JP2004090369A - Method for winding core wire cord on mold roll and apparatus for it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for winding a core wire cord on mold rolls by which alignment of the core wire cords between the mold rolls can be surely performed, and an apparatus for it. <P>SOLUTION: Guide rollers 101, 102, 103 and 104 with channels 111 with prescribed pitch P interval on which the core wire cord 3 runs are arranged between the mold rolls 1 and 2 in parallel to the mold rolls 1 and 2. A lead rope 120 consisting of a monofilament with an approximately same diameter as that of the core wire cord 3 is wound on one round between a pair of the mold roll 1 and 2, and the core wire cord 3 is connected with the lead rope 120 and this core wire cord 3 is fed to a standard position on the mold roll 1 which is separated from the lead rope 120 backward in the axial direction of the mold roll 1 by a specified distance. The mold rolls 1 and 2 are rotated, and on every one round of the core wire cord 3 between a pair of the mold rolls 1 and 2, the lead rope 120 is moved in the axial direction of the mold rolls 1 and 2 by a prescribed pitch P interval, to align the core wire cord 3 from one end side in the axial direction of the mold rolls 1 and 2 to the other end side by the prescribed intervals P. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
According to the present invention, in a manufacturing process of a power transmission belt, a core wire to a mold roll for spirally winding a core cord at a predetermined pitch between a pair of mold rolls arranged in parallel at a predetermined interval. The present invention relates to a method and an apparatus for winding a cord around a mold roll around which the cord is wound.
[0002]
[Prior art]
Conventionally, as a transmission belt manufacturing method, a pair of parallel mold rolls at least one of which is driven and rotated is provided so that the distance between the axes can be adjusted, and a core cord and an unvulcanized rubber are provided on these pair of mold rolls. A biaxial forming method for winding a sheet to form a transmission belt body is known.
[0003]
In the production of such a power transmission belt, first, it is necessary to spirally wind a twisted core cord between mold rolls at a predetermined pitch.
[0004]
Japanese Patent Laid-Open Publication No. 2001-205714 discloses a method of winding a cord in a manner in which the cord is spirally wound at equal intervals between integral mold rolls. Between the rolls, a rotatable guide roller having guide grooves at equal intervals in the circumferential direction on the outer peripheral surface is provided so that this axis intersects the axis of the mold roll at a predetermined angle, and a cord cord is provided. The guide wire of the guide roller is passed through and wound around a pair of mold rolls, and while applying a predetermined tension to the core cord, the pair of mold rolls are rotated, and the entire core cord is automatically made. There has been proposed one that is wound while being moved in the axial direction between the mold rolls.
[0005]
[Problems to be solved by the invention]
In this method of winding the cord, a guide roller intersects the axis of the mold roll at a predetermined angle, and the entire twisted cord is moved in the axial direction between the mold rolls. If the crossing angle of the guide rollers is not appropriate for winding, the alignment of the cords between the mold rolls may be lost.
[0006]
SUMMARY OF THE INVENTION An object of the present invention is to provide a method and an apparatus for winding a core cord around a mold roll, which can ensure alignment of the core cord between the mold rolls.
[0007]
[Means for Solving the Problems]
The invention according to claim 1 is a core cord winding method for spirally winding a core cord at a predetermined pitch between a pair of mold rolls arranged in parallel at a predetermined interval,
A guide roller having a groove at a predetermined pitch between the mold rolls and having a groove through which the cord is guided is arranged in parallel with the mold roll, and one round between the pair of mold rolls is provided. A lead rope made of a monofilament having substantially the same diameter as that of the core cord, and connecting the core cord to the lead rope. It is supplied to a reference position separated from the rope by a predetermined distance in the axial direction rearward of the mold roll, rotates the mold roll, and each time the core wire goes around between the pair of mold rollers, A lead rope is extruded and moved in the axial direction of the mold roll by the predetermined pitch interval to align the core cord at a predetermined pitch from one axial end to the other axial end of the mold roll. A.
