JP2005089149A - Take-up device for tape - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a take-up device for a tape capable of making a nozzle certainly follow the outer peripheral surface of a tape roll and applying a certain pressure to the outer peripheral surface of the tape roll. <P>SOLUTION: The nozzle 16 of the take-up device 10 is disposed faced to the outer peripheral surface of the tape roll 15, and air is blown off from the nozzle 16 toward the outer peripheral surface of the tape roll 15. The nozzle 16 is fixed to a linear guide 21, and is supported movably with the tape roll 15. An air cylinder 24 is formed at the back of the nozzle 16, and the nozzle 16 is energized toward the tape roll 15 by the air cylinder 24. The nozzle 16 automatically moves to a balance position between the energizing force by the air cylinder 24 and the repulsive force of the air blown off from the nozzle 16. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a tape winding device, and more particularly to a winding device that winds a belt-like object such as a magnetic tape in a roll shape around a winding shaft.

  The winding device described in Patent Document 1 includes a contact pressure roll that is in rolling contact with the outer peripheral surface of the tape roll during winding, a wind pressure unit that blows air onto the outer peripheral surface of the tape roll during winding, a contact pressure roll and a wind pressure. Movable means moving means for displacing the means according to the winding diameter of the tape roll. In this winding device, various problems occur when the wind pressure applied to the tape roll fluctuates. For example, when the wind pressure is reduced, more air is wound on the tape, so that the surface pressure in the radial direction in the tape roll is relaxed and the edges of the wound tape are uneven. On the contrary, when the wind pressure increases, the winding hardness becomes hard and the quality such as tape edge damage is adversely affected. For this reason, it is necessary to always control the distance between the nozzle that is the wind pressure means and the outer peripheral surface of the tape roll to be constant so that the wind pressure applied to the outer peripheral surface of the tape roll is constant.

As a control method for controlling the distance between the nozzle and the outer peripheral surface of the tape roll to be constant, a method for calculating the winding diameter from the tape running speed and the reel rotation number and moving the nozzle position backward based on the calculated winding diameter There is. Further, there has been a method of detecting the distance between the outer peripheral surface of the tape roll and the nozzle with a laser displacement meter and controlling the nozzle position based on the detected value.
JP-A-6-329308

  However, since the former method has to calculate the winding diameter including the eccentric amount of the tape roll, expensive high-speed calculation equipment is required, and complicated control for correcting the nozzle position according to the calculation result is required. A system is required.

  In the latter method, it is necessary to correct the nozzle position at a high speed according to the measurement result of the distance between the outer peripheral surface of the tape roll and the nozzle. Therefore, as the number of rotations of the take-up reel is increased, the nozzle is moved to the outer peripheral surface of the tape roll. There is a problem that it is difficult to follow the above.

  The present invention has been made in view of such circumstances, and provides a winding device that allows a nozzle to reliably follow the outer peripheral surface of the tape roll and apply a constant urging force to the outer peripheral surface of the tape roll. For the purpose.

  In order to achieve the object, the invention of claim 1 is a winding shaft that winds a tape to form a tape roll, and a nozzle that blows gas toward the outer peripheral surface of the tape roll when winding the tape. A tape winding device comprising: a support means for supporting the nozzle so as to be movable forward and backward with respect to the outer peripheral surface of the tape roll; and the nozzle supported by the support means facing the outer peripheral surface of the tape roll. Urging means for urging with a constant urging force, and winding the tape at the position of the nozzle where the repulsive force in the gap between the nozzle and the tape roll balances the urging force of the urging means. It is characterized by taking.

  According to the first aspect of the present invention, the nozzle is supported so as to be movable forward and backward with respect to the outer peripheral surface of the tape roll, and the nozzle is biased with a constant biasing force against the outer peripheral surface of the tape roll. Is automatically moved to a position where the repulsive force in the gap between the outer peripheral surface of the tape roll and the nozzle and the urging force urged by the urging means balances and stops. Therefore, the nozzle is always maintained at a constant distance from the outer peripheral surface of the tape roll, and a constant pressing force is always applied to the outer peripheral surface of the tape roll. Thereby, a tape can be wound up by appropriate winding hardness.

