JP2005053085A - Ribbon winding apparatus for manufacturing pneumatic tire and ribbon winding method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the irregularity of the feed speed of a ribbon 51 to the feed-out part toward a molding drum 5 even at the time of high speed operation or the occurrence of the problem caused thereby, in an apparatus for winding the ribbon 51 around a molding drum 5 for manufacturing a pneumatic tire or the member thereof, and a ribbon winding method using it. <P>SOLUTION: An encoder 14A for measuring the feed speed of the ribbon 51 is provided in the feed-out part 1 for feeding out the ribbon 51 toward the molding drum 5. Further, an ecoder device 71 for measuring the position of a dancer roller 21 is provided to the dancer device 2 provided between the feed part 3 of the ribbon 51 and the feed-out part 1. Then, the control of driving for drawing out the ribbon 51 to the feed-out part 1 from a ribbon roll 55 installed rearward is optimized on the basis of the measurement of the encoder device. A belt conveyor device 31 is used in the drawing-out of the ribbon 51 to draw out the ribbon 51 so as to wind the ribbon 51 around the conveyor surface 81a of the belt conveyor device 31 to train the ribbon over the belt conveyor device 31. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an apparatus and a method for winding a reinforcing cord or other ribbon (strip-like member) around a molding drum or the like in order to manufacture a tire or a spiral cap ply and other members constituting the tire.

  For example, a radial tire, which is currently the mainstream of pneumatic tires, has one or more carcass plies spanned between both bead portions as a reinforcing cord member, and a tread rubber. A belt ply or the like disposed between them is included (for example, Patent Document 1). The belt ply is a rubber sheet reinforced with a steel cord or the like.

  In the radial tire molding process, when it is necessary to improve high-speed durability, etc., a reinforcing cord is provided along the tire circumferential direction between the belt ply and the tread rubber (cap tread) covering the belt ply. A ribbon coated with rubber is wound (Patent Document 1). In other words, the reinforcing cord made of organic fiber such as 66 nylon or steel filament prevents the tire from being excessively deformed by centrifugal force or the like during high-speed running.

  The ribbon is wound around the entire surface of the tread or around both ends of the tread in a spiral shape or a splice (both ends joining ring) to form a belt cover ply. When wound in a spiral shape, it is also called a spiral cap ply.

  In order to form a belt cover ply, it is necessary to wind a ribbon around a predetermined position of a molding drum of a tire at a predetermined pitch, and studies have been made on a winding device for that purpose (for example, Patent Documents 2 to 3). . In addition, production of a belt ply and other tire members by a method of winding a ribbon around a forming drum has been studied (for example, Patent Document 4).

  The ribbon is supplied from a supply device to a predetermined position on the drum surface through a guide roller and the like, and every time winding at a predetermined position is completed, cutting is performed by a cutting device at a position between the feeding member and the forming drum. (Patent Document 2). The ribbon supply and the rotation of the forming drum are repeated when the ribbon is cut and then restarted.

  The ribbon supply device is generally equipped with a drive device that is loaded with a ribbon roll around which a ribbon is wound and pulls out the ribbon. The ribbon coming out of the ribbon roll passes through a guide roller, etc., and is wound around a driving roller connected to the motor so as to wrap around a half circumference, and is fed to the side of the feeding member close to the forming drum by driving the motor. (Patent Documents 2 to 3).

  In this way, when pulling out and supplying the ribbon, it has been attempted to install a rotary encoder for detecting the ribbon drawing speed downstream of the drawing driving drive roller (Patent Document 3). Here, feedback control for adjusting the rotation speed of the drive roller, that is, the rotation speed of the motor connected to the drive roller based on the detection of the drawing speed has also been proposed.

  However, in recent years, as the ribbon winding apparatus is operated at high speed, and the ribbon winding speed and the drawing speed are significantly increased, the ribbon supply speed varies when the ribbon is supplied to the feeding portion to the forming drum. It was a problem. When the supply speed of the ribbon deviates from a predetermined winding speed according to the rotation speed of the forming drum, there has been a problem that the ribbon is slackened or excessively tensioned, and adjustment for that is troublesome.