[0008]
According to this, since the lead rope is a monofilament, the lead rope does not rotate due to the tension at the time of winding, so that the cord cord does not wind around the lead rope. Since the cord is supplied from a reference position which is separated from the lead rope by a predetermined distance, the lead rope and the cord are at an angle. For this reason, a thrust force is generated in the cord, and the lead rope is pushed out regularly and gets over the groove of the guide roller. The core wire itself is pitch-fed with the spiral winding and the guide of the groove of the guide roll, with the winding being performed for each rotation.
[0009]
According to a second aspect of the present invention, in the first aspect, the groove of the guide roller is a V-shaped groove for sandwiching the core cord so as to be exposed outward, and the guide roller is connected to the mold roll. Are arranged close to the entrance side and exit side of the cord.
According to this, even if there is a slight difference in the diameter of the cord, the centering is performed accurately. The contact of the cord is also minimized, and the cord is protected.
[0010]
According to a third aspect of the present invention, in the first or second aspect, the mold roll is a flat roll.
According to this, since the mold roll does not have the tooth form, the tension of the cord is stabilized. Further, a flat belt sleeve can be formed.
[0011]
According to a fourth aspect of the present invention, the core cord is wound around a mold roll for spirally winding the core cord at a predetermined pitch between a pair of mold rolls arranged in parallel at a predetermined interval. An apparatus, a guide roller that is disposed in parallel between the mold rolls, and has a groove at a predetermined pitch interval, and a groove through which the cord is guided,
A lead rope formed of a monofilament having substantially the same diameter as the core wire cord, being wound around the circumference of the pair of mold rolls,
A guide pulley that supplies a core cord connected to the lead rope to a reference position on the mold roll, and a reference position separated from the lead rope by a predetermined distance axially rearward of the mold roll; ,
The mold roller is rotated, and each time the lead rope makes a circuit between the pair of mold rollers, the core wire cord is pushed out and moved in the axial direction of the mold roll by the predetermined pitch interval, A roll rotating means for arranging the core cord at a predetermined pitch from one end side to the other end side in the axial direction of the die roll, a core cord winding device around the die roll.
[0012]
Without rotating the lead rope, the subsequent cord pushes out the lead rope, ensuring that the lead rope gets over the groove of the guide roller, the cord is guided by its own spiral into the groove of the guide roller, It unfolds in the width direction with the alignment state.
[0013]
According to a fifth aspect of the present invention, in the fourth aspect, the groove of the guide roller is a V-shaped groove that clamps the core wire so as to expose the core wire outward, and the guide roller is the die roll. The cord is disposed close to the entrance and exit sides of the cord.
According to this, even if there is a slight difference in the diameter of the cord, the centering is performed accurately. Minimal contact with core cords and protects core cords
[0014]
According to a sixth aspect of the present invention, in the fourth or fifth aspect, the mold roll is a flat roll.
According to this, since the mold roll does not have the tooth form, the tension of the cord is stabilized. Further, a flat belt sleeve can be formed.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing a main part of a core cord winding device a. The cord cord winding device a is configured as a transmission belt manufacturing device A. The transmission belt manufacturing apparatus A is controlled by operating the operation panel 6 shown in FIG.
[0016]
As shown in FIG. 1, a core cord winding device a is arranged in parallel with a pair of mold rolls 1 and 2, and a guide roller having a groove on which the core cord 3 can ride. 101, 102, 103, and 104, a lead rope 120 wound around the mold rolls 1 and 2 and made of a monofilament having substantially the same diameter as the core cord 3, and a core connected to the lead rope 120. A guide pulley 11 configured to supply the code 3 to a reference position on one of the mold rolls 1 and to a reference position separated by a predetermined distance L behind the mold roll 1 in the axial direction.
[0017]
The first mold roll 1 and the second mold roll 2 are rotatable cylindrical bodies (flat rolls) having the same diameter and the same length as each other, and are driven and rotated by the first and second main electric motors M1 and M2, respectively. It is free. These two main electric motors M1 and M2 move the first mold roll 1 and the second mold roll 2 in the same direction (direction indicated by an arrow) and mutually by the function of the control device 7 shown in FIG. Roll rotation means a1 for driving and rotating at the same rotation speed is configured.
