JP2005263456A - Tape winder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tape winder, applying fixed energizing force to the outer peripheral surface of a tape roll to thereby obtain a tape roll of good quality. <P>SOLUTION: This tape winder includes: a take-up shaft for winding the tape to form a tape roll; and a nozzle 16 for spraying gas to the outer peripheral surface of the tape roll in winding the tape. A throttle part 16C, which is a gas passage having a predetermined sectional area, is provided in the interior of the nozzle 16, the tip of the nozzle is a recessed blow-out part 16A having a sectional area larger than the sectional area of the throttle part, and the blow-out part and the throttle part are communicated with each other. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

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

  As a technique for winding a belt-like object such as a magnetic tape around a take-up shaft in a roll shape, various improved techniques have been proposed so far, and corresponding effects have been obtained.

  For example, 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, and a pressure roll. And a movable part moving means for displacing the wind pressure means in accordance with the winding diameter of the tape roll. Regardless of the winding diameter of the tape roll, the winding strength is kept constant by the cooperation of the contact pressure roll and the wind pressure means. It is configured to do.

  FIG. 8 is a perspective view showing a conventional tape winding device 100. The winding device 100 has a reel (corresponding to a winding shaft) 12, and this 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.

  The nozzle 116 is disposed so as to face the outer peripheral surface of the tape roll 15. 9 is a cross-sectional view of the nozzle 116 shown in FIG. 8, and FIG. 10 is a cross-sectional view of the nozzle 116 taken along line BB in FIG. As shown in FIGS. 9 and 10, an opening 116 </ b> A is formed at the tip of the nozzle 116. The opening 116 </ 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. The depth d of the slit-like portion of the opening 116A is formed with a size of 0.5 to 3.0 mm, for example.

  A hose 118 is connected to the rear end side of the nozzle 116. The hose 118 is connected to an air supply source (not shown), and air is supplied from the air supply source to the hose 118. In addition, flow paths 116 </ b> B and 116 </ b> C for communicating the nozzle 116 and the hose 118 are formed inside the nozzle 116. The channel 116B is a hole having the same size as the inner diameter of the hose 18, and the channel 116C is formed so that the pressure loss between the channel 116B and the opening 116A is reduced. That is, the flow path 116C gradually decreases in size in the horizontal direction as shown in FIG. 9 to become the slit interval g of the opening 116A, and gradually increases in size in the vertical direction as shown in FIG. It is formed so as to become a size of the width w of the opening 116A.

When air is supplied from the hose 18 to the nozzle 116 formed as described above, the air is blown out from the opening 116A of the nozzle 116 toward the outer peripheral surface of the tape roll 15 through the flow path 116B and the flow path 116C. .
JP-A-6-329308

  However, in such a winding device, various problems occur when the wind pressure applied to the tape roll fluctuates. For example, when the wind pressure is reduced, the air trapped in the tape is increased, so that the surface pressure in the radial direction in the tape roll is loosened 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. Therefore, there has been a strong demand for improvement of such problems.

  The present invention has been made in view of such circumstances, and it is possible to apply a constant urging force to the outer peripheral surface of the tape roll, and as a result, a tape winding capable of obtaining a tape roll of good quality. An object is to provide an apparatus.

  In order to achieve the above object, the present invention includes 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. In the tape take-up device, a constricted portion that is a gas flow path having a predetermined cross-sectional area is provided inside the nozzle, and a concave blowout having a cross-sectional area larger than the cross-sectional area of the constricted portion is provided at the tip of the nozzle. The tape winding device is characterized in that the blowing section and the throttle section communicate with each other.

  According to the present invention, since the tip portion of the nozzle is a concave blow-out portion having a cross-sectional area larger than the cross-sectional area of the throttle portion, the range of pressing the tape of the sprayed gas is widened and the tape is pressed. The overall power also becomes stronger. Thereby, a fixed urging force can be applied to the outer peripheral surface of the tape roll, and as a result, a tape roll of good quality can be obtained.

