JPS61199536A - Crape pattern forming method on surface of tape running shaft - Google Patents

Abstract

PURPOSE:To reduce a cost by driving rotatively the hard rotary body having crape-shaped pattern on the rotary peripheral face and by performing the surface finish with the press contact of the shaft face to this rotary peripheral face. CONSTITUTION:A hard rotary body 2 is supported and the rotary peripheral face 6 is formed so as to make a crape shape. The rotary body 2 is formed by a resin bonded grindstone. Two pieces of elastic guide rolls 3 are arranged freely rotatably on a press contact arm 4 and the shaft core is made in parallel to the rotary shaft 5. The tape running shaft 1 is inserted between the rotary body 2 and guide roll 3 and subjected to a press contact by the roll 3 to the rotary peripheral face 6 with the state in parallel to the rotary shaft 5. The crape pattern on the rotary peripheral face 6 is thus transferred to the peripheral face of the shaft 1. The tape running shaft 1 causing no slips can be therefore formed inexpensively.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a method for forming a matte pattern on the surface of a tape running shaft, and relates to a method for forming a matte pattern on the surface of a tape running shaft used in a tape drive mechanism of a device for recording and reproducing audio or video on a tape. To,
This invention relates to a method for forming a satin pattern on the surface of a tape running shaft, which facilitates the work of forming a satin pattern to prevent tape from slipping, and also makes the satin pattern suitable for preventing tape from slipping. It is something.

[Technical Background of the Invention and Problems 1] A tape drive mechanism of a device that stores and reproduces audio or video on a tape, such as a tape recorder or a video recorder, has a tape drive mechanism made of a tape running shaft and an elastic material such as rubber. The tape is sandwiched between two pinch rollers, and the tape running shaft is rotated at a constant speed to run the tape at a constant speed, thereby eliminating tape running unevenness (hereinafter referred to as wow and flutter).

Conventionally, in order to suppress the wow and flutter, research and development has been carried out to improve the roundness of the tape running shaft as much as possible, and to improve the roundness of the drive motor. Research was conducted to improve various types of accuracy in order to eliminate unevenness, and attention was focused only on these points.

However, when we actually researched the causes of wow and flutter, we found that it was not only due to the roundness of the tape running shaft and uneven rotation of the drive motor, but also due to slippage during tape feeding between the tape running shaft and the pinch roller. It turned out to be one of the major causes.

Therefore, an attempt was made to increase the friction force by strengthening the pressure contact between the tape running shaft and the pinch roller, but the tape running shaft is extremely thin due to the mechanical structure of tape recorders and video recorders. If a force exceeding a certain level is applied, the tape running shaft may be bent or the tape may be scratched, resulting in increased distortion and noise, and there is a limit to how much pressure can be increased.

Therefore, the tape contact on the tape running shaft.

When the contact surface was made with a satin pattern, there was almost no slip between the tape running shaft and the tape, and extremely good tape running was obtained with little wow and flutter.

However, methods for forming a satin pattern on a predetermined peripheral surface of a tape running shaft include sandblasting, surface nitriding, chemical porous etching, chemical etching,
Examples include a coating method, a local heating method (a method for forming an oxide film locally), and a local plating method, but each method has its own drawbacks.

In other words, in the sandblasting method, it is necessary to form a satin pattern only on a predetermined peripheral surface, so the other parts must be masked, which increases the cost, and the amount of abrasive grains that are injected increases. Since large scratches are likely to occur due to scratches caused by scratches, and satin unevenness is also likely to occur, the formed satin pattern is not good and has the drawback of adversely affecting tape running.

In addition, since the surface nitriding method is performed by heating the entire tape running shaft, nitriding creates unevenness on the entire surface of the tape running shaft. It has been processed and cannot be used, and it also has the disadvantage that it bends because it is heated as a whole at a high temperature.

Furthermore, with the chemical porous etching method, materials must be specially selected and the roughness differs depending on the material, making it extremely difficult to select the roughness of the satin pattern, and the formation itself is large-scale. Similar to the sandblasting method, the chemical etching method has the disadvantage of requiring a lot of masking work, and it is difficult to form uniform unevenness, and the protrusions tend to be rounded compared to the roughness. It has drawbacks such as a low coefficient of friction.