[0018]
Guide rollers 101, 102, 103, and 104, which are provided between the mold rolls 1 and 2 and have grooves 111 at a predetermined pitch P, apply the cord 3 to the mold rolls 1 and 2 at a predetermined pitch in the axial direction. And the leading lead rope 120 has a function of being pitched in the axial direction over the groove 111. The guide roller 101 is disposed on the entry side of the core cord 3 with respect to the mold roll 1, and the guide roller 102 is disposed on the entry side of the core cord 3 with respect to the mold roll 2. The guide roller 103 is disposed on the exit side of the core cord 3 with respect to the mold roll 1, and the guide roller 104 is disposed on the exit side of the core cord 3 with respect to the mold roll 3.
[0019]
As shown in FIG. 2, the surfaces of the guide rollers 101, 102, 103, and 104 have V grooves 111 whose slopes face each other in a V-shape and are arranged in parallel at a predetermined pitch P. The predetermined pitch P is in a range that is 1.1 to 1.3 times the diameter d of the cord 3. The V-groove 111 aligns the cord 3 relatively densely. The top corner of the V-shaped groove 111 is formed in a round shape. The bottom surface of the V groove 111 is also formed in a round shape. Further, the angle β formed by the opposing slopes of the V-shaped groove 111 is preferably in an acute angle range of 30 to 50 °. The angle β is preferably 35 ° or 45 °, and particularly preferably 35 °, in order to hold the cord 3 on the slope of the V-shaped groove 111 in a running state. The size of the V-shaped groove 111 is such that the cord 3 is exposed to the outside. The distance α between the center of the cord 3 and the top of the V-shaped groove 111 is preferably within ± 15% of the diameter d of the cord 3. In particular, it is preferable that the distance α exceeds zero, which is within + 15% of the diameter d of the cord 3, and that the center of the cord 3 be raised above the top of the V-shaped groove 111. With the V-shaped groove 111 as described above, the joint of the lead rope 120, particularly the joint 121, almost protrudes from the V-shaped groove 111. The lead rope 120 gets over the V-groove 111 with the joint 121 as a starting point. Further, the cord 3 is reliably guided by the V-shaped groove 111.
[0020]
As shown in FIG. 3, the guide rollers 101, 102, 103, 104 are provided close to the entrance and exit sides of the mold rolls 1, 2 and push up or down the cord 3. Position. The degree (γ) of pushing up or pushing down the cord 3 is preferably about 1.5 to 3.5 times the diameter d of the cord 3. If this γ is too large, it becomes difficult for the lead rope 120 to climb over the V-groove 111, and if this γ is too small, the lead rope 120 is weakly held at the pitch center of the V-groove 111. The guide rollers 101, 102, 103, and 104 are rotatably held at fixed positions parallel to the mold rolls 1 and 2.
[0021]
The lead rope 120 is a position corresponding to the start of winding of the mold rolls 1 and 2 in the axial direction, is wound around the mold rolls 1 and 2 around the circumference, and is connected by a joint 121. The joint 121 is formed by abutting or aligning the ends of the lead rope 120 and further connecting the ends of the cord 3 along the ends thereof. The butt connection portion or the aligned connection portion between the ends of the lead rope 120 may be different from the juxtaposed connection portion of the cord 3. Further, it is preferable to use a crimp terminal for crushing the sheath tube as the joint 121 used for these connections. As the lead rope 120, a monofilament having substantially the same diameter as the cord 3 is used. The monofilament has a single cross section as a whole. The monofilament does not rotate even under tension, like a stranded wire.
[0022]
The cord 3 connected to the lead rope 120 is a stranded wire such as a PET rope or an aramid rope, and is supplied between the mold rolls 1 and 2 via the guide pulley 11. The guide pulley 11 presses the core cord 3 fed from a core cord roll (not shown) onto one of the mold rolls 1 or a reference position close to the mold roll 1, and the position where the lead rope 120 is wound. Is supplied to a reference position separated by a predetermined distance L from. This predetermined distance L is preferably 20 times or more and 70 times or less with respect to the diameter d of the cord 3. The guide pulley 11 is pivotally supported at the tip of a swing arm 16 that can swing toward the mold roll 1. The swing arm 16 is pivotally supported at a fulcrum p on the movable base 10.
