JP2003168280A - Method for evaluating figure of wound belt - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for evaluating the figure of a wound belt article which eliminates a human factor and performs constant objective evaluation without destroying or decomposing the case or reel. <P>SOLUTION: A magnetic tape 12 is supplied from a reel 11. An optical sensor 4 detects the positional variation in the width direction of the magnetic tape 12 in the whole region of the length direction. The position and the amount of winding deformation from the winding surface of the magnetic tape 12 wound on the reel 11 are calculated with a signal processor 5 on the basis of the detected signal, and are displayed on a printer 6. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for evaluating the winding form of a strip for evaluating the winding form of a strip such as a tape or web wound around a winding shaft. It is. 2. Description of the Related Art In general, a tape which is a belt-like material such as paper, plastic film or metal foil is shipped in a state of being wound around a reel (winding shaft). Thus, the tape wound on the reel not only looks bad if the winding shape is not good, but also the edge of the tape protruding from the winding surface may be damaged when dropped. The appearance has been evaluated for some time. In particular, in a magnetic tape cartridge in which a reel on which a magnetic tape is wound is housed in a cartridge case, the winding state of the magnetic tape is evaluated after the product is completed. The evaluation of the winding state of the magnetic tape in the magnetic tape cartridge is performed by the following different methods depending on the type of the magnetic tape cartridge. When the cartridge case and reel of the magnetic tape cartridge are transparent, a person visually evaluates the winding form from the outside of the cartridge case. Further, when the cartridge case of the magnetic tape cartridge is opaque and the reel is transparent, the cartridge case is disassembled and a person visually evaluates the winding state from the outside of the reel.
Further, when the cartridge case and the reel of the magnetic tape cartridge are opaque, after the cartridge case is disassembled, the reel is broken and the winding state is visually evaluated by a person. However, in the conventional evaluation method, since a person visually judges the winding state of the magnetic tape, not only the evaluation differs depending on the person to be measured, but also the magnetic tape is wound. It has been difficult to accurately grasp to which side of the surface the roll is collapsed and at which position in the radial direction the collapse is.
If the cartridge case is opaque,
After disassembling the cartridge case and evaluating the winding state of the magnetic tape, it was difficult to restore the original state when the cartridge case was reassembled. In addition, if the cartridge case and reel are opaque, they must be destructively inspected, such as breaking the reel, which not only prevents the reel from being reused, but also can damage the magnetic tape when the reel is broken. was there. [0005] Therefore, the object of the present invention is to obtain an objectively constant evaluation by eliminating human factors,
An object of the present invention is to provide a method for evaluating the winding state of a belt-shaped object that does not require disassembling or destroying a case or reel. Means for Solving the Problems A method for evaluating the winding shape of a belt-like object that has solved the above-mentioned problems is a method for evaluating the winding shape of a belt-like object wound around a winding shaft, wherein The position variation in the width direction of the belt-like object was detected by the detection means over the entire area in the length direction while being wound around the winding shaft or fed out from the winding shaft, and wound around the winding shaft based on the detection signal. The position and amount of unwinding from the winding surface of the belt-like object are calculated by the signal processing means and displayed on the display means. Here, the “winding surface” means a surface formed at the end in the width direction of the belt-like material wound around the winding shaft. In the present invention, the belt-like material is ideally wound around the winding shaft. It refers to a winding surface that becomes a reference value set in advance assuming the worn state. In addition, “the position of unwinding” refers to a position including a direction from the winding surface serving as a reference value and a position in the radial direction. According to the present invention, when the strip is fed out from the winding shaft, the position change in the width direction of the strip is detected over the entire region in the length direction. The detection signal from the detection means is input to the signal processing means, and the signal processing means calculates the position and amount of the collapse from the winding surface of the strip wound around the winding shaft based on the detection signal. The data calculated by the signal processing means is displayed (output) by the display means. DETAILED DESCRIPTION OF THE INVENTION The details of the method for evaluating the winding shape of a belt according to the present invention will be described below with reference to the drawings.
In this embodiment, as shown in FIG. 1, the present invention is applied to the evaluation of the winding form of a magnetic tape (band) 12 wound on a single reel (winding shaft) 11 in a magnetic tape cartridge 1. Is. As shown in FIG. 1, a winding form evaluation device 2 for evaluating the winding form of a magnetic tape 12 of a magnetic tape cartridge 1 includes a tape transfer device 3 and an optical sensor (detection means) 4.
And a signal processing device (signal processing means) 5 and a printer (display means) 6. The tape transfer device 3 includes a rotary shaft 31 on which the reel 11 of the magnetic tape cartridge 1 is mounted, and a reel 34 for winding the magnetic tape 12 wound around the reel 11.
Are mounted on the rotating shaft 32 and these rotating shafts 31, 32.