In the coating method, since the tape running shaft itself is used very frequently, the coating layer itself must be made very strong, and the coach ink for this has to be very expensive. In the local heating method, only predetermined areas are heated and slowly cooled, so there is a risk that the bearings of the tape running shaft may become dull and hardness may decrease, and the tape running shaft itself must be made with very high precision. Since the material is heated, the precision will inevitably decrease.Also, since the satin pattern formed by heating is an oxide film, the film itself is very thin and will quickly disappear after a few uses. There is a drawback.

In the local plating method, the plating itself is performed by a chemical reaction, etc., so the surface roughness is unstable and is too rough, which can damage the tape.In addition, like the chemical etching method, the masking process is required. Furthermore, there is a disadvantage that the outer diameter of the tape running shaft becomes thicker than the standard size due to uneven thickness of the plating layer, or the roundness becomes poor.Also, the plating process time is long, which increases the cost. It also led to

In other words, depending on each of these methods, it was not possible to obtain a satisfactorily satined pattern, and the tape was often full of scratches. Both methods have drawbacks such as manual labor, long processing times, and poor mass productivity.Furthermore, there are chemicals and parts that are consumed during the processing process.
Alternatively, the cost of consumables such as abrasive grains and consumable tools will increase.
It was inevitable that the cost would be relatively high.

[Object of the invention] The present invention eliminates all of the above-mentioned drawbacks and makes it possible to form a very good satin pattern on a predetermined circumferential surface of a tape running shaft easily in a short time and at low cost. It was created for the purpose of

[Summary of the Invention] In order to achieve the above-mentioned object, the present invention provides a process for finishing the surface of a tape running shaft used in a tape drive mechanism of an apparatus for recording and reproducing audio or video on a tape, so that the rotating circumferential surface has a matte finish. The invention consists in rotating a hard rotary body by disposing a hard rotary body so as to be rotatable and driving the rotary body by pressing the surface of the tape running shaft on which the satin pattern is to be formed onto the rotating peripheral surface of the rotary body.

[Embodiments of the Invention] The present invention will be described in detail below with reference to the drawings.

A device for recording and reproducing audio or video on a tape, such as a tape recorder as shown in FIG. 9 or a video recorder (not shown), is equipped with an elastic material such as rubber to feed the tape T at a constant speed. A tape drive mechanism is constructed so that the tape (2) is pressed and held between a pinch roller P and a tape running shaft 1 driven and rotated by a servo motor M or the like.

However, even if the tape T is pressed and held between the tape running shaft 1 and the pinch roller P, the tape slips slightly during tape feeding as described above. Therefore, in order to prevent slipping, a satin-finished pattern was formed at a predetermined position on the circumferential surface of the tape running shaft 1 in the finishing process using the method shown in each of the following examples. I was able to get it.

That is, in the first embodiment, as shown in FIG. 1, the hard rotating body 2 is rotatably supported, and at this time, the hard rotating body 2 is formed with a resin bonded grindstone so that the rotating peripheral surface 6 is Make it look pear-like. A pressure contact arm 4 is formed in which two guide rolls 3 made of an elastic material are rotatably supported in parallel. The guide roll 3 is pressed in the direction of the rotational circumferential surface 6 of the hard rotary body 2 so as to be parallel to the rotation surface 6 of the hard rotary body 2. Therefore, we changed the tape running shaft 1 to 2.
The tape is inserted between the book guide rolls 3 and between the guide roll 3 and the rotating circumferential surface 6, and the guide roll 3 allows the tape running shaft 1 to rotate freely and parallel to the rotation axis 5 of the rigid rotary body 2. The rotating peripheral surface 6 of the hard rotating body 2 is pressed against the rotating peripheral surface 6 of the hard rotating body 2 while being held in the same position.

Then, since the tape running shaft 1 is pressed against the rotating circumferential surface 6 while rotating in synchronization with the rotation of the hard rotating body 2, the satin pattern on the rotating circumferential surface 6 of the hard rotating body 2 is transferred to the circumferential surface of the tape running shaft 1. Ru. At this time, if the width of the rigid rotating body 2 is set to the width of the satin pattern to be formed on the circumferential surface of the tape running shaft 1, a satin pattern of only that width will be formed at a predetermined position on the □ surface of the tape running shaft. can do.