In particular, in recent years, ribbons with a very narrow width of 10 mm or less have been used, but in such cases, the “strain” (stiffness due to elasticity) of the ribbon is reduced. . Therefore, problems associated with variations in the ribbon supply speed during high-speed operation are more likely to occur.
JP-A-6-24208 Japanese Patent Laid-Open No. 4-320832 JP 2002-127269 A JP 2001-252992 A

  The present invention has been made in view of the above problems, and in an apparatus and a method for winding a ribbon on a forming drum for manufacturing a pneumatic tire or a member thereof, the ribbon for the feeding portion to the forming drum even at high speed operation The present invention intends to provide a device that can prevent fluctuations in the supply speed or problems associated therewith.

  A ribbon winding device of the present invention is a device for winding a ribbon on a forming drum for manufacturing a pneumatic tire or a member thereof, a feeding unit arranged in the vicinity of the forming drum and sending out the ribbon, and a ribbon A ribbon supply source for storing or continuously forming the ribbon, a pull-out drive unit for pulling out the ribbon from the ribbon supply source to the delivery unit at a predetermined speed, and a ribbon fed from the ribbon supply source to the delivery unit In a ribbon winding apparatus comprising a first measuring means for measuring the supply speed of the ribbon, a fluctuation in the supply amount from the ribbon supply source with respect to the feed amount from the delivery section between the ribbon supply source and the delivery section A dancer device that changes the path length of the ribbon so as to absorb the heat, and the dancer device includes a change amount of the path length or a corresponding change amount. It provided with a second measuring means for measuring the driving of the drawer drive unit comprises a measurement value measured by the first measuring means, characterized in that it is controlled based on the measured value by the second measuring means.

  Preferably, the dancer apparatus comprises a roller for hanging a ribbon, a support member for holding the roller, a flexible belt-like member to which the support member is connected, and a pulley wound with the belt-like member, The second measuring means is an encoder connected to the pulley. In such a case, it is possible to absorb the imbalance of the ribbon supply speed to suppress the fluctuation of the tension and the like, and at the same time, to catch the change of the path length related to the dancer apparatus directly and in a simple and reliable manner.

  In a preferred embodiment, the drawer driving unit is composed of a belt conveyor on which a ribbon is stretched. In such a case, since slipping when the ribbon is pulled out and driven is prevented, the amount of ribbon supply can be controlled with higher accuracy, and higher speed operation can be handled.

  The ribbon winding method of the present invention is a method of winding a ribbon on a forming drum in order to manufacture a pneumatic tire or a member thereof. When the forming drum is stopped, the ribbon is cut and then held by the delivery unit. Attach the tip of the ribbon onto the forming drum, rotate the forming drum, and pull out the ribbon from the ribbon roll around which the ribbon is wound at a speed corresponding to the rotation of the forming drum and supply the ribbon to the delivery unit In the ribbon winding method, the ribbon supply method includes measuring the ribbon supply speed to the delivery unit and controlling the ribbon pulling drive speed based on the measured value. Absorbs the loss of balance between the feed amount from the feed portion and the feed amount from the ribbon supply source. And responsive to change the path length of the ribbon so, the variation of the path length of the ribbon when the continuously measured, is characterized by using the control of the drawer drive.

  The ribbon pull-out drive speed can be optimized with a simple configuration that hardly increases the cost, thereby enabling high-speed operation.

  An embodiment of the present invention will be described with reference to FIGS.

  1 to 3 are a perspective view, a side view, and a top view showing the entire winding apparatus. In FIG. 3, a part of the configuration of the sending unit is omitted. FIG. 4 is a perspective view showing a main part of the dancer apparatus, and FIG. 5 is a perspective view showing a delivery part at the tip of the winding apparatus.

  As shown in FIGS. 1 and 2, the winding device 10 includes a delivery unit 1 that sends out the ribbon 51 to the forming drum 5, a dancer device 2 that adjusts the tension of the ribbon 51 that is sent out, and a ribbon supply unit that supplies the ribbon at a predetermined speed. 3 and a frame 4 that holds these movably in the drum axis direction.

  The frame 4 is a partially opened box or basket (cage) formed by combining a rectangular movable base 41 and a top plate 42 having a smaller area through a vertical column / wall 43. The shelf 44 protrudes further forward (on the molding drum side) from the main body 4a. A relatively small-sized shelf 49 protrudes from the rear end of the frame main body 4a. The top plate 42 of the frame 4 is arranged so as to cover the majority of the right side of the movable base 41 when viewed from the rear (the opposite side of the forming drum). 42 is not covered. The ribbon supply unit 3 is formed in a region extending from the rear shelf 49 of the frame 4 to the main body 4a, the delivery unit 1 is formed in the front half of the front shelf 44, and the ribbon supply unit 3 and the delivery unit 1 In between, a vertically extending dancer device 2 is arranged.