  In order to achieve the above object, the invention of claim 2 is a winding shaft for winding a tape to form a tape roll, and a nozzle for blowing gas toward the outer peripheral surface of the tape roll when winding the tape. A tape take-up device in which the nozzle moves in a direction to advance and retreat with respect to the take-up shaft, and a conductive member attached to the nozzle and moved together with the nozzle, and in proximity to the conductive member And a magnetic member fixed to the main body of the winding device, the vibration of the nozzle being suppressed by a resistance force caused by an eddy current generated in the conductive member when the nozzle vibrates. It is characterized by.

  According to the invention of claim 2, since the conductive member is attached to the nozzle and the magnetic member is disposed in the vicinity of the conductive member, when the nozzle vibrates when moving, an eddy current is generated in the conductive member, This acts as a resistance to suppress nozzle vibration. Therefore, it is possible to prevent the urging force applied to the outer peripheral surface of the tape roll from fluctuating due to the vibration of the nozzle.

  According to the tape winding device of the present invention, the nozzle is slidably supported with respect to the outer peripheral surface of the tape roll, and the nozzle is urged with a constant urging force toward the outer peripheral surface of the tape roll. Therefore, the nozzle can always be kept at a constant distance from the outer peripheral surface of the tape, and the tape can be wound with an appropriate winding hardness. Further, according to the present invention, since the conductive member is attached to the nozzle and the magnetic member is disposed in the vicinity of the conductive member, vibration when the nozzle moves can be suppressed.

  Preferred embodiments of a tape winding device according to the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a perspective view showing a tape winding device 10 according to the present invention, and FIG. 2 is a plan view thereof.

  As shown in these drawings, the winding device 10 includes a reel (corresponding to a winding shaft) 12, and the reel 12 is connected to a motor (not shown). Then, by driving the motor, the reel 12 rotates, and the tape 14 is wound around the outer peripheral surface of the reel 12. Thereby, the tape roll 15 is formed. Although FIG. 1 and FIG. 2 show the reel 12 having no flange, the present invention is not limited to this, and a flanged reel provided with a flange on one or both ends may be used.

  The nozzle 16 is disposed so as to face the outer peripheral surface of the tape roll 15. As shown in FIGS. 3 and 4, an opening 16 </ b> A is formed at the tip of the nozzle 16. The opening 16 </ b> A is formed in a slit shape elongated in the width direction of the tape 14, and the size thereof is formed according to the dimension of the tape 14. For example, when the width of the tape 14 is 1/2 inch, the width W of the opening 16A is 8 to 15 mm, and the slit interval S (length in the running direction of the tape 14) is 0.1 to 0.3 mm, preferably 0. It is formed with 15 to 0.25 mm. Moreover, the depth D of a slit is formed, for example with the magnitude | size of 0.5-3.0 mm, and a pressure loss is adjusted by adjusting the dimension.

  A hose 18 is connected to the rear end side of the nozzle 16. The hose 18 is connected to a fluid supply source (not shown), and fluid is supplied from the fluid supply source to the hose 18. In addition, flow paths 16B and 16C for communicating the nozzle 16 and the hose 18 described above are formed inside the nozzle 16. The channel 16B is a hole having the same size as the inner diameter of the hose 18, and the channel 16C is formed so that the pressure loss between the channel 16B and the opening 16A is small. That is, the flow path 16C gradually decreases in size in the horizontal direction as shown in FIG. 3 to become the slit interval S of the opening 16A, and gradually increases in size in the vertical direction as shown in FIG. The opening 16A is formed to have a width W dimension.