If you zoom in on the satin pattern formed in this case, you will see that the 8th
As shown in the figure, countless recesses 7 are formed by the abrasive grains of the resin bond grindstone, and the recesses 7 themselves have fine irregularities, and each corner thereof is formed to be sharp to some extent. As a result, these fine irregularities catch on the minute irregularities on the surface of the tape 1, increasing the frictional force. In reality, the surface roughness of the satin pattern due to the recesses 7 is reduced to 0.
．． Since good results can be obtained with a value of 3 to 0.5μ, the particle size of the resin bond grindstone is appropriately set to this value. Then, the fine irregularities of the recessed portion 7 become even finer surface roughness, so that only the frictional force can be increased without causing any scratches on the tape (2).

Further, the hard rotating body 2 may be a vitrified grindstone, a rubber bond grindstone, or the one shown in FIG. 7(a).

A diamond wheel made of metal bond type, resin bond type, or electrodeposition as shown in (b), Borazon CBN wheel made of metal bond type, resin bond type, or electrodeposition, etc., and as shown in Fig. 7 (c). It may also be formed using a vitrified borazone grinding wheel, and in these cases, the hand grain size setting and usage conditions are the same as in the case of the resin bonded grinding wheel, and the effect is the same as that of the tape grinding wheel. It is possible to increase only m vibration force without causing any damage to T. In the case of the metal bond type, resin bond type, or electrodeposition diamond wheel, metal bond type, resin bond type, or electrodeposition type Borazon CBN wheel, vitrified borazone grinding wheel, etc., they are more expensive than resin bonded grinding wheels. However, since there is almost no wear, there is no need to dress or replace the grindstone, making it very efficient.

Further, as the hard rotating body 2, as shown in FIG. 7(d), a wheel formed of cemented carbide and whose peripheral surface is previously formed into a satin pattern by electric discharge machining may be used. Alternatively, as shown in Figure 7 (e), high speed tool steel (
It is also possible to use a wheel made of high-hardness special steel such as SKH) and whose surface is formed into a matte pattern by electric discharge machining or dry or wet sandblasting.

In that case, the electrical discharge machining or sandblasting is
It must be done so that the unevenness of the peripheral surface is uniform and has the desired surface roughness. Therefore, the electrical discharge machining speed, the grain size of the abrasive grains used for sandblasting, and the sandblasting conditions are adjusted so that the surface roughness of the circular satin pattern is 0 as described above.
．． It must be set appropriately so that it is 3 to 0.5μ. In the figure, 22 is an electrode used for electric discharge machining, 23 is a nozzle used for sandblasting, and 24 is an abrasive grain.

Next, in the second embodiment, as shown in FIG. 2, the satin pattern on the surface of the tape running shaft 1 is formed into multiple stripes.
At that time, an appropriate number of grooves 10 are carved in the circumferential direction of the rotating circumferential surface 6 of the hard rotating body 2 to form a plurality of grooves 10 on the rotating circumferential surface 6 corresponding to the satin pattern to be formed on the surface of the tape running shaft 1. Alternatively, the rotating circumferential surface 6 is formed by stacking a plurality of hard rotating bodies 2 having the same size and thickness as the width of one satin pattern at appropriate intervals, and these rotating circumferential surfaces 6 are By rotating the tape running shaft 1 under pressure as in the first embodiment, a multi-strip satin pattern can be easily formed.

In the third embodiment, the tape running shaft 1 is pressed against the rotating circumferential surface 6 of the rigid rotating body 2 by pressing the rotating circumferential surface 1 of the rigid rotating body 8 having the same rotating circumferential surface 11 as the rigid rotating body 2.
Do it by 1. At this time, the suppression rigid rotary body 8 is rotatably supported by the pressure contact arm 4, and as the pressure contact arm 4 moves toward the rigid rotary body 2, the tape running shift 1 is moved with the rotating peripheral surface 11 to the hard rotary body. 2 rotating peripheral surface 6
It is used to press the As in the first embodiment, the material of the suppressing hard rotary body 8 may be a resin bond grindstone, a vitrified grindstone or a rubber bond grindstone, a metal bond type or resin bond type or an electroplated diamond wheel, a metal bond type or resin bond. Borazon CBN wheels, vitrified borazone grinding wheels, cemented carbide wheels whose circumferential surfaces are pre-formed in satin pattern by electric discharge machining, and circumferential surfaces of high-hardness special steel wheels which are pre-discharge-machined or dry or wet sandblast. A material formed into a satin pattern by processing may also be used.