  In this invention, it is preferable that ratio of the cross-sectional area of the said blowing part and the cross-sectional area of the said aperture | diaphragm | squeeze part is 2-50. By setting the cross-sectional area ratio in such a range, a stable urging force can be applied.

  As described above, according to the present invention, the range for pressing the blown gas tape is widened and the overall force for pressing the tape is increased, so that a constant biasing force is applied to the outer peripheral surface of the tape roll. As a result, a tape roll of good quality can be obtained.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a tape winding device according to the present invention will be described 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 has 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 without a flange, the present invention is not limited to this, and a flanged reel in which a flange is provided at 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. 3 is a cross-sectional view of the nozzle 16, and FIG. 4 is a cross-sectional view taken along the line AA of FIG. As shown in these drawings, a concave blowout portion 16 </ b> A that is an opening is formed at the tip of the nozzle 16. The blowing portion 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 12.7 mm (1/2 inch), the width W of the blowing portion 16A is formed to be 8 to 15 mm, and the slit interval S (the length in the running direction of the tape 14) is 0.2. Formed to ˜2.0 mm. Moreover, the depth D of a slit is formed, for example with a magnitude | size of 0.1-2.0 mm.

  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, a flow path 16B and a flow path (throttle portion) 16C for communicating the nozzle 16 and the hose 18 are formed inside the nozzle 16. The channel 16 </ b> B is a hole having the same diameter as the inner diameter of the hose 18.

  The flow path (throttle section) 16C is a flow path that connects the flow path 16B and the blowing section 16A. The width V of the throttle portion 16C is formed so that the pressure loss between the flow path 16B and the blowing portion 16A is small. That is, as shown in FIG. 4, the flow path 16 </ b> C is formed so that the vertical size V gradually increases and becomes the width W of the blowing portion 16 </ b> A.

  On the other hand, the interval U (length in the running direction of the tape 14) of the narrowed portion 16C is formed smaller than the inner diameter of the hose 18 and the slit interval S of the blowing portion 16A. This interval U is formed to 0.05 to 0.2 mm, for example.

  That is, the cross-sectional area of the restricting portion 16C is smaller than the cross-sectional area of the blowing portion 16A. With such a configuration, a range in which the blown gas tape 14 is pressed is widened, and an overall force for pressing the tape 14 is also increased. Thereby, a fixed urging force can be applied to the outer peripheral surface of the tape roll 15, and as a result, a tape roll 15 of good quality can be obtained.

  The ratio of the cross-sectional area of the blowing part 16A and the cross-sectional area of the throttle part 16C is preferably in the range of 2 to 50, and more preferably in the range of 3 to 20. By setting the cross-sectional area ratio in such a range, a stable urging force can be applied. When the ratio of the cross-sectional areas is less than 2, the force by which the sprayed fluid presses the tape 14 is not strong. On the other hand, when the ratio of the cross-sectional areas is more than 50, the sprayed fluid is in the entire range of the blowing portion 16A. In any case, the effect of restricting the position of the tape 14 is diminished.

When a fluid is supplied from the hose 18 to the nozzle 16 formed as described above, the fluid passes through the flow path 16B and the narrowed portion 16C and is directed from the blowing portion 16A, which is the opening of the nozzle 16, toward the outer peripheral surface of the tape roll 15. And blown out. The flow rate of the fluid at that time is controlled to, for example, 5 to 50 (nL / mm ² · min). In addition, the kind of fluid is not specifically limited, Air, inert gas (for example, nitrogen gas), etc. can be 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 blowing 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 urging force such as 0.49N to 10N (= 50 gf to 1.02 kgf) 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.

  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.

  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.

  In particular, the configuration in which the cross-sectional area of the throttle portion 16C of the nozzle 16 is set to a value smaller than the cross-sectional area of the blowing portion 16A increases the range in which the tape 14 of the blown gas is pressed. Strength also increases. Thereby, a fixed urging force can be applied to the outer peripheral surface of the tape roll 15, and as a result, a tape roll 15 of good quality can be obtained.