[0023]
The guide pulley 11 is installed at a predetermined position in the axial direction of the first die roll 1. For accurate installation at this predetermined position, the guide pulley 11 is provided so as to be reciprocally movable in the axial direction of the first die roll 1. The reciprocating mechanism is configured such that a pair of guide rails 12, a screw shaft 13 disposed therebetween, and a first screw feed mechanism 15 by a first drive motor 14 thereof move the X-axis relative to the frame 9. The moving table 10 is configured to be driven reciprocally in the axial direction. With this reciprocating mechanism, the guide pulley 11 can perform controlled sliding movement along the axial direction of the first mold roll 1. The guide pulley 11 is brought into a state of approaching a predetermined position on the outer periphery of the first mold roll 1 or a state of being pressed and urged. The fed cord 3 is supplied between the rotating first and second mold rolls 1 and 2 via the guide pulley 11.
[0024]
The roll rotating means a1 for the main electric motors M1 and M2 in FIG. 1 and the control device 7 in FIG. 5 move the first mold roll 1 and the second mold roll 2 in the same direction (direction indicated by an arrow). And driven to rotate at the same rotational speed. Thus, the roll rotating means a1 pushes the lead rope 120 in the axial direction of the mold rolls 1 and 2 by a predetermined pitch P every time the core wire 3 makes a round between the pair of mold rollers 1 and 2. And has a function of aligning the cord 3 at a predetermined pitch P from one axial end of the mold rolls 1 and 2 to the other end.
[0025]
A core cord winding process performed by the core cord winding device a will be described. FIG. 4 is a perspective view of the initial state of the winding of the cord 3 viewed obliquely.
[0026]
First, as a preparation step, a lead rope 120 is wound around one circumference between the mold rolls 1 and 2, and the cord 3 is connected to the lead rope 120 by a joint 121. That is, the lead rope 120 is wound around the one end in the axial direction between the mold rolls 1 and 2, and is fixed by the joint 121. As the lead rope 120, a monofilament having substantially the same diameter as the cord 3 is used. The tip of the stranded wire cord 3 is connected to an appropriate position of the lead rope 120 by a joint 121. In the illustrated example, the connection of the lead rope 120 and the connection of the cord 3 are at the same place, but they may be separate.
[0027]
The guide pulley 11 is brought close to or pressed against the surface of the mold roller 1 so as to guide the cord 3 connected to the lead rope 120. The position of the guide pulley 11 is a reference position separated from the lead rope 120 by a predetermined distance L. On the other hand, the V-groove 111 of the guide rollers 101, 102, 103, and 104 guides the cord 3 wound around the lead rope 120 at a predetermined pitch P.
[0028]
Next, the mold rollers 1 and 2 are driven to rotate. As the lead rope 120 rotates, the cord 3 is fed from the guide pulley 11. At this time, tension acts on the cord 3 and the cord 3 tries to rotate, but the cord 3 is attached to the lead rope 120 by the guide pulley 11 which is separated by a predetermined distance L at the beginning of winding. Maintain alignment without wrapping. That is, at the beginning of the spiral winding of the core cord 3, if the aligned state of the front end portion of the winding is secured, the subsequent core cords 3 are sequentially wound at a predetermined pitch P.
[0029]
The core cord 3 at the beginning of winding is dammed by the lead rope 120. As a result, the cords 3 are arranged in order before the lead rope 120. When the core cord 3 is wound several times, the cord cord 3 acts to push the lead rope 120 in the axial direction of the mold rolls 1 and 2. If this pushing force exceeds the holding force of the lead rope 120 by the V groove 111 of the guide rollers 101, 102, 103, 104, the lead rope 120 is pitched over the V groove 111. On the other hand, the cord 3 is guided in order into the V-shaped groove 111 by its own spiral shape. By repeating the above, the axial state of the aligned state guided by the V-groove 111 of the cord 3 is ensured.