Further, in this third embodiment, the tape running shaft 1 is placed between the rotating circumferential surface 6 and the pressing hard rotating body 8.
A supporting stand 9 is provided to place the tape running shaft 1 on the line between the center of the rotating body 8 and the center of the suppressing hard rotating body 8 and parallel to the axis of the rotating circumferential surface 6. It is arranged at a position in contact with the rotating body 8.

Next, in the fourth embodiment, the tape running shaft 1 is pressed against the rotating circumferential surface 6 of the hard rotary body 2 in an appropriate area around the rotating circumferential surface 6, and the radial dimension of this circumferential surface and the tape running shaft 1 is This is done using the pressure contact portions 12 of the seats 13 which are arranged in parallel with an interval of . The material of the pressure contact portion 12 of this catch seat 13 is as follows:
Like the hard rotating body 2 and press hard rotating body 8 of the first and third embodiments described above, a resin bond grindstone, a human refrigeration grindstone, a rubber bond grindstone, a metal bond type, a resin bond type, or a diamond material such as electrodeposition, Borazon CBN material such as metal bond type or resin bond type or electrodeposition,
If you use a vitrified borazone grindstone, a hard metal material whose surface has been previously formed into a satin pattern by electric discharge machining, or a high-hardness special steel material whose surface has been formed into a satin pattern by electric discharge machining or dry or wet sandblasting, it will be very effective. A good satin pattern can be obtained. Further, the seat 13 may be made of an elastic material such as hard rubber or synthetic resin, and in that case, the satin pattern is transferred to the tape running shaft 1 only by the hard rotating body 2. The pressure contact portion 12 is formed so as to be pressed in the direction of the hard rotating body 2 by the seat 13.

In this fourth embodiment, the tape running shaft 1 is fed into the gap between the hard rotary body 2 and the pressure contact part 12 so as to be parallel to the rotation axis 5 of the hard rotary body 2. Rotate body 2. Then, the rigid rotating body 20
Due to the rotation, the tape running shaft 1 is also rotated and rolls on the surface of the pressure contact portion 12 of the seat 13 and moves along the rotating circumferential surface 6 of the hard rotating body 2. At this time, the tape running shaft 1 rotates while being pressed against the rotating circumferential surface 6 of the hard rotating body 2 by the pressure contact portions 1 and 2, so that the matte pattern on the rotating circumferential surface 6 of the hard rotating body 2 and the press contact between the catch seat 13 The satin pattern of the portion 12 is transferred onto the circumferential surface of the tape running shaft. Then, as described above, the tape running shaft 1 is fed from one side of the gap between the hard rotating body 2 and the pressure contact portion 12 of the catch seat 13, and by the time it is fed from the other side, the transfer of the satin pattern has been completed. It is something that exists.

Furthermore, the fifth embodiment, as shown in FIGS. 5 and 6,
One rigid rotating body 2 is manufactured using the method shown in the first embodiment.
This makes it possible to simultaneously and continuously transfer a satin pattern onto a plurality of tape running shafts 1.

That is, for example, the conveying groove 16 of the conveying rotary plate 15, which conveys the tape running shaft 1 supplied from the shaft supply unit 14 to the position where it is brought into pressure contact with the hard rotating body 2 by the pressure contact arm 4, is 24I! Distribute them evenly. The shaft supply section 14 is connected to a conveyance rotary plate 15.
It is arranged above the conveyance grooves 16 and is formed so that the tape running shaft 1 can be simultaneously supplied to three adjacent conveyance grooves 16 among the conveyance grooves 16 . Further, the hard rotary body 2 is arranged to rotate concentrically with the conveying rotary plate 15 and to be able to come into contact with the circumferential surface of the tape running shaft 1 supplied to the conveying groove 16 on which the satin pattern is to be formed. has been done.