  Below the frame 4, two rails 45 having a convex section extending in the drum axis direction are installed on the floor surface 48, and a projecting portion 41 a having a substantially concave section projecting downward from the movable base 41 is engaged therewith. Slide. A bolt shaft shaft 47 directly connected to the shaft of the servo motor 46 extends between the two rails, and a nut portion 41b protruding downward from the movable base 41 is engaged with the bolt shaft shaft 47. Therefore, the entire frame 4 can be moved in the drum axis direction at a predetermined speed or to a predetermined position by driving the servo motor 46.

  A belt conveyor device 31 is mounted on the top plate 42 of the frame. The belt conveyor device 31 includes a motor 82, a driving roller 83 directly connected to the driving shaft, a driven roller 84, and a rubber belt 81 with teeth (with an indent extending in the width direction) spanned between the rollers 83 and 84. It consists of. As shown in FIG. 3, the motor 82 is disposed on the top plate 42 so as to cover the front portion thereof, and the receiving portion 85 of the driven roller 84 is provided at the rear left end portion of the top plate 42. In addition, the driving and driven rollers 83 and 84 and the rubber belt 81 are disposed at a location protruding from the left end 42 a of the top plate 42. The driving and driven rollers 83 and 84 have the same diameter and the same installation height. Therefore, the upper surface of the rubber belt 81 forms a horizontal plane extending in the front-rear direction.

  A shaft receiving portion 36 is fixed to the upper surface of the shelf 49 at the rear of the frame 4. In the illustrated example, the shaft receiving portion 36 includes two ring portions 36a protruding upward from the left and right end portions of the top surface of the shelf portion 49, and a single base plate 36b that joins the ring portions 36a, and the right end of the base plate 36b. A powder brake 34 is joined to the joint. Further, the shaft receiving portion 36 is at a height position that divides the movable base 41 and the top plate 42 of the frame 4 approximately equally. The initial diameter of the ribbon roll 55 is substantially equal to the distance D2 between the movable base 41 and the top plate 42.

  The shaft 35 of the ribbon roll 55 around which the ribbon 51 is wound in a cylindrical shape extends long from the portion around which the ribbon 51 is wound, and the extended portion 35a is inserted into the shaft receiving portion 36. The tip 35b of the extending part 35a is inserted into the powder brake 34 and fixed. Like a powder clutch, a powder brake is a magnetic coupling and friction of the magnetized and magnetized powder in the gap between the receiving part with a built-in excitation coil and the driven shaft side member. It realizes braking.

  The other end 35c of the shaft 35 slightly protrudes from the portion around which the ribbon 51 is wound, and is supported by a part of the frame 4 (not shown). In this way, the shaft 35 of the ribbon roll 55 is supported from the frame 4 so as to be rotatable and brakeable.

  A horizontal rod protrudes from the rear end of the frame main body 4a above the shaft receiving portion 36 to hold three photoelectric tubes 37-1 to 37-3 (FIG. 2). Correspondingly, a horizontal beam protrudes from the left end of the rear end face of the movable base 41 to hold three mirrors 38-1 to 38-3 (FIG. 2). The combination of the photoelectric tube 37 and the corresponding mirror 38 makes it possible to detect that the ribbon 51 has been fed and the diameter of the ribbon roll 55 has become smaller than a certain value. For example, if the light between the first photoelectric tube 37-1 and the first mirror 38-1 can pass, the diameter of the ribbon roll 55 is reduced to 55 'indicated by a one-dot chain line. Can be detected. Based on such detection, the output of the motor 61 of the conveyor belt device 31 or the strength of braking of the powder brake 34 is adjusted, and the set value is adjusted so that the ribbon 51 is supplied in the optimum state. Done.

  On the upper surface of the movable base 41 of the frame 4, a rod-shaped roller 33 is disposed on the front side so as to extend in the left-right direction (drum axial direction). The outer peripheral surface of the rod-shaped roller 33 is formed so that the diameter gradually increases from both ends toward the center. The ribbon 51 fed out from the lower surface side of the ribbon roll 55 is folded back at the bar roller 33 and supplied obliquely upward toward the rear end portion of the belt conveyor device 31. The position at which the ribbon 51 is fed out from the ribbon roll 55 swings left and right, but due to the bulging shape of the bar-shaped roller 33, the fluctuation of the ribbon path length that is folded back through the bar-shaped roller 33 is absorbed. As shown in FIG. 3, the rod-shaped roller 33 allows the ribbon 51 to be smoothly fed out in a direction perpendicular to the shaft 35, that is, in the front-rear direction of the winding device 10.