[0030]
As described above, the lead rope 120 initially wound between the mold rolls 1 and 2 is guided so that its arrangement state can get over the V-groove 111 of the guide rollers 101, 102, 103 and 104, so that the core is The line code 3 is kept aligned. Then, the aligned core cords 3 spread from one axial end of the mold rollers 1 and 2 to the other end.
[0031]
The effects of the winding method and the winding device of the above-described embodiment will be described below.
(1) First, a monofilament lead rope 120 is wound between the mold rolls 1 and 2 and a predetermined interval is provided between the lead rope 120 and the touch pulley, so that the lead rope 120 and the core cord 3 have a certain angle. Eggplant Due to this angle, a component force of tension is generated in the cord 3, the lead rope 120 is pushed out regularly, and alignment of the cord 3 is ensured. Therefore, the guide rollers 101, 102, 103, and 104 having the V-groove through which the lead rope 120 can get over need only be arranged in parallel with the mold rolls 1 and 2. Due to the parallel arrangement of the guide rollers 101, 102, 103 and 104, the alignment of the cords 3 is maintained with high accuracy. The fine adjustment of the intersecting arrangement is unnecessary as in the case where the guide rollers are arranged so as to intersect the mold rolls 1 and 2 and the lead rope is sent out at the intersecting angle in the axial direction. Further, since the monofilament lead rope 120 does not rotate even when tension is applied, the cords 3 connected to the lead rope 120 can maintain a parallel state.
[0032]
(2) The guide rollers 101, 102, 103, and 104 are V-grooves on which the cord 3 rides. Therefore, it is easy to get over the lead rope 120. Further, since there is no partition between the V-grooves, it is possible to cope with a cord in which the cords 3 are densely arranged. Also, since the core cord 3 is inevitably centered by the V-groove, it is possible to ensure a highly accurate alignment state of the core cord 3.
[0033]
(3) Since the cord 3 spreads over the mold rolls 1 and 2 in an aligned state, the mold rolls 1 and 2 can be flat rolls without teeth. For this reason, by flattening the unvulcanized sheet inside and outside the core cord 3 by using a flat roll, it is possible to manufacture various types of belts (W / D belt, rib belt, timing belt, etc.) in a stage before forming the tooth profile. Can respond. In addition, since the mold rolls 1 and 2 can be flat rolls, the same mold rolls 1 and 2 can be used until the cutting step, for example, by using a urethane roll for the surface.
[0034]
The winding method and the winding device according to the above-described embodiment can be modified and implemented as follows.
(1) The mold rolls 1 and 2 are not limited to flat rolls, but may be circumferentially toothed rolls. Also in this case, it is possible to improve the alignment of the cords.
[0035]
(2) Of the guide rollers 101, 102, 103 and 104, the guide rollers 103 and 104 on the exit side of the mold rolls 1 and 2 can be omitted. The alignment state of the cord 3 can be maintained only by the guide rollers 101 and 102 on the entry side of the mold rolls 1 and 2. The groove 111 of the guide rollers 101, 102, 103, 104 is preferably a V-shaped groove, but may be a U-shaped groove or a trapezoidal groove as long as the center cord 3 has an operation capable of holding the core cord 3 in a riding shape.
[0036]
As shown by a two-dot chain line in FIG. 1, the cord 3 guided by the guide pulley 11 may be arranged so as to be guided by the guide roller 101 after passing through one mold roll 1.
[0037]
The above-described core cord winding device is incorporated as a part of a transmission belt manufacturing device. This transmission belt manufacturing apparatus A will be described with reference to FIG.
The power transmission belt manufacturing apparatus A includes a first supply unit b (see FIG. 6) for winding the upper core rubber sheet 4 between the pair of rolls 1 and 2, in addition to the configuration of the core cord winding apparatus a described above. A second supply means c (see FIG. 7) for winding the V-core rubber belt 5 between the rolls 1 and 2 and an adjusting mechanism d for freely moving the second mold roll 2 toward and away from the main roll 1 and maintaining the lock. 1), and a cutting means g (see FIG. 8) for cutting the belt body ve formed between the pair of rolls 1 and 2 into a small width.