On the other hand, on the sides of the rigid rotating body 2 and the conveying rotary plate 15, three press-contact arms 4 which rotatably lock the guide roll 3 described above are disposed. As shown in FIG. 5, these three press-contact arms 4 are connected to a rigid rotary body 2 in order to press the tape running shaft 1 conveyed through the conveyance groove 16 on the side of the conveyance rotary plate 15 to the hard rotary body 2. With the guide rolls 3 approaching in two directions, every other conveying groove 1
They are arranged in sequence at position 6. Then, the conveyance rotary plate 15
The three pressure welding arms 4 are rotated intermittently by 45 degrees at a time, that is, by 16 portions of the three conveying grooves, and when stopped between these rotations, the three pressure welding arms 4
is brought close to the hard rotary body 2 so that the tape running shaft 1 is pressed against the hard rotary body 2.

Then, for example, the tape running shaft 1a in FIG.
is first brought into pressure contact with the rigid rotary body 2 by the pressure contact arm 4a, and then when the transport rotary plate 15 is rotated 45 degrees, the tape running shaft 1b is brought into pressure contact with the hard rotary body 2 by the pressure contact arm 4b.

When the transport rotary plate 15 is further rotated by 45 degrees, the tape running shaft 1C is brought into pressure contact with the rigid rotary body 2 by the pressure contact arm 4C.If this is repeated in sequence, the next tape drive shaft 1a is placed at the position of the pressure contact arm 4a. A corresponding tape running shaft 1 is located, a tape running shaft 1 corresponding to the next tape running shaft 1b is located on the pressure contact arm 4b, and a tape running shaft 1 corresponding to the tape running shaft 1C is also sequentially located, so that sequential feeding is performed. At each pressure welding arm 4
The tape running shafts 1 are brought into pressure contact with the rigid rotary body 2 at the same time at points a, 4b, and 4c.

In this way, the tape running shaft 1 pressed against the rigid rotating body 2 is sequentially sent downward as the conveying rotary plate 15 rotates, and the tape running shaft 1 is moved from the conveying groove 16 while the conveying rotary plate 15 rotates. The shaft holding plate 17 that holds the tape so that it does not fall falls and is discharged below the broken transport rotary plate 15, and at this time, the tape running shaft 1
A satin-finished pattern is transferred and formed at a predetermined position on the circumferential surface.

When enlarged as shown in FIG. 8, the satin pattern on the circumferential surface of the tape running shaft 1 formed in each of the above-described embodiments shows countless recesses formed by the unevenness of the rotating circumferential surface 6 of the rigid rotating body 2. 7, and this recessed portion 7 itself has fine irregularities, and the corners of each of the fine irregularities are sharply pointed to some extent. Therefore, these fine irregularities catch on the fine irregularities on the surface of the tee 1T, increasing the frictional force and eliminating slippage between the tape running shaft 1 and the tape T.

When we actually compare the usage conditions of the tape running shaft 1 with a satin pattern formed thereon and the tape running shaft 1 without a satin pattern formed thereon, we find that the tape running shaft 1 without a satin pattern 1, as shown in FIG. 11, after 30 minutes, a phenomenon occurs in which the audio frequency characteristic waveform 18 decreases considerably and the wow and flutter characteristic waveform 19 increases due to slippage between the tape running shaft 1 and the tape T. However, as shown in FIG. 12, the tape running shaft 1 with a satin pattern has almost no change in both the audio frequency characteristic waveform 20 and the wow and flutter characteristic waveform 21, and is capable of stable tape running. The results obtained were as follows. The tape used for this comparison was a tape that had been used for a long time, so that slipping between the tape running shaft 1 and the tape T was likely to occur. Since there is almost no change in the audio frequency characteristic waveform 20 and the wow and flutter characteristic waveform 21, the slip does not occur at all when a tape with a short usage time is used. Furthermore, as shown in FIGS. 10(a) to 10(d), if a matte pattern that is most suitable for the tape T is appropriately set, slip prevention will be more reliable.

As mentioned above, the time required to form the satin pattern can be extremely short because the tape is formed by rotating the tape running shaft 1 against the hard rotary body 2 and transferring the pattern. It is sufficient that the time for forming the satin pattern on the tape running shaft 1 is about 1 to 2 seconds to several seconds.

Further, when the hard rotary body 2 becomes worn, it is sufficient to regrind each of the above-mentioned grindstones, and since consumable tools and other consumables are hardly required, it can be formed at a very low cost.

