JPS60124051A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To decrease the friction of a tape running system and to decrease wear of the tape by coating a thin layer consisting of the carbide, nitride, etc. of group, IVa, group Va or group VIa elements of the periodic table on the sliding contact surface of a magnetic tape consisting of a prescribed member among respective members constituting the magnetic tape running system. CONSTITUTION:A tape 10 emitted from a supply reel 12 in a cassette 11 arrives at a take-up reel 31. For example, a tension post 15, an inclined post 17 and an inclined post 23 among respective members in the above-mentioned tape running system are formed by coating a thin layer of titanium nitride (TiN) as a material corresponding to any of the carbide, nitride or carbonitride of IVa group, Va group or VIa group elements of periodic table on the outside circumferential surface (surface in sliding contact with the tape) of the base material made of a stainless steel. A drum 22 is formed by coating a thin layer of the above-mentioned titanium nitride on the outside circumferential surface of the drum-shaped aluminum alloy base material similar to the conventional device.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a magnetic recording and reproducing device used in a video tape recorder (hereinafter abbreviated as VTR) and the like.

[Prior art]

In recent years, the technology related to RA magnetic recording and reproducing devices has made remarkable progress, particularly in the field of VTR technology. In this situation, the current VTR systems are VH8 system, β
method, V-2000 method (compatible with jCVC method etc. 1)
1 (if existing J,
J, li is affected. This creates an inconvenient problem of confusion on the user's side. Regarding the so-called 8 mm VTR, which is being developed as the next-generation +W type among the above-mentioned blue video cameras, we have heard from various manufacturers whether there is a complete standardization of the standard.
The magnetic tape used in VTRs is metal tape or vapor-deposited tape. When these metal tapes are used, the magnetic tape running system (1y, simply referred to as tape) can be used with conventional VTRs of various types. If the configuration is similar to that adopted in , the metal tape causes significant wear on various parts of the tape running system.

On the other hand, when a vapor-deposited tape with a thin film thickness and relatively low mechanical strength is used, various other problems arise. That is, in the same way as before, for example, by using a fixed boss made of stainless steel U4 or a rotating drum made of aluminum,
When winding tape around a rotating drum, if the tape running system is configured with the angle set at 210°, the tape may stick to the fixed post or the circumferential surface of the rotating drum, or the tape may cause friction with the fixed post or the circumferential surface of the rotating drum. As the coefficient increases, the tape running speed becomes uneven, and as a result, the reproduced image deteriorates. Such problems become particularly noticeable when the device is used in a humid atmosphere. This problem of insertion in a humid atmosphere is also disclosed in JP-A-58-98868 as a general problem with VTRs.
A tentative solution is also presented. This is because the surface of the tape running member is coated with higher fatty acids, such as stearic acid,
Examples of higher fat III salts include zinc stearate, higher fatty acid amides such as stearic acid amide, and reactive organic amides such as silane coupling agents.
Reactive titanium, such as organic titanate ester, is dissolved in a solvent, and the above-mentioned pieces are immersed in a treatment solution adjusted to about 1% per volume at a time, and then dried with high-speed hot air. A thin IIUM made of the above substance is formed on the surface of the above member so that the above member has 151 aqueous property. However, the thin film layer produced by the method disclosed above cannot withstand wear caused by running the tape for a long period of time and is therefore impractical.

[Purpose] The purpose of the present invention is that even when a magnetic tape, such as a vapor-deposited tape, is difficult to run, the coefficient of friction in the tape running system is small, and the tape running speed becomes uneven and the tape runs smoothly. The tape does not stick to the material of the running system, there is little damage to the tape, and the tape has good running characteristics as described above even in a humid atmosphere. It is an object of the present invention to provide a magnetic recording/reproducing device in which damage to a tape running system can be suppressed even when a magnetic tape which has a large effect of abrading the system is used.

〔overview〕

In order to achieve the above object, the present invention is characterized by the following configuration. At least the magnetic tape sliding contact surface of a predetermined member such as a rotary drum, back tension post 1, or fixed post, such as the back of each member constituting the magnetic tape running system, is adjusted according to IV a of the periodicity table. The present invention is characterized in that a thin layer of carbide, nitride, or carbonitride of a group Va, group Va, or group Vla element is formed on the base material of the predetermined member.