When the fluid is supplied from the hose 18 to the nozzle 16 formed as described above, the fluid is blown out from the opening 16A of the nozzle 16 toward the outer peripheral surface of the tape roll 15 through the channel 16B and the channel 16C. The flow rate of the fluid at that time is controlled to 5 to 50 [NL / mm ² · min], for example. The type of fluid is not particularly limited, and air, an inert gas (for example, N ₂ ) or the like is used. Hereinafter, an example using air as a fluid will be described.

  FIG. 5 is an explanatory view for explaining the air blowing position with respect to the tape roll 15.

  When the point where the tape 14 contacts the tape roll 15 is defined as the contact point P, the air blowing position needs to be downstream from the contact point P in the winding direction. This is because even if air is blown onto the tape 14 upstream of the contact point P, the effect of adjusting the winding hardness of the tape roll 15 cannot be obtained.

  Further, the most preferable spraying position of air is preferably slightly downstream of the contact point P as shown in FIG. Specifically, it is preferable that the upstream edge portion Q of the nozzle 16 is downstream of the contact point P. That is, it is preferable to arrange the nozzle 16 so that the distance X from the contact point P to the edge portion Q in the winding direction is a positive number. When the nozzle 16 is arranged in this manner, the tape 14 can be prevented from vibrating when air is blown.

  As shown in FIGS. 1 and 2, the tape 14 is wound around the guide roller 13 and wound around the tape roll 15. The guide roller 13 is fixed to a housing (not shown) of the winding device 10. For this reason, as the winding diameter of the tape roll 15 increases, there is a problem that the position of the contact point P changes in the circumferential direction, and the positional relationship between the contact point P and the air blowing position changes. Therefore, when the winding diameter of the tape roll 15 is the smallest (see the two-dot chain line in FIG. 2), the guide roller 13 and the nozzle 16 are positioned so that the contact point P and the air blowing position satisfy the above relationship. Install. As a result, when the winding diameter of the tape roll 15 increases, the contact point P moves upstream in the winding direction, so that the air blowing position is always arranged downstream of the contact point P.

  As shown in FIG. 6, the guide roller 13 may be moved as the winding diameter of the tape roll 15 increases. In this case, the guide roller 13 is preferably fixed to the slider 20 of the linear guide 21 described later. Thereby, when the winding diameter of the tape roll 15 increases, the nozzle 16 moves so as to retract from the reel 12, and the guide roller 13 also moves accordingly. Therefore, the relationship between the contact point P and the air blowing position is kept substantially constant regardless of the winding diameter of the tape roll 15. That is, the air blown from the nozzle 16 is always blown downstream of the contact point P.

  The nozzle 16 arranged as described above is fixed on the slider 20 constituting the linear guide 21. The slider 20 is slidably supported by a rail 22, and the rail 22 is disposed in the radial direction of the reel 12 (that is, in a direction orthogonal to the surface in contact with the outer peripheral surface of the tape roll 15). Thereby, the nozzle 16 is supported so as to be able to advance and retract with respect to the outer peripheral surface of the tape roll 15.

  An air cylinder 24 is provided behind the nozzle 16. The air cylinder 24 is fixed to a housing of the apparatus main body (not shown). The rod 24A of the air cylinder 24 is expanded and contracted in the radial direction of the reel 12, and the nozzle 16 is taped by a constant biasing force, for example, 0.49N to 10N (= 50gf to 1.02kgf) by the tip of the rod 24A. It is biased toward the roll 15 side. When the nozzle 16 is urged from the rear toward the tape roll 15 in this way, the nozzle 16 approaches the tape roll 15, and the repulsive force of the air layer formed at a certain position, that is, the gap between the nozzle 16 and the tape roll 15, Then, it automatically moves to a position where the urging force by the air cylinder 24 balances and stops.