  Further, a supply guide roller 32 is disposed between the rod-shaped roller 33 and the driven roller 83 at the rear end of the belt conveyor device 31 in the vicinity of the driven roller 83. The guide roller 32 has such a shape that the top portions of a flat conical disc plate having a diameter larger than that of the driven roller 83 are combined with both side surfaces of a small-diameter roller. The guide roller 32 is suspended from the end surface 42a of the top plate 42 of the frame 4, and is supported through a ball bearing so as to be smoothly rotated at a high speed. Even if the feeding position of the ribbon 51 is swung to the left and right, the supply guide roller 32 prevents the ribbon 51 from being detached by the large diameter guide, and the ribbon 51 is surely and smoothly moved to a position near the center in the width direction of the rubber belt 81. It is intended to be supplied to.

  The ribbon 51 is looped over the rubber belt 81 of the belt conveyor device 31 and sent forward, and then further forward to the delivery unit 1. As shown in FIGS. 1 and 2, the ribbon 51 passes between the pair of upper and lower rollers 21 of the dancer device 2 between the front end of the belt conveyor device 31 and the guide roller 19 at the rear end of the delivery unit 1. , Under a substantially constant force downward. That is, it is stretched around the roller 21 of the dancer device 2 and stretched in a V shape when viewed from the side, but here, the tension of the ribbon 51 is adjusted to be kept constant.

  The dancer apparatus 2 includes a pair of rollers 21 having a support plate 24 to which the rollers 21 are fixed, a timing belt 22 to which the support plate 24 is fixed and suspended, and a pulley 26 (FIG. 2) that spans the timing belt 22. Thus, it is configured to receive a certain upward force from the weight 29 (indicated by a broken line in FIG. 2). In addition, since the support plate 24 is meshed with the vertical rail 23 through the fitting portion, the pair of rollers 21 are dancer rollers that swing only in the vertical direction. In the vertical columnar dancer apparatus 2, a pulley 26 is accommodated in the upper and lower ends covered by the cover 25.

  Further, as shown in FIG. 1, near the upper and lower ends of the rail 23, a safety limiter 27 (stopper) is arranged together with the proximity switch 73 (FIG. 4). Furthermore, the horizontal U-shaped metal fitting 28 is fixed to the driving height of the conveyor device 31 and the shafts of the driven rollers 83 and 84, and when the roller 21 moves upward, the ribbon 51 is It will be hung on this metal fitting 28 and will slide. Therefore, the ribbon 51 is always tightly wound on the toothed rubber belt 81 and is fed forward without slipping between the ribbon 51 and the rubber belt 81.

  As shown in FIG. 4, the upper pulley 26 is provided with an encoder device 71. Specifically, the shaft of the pulley 26 that passes through the bearing 74 is connected to the encoder device 71 via the coupling 75. Therefore, the vertical movement of the support member 24 and the dancer roller 21 is accurately grasped via the timing belt 22 that is stretched around the pulley 26.

  As shown in FIG. 4, the support member 24 is formed of a vertical plate bent at a right angle, and the shafts of a pair of upper and lower dancer rollers 21 are fixed to one flat plate portion 24a. Further, the timing belt 22 is sandwiched and fixed to the other flat plate portion 24b by a pressing plate 76 from the outer surface side. Further, a slide member 77 having a concave cross section that is meshed with the vertical rail 23 is fixed to the inner surface side of the flat plate portion 24b. The groove 77a of the slide member 77 has a cross-sectional shape that widens in the depth direction, and the tip ridge portion of the vertical rail 23 has a cross-sectional shape that widens as the distance from the base increases. Yes. Therefore, when the support member 24 is assembled to the vertical rail 23, the groove 77 a of the slide member 77 is pressed from one end of the vertical rail 23 so as to grab the tip ridge portion of the vertical rail 23.

  Further, the timing belt 22 is inserted into the hollow portion of the square cylindrical column 72 to which the vertical rail 23 is fixed, and the weight 29 is fixed to a part thereof. In the illustrated example, the weight 29 is a combination of two rectangular parallelepiped members with screws so as to sandwich the timing belt.