[0038]
The first supply means b includes an unvulcanized upper core rubber sheet (first sheet member) between the core wire 3 wound between the pair of mold rolls 1 and 2 and the first mold roll 1. 6), and guides the upper core rubber sheet roll 18 and the upper core rubber sheet 4 fed out to the lower end of the first mold roll 1 as shown in FIG. For this purpose, a rotatable inclined supply roller 19 is disposed between the pair of mold rolls 1 and 2 at an angle of 45 degrees.
[0039]
That is, the upper core rubber sheet 4 unwound from the upper core rubber sheet roll 18 is turned by 90 degrees by the inclined supply roller 19, and the lower side of the strip-shaped core cord 3 having an already-formed oblong diameter in side view is formed. When the sheet leading end portion 4a is placed on the portion 3a, the upper core rubber sheet 4 is moved in the direction of the first die roll 1 by being dragged by the core wire cord 3 being driven to rotate. Then, as shown in FIGS. 6 (b) and 6 (c), the sheet is pulled in with the sheet leading end 4a being sandwiched between the bottom of the first mold roll 1 and the core cord lower part 3a. Thus, the wire is wound between the first mold roll 1 and the second mold roll 2 inside the cord 3.
[0040]
Incidentally, the upper core rubber sheet 4 is cut in advance into a length just wound once between the first mold roll 1 and the second mold roll 2 inside the cord 3, and is rotated once. In this case, the sheet ends 4a are set so as to abut each other. Note that the inclined supply roller 19 may be configured to be a driving rotary type using a driving unit such as an electric motor.
[0041]
The second supply means c supplies an unvulcanized V-core rubber sheet (an example of a second sheet member) 5 to the outer peripheral side of the core cord 3 in which the upper core rubber sheet 4 is wound inside. As shown in FIG. 7, a V-core rubber sheet roll 20 and a pressing roller 17 pressed against the first die roll 1 from outside in the radial direction of the first die roll 1 are constituted. Have been.
[0042]
The press roller 17 is rotatably supported by the distal end of a telescopic rod 21 a of a downward electric cylinder 21 supported on an upper portion 9 a of the frame 9. The telescopic operation of the electric cylinder 21 allows the press roller 17 to move vertically. And the pressing force can be set freely. As shown in FIG. 7, as shown in FIG. 7, the leading end portion 5 a of the V-core rubber sheet 5 unwound from the V-core rubber sheet roll 20 is used as a core cord of a portion wound around the first mold roll 1. 3 between the first mold roll 1 and the second mold roll 2 outside of the cord 3 by being supplied between the press roller 3 and the pressing roller 17. It is turned.
[0043]
The V-core rubber sheet 5 shown in FIG. 7 is cut in advance into a length just wound once between the first mold roll 1 and the second mold roll 2 outside the cord 3. It is set so that the tip portions 5a, 5a contact each other after one rotation. As means for moving the pressing roller 17 in and out of the first mold roll 1, various types such as a hydraulic cylinder using hydraulic pressure or air, or a mechanism that can be moved in and out by swinging are possible in addition to the electric cylinder 21. It is.
[0044]
The adjusting mechanism d rotatably supports the second mold roll 2 and moves the moving tower 22 that supports the second electric motor M2 that belt-drives the second mold roll 2 in a direction perpendicular to the axis (Y-axis direction). It is configured such that it can slide freely. That is, the movable tower 22 is slidably supported by the rail mechanism 23, and the movable tower 22 slides by rotating and driving the screw shaft 24 engaged with the lower part of the movable tower 22 by the second motor 25. Thereby, the center distance wb (see FIG. 1) between the first mold roll 1 and the second mold roll 2 can be adjusted. Therefore, by operating the adjustment mechanism d, the second mold roll 2 can be moved and adjusted in the Y-axis direction so as to match the circumference of the transmission belt B to be created.
[0045]
The cutting means g for cutting the belt body ve formed between the pair of rolls 1 and 2 into small widths is provided using the cord cord alignment supply means a. That is, as shown in FIG. 1, the cutting means g includes a rotary blade 29, a third drive motor 30 for driving and rotating the rotary blade 29 by belt transmission, and an intermediate portion for mounting and supporting the rotary blade 29 and the third drive motor 30. A table 31 and a second screw feed mechanism 32 for driving and sliding the intermediate table 31 with respect to the movable table 10 in the Y-axis direction are provided.