  For example, when the distance (gap) between the nozzle 16 and the outer peripheral surface of the tape roll 15 is small, the flow rate of air flowing out into the gap decreases, so the pressure of the air layer increases and the repulsive force increases. Therefore, since the repulsive force becomes larger than the urging force of the air cylinder 24, the nozzle 16 moves backward to a point where both are balanced. On the contrary, when the distance (gap) between the nozzle 16 and the outer peripheral surface of the tape roll 15 is large, the flow rate of air flowing out into the gap increases, so the pressure of the air layer decreases and the repulsive force decreases. Therefore, since the repulsive force is smaller than the urging force of the air cylinder 24, the nozzle 16 moves forward by the urging force of the air cylinder 24 and stops when both are balanced. In this way, the nozzle 16 is automatically adjusted to a position where the pressure of the air layer and the urging force of the air cylinder 24 are balanced, so that the nozzle 16 is always kept at a constant distance from the outer peripheral surface of the tape roll 15. . The air cylinder 24 is not limited to the piston type, and a bellows type urging means that does not generate a frictional force when the rod 24A is moved may be used.

  By the way, since the nozzle 16 is balanced by the pressure of the supplied air, it may vibrate or oscillate. Therefore, in the present embodiment, the vibration of the nozzle 16 is damped by attaching the conductive plate 26 to the nozzle 16 and providing the magnet 28 at a position close to the conductive plate 26.

  The conductive plate 26 is attached to the upper surface of the slider 20 and extends laterally. Below this conductive plate 26, a magnet 28 is disposed opposite the conductive plate 26 with a slight gap, and this magnet 28 is fixed to a housing (not shown) of the apparatus main body. For this reason, when the slider 20 vibrates back and forth, an eddy current is generated in the conductive plate 26. A resistance force (braking force) is generated by the eddy current, and the vibration of the conductive plate 26 is braked by the magnetic resistance. Thereby, since the movement of the nozzle 16 is stabilized, a constant pressing force can be applied to the outer peripheral surface of the tape roll 15.

  As shown in FIG. 2, the width dimension (vertical dimension in FIG. 2) of the conductive plate 26 is gradually increased from the vertex 26A to the vertex 26B so as to be the largest width L1 at the vertex 26A. Further, the width L2 is further reduced so that the width L3 is further decreased from the vertex 26A to the vertex 26C. Therefore, when the nozzle 16 is retracted from the state where the vertex 26C is located above the magnet 28 until the position of the vertex 26A reaches above the magnet 28, the area where the conductive plate 26 and the magnet 28 face each other (hereinafter referred to as the facing area). ) Increases rapidly. When the position of the vertex 26A reaches above the magnet 28, the facing area is maximized and the passing magnetic flux is maximized. From this state, when the nozzle 16 is retracted until the position of the vertex 26B reaches above the magnet 28, the facing area gradually decreases and the passing magnetic flux decreases. Therefore, when the nozzle 16 is retracted from the state closest to the reel 12, the resistance force that is applied when the nozzle 16 moves changes as shown in FIG. That is, at first, the resistance force starts from a state without resistance, and as the nozzle 16 is retracted, the resistance increases rapidly, and reaches the maximum at the point A through the point C. Then, after the point A is exceeded, the resistance force gradually decreases as the nozzle 16 moves backward, and after the point B is exceeded, it rapidly decreases to zero. 7 correspond to the state in which the vertices 26A, 26B, and 26C in FIG. 2 are located above the magnet 28, respectively.

  Next, the operation of the winding device 10 configured as described above will be described.

  The winding device 10 rotates the reel 12 so that the tape 14 is wound around the reel 12 and a tape roll 15 is formed. At that time, by blowing air from the nozzle 16 to the outer peripheral surface of the tape roll 15, the tape 14 is brought into close contact with the outer peripheral surface of the tape roll 15, and air entrainment is prevented.