  On the other hand, as shown in FIGS. 1 and 2, when the ribbon 51 abuts on the conveyor surface (a belt conveyor in a narrow sense) 81 a of the belt conveyor device 31 and receives feed driving, the feeding movement direction of the ribbon 51 is 180. It has changed more than °. In the illustrated example, the direction of the ribbon 51 exiting the supply guide roller 32 toward the conveyor surface 81a and the direction of the ribbon 51 exiting the conveyor surface 81a toward the roller 21 of the dancer device are approximately 200 degrees. There is no. In this way, the ribbon 51 is stretched over the conveyor surface 81 a, whereby the ribbon 51 is pressed against the rubber belt 81 with a force close to the tension of the ribbon 51 in a region that is more than half of the total length of the rubber belt 81. Therefore, since the ribbon 51 receives sufficient friction with the rubber belt 81, slip does not occur between the ribbon 51 and the conveyor surface 81a even when the ribbon 51 is pulled out at a high speed.

  Moreover, the belt conveyor apparatus 31 hardly increases installation space compared with the case where the ribbon 51 is directly wound around one drive roller. As shown in FIG. 2, the belt conveyor device 31 is housed in a region in front of the shaft receiving portion 36 by the frame 4 and protrudes above the upper end of the sending portion 1 or the upper end of the dancer device 2. Absent. The dimensions in the front-rear direction for arranging the belt conveyor device 31 are accommodated within the dimensions in which the ribbon 51 is pulled out from the ribbon roll 55 and folded back by the bar-shaped roller 33. In other words, with the belt conveyor device 31 having a length that hardly increases the dimensions of the winding device, it is possible to perform pull-out driving that sufficiently prevents slipping.

  The motor 82 that drives the belt conveyor device 31 is, for example, an AC or DC servo motor, and is driven by the microcomputer 6 in synchronization with the steady rotation of the forming drum 5. When the driving control of the motor 82 is performed by the microcomputer 6, the feeding speed of the ribbon 51 is measured by the micro encoder 14 </ b> A in the sending unit 1 as described later. Moreover, the change in the height position of the dancer roller 21 is measured by the encoder device 71 in the dancer device 2 described above. Based on these measured values, the microcomputer 6 corrects the feeding speed of the ribbon 51 in the sending unit 1 every moment according to the path length change in the dancer device 2, and the optimum pulling driving speed by the belt conveyor device 31. And the drive control of the motor 82 is performed accordingly.

  By performing such drive control, the ribbon supply speed can be kept at an optimum state, and the ribbon winding apparatus can be operated at high speed without any problem. That is, the drive control of the motor 82 of the belt conveyor device 31 can be optimized simply by providing an encoder device that detects the position of the dancer roller 21, thereby enabling high-speed ribbon winding. .

  A specific example of the dimensional configuration and the operation speed in the winding device 10 is as follows.

  The diameter of the forming drum 5 is about 600 mm, the distance D1 from the drum surface 5a of the forming drum 5 to the rear end of the winding device 10 (the rear end of the ribbon roll 55 in the initial state) is about 1500 mm, and the movable base 41 and the top plate 42 The distance D2 between them and the initial diameter of the ribbon roll 55 are both about 550 mm, the front-rear direction dimension D3 of the frame body 4a and the front-rear direction distance D4 from the axis of the rod-shaped shaft 33 to the axis of the shaft 35 are both. About 500 mm. In such an overall dimensional configuration, the delivery dimension L (dimension in the front-rear direction) of the conveyor surface (a belt conveyor in a narrow sense) 81a is 150 to 600 mm, preferably 200 to 400 mm, for example, about 300 mm. Moreover, the width | variety (left-right direction dimension) of the conveyor surface 81a is 20-100 mm, Preferably it is 40-70 mm, for example, about 50 mm.

  The rotation speed of the forming drum 5 when the ribbon 51 is wound around the forming drum 5 is, for example, 200 rpm or more, and the supply speed of the ribbon 51 at this time is 400 m / min or more. When the ribbon 51 is supplied at such a high speed, the dancer roller 21 generally swings up and down as well. However, the ribbon pull-out drive is controlled by measuring the change in the ribbon path length due to the swing. Therefore, there will be no driving troubles and no labor or time loss for removing them. Further, when the ribbon 51 is driven to be pulled out, a frictional force sufficient to reliably prevent slippage between the ribbon 51 and the rubber belt 81 can be applied by using the belt conveyor having the above-described configuration. .

