JP2006175770A - Method and device for feeding and winding narrow strip-shaped body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily impart an arbitrary tensile force to a ribbon-shaped body 14 with a high degree of accuracy, while bringing about laborsaving. <P>SOLUTION: The ribbon-shaped body 14 is wound around a roller 30 which is fixed to a rotating shaft 29 of an induction motor 28, and the output torque of the induction motor 28 is controlled by a control means 42, so that resistance in a direction opposite to a traveling direction can be imparted to the ribbon-shaped body 14 from the roller 30. Since the output torque of the induction motor 28 can be freely controlled by the control means 42, the arbitrary tensile force can be easily imparted to the ribbon-shaped body 14 with a high degree of accuracy in an arbitrary position of a spiral, while the laborsaving is brought about. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

    The present invention relates to a supply winding method and apparatus for spirally winding a narrow band-like body around a body to be wound while surrounding it.

2. Description of the Related Art Conventionally, as a supply winding method and apparatus for spirally winding a wire rod around a bobbin while supplying it to a bobbin, for example, the one described in Patent Document 1 below is known.
Japanese Utility Model Publication No. 2-11420

  This includes a rotating bobbin, a moving wire in the axial direction of the bobbin, and a nozzle that spirally winds the wire around the bobbin, and an upstream side of the bobbin. Tension means installed and capable of applying a predetermined tension to the wire, the tension means being a rotatable tension pulley wound around the wire, and a magnetic disk rotating integrally with the tension pulley; A magnetic pole fixing plate to which a permanent magnet installed opposite to the magnetic disk while maintaining a predetermined distance is attached, a torque adjusting ring screwed into the cover and connected to the magnetic pole fixing plate, and the torque And a dial attached to the adjustment ring.

  In this case, when changing the tension applied to the wire, the torque adjusting ring and the magnetic pole fixing plate are moved in the axial direction with respect to the cover by screw action by manually rotating the dial by a predetermined amount. Thus, the distance between the permanent magnet and the magnetic disk is enlarged or reduced, and the braking force applied to the magnetic disk and the tension pulley is adjusted.

    Here, it is conceivable to use the above-described method / apparatus as it is for the method of supplying and winding a narrow strip as it is, but in this case, the following problems occur. That is, when a narrow band-like body is supplied to a wound body rotating at a constant rotational speed and wound around it in a spiral shape, the outer diameter (winding diameter) of the wound body is at an axial position. If they are different, the winding torque of the narrow strip changes following the change in the outer diameter, and as a result, the tension during winding of the narrow strip varies.

  Here, even when the winding diameter of the wound body is changed as described above, in order to keep the tension at the time of winding the narrow band-like body constant, in general, the width at an arbitrary position of the spiral In order to apply an arbitrary tension to the narrow strip, it may be possible to control the braking force applied to the narrow strip by manually rotating the dial manually. There is a problem that it is necessary to stand by in the vicinity of the supply winding device.

  Further, since the dial is manually rotated when changing the distance between the magnetic disk and the permanent magnet described above, the distance between the magnetic disk and the permanent magnet (the control applied to the tension pulley). It is difficult to adjust the power) with high accuracy, and as a result, there is a problem that it is difficult to adjust the tension of the narrow belt-like body with high accuracy. Moreover, since the braking force applied to the magnetic disk is inversely proportional to the square of the distance between the permanent magnet and the magnetic disk, the amount of change in the braking force greatly varies depending on the position of the magnet even if the permanent magnet moves the same distance, As a result, there is a problem that it is difficult to apply a desired tension to the narrow strip with high accuracy.

  An object of the present invention is to provide a method and an apparatus for winding and feeding a narrow strip that can easily apply an arbitrary tension to the narrow strip with high accuracy while saving labor.

    The first object is to supply the narrow band-shaped body that is traveling to the rotating wound body while moving it in the axial direction of the wound body. Is wound around the wound body in a spiral shape, the narrow band-like body is wound around a roller fixed to the rotating shaft of the electric motor provided on the upstream side of the wound body, and control means By controlling the output torque of the electric motor, a resistance in the direction opposite to the running direction is applied from the roller to the narrow strip, and the tension of the narrow strip between the roller and the wound body is adjusted. Can be achieved by the supply winding method of the narrow band

  Secondly, by supplying the narrow strip running to the rotating wound body while moving it in the axial direction of the wound body, the narrow strip is supplied to the wound body. In a supply and winding device for a narrow strip shaped body wound spirally around, an electric motor in which a roller around which the narrow strip shaped body is wound upstream from the wound body is fixed to a rotating shaft. In addition to providing a resistance in the direction opposite to the running direction from the roller to the narrow strip by controlling the output torque of the electric motor, the tension of the narrow strip between the roller and the wound body is adjusted. This can be achieved by the supply and winding device for narrow strips provided with control means.