  During winding, the nozzle 16 is urged toward the outer peripheral surface of the tape roll 15 with a constant urging force by the air cylinder 24. Further, the nozzle 16 receives a repulsive force from the air layer at the tip of the nozzle 16 by blowing air from the nozzle 16. Therefore, the nozzle 16 automatically moves to a position where the repulsive force due to the air layer at the tip of the nozzle 16 and the urging force due to the air cylinder 24 at the rear end of the nozzle 16 are balanced and stops. As a result, the distance between the nozzle 16 and the outer peripheral surface of the tape roll 15 is kept constant, so that a constant pressing force is always applied to the outer peripheral surface of the tape roll 15 and the tape 14 is wound with an appropriate winding hardness. Can be taken. In addition, as a pressing force concerning the outer peripheral surface of the tape roll 15, 0.05-0.7 Mpa is preferable, and it is preferable to set urging | biasing force so that it may become this range. For example, the size of the opening 16A of the nozzle 16 is 8 mm × 0.2 mm, the width of the tape 14 is 1/2 inch, the winding speed of the tape 14 is 1 to 20 m / s, and the tension of the tape 14 is 20 to 150 gf. In the case of / (1/2 in), the pressing force for pressing the tape roll 15 through the air blown from the nozzle 16 is 0.63 MPa, which is an appropriate value. As the pressing force becomes smaller than this value, the effect of the air blowing gradually decreases, and when the pressure becomes 0.05 MPa or less, the effect is almost lost. Accordingly, the pressing force is preferably set to 0.05 Mpa or more. Further, depending on the material and thickness of the tape 14, a sufficient effect can be obtained even if the pressing force is set to be larger than 0.63 Mpa. However, if the pressure exceeds 0.7 Mpa, the tape 14 may be damaged. Accordingly, the pressing force is preferably set to 0.7 Mpa or less. By setting the pressing force in such a range, the tape 14 can be wound up neatly.

  As described above, according to the winding device 10 of the present embodiment, the nozzle 16 is slidably supported and urged toward the tape roll 15 with a constant urging force. It is kept at a constant distance from the 15 outer peripheral surfaces. In addition, since a constant pressing force is applied to the outer peripheral surface of the tape roll 15 by the air blown from the nozzle 16, the tape 14 is wound with an appropriate winding hardness.

  Further, according to the winding device 10, the nozzle 16 is supported so as to be movable forward and backward with respect to the outer peripheral surface of the tape roll 15, so that if the nozzle 16 gets too close to the outer peripheral surface of the tape roll 15, the nozzle 16 is blown out. The repulsive force of the air layer increases and moves in the direction of retreating from the outer peripheral surface of the tape roll 15. Therefore, the nozzle 16 can be prevented from coming into contact with the outer peripheral surface of the tape roll 15.

  Further, according to the winding device 10, when the nozzle 16 vibrates, an eddy current proportional to the square of the vibration speed is generated on the conductive plate 26 and a resistance force (braking force) is applied. Vibration is damped. Thereby, since the movement of the nozzle 16 is stabilized, a constant pressing force can be applied to the outer peripheral surface of the tape roll 15.

  In particular, in the present embodiment, since the conductive plate 26 is formed so that the resistance force acting on the nozzle 16 changes as the nozzle 16 moves, an appropriate resistance force can always be applied to the nozzle 16. For example, at the start of winding of the tape 14, a small resistance is applied as shown in FIG. Even when the winding diameter of the tape roll 15 increases abruptly, the nozzle 16 can follow smoothly. That is, when the traveling speed (winding speed) of the tape 14 is high, such as 10 m / s or more, the amount of increase in the winding diameter of the tape roll 15 is large at the start of winding, and the backward direction of the nozzle 16 Although the amount of movement is large, the nozzle 16 can smoothly follow by reducing the resistance.

  In the present embodiment, a small resistance force is applied to the nozzle 16 immediately before the end of winding. Since the winding diameter of the tape roll 15 is large immediately before the end of winding, the period of variation in the distance between the outer peripheral surface of the tape roll 15 and the nozzle 16 due to the eccentricity of the tape roll 15 is large, and the nozzle 16 is difficult to vibrate. Therefore, the vibration of the nozzle 16 can be sufficiently suppressed only by giving a small resistance force to the nozzle 16.