  On the other hand, when the ribbon 51 is pulled out and the encoder device 71 of the dancer apparatus 2 is omitted, the supply speed of the ribbon 51 needs to be about 300 m / min or less, for example, in order to continue the steady operation. There is.

  In addition, when the ribbon 51 is driven to be pulled out in a state where the ribbon 51 is wound around a single drive roller in place of the belt conveyor device 31, the supply speed of the ribbon 51 is limited to about 200 m / min. If the supply speed exceeds this, the driving roller will sway, and the winding device will generate significant vibration and noise. In order to prevent such vibrations and vibrations, it is necessary to increase the equipment rigidity of the drive roller and the frame 4, which increases the equipment and increases the manufacturing cost. If the shaft of the drive roller is supported on both sides, the increase in equipment rigidity can be avoided considerably, but in this case, the workability when the ribbon roll 55 is replaced and the ribbon 51 is passed is significantly deteriorated. To do.

  Next, a detailed configuration of the sending unit 1 will be described with reference to a schematic perspective view of FIG.

  A small shelf 44 a protrudes further from the left end on the front side (molding drum side) of the shelf portion 44 of the frame 4. In the illustrated example, a metal fitting having an inverted L-shaped cross section is fixed to the side surface of the shelf 44. A vertical holding plate 15 facing in the front-rear direction is disposed above the small shelf 44a. The holding plate 15 is supported in a vicinity of the center of gravity so that the holding plate 15 can swing in a vertical plane by a support shaft 48a facing in the drum axis direction. In the illustrated example, one of the support fittings 48 that support both ends of the support shaft 48 a is fixed to the upper surface of the small shelf 44 a, and the other is fixed to the upper surface of the end portion of the shelf 44.

  The holding plate 15 includes a rectangular base portion 15b that is long to the left and right, and a tip portion 15a that extends obliquely upward from the front to the front. In the example shown in the drawing, a rear end extending portion 15c having a small size is further provided above the rear upper end surface. Near the lower rear end of the holding plate 15, the drive end 16 a of the first air cylinder 16 is coupled via a pin. The first air cylinder 16 is fixed to the side surface of the shelf portion 44 and arranged vertically. During operation, the first air cylinder 16 rotates the holding plate 15 so that the tip end portion 15a approaches the molding drum 5.

  A pair of upper and lower guide rollers 19-1 and 19-2 are supported from the rear end upper portion of the holding plate 15, that is, the rear upper end and the rear end extending portion 15c of the base portion 15b. Further, a pair of guide rollers 14-1 and 14-2 are mounted so as to be obliquely combined at a location where the base portion 15b is transferred to the tip portion 15a. The ribbon 51 is fed substantially horizontally from the rear guide roller 19 to the front guide roller 14 along the upper end of the base portion 15b of the holding plate 15. Of the front guide rollers 14, the upper guide roller 14-1 with which the ribbon 51 actually contacts is provided with a micro-encoder 14A that detects the number of rotations and the rotation position. They are coupled from the opposite side of the holding plate 15.

  One tip roller 12 is rotatably supported at a front tip 15d closest to the forming drum at the tip 15a of the holding plate 15, and includes a tip roller 12, a front guide roller 14, and the like. Between them, a rod-shaped delivery guide 11 having an upward concave groove 11b is arranged. The delivery guide 11 is creased from the distal end portion 15 a of the holding plate 15 via the second air cylinder 17. That is, the fixed end portion of the second air cylinder 17 is fixed to the distal end portion 15 a of the holding plate 15 via the guide / holding member 17 c, and the delivery guide 11 is fixed to the drive end 17 a of the second air cylinder 17. ing. When the second air cylinder 17 operates by receiving the supply of compressed air, the delivery guide 11 is pressed against the tip roller 12.

  A guide projection 11a extending toward the lower end of the tip roller 12 is provided at the tip of the delivery guide 11 in a wedge shape, and the upper surface of the guide guide 11 is smooth from the bottom surface of the concave groove 11b inside the delivery guide 11. It is continuous. As a result, when the ribbon 51 is guided to the molding drum 5 side, the ribbon 51 is smoothly fed out without causing a portion to be caught. Further, when the leading end of the delivery guide 11 is pressed against the leading end roller 12, the ribbon 51 is sandwiched between the guide protrusion 11 a and the peripheral surface of the leading end roller 12.