  In this invention, the narrow belt-like body is wound around the roller fixed to the rotating shaft of the motor, and the output torque of the motor is controlled by the control means, so that the direction from the roller to the narrow belt-like body is opposite to the traveling direction. However, since the output torque of such an electric motor can be freely controlled by the control means, the narrow belt-like body is formed at an arbitrary position of the spiral while saving labor and reducing the size. Arbitrary tension can be applied. In addition, at this time, the output torque of the electric motor can be easily controlled with high accuracy by the control means, so that the desired tension can be easily applied with high accuracy to the narrow band between the roller and the wound body. Can be granted.

Further, according to the third aspect of the present invention, compared with the case where the output torque of the motor is controlled by changing the input current value or the input voltage value, the tension can be easily and accurately controlled under a low tension. Can be adjusted.
Furthermore, if it comprises as described in Claim 4, size reduction can be achieved.
Moreover, if comprised as described in Claim 5, the tension | tensile_strength can be easily adjusted, without extending a ribbon-shaped body abnormally.

Embodiment 1 of the present invention will be described below with reference to the drawings.
In FIGS. 1 and 2, 11 is a tire intermediate body as a wound body including a carcass layer having a substantially toroidal shape and side treads attached to both outer sides in the axial direction of the carcass layer. The intermediate body 11 is supported from the inside in the radial direction by a rotatable and expandable / retractable tire forming drum (not shown). The tire intermediate body 11 rotates integrally with the tire forming drum as the tire forming drum rotates.

  14 is a ribbon-like body having a constant width as a narrow strip-like body wound from a roll (not shown) installed behind the tire intermediate body 11, and this ribbon-like body 14 is a small number bent in a wave shape. A non-extensible material such as a steel cord or a reinforcing cord made of aromatic polyamide is rubber-coated. The ribbon-like body 14 is taken up by the tire intermediate body 11 so as to travel toward the tire intermediate body 11 and be supplied to the outer periphery thereof. At this time, the ribbon-like body 14 is pressed by the pressing roller 15. Wrapping around the rotating tire intermediate body 11 while being pressed by.

  18 is a movable base installed in the middle of the travel path of the ribbon-like body 14 on the upstream side of the tire intermediate body 11, a screw block 19 on the front lower surface of the movable base 18, and a guide block on the rear lower surface. 20 are fixed respectively. Reference numeral 21 denotes a screw shaft whose both ends are rotatably supported by a fixed frame (not shown). The screw shaft 21 extends parallel to the axis of the tire intermediate body 11. Further, the central portion of the screw shaft 21 is screwed into the screw block 19. As a result, when the screw shaft 21 is rotated by receiving a driving force from a motor (not shown), the movable base 18 is moved to the tire intermediate body 11. Move in the axial direction.

  Reference numeral 23 denotes a guide rod having both ends fixed to the fixed frame, and the guide rod 23 extends in parallel to the screw shaft 21. The central portion of the guide rod 23 is slidably inserted into the guide block 20, so that the guide rod 23 moves smoothly on the movable base 18 when the movable base 18 moves in the axial direction. To guide you. Reference numeral 24 denotes a support plate fixed to the upper surface of the movable base 18 and extending in parallel with the ribbon-like body 14, and the support plate 24 is rotatably supported by guide rollers 25 having flanges at both ends.

  The ribbon-like body 14 is guided while being linearly in contact with the outer periphery of the guide roller 25 between the two flanges, so that movement in the width direction is regulated by the guide roller 25. As a result, when the tire intermediate body 11 rotates and the traveling ribbon-like body 14 is supplied to the tire intermediate body 11, the movable base 18 moves in the axial direction by the rotation of the screw shaft 21, The ribbon-like body 14 is gradually shifted in the axial direction by the guide roller 25, and is wound around the tire intermediate body 11 in a spiral shape.

  Reference numeral 28 denotes an induction motor as an electric motor installed upstream of the tire intermediate body 11, specifically, behind the guide roller 25, and the induction motor 28 is attached to the upper surface of the movable table 18. The induction motor 28 has a rotating shaft 29 extending toward the other side, and a roller 30 having an axis parallel to the axis of the tire intermediate body 11 is fixed to the center of the rotating shaft 29. As a result, the induction motor 28 is installed on one side of the roller 30.