  On the other hand, a large resistance is applied to the nozzle 16 in the vicinity of the points A to B in FIG. In this vicinity, the nozzle 16 is likely to vibrate under the influence of the eccentricity of the tape roll 15. Therefore, the vibration of the nozzle 16 is braked by applying a large resistance force to the nozzle 16. Moreover, since the winding diameter of the tape roll 15 increases gradually from the A point to the B point, the nozzle 16 becomes difficult to fluctuate gradually. Therefore, by gradually reducing the resistance force applied to the nozzle 16 from the point A to the point B, the followability of the nozzle 16 to the tape roll 15 is improved while sufficiently suppressing the vibration of the nozzle 16.

  Thus, in the winding device 10, the resistance force against the vibration of the nozzle 16 is automatically adjusted as the nozzle 16 moves, so that the nozzle 16 follows the outer peripheral surface regardless of the winding diameter of the tape roll 15. Therefore, the vibration of the nozzle 16 can be sufficiently suppressed.

  In the above-described embodiment, the air cylinder 24 is used as means for urging the nozzle 16 with a constant urging force. However, the present invention is not limited to this, and a hydraulic cylinder, gravity, magnetic force, or the like is used. Then, an urging means for urging may be used.

  Further, the internal shape of the nozzle 16 is not limited to the above-described embodiment, and may be formed as shown in FIG. 8, for example. The nozzle 16 shown in FIG. 8 has a slit-like opening 16A formed in the same manner as the nozzle 16 shown in FIG. 4, and the width dimension of the slit (the vertical dimension in FIG. 8) is in the depth direction ( It is formed so as to gradually increase in the left-right direction in FIG. By using the nozzle 16 having such a shape, the pressure loss inside the nozzle 16 can be further reduced.

  In the above-described embodiment, the nozzle 16 in which the opening 16A is formed in a slit shape is used. However, the shape of the nozzle 16 is not limited to this. For example, a nozzle having a round hole opening (not a nozzle) A plurality of them may be provided in the width direction of the tape 14. In addition, a throttle may be provided in the flow path of the fluid supplied to the nozzle 16 to adjust the gradient of the repulsive force (apparent spring constant) between the nozzle 16 and the tape 14.

  Further, in the above-described embodiment, the magnet 28 is provided on the lower side of the conductive plate 26, but may be provided on the upper side or on both the upper and lower sides. When provided on both the upper and lower sides, they may be connected by a yoke so that the upper and lower magnetic circuits are closed. In the above-described embodiment, the conductive plate 26 is provided only on one side of the nozzle 16, but may be provided on both sides. Further, the conductive plate 26 may be attached vertically, and magnets 28 may be disposed on the left and right sides of the conductive plate 26.

  In the above-described embodiment, the magnet 28 is fixed and the conductive plate 26 is moved together with the nozzle 16. Conversely, the conductive plate 26 is fixed and the magnet 28 is moved together with the nozzle 16. Also good.

  The magnet 28 is not limited to a permanent magnet, and may be an electromagnet. When an electromagnet is used, the magnitude of the resistance force can be adjusted according to the displacement, speed or frequency of the nozzle 16 by controlling the applied current. In that case, the conductive plate 26 may be formed in a rectangular shape having a constant width.

  Further, the conductive plate 26 is not limited to a plate-like material as long as it has conductive properties, but a material having a low specific gravity and good electrical conductivity may be selected.

  The winding device according to the present invention is suitable as a winding device for winding a magnetic tape. For magnetic tape, it is necessary to align the edges of the tape at the time of winding, and to prevent air entrainment between the tapes that have been wound up. Since it can be wound with a good winding hardness, it is possible to wind up neatly by aligning the edges without involving air.

  FIG. 9 shows another mechanism for generating a braking force on the nozzle 16.