[Effects of the Invention] According to the present invention configured as described above, in the process of finishing the surface of the tape running shaft 1 used in the tape drive structure of an apparatus for recording and reproducing audio or video onto a tape T, the rotating circumferential surface 6 is A hard rotary body 2 with a satin finish is arranged so as to be rotatable, and the surface of the tape running shaft 1 on which the satin pattern is to be formed is pressed against the rotating peripheral surface 6 of the rotary body 2, and the hard rotary body 2 is rotated. As a result, the satin pattern on the rotating circumferential surface 6 of the hard rotary body 2 is transferred to the circumferential surface of the tape running shaft 1, so that the satin pattern can be formed on the tape running shaft 1 in an extremely short time, and it also requires no consumable tools or tools. Almost no other consumables are required. In addition, since the work is simple, simply pressing the circumferential surface of the tape running shaft 1 against the rotating circumferential surface 6 of the hard rotary body 2, it can be easily automated and is extremely suitable for mass production. The manual process of forming the satin pattern, which was previously performed, is completely eliminated.

As described above, the hard rotary body 2 is used as a resin bond grindstone, a human rift grindstone, a rubber bond grindstone, a metal bond type, resin bond type, or electrodeposition diamond wheel, a metal bond type, resin bond type, or electrodeposition type borazone wheel. If formed using a CBN wheel, vitrified borazone grindstone, etc., the satin pattern will be formed by the concave portions 7 formed by pressure welding, so the fine irregularities will catch on the minute irregularities of the tape T, increasing the frictional force. This allows stable tape running with almost no slippage between the tape T and the tape running shaft 1.

As explained above, according to the present invention, an anti-slip satin pattern can be formed on the circumferential surface of the tape running shaft in a very simple process and in a short time, and almost no consumable tools or other consumables are required. In addition, it is very suitable for automation and mass production, and has various excellent effects such as being able to provide a tape running shaft that provides stable tape running at a low cost.

[Brief explanation of the drawing]

Figures 1 to 6 show an embodiment of the present invention, in which Figure 1 is a perspective view of the main part of the first embodiment, and Figure 2 is a perspective view of the main part of the second embodiment. , FIG. 3 is a perspective view of the main part of the third embodiment, FIG. 4 is a perspective view of the main part of the fourth embodiment, FIG. 5 is a partially cutaway front view of the main part of the fifth embodiment, and FIG. 7 is a perspective view showing an embodiment of the rigid rotating body, FIG. 8 is an enlarged sectional view of the main portion of the circumferential surface of the tape running shaft formed according to the present invention, and FIG. 9 is a side view of the main part. A perspective view showing the mounting state of the tape running shaft, FIG. 10 is an enlarged front view of main parts showing the contact state between the tape running shaft and the tape, and FIG. 11 shows the tape running shaft without a satin pattern formed on its surface. FIG. 12 is a waveform diagram showing the characteristics of the audio frequency and wow and flutter when using the tape running shaft shaped according to the present invention. . B...tape drive mechanism, M...servo motor, P
...Pinch roller-1■...Tape, 1...Tape running shaft, 1a...Tape running shaft, 1b
... Tape running shaft, 1c... Tape running shaft, 2... Hard rotating body, 3... Guide roll, 4
... Pressure contact arm, 4a ... Pressure contact arm, 4b...
Pressure contact arm, 4G... Pressure contact arm, 5... Rotation axis,
6... Rotating circumferential surface, 7... Concave portion, 8... Press hard rotary body, 9... Electrode, 10... Groove, 11... Rotating circumferential surface, 12... Pressure contact part, 13... Catching seat, 14... Shaft supply section, 15... Conveying rotating plate, 16... Conveying groove, 17... Si1? Foot holding plate, 18... Audio frequency characteristic waveform, 19... Wow and flutter characteristic waveform, 20
...Audio frequency characteristic waveform, 21...Wow and flutter
Characteristic waveform. Patent applicant: Sanwa Needle Bearing Co., Ltd. @Figure 1 Figure 2 Figure 3 @6v! J Figure 10 (a) (b) (/,)
'2) Figure 7) (O) Figure 1I Figure 12 Figure 8

Claims (1)

