portion exists between the two.
In the items (1) to (8), the first chuck, the second chuck, the third chuck, and the fourth chuck fix and release the non-twisted portion of the steel cord, respectively, at the non-twisted portion. The manufacturing apparatus of the rubber sheet containing the steel cord of Claim 6 or 7 arrange | positioning directly or indirectly on a conveyor, after bending a steel cord continuously.

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