〔Example〕

The present invention will be clarified by describing embodiments of the present invention in detail below using the drawings.

FIG. 1 is a system diagram showing a tape running system in an embodiment of the present invention. In FIG. 1, tape 10 is cassette 1
1 from the supply reel 12, and takes the following route.

Cassette inner post 13→cassette inner post 146-→tension boss]・15→rotating roller 16→inclined boss 17→rotating roller 18→tape reader 19→full width erasing head IS20→Dave mand 21−→drum 22→inclined boss 23 → audio erase l\tsut 24 → Δ-diocon i roll head 25 → boss 26 ~ shift stand 27 → pin 10-ra 28 → to cassette 1 inner post 2
9 → Cassette 1 to inner boss 30.

The take-up reel 31
It will lead to the end.

In this embodiment, among the members in the tape running system described above, for example, the tension post 15. Inclined posts 17 and inclined bosses] - 23 are made of stainless steel base material having a material of group IVa, group Va or VT of the periodic table on the outer circumferential surface (tape sliding surface).
ab\=It is formed of a thin layer of titanium nitride (TiN), which is a substance corresponding to any of the element carbides, nitrides, or carbonitrides. The drum 22 is formed by coating the above-mentioned thin layer of titanium nitride on the outer peripheral surface of a drum-shaped base material made of aluminum, similar to the conventional apparatus of this type. To form these thin layers, it is preferable to apply a method in which the above-mentioned substance is deposited on the surface of the fl material by physical vapor deposition (PVD) or chemical vapor deposition (C:VD). According to experiments by the inventors, the Pickers hardness (Hv) of the TiNfW layer formed by applying the PVD method was 2000.
It has been confirmed that this is a degree or more.

In the device of the present invention having the above-mentioned configuration, the conventional 5US30
Instead of the tension post or inclined boss mill, etc., which are made entirely of stainless steel such as No. 3, the boss 1 is made of a material such as stainless steel with a thin layer of TiN formed on the outer surface thereof. Therefore, even if the angle at which the tape is wrapped around these posts is too large, the corresponding boss]
The coefficient of friction in the periphery is low, and wear on both the post and tape is extremely low. In conventional devices of this kind, the sum of the tape winding angles around both inclined posts (corresponding to the inclined posts 17 and 23 of the present invention) is about 1000, and the frictional resistance or The static friction force between the post circumferential surface and the tape surface became extremely large, causing problems such as uneven tape running speed and significant wear on both the post and tape, but these problems have been eliminated by the present invention. . Furthermore, in the embodiment of the present invention shown in FIG. 1, f! For example, since the drum is coated with TiN, the same problem as with the post in J above, which occurs regarding friction between the outer peripheral surface of the drum (tape sliding surface) and the tape surface, is completely solved.

FIG. 2 is a system diagram showing a measurement system for measuring the coefficient of friction in the tape running system of the apparatus of the present invention.

In FIG. 2, a magnetic tape 100 is connected to a supply reel 10.
1 → Fixed post 102 → Guide roller 103 → Fixed boss i ~ 104 → Trial lever (drum or post) 200 → Tension analyzer post 106 → Fixed post 107 → Capstan 108 and pinch roller 109 → Guide roller 110 → Fixed post 111 → The winding reel 112 is stretched in this order. Tension analyzers 121 and 122 each have a tension gauge corresponding to the tension analyzer bosses 9-1 to 105 and 106, respectively.
are connected, and these tension analyzers 121.12
2 are connected to signal conversion circuits 131 and 132, respectively. The outputs of each signal conversion circuit 131 and 132 are input to a pupil calculation circuit 140. The tension analyzer posts 105 and 106 are configured so that the distance between them can be changed to be wider or narrower,
This allows the tape 100 to be wrapped around the sample 200 at different angles. To measure the friction coefficient μ of the sample 200 using the measurement system shown in FIG. 2, the capstan 108 is rotated and the pinch roller 1091. : Tape 100 that is more sandwiched
is run at a predetermined angle, and the tension analyzer 121 detects the tension T1 of the tape facing the sample F4200, and the tension analyzer 122 detects the tension T2 of the tape moving away from the sample 200.