  A ribbon cutting device 13 is further attached to the holding plate 15. The ribbon cutting device 13 includes a linear arm 13c held so as to be swingable from the vicinity of the upper end of the holding plate 15, a roller 13b coupled to the tip, and a cutter blade attached to the arm 13c in the vicinity thereof. 13a. The arm 13c is coupled to one end of a lever bar 13d on the opposite side of the holding plate 15 via a pin 13e penetrating the vicinity of the upper end of the holding plate 15 near the base, and the other end of the lever bar 13d is The third air cylinder 18 is coupled to the drive end 18a.

  When the third air cylinder 18 fixed to the rear portion of the holding plate 15 is actuated by the supply of compressed air, the arm 13c of the ribbon cutting device 13 swings downward, and the cutter blade 13a is moved in front of the tip roller 12 to the ribbon. 51 is cut. When cutting the ribbon 51, the tip roller 12 and the forming drum 5 are separated so that the cutter blade 13a and the roller 13b of the ribbon cutting device 13 can pass through. That is, the first air cylinder 16 that rotates the holding plate 15 keeps the distal end portion 15a of the holding plate 15 away from the forming drum 5 by setting the compressed air to the released state. At the same time, the second air cylinder 17 is operated to sandwich and fix the ribbon 51 between the delivery guide 11 and the leading end roller 12.

  On the other hand, when the ribbon 51 is wound around the forming drum 5, the first air cylinder 16 is operated in the normal operation mode to bring the tip roller 12 close to the forming drum 5 and the second air cylinder 17 is released. Then, the pinching of the ribbon 51 is released. When starting winding of the ribbon 51 such as after cutting the ribbon 51, first, alignment between the tip of the ribbon 51 and the peripheral surface of the forming drum 5 is performed. Thereafter, compressed air that is slightly higher in pressure than the normal operation mode is temporarily introduced into the first air cylinder 16. As a result, the leading end roller 12 is pressed against the forming drum 5, and the leading end protruding portion 51 a of the ribbon 51 protruding from the sandwiching location 51 b is attached to the forming drum 5.

  A microcomputer 6 for automatically controlling the operation of each part of the ribbon winding device 10 and the rotation operation of the motor 52 of the forming drum 5 is provided in an operator room, for example.

  Hereinafter, the control of the supply speed of the ribbon 51 will be described with reference to the flowchart of FIG.

  After starting the operation program of the microcomputer 6, first, in step a <b> 1, the diameter of the set ribbon roll 55 is determined by the above-described photoelectric tube 37, and based on this, the ribbon 51 is pulled out and the ribbon roll 55 is braked. The set parameters are set.

  In step a <b> 2, it is determined whether or not the leading end of the ribbon 51 at the leading end of the delivery unit 1 has been attached to the drum surface 5 a of the forming drum 5 after position adjustment. Based on this determination, a pasting operation is performed after position adjustment and confirmation in step a10. If the completion of the pasting is confirmed, in step a3, the rotation of the motor 82 of the conveyor device 31 is started to synchronize with the rotation of the forming drum 5.

  In step a4, immediately after the rotation of the molding drum 5 is started, a speed corresponding to the rotation speed of the molding drum 5 is set as the rotation speed of the motor 82.

  In steps a <b> 5 to a <b> 6, the set rotational speed of the motor 82 is corrected based on the measurement value of the microencoder 14 </ b> A and is sequentially corrected based on the measurement value of the encoder device 71. Repeat these very short time intervals.

  If it is determined in step a7 that the predetermined amount of winding has been completed, the process proceeds to step a8, and the driving of the conveyor device 31 is stopped simultaneously with the stop of the rotation of the forming drum 5. At the same time, the powder brake 34 is operated to stop the rotation of the ribbon roll 55 instantaneously.

  In step a <b> 9, the ribbon 51 is cut by the ribbon cutting device 13 after the leading end of the delivery unit 1 is separated from the forming drum 5. Then, it returns to step a1.

  In the above-described embodiment, the height position of the dancer roller 21 has been described as being detected by the encoder device 71 provided in the pulley 26. However, for example, a laser beam distance measuring device may be used. The encoder device 71 may be optical or magnetic. It should be noted that the measurement of the ribbon feeding speed in the feeding unit 1 can also be performed by a method other than the encoder in some cases.