  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.

  As mentioned above, although embodiment of the winding device of the tape which concerns on this invention was described, this invention is not limited to the said embodiment, Various aspects can be taken.

  For example, in the present embodiment, a system in which the nozzle 16 is slidably supported and urged with a constant urging force is employed, but a system in which the nozzle 16 is fixed at a predetermined position may be employed. That is, the effect of the present invention can be obtained if the overall force pressing the tape 14 can be increased by the configuration of the narrowed portion 16C and the blowing portion 16A of the nozzle 16.

  In this 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. An urging means for urging may be used.

  The tape winding device according to the present invention is particularly suitable as a winding device for winding a magnetic tape. It is necessary for the magnetic tape to align the edges of the tape at the time of winding, and to surely prevent air from being caught between the wound tapes. However, if the tape winding device of the present invention is used, the magnetic tape Can be wound with appropriate winding hardness, so that the edges can be aligned and rolled up neatly without involving air.

  The tape roll 15 was manufactured on various conditions using the winding device 10 shown by FIG. A magnetic tape having a width of 12.7 mm (1/2 inch) and a thickness of 8 μm was used as the tape 14. The running speed of the tape 14 was 5 m / min. The air flow rate was set to 40 nL / min, and the clearance between the tape 14 and the nozzle 16 was set to 40 μm.

Five types in which the shape of the blowing portion 16A of the nozzle 16 was changed were prepared. Specifically, the width W of the blowing portion 16A was fixed to 10 mm, and the slit interval S of the blowing portion 16A was changed from 0.1 to 2.5 mm. Therefore, the cross-sectional area of the blowout portion 16A changes to 1 to 25 mm ^2.

On the other hand, the cross-sectional shape of the flow path 16B was fixed. Specifically, the interval U between the throttle portions 16C was 0.1 mm, and the cross-sectional area of the flow path 16B was 1 mm ² .

  Therefore, the ratio of the cross-sectional area of the blowing portion 16A and the cross-sectional area of the throttle portion 16C is in the range of 1-25.

  The repulsive force (pressing force) of the air layer was measured from the reaction force received by the air cylinder 24 (unit: N).

  The tape roll 15 was manufactured using the nozzle 16 of the blowing portion 16A under each condition, and the repulsive force of the air layer was measured. The results are summarized in the graph of FIG. According to the graph, it can be seen that the repulsive force of the air layer tends to increase when the area ratio is in the range of 2-20. In the case where the area ratio was 25, the repulsive force of the air layer was large, but the quality of the tape roll 15 was poor. On the other hand, the quality of the tape roll 15 having an area ratio in the range of 2 to 20 was good. From the above results, it was confirmed that the area ratio is preferably in the range of 2-20.

The perspective view which shows the winding apparatus which concerns on this invention The top view which shows the winding apparatus which concerns on this invention Cross section of nozzle Sectional drawing which follows the AA line of 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. The graph which shows the result of an Example The perspective view which shows the winding device of a prior art example Sectional view of the nozzle shown in FIG. Sectional drawing which follows the BB line of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Winding device, 12 ... Reel, 13 ... Guide roller, 14 ... Tape, 15 ... Tape roll, 16 ... Nozzle, 16A ... Outlet part, 16B ... Flow path, 16C ... Restriction part (flow path), 18 ... Hose , 20 ... Slider, 21 ... Linear guide, 22 ... Rail, 24 ... Air cylinder

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,
A throttle part, which is a gas flow path having a predetermined cross-sectional area, is provided inside the nozzle, and a tip part of the nozzle is a concave blow-out part having a cross-sectional area larger than the cross-sectional area of the throttle part. A tape winding device, wherein the portion and the throttle portion are in communication with each other.   The tape winding device according to claim 1, wherein a ratio of a cross-sectional area of the blowing portion and a cross-sectional area of the throttle portion is 2 to 50.

Images