  As shown in FIG. 9, throttles 25, 25 for adjusting the flow rate are provided at the air inlet and the air outlet of the air cylinder 24. Therefore, when the nozzle 16 vibrates in the left-right direction in FIG. 9, the rod 24A is also displaced in the left-right direction in FIG. A piston 24B is provided at the rear end of the rod 24A. When the rod 24A is displaced, the viscous fluid in the air cylinder 24 is discharged from the air cylinder 24 or flows into the air cylinder 24. At that time, the viscous fluid passes through the throttles 25 and 25, and a resistance force proportional to the moving speed of the rod 24A is generated. Since the braking force is generated in the nozzle 16 by the resistance force generated at this time, the vibration of the nozzle 16 can be suppressed.

  In the example shown in FIG. 9, the braking force is generated by providing the diaphragm 25, but a dash pod filled with a viscous fluid may be provided to apply the braking force to the nozzle 16.

  In FIG. 9, a brake is provided as an example of another mechanism for generating a braking force on the nozzle 16. The brake shown in the figure includes a conductive plate 26, a pad 32, a pad 34, an electromagnet 36, and a yoke 38. By applying a current to the electromagnet 36, the pad 32 and the pad 34 come into contact with the conductive plate 26. Therefore, the braking force for the nozzle 16 can be adjusted by adjusting the applied current.

  FIG. 10 shows another mechanism for generating a braking force on the nozzle 16.

  As shown in FIG. 10, a voice coil type linear motor 40 is provided behind the nozzle 16, and a constant urging force is applied to the nozzle 16 by the linear motor 40. A permanent magnet 42 and a yoke 44 are provided on the fixed side of the linear motor 40, and a voice coil 46 is attached on the nozzle 16 side.

  By supplying a constant current to the voice coil 46, the nozzle 16 can be urged with a constant urging force in the direction of the tape roll 15. Further, by driving this current at a constant current or driving at a constant voltage, it is possible to generate a resistance force corresponding to the moving speed of the voice coil 46. Thereby, the vibration of the nozzle 16 can be braked.

  Note that a compression spring having a low spring constant may be provided between the yoke 44 and the nozzle 16 so as to press the force in a direction in which the yoke 44 and the nozzle 16 are separated from each other. In that case, a resistor may be connected between the terminals of the voice coil 46 to brake the vibration of the nozzle 16 (moving speed of the voice coil 46). Further, the braking force can be changed by making the resistance value variable.

  FIG. 10 shows an example in which a motor 50 is used as another mechanism for generating a braking force on the nozzle 16. The motor 50 is fixed to the base of the winding device 10, and a pinion gear 52 is attached to the rotating shaft of the motor 50. A rack 54 that moves together with the nozzle 16 is provided on the nozzle 16 side, and the pinion gear 52 is configured to rotate when the rack 54 moves.

  When configured as described above, the nozzle 16 can be urged in the direction of the tape roll 15 with a constant urging force by flowing a constant current through the motor 50. Further, by driving this current at a constant current or driving at a constant voltage, a resistance force corresponding to the rotation speed of the motor 50 can be generated, and the vibration of the nozzle 16 can be braked.

  In this case, the nozzle 16 may be biased toward the tape roll 15 using a spring having a low spring constant.

  FIG. 11 shows a calculation example of the frequency characteristic of the follow-up deviation ratio of the nozzle 16 when another mechanism for generating a braking force is provided to the nozzle 16 in the tape winding device 10.

  In the figure, the spring constant K between the nozzle 16 and the tape 14 is 4000 N / m, the mass M of the nozzle 16 is 0.02 kg, and the viscous friction coefficient (or damping coefficient) C = between the nozzle 16 and the tape 14. The frequency characteristic of the tracking deviation ratio between the tape 14 and the nozzle 16 in the model in the case of 12 Ns / m is shown.