  31 and 32 are guide rollers installed slightly below and immediately before and after the roller 30, respectively. These guide rollers 31 and 32 extend in parallel to the roller 30 and their base ends rotate to the support plate 24. Supported as possible. The ribbon-like body 14 on the upstream side of the tire intermediate body 11 is wound around a guide roller 32, a roller 30 and a guide roller 31 in order, and as a result, the ribbon-like body 14 is substantially half a circumference around the outer periphery of the roller 30. Therefore, the sliding between the ribbon-like body 14 and the roller 30 is restricted.

  35 is an inverter that performs vector control by outputting a frequency signal to the induction motor 28. When the frequency signal from the inverter 35 is input to the induction motor 28, the rotary shaft 29 and the roller 30 of the induction motor 28 are provided. Rotates at a rotational speed corresponding to the frequency signal. At this time, the rotation direction of the roller 30 is opposite to the traveling direction of the ribbon-like body.

  Here, since the force in the running direction of the ribbon-like body 14 is significantly larger than the tangential force generated on the outer periphery of the roller 30 due to the output torque of the induction motor 28, the induction motor 28 moves from the ribbon-like body 14 in the direction opposite to the rotational direction. On the other hand, the induction motor 28 and the roller 30 give a resistance in the direction opposite to the running direction to the ribbon-like body 14, but the value of this resistance is the value of the frequency signal. Can be easily controlled to an arbitrary value by changing the output torque of the induction motor 28.

  When resistance is applied from the roller 30 to the ribbon-like body 14 in this way, a predetermined tension is applied to the ribbon-like body 14 between the roller 30 and the tire intermediate body 11, that is, the ribbon-like body 14 at the time of winding. However, the tension value can be easily adjusted to an arbitrary value by changing the value of the frequency signal from the inverter 35 as described above.

  Further, as described above, when the ribbon-like body 14 is a narrow band-like body having a constant width formed by rubber coating a small number of non-stretchable reinforcing cords bent in a wave shape, the ribbon-like body is separated from the induction motor 28. The tension applied to 14 is preferably 40 N at the maximum. The reason is that the tension can be easily adjusted without abnormally stretching the ribbon-like body 14 when the value is equal to or less than the above-described value.

  Reference numeral 38 denotes an encoder provided on the other side of the roller 30. The encoder 38 is fixed to the support plate 24 and is connected to the roller 30 via the rotating shaft 29, and detects the number of rotations of the roller 30. . In this way, when the induction motor 28 is provided on one side of the roller 30 and the encoder 38 connected to the roller 30 is provided on the other side of the roller 30, it is compared with the one in which the induction motor and the encoder are integrated. Thus, each can be reduced in size and installed in a narrow space.

  41 is a controller that outputs a control signal to the inverter 35. When a control signal is input from the controller 41 to the inverter 35, the inverter 35 sends a frequency signal having a value corresponding to the control signal to the induction motor 28. Output. The detection result detected by the encoder 38 is input to the controller 41 as a feedback signal, and the value of the control signal is controlled by the feedback signal.

  The above-described inverter 35, encoder 38, and controller 41 as a whole give a predetermined resistance that is opposite to the traveling direction from the roller 30 to the ribbon-like body 14 by controlling the output torque of the induction motor 28. The control means 42 which adjusts the tension of the ribbon-like body 14 with the tire intermediate body 11 is configured. Thus, in this embodiment, since the detecting means for detecting the tension of the ribbon-like body 14 is unnecessary, the entire apparatus is downsized.

Next, the operation of the first embodiment will be described.
Now, when the tire intermediate body 11 rotates integrally with the tire forming drum, the ribbon-like body 14 unrolled from the roll and running toward the tire intermediate body 11 is taken up, and moved by the rotation of the screw shaft 21. It is assumed that the ribbon-like body 14 is spirally wound around the tire intermediate body 11 by the table 18 and the guide roller 25 moving at a constant speed in the axial direction of the tire intermediate body 11.

  At this time, the ribbon-like body 14 just before being wound around the tire intermediate body 11 is wound around the roller 30 fixed to the rotating shaft 29 of the induction motor 28, and the output torque of the induction motor 28 is controlled by the inverter of the control means 42. By controlling with the frequency signal output from 35, a resistance (braking force) in the direction opposite to the traveling direction is applied from the roller 30 to the ribbon-like body 14, so that the roller 30 and the tire intermediate body 11 are The tension of the ribbon-like body 14 at the time, that is, the tension of the ribbon-like body 14 at the time of winding is adjusted to a predetermined value.

  Here, since the outer diameter of the tire intermediate body 11 increases from the both axial ends toward the axial center, the winding torque changes following the change in the outer diameter. Although the tension at the time of winding of the body 14 may fluctuate, in this embodiment, the output torque of the induction motor 28 is controlled by the control means 42 (inverter 35). Even if it changes, the tension at the time of winding the ribbon-like body 14 can always be maintained at a constant value while saving labor and downsizing.