Two guide rollers 33, 33 arranged at appropriate positions between
And mainly. And this guide roller 33,
An optical sensor 4 is disposed at an appropriate position between 33. Here, as the guide rollers 33, 33, flanges are not formed at both ends which are generally used, but those formed simply in a columnar shape are used. In such a cylindrical guide roller, the movement in the width direction of the magnetic tape is not restricted by the flange, so that the position variation in the width direction of the magnetic tape can be accurately reproduced. As shown in FIG. 2, the optical sensor 4 mainly includes a light emitting portion 41 and a light receiving portion. This light emitting unit 41
The light receiving unit 4 transmits light that covers the entire width of the magnetic tape 12.
2 is irradiated. The light emitting unit 41 and the light receiving unit 4
When the magnetic tape 12 passes between the two, a part of the light is shielded by the magnetic tape 12, and the position variation (position variation in the width direction of the magnetic tape 12) of the shielded portion is caused by the light receiving unit 42. Has been detected. Therefore, this light emitting part 4
The light irradiated from 1 to the light receiving unit 42 is the magnetic tape 1
The light-emitting part 41 and the light-receiving part 42 are appropriately arranged so as to be substantially orthogonal to the surface 2. The signal processing device 5 is an A / D converter 5 that converts an analog signal from the optical sensor 4 into a digital signal.
1, a computer 52 to which a digital signal from the A / D converter 51 is input, and the computer 52
And an I / O port 53 connected to the network. The I / O port 53 exchanges data between a CPU (not shown) of the computer 52 and a motor (not shown) that rotates the rotary shaft 31 of the tape transfer device 3. Specifically, information about the rotation of the rotary shaft 31 through the I / O port 53 is sent to the CPU of the computer 52, and
The CPU to which the information is input returns a signal for stopping the rotating shaft 31 for a predetermined time to the I / O port 53. The CPU of the computer 52 is A / D
Based on the signal from the converter 51, the direction and amount of the collapse from the winding surface of the magnetic tape 12 wound on the reel 11 are calculated, and the calculated data and the I / O port 5 are calculated.
3 is calculated based on the signal from No. 3 in the radial direction of the reel 11. As described above, the signal processed by the signal processing device 5 is output from the printer 6 connected to the computer 52. Next, a method for evaluating the winding state of the magnetic tape 12 wound on the reel 11 of the magnetic tape cartridge 1 will be described. First, as shown in FIG. 1, the reel 11 of the magnetic tape cartridge 1 is mounted on the rotary shaft 31 of the tape transfer device 3 of the winding form evaluation device 2. The magnetic tape 12 is pulled out from an opening (not shown) of the magnetic tape cartridge 1, and the tip is wound around the reel 34 via each guide roller 33 of the tape transfer device 3. Then, a switch (not shown) of the winding form evaluation device 2 is turned on to operate the tape transport device 3, the optical sensor 4, the signal processing device 5, and the printer 6. When the tape transfer device 3 is operated, the reel 11 is rotated together with the rotary shafts 31 and 32, and the magnetic tape 12 is fed from the reel 11 to the rotary shaft 32. At this time, the position change in the width direction of the magnetic tape 12 is always detected by the optical sensor 4 disposed between the guide rollers 33. The analog signal detected by the optical sensor 4 is converted into a digital signal by the A / D converter 51 and transmitted to the computer 52. On the other hand, the rotation shaft 31 of the tape transfer device 3 is provided with a detector (not shown) for detecting that the rotation shaft 31 has made one rotation, and the signal detected from this detector is , The computer 5 via the I / O port 53
2 is transmitted. When the signal from the detector is input, the computer 52 returns a signal for stopping the operation of the tape transport device 3 to the I / O port 53 for a predetermined time.
The tape transfer device 3 is stopped at a predetermined time by a signal output from the O port 53. Further, the computer 52 processes the signal (position fluctuation in the width direction of the magnetic tape 12) from the optical sensor 4 on the basis of the signal from the detector (information obtained by rotating the rotating shaft 31 once), whereby the reel 11 The position change data for one turn of the magnetic tape 12 wound on the printer 6 is output by the printer 6. Then, the tape transfer device 3 starts to operate again after a predetermined time has elapsed, and the above operation is repeated over the entire length of the magnetic tape 12. According to the above, the following effects can be obtained in this embodiment. Since the position variation in the width direction of the magnetic tape 12 is output by the optical sensor 4, the signal processing device 5, and the printer 6, no error due to human factors occurs in the evaluation of the winding state of the magnetic tape, and the evaluation is kept constant. be able to. That is, it is possible to accurately grasp the direction and amount of collapse from the winding surface of the magnetic tape 12 wound on the reel 11. Further, since the magnetic tape 12 transferred between the two rotating shafts 31 and 32 is detected by the optical sensor 4, the magnetic tape can be wound without disassembling or destroying the case or reel of the magnetic tape cartridge. Can be evaluated. Further, since the signal processing device 5 processes the positional variation in the width direction of the magnetic tape 12 based on the information that the rotating shaft 31 has rotated once, the reel 1
The position variation can be grasped by dividing the magnetic tape 12 wound around 1 every turn. Therefore, the magnetic tape 12
It is possible to accurately grasp the position of the roll collapse in the radial direction. As described above, the present invention is not limited to the above-described embodiment, but can be implemented in various forms. In the present embodiment, the apparatus and method for evaluating the winding state of the magnetic tape 12 wound around the single reel 11 in the magnetic tape cartridge 1 are exemplified, but the present invention is not limited to this. For example, as shown in FIG. 3, even if the apparatus has two reels 71 and 71 such as a cassette tape 7 for music, the rotary shafts 31 and 32 in this embodiment are used.