[0046]
The second screw feed mechanism 32 includes a pair of guide rails 33, 33, a screw shaft 34 extending therebetween in the Y-axis direction, and a fourth drive motor 35 for driving and rotating the screw shaft 34. By the forward / reverse drive of the fourth drive motor 35, the intermediate table 31, ie, the cutting means g, can be moved in the Y-axis direction with respect to the movable table 10. As a result, the cutting means g is moved to a retracted position sufficiently far from the first mold roll 1 when not in use, and is moved in a direction approaching the first mold roll 1 when necessary, as shown in FIG. Then, it is moved to an operation position where only the belt body ve can be cut.
[0047]
Next, a process of manufacturing a wrapped V-belt by the transmission belt manufacturing apparatus AA will be described.
{Circle around (1)} The adjusting mechanism d is operated to move the position of the second mold roll 2 to perform an inter-axis distance setting step of setting the inter-axis distance wb with the first mold roll 1 to a desired value.
[0048]
{Circle around (2)} A core cord winding step of spirally winding the core cord 3 between the first die roll 1 and the second die roll 2 using the core cord winding device a. (See FIGS. 3 and 4).
[0049]
(3) The upper core rubber sheet 4 is drawn between the strip-shaped core cord 3 and the first mold roll 1 using the first supply means b, and the first mold roll 1 and the second mold A first sheet supply step of winding the upper core rubber sheet 4 between the roll 2 and the roll 2 is performed (see FIG. 6). The upper core rubber sheet 4 is made to make one round, bevel cut, butt overlapped and joined. The manner of such a joint is well known, and the illustration is omitted.
[0050]
{Circle around (4)} Using the second supply means c, the V-core rubber sheet 5 is overlapped on the outer peripheral side of the strip-shaped cord 3 so that the first mold roll 1 and the second mold roll 2 A second sheet supply step of winding is performed (see FIG. 7). As in the case of the upper core rubber sheet 4, the V-core rubber sheet 5 is caused to make one round, bevel-cut, butt overlapped and joined. Upon completion of the second sheet supply step, an unvulcanized belt body ve is formed with a predetermined width by three layers of the upper core rubber sheet 4, the core wire cord 3, and the V core rubber sheet 5.
[0051]
{Circle around (5)} The wide belt body ve is sequentially cut from the end in the X-axis direction by using the cutting means g, and a belt dividing step of forming a plurality of small split belts vc with a predetermined width is performed (see FIG. 8). The plurality of divided split belts vc are detached from the pair of rolls 1 and 2, suspended on a work-in-progress cart, and carried out to a workplace where a next skive process is performed.
[0052]
{Circle around (6)} As shown in FIG. 9, in the skive process, the V core rubber sheet 5 in the split belt vc whose inside and outside are reversed is cut into a V-shaped cross section. Then, the rubber body cover G is covered in the covering step. After these steps, the process proceeds to the vulcanization step, and the wrapped V-belt is completed. The covering step is a step of covering the unvulcanized split belt vc having a V-shaped cross section with a rubber outer skin. The vulcanization step includes pot vulcanization and press vulcanization.
[0053]
[Another embodiment]
<< 1 >> After the core cord winding step of spirally winding the core cord 3 between the first mold roll 1 and the second mold roll 2, first, on the outer peripheral side of the core cord 3. A second sheet supply step of winding the V core rubber sheet 5 is performed, and then a first sheet supply step of drawing and winding the upper core rubber sheet 4 between the cord 3 and each of the rolls 1 and 2 is performed. You may do it.
[0054]
<< 2 >> As the power transmission belt manufacturing method according to the present invention and the power transmission belt B manufactured by the manufacturing apparatus A, various types such as a timing belt, a low edge belt, and a ribbed belt can be used.
[0055]
【The invention's effect】
As described above, according to the core cord winding method and apparatus according to the present invention, the guide roller is disposed in parallel with the mold roll, and no force for bending the core cord is generated, There is an effect that the alignment of the cords is ensured. In addition, there is an effect that the fine adjustment of arranging the guide rollers crossing the die roll and adjusting the angle of the crossing arrangement becomes unnecessary. Further, when the mold roller is flat, the pitch of the cord can be changed only by replacing the guide roller.