[Scope of Claims] 1. In the surface finishing process of a tape running shaft used in a tape drive mechanism of an apparatus for recording and reproducing audio or video on a tape, a hard rotating body with a satin-finished rotating circumferential surface is arranged to be rotatable for driving. A method for forming a satin pattern on the surface of a tape running shaft, characterized in that the surface of the tape running shaft on which the satin pattern is to be formed is pressed into contact with the rotating peripheral surface of the rotating body, and the hard rotating body is rotated. 2. The tape running shaft is pressed against the rotating peripheral surface of the hard rotating body while the tape running shaft is held parallel to the rotating axis of the hard rotating body by two rotatable guide rolls. A method for forming a satin pattern on the surface of a tape running shaft according to claim 1. 3. Pressure contact of the tape running shaft to the rotating circumferential surface of the hard rotating body is carried out using the rotating circumferential surface of a rotatable hard rotating body having the same rotating circumferential surface as the said hard rotating body. A method for forming a satin pattern on the surface of a tape running shaft according to claim 1. 4. The tape running shaft is pressed against the rotating circumferential surface of the hard rotating body by means of a catch that is arranged parallel to the rotating circumferential surface at an appropriate distance at a predetermined distance from the rotating circumferential surface. A method for forming a satin pattern on the surface of a tape running shaft according to claim 1. 5. Claim 1, 2 or 3, characterized in that the hard rotating body is formed by a range bonded grindstone.
The method for forming a satin pattern on the surface of a tape running shaft according to item 1 or 4. 6. The satin finish pattern on the surface of the tape running shaft according to claim 1 or 2 or 3 or 4, wherein the hard rotating body is formed of a vitrified grindstone or a rubber bond grindstone. Molding method. 7. The hard rotating body is made of a metal bond type, resin bond type, or electrodeposited diamond wheel, as set forth in claim 1, 2, 3, or 4. A method for forming a satin pattern on the surface of a tape running shaft. 8. Claim 1 or 2 or 3 or 4, characterized in that the hard rotating body is made of a metal bond type, resin bond type, or electrodeposited Borazon CBN wheel. A method for forming a satin pattern on the surface of a tape running shaft. 9. The method for forming a satin pattern on the surface of a tape running shaft according to claim 1 or 2 or 3 or 4, wherein the hard rotating body is a vitrified borazone grindstone. 10. Claims 1, 2, or 3, characterized in that the hard rotating body is made of a cemented carbide wheel whose circumferential surface has been previously formed into a matte pattern by electrical discharge machining. Alternatively, the method for forming a satin pattern on the surface of a tape running shaft according to item 4. 11. The hard rotating body is made of a high-hardness special steel wheel whose peripheral surface has been previously formed into a satin pattern by electrical discharge machining or dry or wet sandblasting. The method for forming a satin pattern on the surface of a tape running shaft according to item 2, 3, or 4. 12. The method for forming a satin pattern on the surface of a tape running shaft according to claim 4, wherein the press-contact portion of the catch is formed using a resin bonded grindstone. 13. The method for forming a satin pattern on the surface of a tape running shaft according to claim 4, wherein the press-contact portion of the catch is formed of a vitrified grindstone or a rubber bond grindstone. 14. The method for forming a matte pattern on the surface of a tape running shaft according to claim 4, wherein the pressure contact portion of the catch is made of a metal bond type, resin bond type, or electrodeposited diamond grindstone. 15. The method for forming a matte pattern on the surface of a tape running shaft according to claim 4, wherein the pressure contact portion of the catch is made of a metal bond type, resin bond type, or electrodeposited Borazon CBN material. . 16. The method for forming a satin pattern on the surface of a tape running shaft according to claim 4, wherein the pressure contact portion of the catch is made of a vitrified borazone grindstone. 17. The matte finish on the surface of the tape running shaft as set forth in claim 4, wherein the pressure contact portion of the catch is made of a cemented carbide surface which has been previously formed in a matte finish by electrical discharge machining. Pattern forming method. 18. Claim 4, characterized in that the pressure contact portion of the catch is made of a high-hardness special steel material whose surface has been previously formed into a matte finish by electrical discharge machining or dry or wet sandblasting. A method for forming a satin pattern on the surface of a tape running shaft. 19. The method for forming a satin pattern on the surface of a tape running shaft according to claim 4, wherein the pressure contact portion of the catch is made of an elastic material such as hard rubber or synthetic resin.