  When a constant is set as shown in the figure, it corresponds to the case where the damping ratio ζ = 0.7, and the natural frequency is f1 = 71.2 Hz, so the distance between the tape 14 and the nozzle 16 is about several millimeters. When it can be set relatively long, it is possible to ensure followability up to a frequency of about 80 Hz (corresponding to the case where the outer diameter of the tape roll is 40 mm and the winding speed of the tape 14 is 10 m / s). Become. Further, even when the distance between the tape 14 and the nozzle 16 is about 1 mm and the displacement of the tape 14 is about 0.5 mm, the constant shown in FIG. Further, even when the distance between the tape 14 and the nozzle 16 is about 1 mm and the displacement of the tape 14 is about 1 mm, if the frequency (the number of rotations of the tape roll 15) is 40 Hz or less, The constants shown in FIG.

  When the width of the tape 14 is wide and the mass of the nozzle 16 is as heavy as 1 kg, or when other conditions are changed, depending on the winding speed of the tape roll 15 to be used and the displacement of the tape 14, The spring constant K and viscous friction coefficient C are determined as appropriate.

  FIG. 12 shows the relationship between the damping ratio ζ and the tracking deviation ratio of the mechanism that generates the braking force provided in the tape winding device 10.

  As shown in the figure, the maximum value of the tracking deviation ratio (E / A) varies greatly depending on the value of the damping ratio ζ. If the value of ζ = C / (2 × SQR (M × K)) is small, the amplitude due to resonance increases and the tracking deviation ratio deteriorates. Therefore, in the braking device of the tape winding device 10 according to the present invention, since the gap between the tape 14 and the nozzle 16 is narrow, it is desirable to set various constants so that ζ ≧ 0.7.

The perspective view which shows the winding apparatus which concerns on this invention The top view which shows the winding apparatus of FIG. Sectional view of the nozzle shown in FIG. Sectional drawing of the nozzle along line 4-4 in FIG. Explanatory drawing explaining the blowing position of air FIG. 2 is a plan view of a winding device using a guide roller different from FIG. Diagram showing resistance force over time 4 is a cross-sectional view of a nozzle having a different opening shape The figure which shows other embodiment of the mechanism which generate | occur | produces the braking force to a nozzle. The figure which shows other embodiment of the mechanism which generate | occur | produces the braking force to a nozzle. Example of calculating frequency characteristics of tracking deviation ratio by a mechanism that generates a braking force on the nozzle The figure which shows the relationship between the damping ratio of the mechanism which generates the braking force in the nozzle, and the tracking deviation ratio

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Winding device, 12 ... Reel, 13 ... Guide roller, 14 ... Tape, 15 ... Tape roll, 16 ... Nozzle, 18 ... Hose, 20 ... Slider, 21 ... Linear guide, 22 ... Rail, 24 ... Air cylinder, 26 ... conductive plate, 28 ... magnet

Claims (2)

In a tape winding device comprising a winding shaft that winds the tape to form a tape roll, and a nozzle that blows gas toward the outer peripheral surface of the tape roll when winding the tape,
Support means for supporting the nozzle so as to be movable forward and backward with respect to the outer peripheral surface of the tape roll;
Biasing means for biasing the nozzle supported by the support means toward the outer peripheral surface of the tape roll with a constant biasing force;
And a tape winding device, wherein the tape is wound at a position where a biasing force of the biasing means and a repulsive force in a gap between the nozzle and the tape roll are balanced. A winding shaft that winds the tape to form a tape roll; and a nozzle that blows gas toward the outer peripheral surface of the tape roll when the tape is wound, the nozzle moving forward and backward with respect to the winding shaft In the tape take-up device that moves in the direction of
A conductive member attached to the nozzle and moving with the nozzle;
A magnetic member disposed in opposition to the conductive member and fixed to the main body of the winding device, and a resistance force caused by an eddy current generated in the conductive member when the nozzle vibrates. A tape winding device characterized by suppressing vibration of a nozzle.

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