  In the above-described embodiment, the ribbon pull-out driving is described as being performed by the belt conveyor device 31. However, the ribbon 51 may be wound around a driving roller having a sufficient diameter so as to be wound more than half a round. Although the description has been made assuming that the conveyor surface 81a of the belt conveyor device 31 is arranged horizontally, the belt 51 may be inclined as long as sufficient friction is generated between the belt 51 and the rubber belt 81 by the tension of the ribbon 51. . Further, the length direction of the conveyor surface 81 a may be inclined from the front-rear direction of the winding device 10. Furthermore, in some cases, instead of the rubber belt 81, a belt made of stretchable fabric, knitted fabric or the like and having a large friction coefficient with respect to the ribbon can be selected and used.

  Further, the ribbon is not limited to forming a belt cover ply (spiral cap ply) but may be a belt forming a belt ply or the like. Further, the reinforcing cord is not limited to the rubberized cord, and may be only a reinforcing cord, or may be a thin strip member made of resin or rubber that does not have a reinforcing cord in some cases.

It is a typical perspective view which shows the whole ribbon winding apparatus of an Example. It is the whole ribbon winding apparatus of an Example. It is a top view of the ribbon winding apparatus of an Example. A part of the configuration of the sending unit is omitted. It is a typical perspective view which shows the principal part of the dancer apparatus in the ribbon winding apparatus of an Example. It is a perspective view which shows the sending part of the front-end | tip in the ribbon winding apparatus of an Example. It is a flowchart for demonstrating control of the supply speed of a ribbon.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sending part 10 Ribbon winding apparatus 11 Sending guide 12 End roller 13 Ribbon cutting device 15 Holding plate 16-18 First to third air cylinders 2 Dancer device 21 Dancer device guide roller (dancer roller)
DESCRIPTION OF SYMBOLS 22 Timing belt 23 Vertical rail 24 Support member 26 Pulley 27 Stopper 3 Ribbon supply part 31 Belt conveyor apparatus 34 Powder brake 35 Ribbon roll shaft 36 Shaft receiving part 4 Frame 42 Top plate 45 Rail 46 Servo motor 49 Back shelf part 5 Molding Drum 51 Ribbon 55 Ribbon roll 6 Microcomputer 71 Encoder device in dancer device 72 Square cylindrical column 73 Proximity switch 74 Bearing 75 Coupling 81 Toothed rubber belt of belt conveyor device 81a Conveyor surface 82 Motor 83, 84 Drive and driven roller

Claims (4)

An apparatus for winding a ribbon on a forming drum for producing a pneumatic tire or a member thereof,
A feeding section that is arranged in the vicinity of the forming drum and feeds out the ribbon; a ribbon supply source that stores or continuously forms the ribbon; and pulls the ribbon from the ribbon supply source to the feeding section at a predetermined speed In a ribbon winding apparatus comprising: a drawer drive unit for sending; and a first measuring means for measuring a supply speed of a ribbon sent from the ribbon supply source to the sending unit,
A dancer device is provided between the ribbon supply source and the delivery unit to change the path length of the ribbon so as to absorb fluctuations in the supply amount from the ribbon supply source with respect to the delivery amount from the delivery unit. The apparatus is provided with a second measuring means for measuring the amount of change in the path length or the amount of change corresponding thereto,
The ribbon winding apparatus, wherein driving of the pull-out driving unit is controlled based on a measurement value by the first measurement unit and a measurement value by the second measurement unit. The dancer device comprises a roller that hangs a ribbon, a support member that holds the roller, a flexible belt member that is connected to the support member, and a pulley that winds the belt member.
The ribbon winding apparatus according to claim 1, wherein the second measuring means is an encoder connected to the pulley. The ribbon winding apparatus according to claim 1 or 2, wherein the pull-out driving unit is formed of a belt conveyor on which a ribbon is stretched. A method of winding a ribbon on a forming drum to manufacture a pneumatic tire or a member thereof,
When the forming drum is stopped, the ribbon is cut, and the tip of the ribbon held by the delivery unit is pasted on the forming drum.
While rotating the forming drum, the ribbon winding drive is performed by pulling out the ribbon from the ribbon roll around which the ribbon is wound at a speed corresponding to the rotation of the forming drum and supplying the ribbon to the sending unit.
At this time, in the ribbon winding method of measuring the supply speed of the ribbon to the delivery unit and controlling the speed of the ribbon pulling drive based on the measured value,
The path length of the ribbon changes promptly between the ribbon supply source and the delivery unit so as to absorb the loss of balance between the delivery amount from the delivery unit and the supply amount from the ribbon supply source. Let
In this case, the ribbon winding method is characterized in that a change in the path length of the ribbon is continuously measured and used for the pull-out drive control.

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