  In the above description, the tension at the time of winding the ribbon-like body 14 is kept constant. However, if this embodiment is used, an arbitrary tension is applied to the ribbon-like body 14 at an arbitrary position of the spiral. In addition, since the output torque of the induction motor 28 can be easily controlled with high accuracy by the control means 42, the ribbon-like body between the roller 30 and the tire intermediate body 11 can be easily applied. A desired tension can be easily applied to 14 with high accuracy.

  For example, as described above, the ribbon-like body 14 is spirally wound around the tire intermediate body 11, and then a belt layer and a tread are attached to the outer side in the radial direction of the tire intermediate body 11 to form a raw tire. The raw tire is carried into a vulcanizer and vulcanized, and the expansion rate of the central portion of the tread of the raw tire at the time of vulcanization is usually larger than the expansion rate of the end portion of the tread. The corrugated cord in the ribbon-like body 14 wound around is expanded more than the corrugated cord wound around the tread end, and the amplitude and pitch of the corrugated cord differ depending on the position in the width direction of the vulcanized tire. Sometimes.

  In order to prevent such a situation, when the ribbon-like body 14 is spirally wound from the tread end portion of the tire intermediate body 11 toward the tread central portion, it is guided by the frequency signal from the control means 42 (inverter 35). The output torque of the electric motor 28 may be gradually reduced so that the elongation rate of the corrugated cord after vulcanization may be substantially the same at any position in the width direction.

    In the above-described embodiment, the output torque of the induction motor 28 is controlled by the frequency signal from the inverter 35. However, in the present invention, the frequency signal and the current amount are determined by the amount of current from the inverter. The output torque of the induction motor may be controlled by both of them. Further, in the above-described embodiment, the tire intermediate body 11 is used as the wound body. However, in the present invention, a cylindrical molding drum or a hard core having the same outer surface shape as the inner surface of the product tire is used. Also good.

  In the above-described embodiment, the ribbon-shaped body 14 is a narrow band-shaped body formed by rubber coating a small number of non-stretchable reinforcing cords that are bent in a wave shape. A narrow strip formed by rubber coating a small number of organic fiber cords, for example, nylon cords, may be used. Further, in the above-described embodiment, the guide roller 25, the induction motor 28, the roller 30, and the encoder 38 are provided on the movable base 18 that moves in the axial direction of the tire intermediate body 11. However, in the present invention, While only the guide roller is provided on the table, the induction motor, the roller, and the encoder may be provided on the fixed table that is stationary behind the movable table.

  The present invention can be applied to the industrial field in which a narrow band-like body is spirally wound around a body to be wound.

It is a top view which shows Example 1 of this invention. It is the front view.

Explanation of symbols

11… Wound body 14… Narrow strip
28 ... Electric motor 29 ... Rotary shaft
30 ... Roller 35 ... Inverter
38 ... Encoder 42 ... Control means

Claims (5)

    A narrow band-shaped body running on the rotating wound body is supplied while being moved in the axial direction of the wound body, so that the narrow band-like body is spiraled around the wound body. When winding the belt, the narrow belt-like body is wound around a roller fixed to the rotating shaft of the electric motor provided on the upstream side of the wound body, and the output torque of the electric motor is controlled by the control means. A narrow band-like body characterized by imparting resistance in the opposite direction to the running direction from the roller to the narrow band-like body, and adjusting the tension of the narrow band-like body between the roller and the wound body. Supply winding method.     A narrow band-shaped body running on the rotating wound body is supplied while being moved in the axial direction of the wound body, so that the narrow band-like body is spiraled around the wound body. In the supply and winding device for the narrow band-shaped body wound around the roller, an electric motor in which a roller around which the narrow band-shaped body is wound is fixed to the rotating shaft upstream of the wound body, Control means is provided to control the output torque of the motor to give resistance in the direction opposite to the running direction from the roller to the narrow strip, and to adjust the tension of the narrow strip between the roller and the wound body. A supply winding device for narrow strips characterized by the above.     3. A narrow band-shaped supply winding apparatus according to claim 2, wherein an induction motor is used as said motor, and an output torque of said induction motor is controlled by at least one of a frequency signal or a current amount from an inverter of a control means. .     4. A narrow belt-like body according to claim 3, wherein an induction motor is provided on one side of the roller, and an encoder of a control means connected to the roller is provided on the other side of the roller, and the rotation of the roller is detected by the encoder. Supply winding device.     The tension applied to the narrow strip from the motor is 40 N at the maximum when the narrow strip is a ribbon-like body coated with a small number of non-stretchable reinforcing cords bent in a wave shape. The supply winding apparatus for a narrow strip according to any one of the above.

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