By arranging the two reels 71 and 71 at positions where the two reels 71 and 71 can be mounted, the same effects as in the present embodiment can be obtained. In FIG. 3, the same components as those in the present embodiment are denoted by the same reference numerals, and the description thereof is omitted. In this embodiment, the position change in the width direction of the magnetic tape 12 fed out from the reel 11 of the magnetic tape cartridge 1 is detected. However, the present invention is not limited to this. For example, in the manufacturing process of the magnetic tape cartridge, by providing the optical sensor, the signal processing device, the printer, and the like as in this embodiment in the device that winds the magnetic tape on the reel, The winding shape may be evaluated by detecting a change in the position in the direction. In this embodiment, the optical sensor 4 is used as the detecting means. However, the present invention is not limited to this, and for example, it is possible to detect the positional fluctuation of a belt-like object such as an ultrasonic sensor or an image sensor. Any thing can be used. Further, the optical sensor 4 of the present embodiment measures the positional variation in the width direction of the magnetic tape 12 from the displacement of the shielded portion by irradiating light so as to cover the entire width of the magnetic tape 12. However, the present invention is not limited to this. For example, by irradiating only one end side in the width direction of the magnetic tape, the position variation in the width direction of the magnetic tape may be measured from the increase or decrease of the light shielding amount. In the present embodiment, an A / D converter 51,
The signal processing device 5 including the computer 52 and the I / O port 53 is employed as the signal processing means. However, the present invention is not limited to this, and for example, the signal processing device 5 may be configured only by an A / D converter and a computer. Good. In this case, the position variation in the width direction of the magnetic tape is continuously detected and inputted, but this continuous data is converted into a length for each turn in consideration of the thickness of the magnetic tape. By dividing and processing, it is possible to accurately grasp the position in the radial direction of the collapse of the magnetic tape. In the present embodiment, the printer 6 is used as the display unit. However, the present invention is not limited to this, and may be a monitor, for example. Furthermore, it goes without saying that the number and installation locations of the guide rollers 33 in the tape transfer device 3 of the present embodiment can be changed as appropriate. According to the present invention, the position variation in the width direction of the strip is detected by the detecting means, and the winding from the winding surface of the strip wound around the winding shaft is detected based on the detection signal. Since the position and amount of collapse are calculated and displayed, an error due to human factors does not occur in the evaluation of the winding shape of the strip, and the evaluation can be kept constant. In addition, the detection of the position variation in the width direction of the web is performed while winding the belt-like object around the winding shaft or feeding it from the winding shaft. Even if it is a case, the winding form of a strip can be evaluated without disassembling or destroying the case or the like.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram showing the configuration of a winding evaluation apparatus for a magnetic tape according to an embodiment. FIG. 2 is a schematic view showing an outline of an optical sensor according to the present embodiment. FIG. 3 is a configuration diagram showing a configuration of a winding form evaluation apparatus according to another embodiment of the present invention. [Explanation of Symbols] 11 Reel (winding shaft) 12 Magnetic tape (band) 2 Winding state evaluation device 3 Tape transfer device 31, 32 Rotating shaft 4 Optical sensor (detection means) 41 Light emitting portion 42 Light receiving portion 5 Signal processing device ( Signal processing means) 51 A / D converter 52 Computer 53 I / O port 6 Printer (display means) 71 Reel

Claims (1)

What is claimed is: 1. A method for evaluating a winding shape of a strip wound around a winding shaft, wherein the strip is wound around the winding shaft or fed out from the winding shaft. The position variation in the width direction of the object is detected by the detection means over the entire length direction, and the position and amount of the collapse from the winding surface of the belt-like object wound around the winding shaft are signaled based on the detection signal. A method for evaluating a rolled form of a strip, characterized in that it is calculated by a processing means and displayed on a display means.