[0056]
According to the configuration of the second and fifth aspects, since the groove of the guide roller is a V groove, the core cord is guided at the pitch center of the groove, and the alignment state of the core cord by the guide roller is reliably maintained. To play.
[0057]
According to the configuration of claims 3 and 6, since the mold roll is flat, it is possible to form a belt sleeve having no tooth mold, and the width of the belt sleeve is cut while being hung on the mold roll. The effect is that it can be performed.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a main part of a core cord winding device.
FIG. 2 is a diagram showing a cross section of a groove of a guide roller.
FIG. 3 is a side view showing an arrangement state of a guide roller.
FIG. 4 is a side view showing a winding state of the cord.
FIG. 5 is a device layout of the cord winding device.
FIGS. 6A and 6B are plan views showing a first sheet supply step, and FIGS. 6B and 6C are views showing an operation in which the upper core rubber sheet is drawn between the main roll and the cord. FIG.
FIGS. 7A and 7B show a second sheet supply step, wherein FIG. 7A is a plan view and FIG.
FIG. 8 is a plan view showing a belt cutting step.
FIG. 9 is an operation diagram showing a finishing process of the small split belt.
[Explanation of symbols]
1,2 mold roll
3 core cord
11 Guide pulley
101, 102, 103, 104 Guide rollers
111 V groove (groove)
120 lead rope
121 joint
a core cord winding device
b First supply means
c Second supply means
ve belt body
vc split belt

Claims (6)

A core cord winding method of spirally winding a core cord at a predetermined pitch between a pair of mold rolls arranged in parallel with each other at a predetermined interval,
Between the mold rolls, a guide roller having a groove at a predetermined pitch interval and having a groove through which the cord is guided is arranged in parallel with the mold roll,
Around a circumference between the pair of mold rolls, a lead rope made of a monofilament having substantially the same diameter as the cord is wound.
A core cord is connected to the lead rope, and the core cord is supplied to a reference position on the die roll, which is separated from the lead rope by a predetermined distance axially rearward of the die roll. And
Rotating the mold roll, each time the core wire makes a round between the pair of mold rollers, extrudes the lead rope in the axial direction of the mold roll by the predetermined pitch interval, and moves the lead rope.
A method of winding a core cord around a die roll, wherein the core cord is aligned at a predetermined pitch from one end side to the other end side in the axial direction of the die roll. The groove of the guide roller is a V-groove that clamps the core wire so as to be exposed outward, and the guide roller approaches the entrance side and the exit side of the core cord to the mold roll. 2. The method according to claim 1, wherein the core cord is wound around the die roll. The method according to claim 1, wherein the mold roll is a flat roll. An apparatus for winding a core cord around a mold roll that spirally winds a core cord at a predetermined pitch between a pair of mold rolls arranged in parallel with each other at a predetermined interval,
A guide roller that is arranged in parallel between the mold rolls and has a groove at a predetermined pitch interval, and has a groove through which the cord is guided,
A lead rope formed of a monofilament having substantially the same diameter as the core wire cord, being wound around the circumference of the pair of mold rolls,
A guide pulley that supplies a core cord connected to the lead rope to a reference position on the mold roll, and a reference position separated from the lead rope by a predetermined distance axially rearward of the mold roll; ,
The mold roller is rotated, and each time the core wire makes a circuit between the pair of mold rollers, the lead rope is pushed out and moved in the axial direction of the mold roll by the predetermined pitch interval, A roll rotating means for arranging the core cord at a predetermined pitch from one end side to the other end side in the axial direction of the die roll, a core cord winding device around the die roll. The groove of the guide roller is a V-groove for holding the core cord so as to be exposed outward, and the guide roller approaches the entrance side and the exit side of the core cord to the mold roll. The apparatus for winding a core cord around a mold roll according to claim 4, wherein the core cord is wound around the mold roll. The apparatus according to claim 4 or 5, wherein the mold roll is a flat roll.

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