Then, through the signal conversion circuits 131 and 132 and the calculation circuit 10-circuit 1/IQ, the calculation is performed as follows: u=I n (T2.'TI), ,'θ (θ is an angle of tape wrapping), and the value of the friction coefficient ll is calculated. Melt. When measuring the coefficient of friction It under conditions of predetermined temperature and humidity, the measuring system shown in FIG. 2 is placed in a constant humidity chamber B for measurement.

Figure 3(a), (1)) d5 and Figure 4(a).

(b) is the 31-measurement system (, 2-1) shown in Figure 2, respectively.
This figure shows the results of measuring the friction coefficient μ of the sample drum circumferential surface and recording it on a recorder. In each figure,
The horizontal axis is the time axis, and the vertical axis corresponds to the friction coefficient μ. The measurement conditions and general support posts at d3 in each figure are summarized in the table below. However, in each of the above measurements, a vapor-deposited tape (with CON i vapor-deposited on a base) having a thickness of approximately 10 μm and a width of 8 mm was used as the magnetic tape.

-11- 19- (Effects of the Invention) According to the present invention, even when a type of tape that is thin and tends to stick to the tape running system, such as a vapor-deposited tape, stickiness does not occur and the friction of the tape running system is reduced. The coefficient is small and good running characteristics are ensured.In addition, regardless of the type of tape to which it is applied, there is little friction in the tape running system (tc), so there is little wear on the tape, and there is also extremely little wear on the tape running system itself. Further, even in a humid atmosphere, the tape does not stick, and the tape running system maintains an ideal state with a small coefficient of friction.

[Brief explanation of the drawing]

Fig. 1 is a system diagram showing a tape running system of an embodiment of the present invention, Fig. 2 is a system diagram showing a visual measurement system for measuring the coefficient of friction in the tape running system of the apparatus of the present invention, and Fig. 3 ( a), (b) and FIGS. 4(a), (b) are diagrams showing the results of recording the friction coefficients measured by the measuring system of FIG. 2 on a recorder, respectively. 10.100...Mouth 1 air tape, 1.3, 14.29
゜13-1 z-30...Bost in the cassette. 15... Tension post, 17.23... Inclined boss h, 22... Drum, 26... Post, 105.106... Tension analyzer post, 121.122... Tension analyzer, 131. 132...signal conversion circuit, 140
...Arithmetic circuit, 200...Sample. 14- Mr. Kazuo Wakasugi, Commissioner of the Patent Office1. Display of the case Japanese Patent Application No. 58-232288 3, Person making the amendment Relationship with the case Patent applicant name (037) Olympus Optical Industry Co., Ltd. 4, Agent specification 5 Engraving of drawings (no change in content) Procedural amendment Book 6Q, 3. -3 Showa year, month, day 1, Indication of the case Patent application No. 58-232288 2, Name of the invention Magnetic recording and reproducing device 3, Person making the amendment Relationship to the case Patent applicant (037) Olympus Optical Industry Co., Ltd. 4, Agent 7, contents of amendment (1) Amend the scope of claims as shown in the attached sheet. (2) In the 17th line of page 3 of the specification, ``(hereinafter simply referred to as tape)'' is corrected to ``1'' (hereinafter simply referred to as tape running system)''. (3) Insert the word "alloy" next to "aluminum" on page 4, line 4 of the same book. (/4) Correct [φ-110 mmJ in page 4, line 5 of the same book to [diameter φ=40#J. (5) In the same book, page 5, line 4, "immersion" is corrected to "immersion." (6) “Periodic rate table” on page 6, line 8 of Domon is “periodic table”
I am corrected. (7) After “1 Aluminum” on page 7, line 18 of the same gate, “
Insert the word "Alloy". (8) "1 bit force hardness" in line 4 of page 8 of the same book is corrected to "Vickers hardness". (9) Correct "periphery" in line 13 of page 8 of the same gate to "surrounding surface." (10) “Aluminum” in the same book, page 9, lines 4 to 5
Insert the word "alloy" after . (11) In the same book, page 9, line 5, ``1 coated'' is corrected to ``coated.'' (12) “Fixed post 104→” in page 9, line 15 of the same book
Insert the phrase [tension analyzer post 105→j next to . (13) On page 11, line 14 of the same book, support value 1 is corrected to "indication value." (14) The table on page 12 of the circular is corrected as follows. Note 4-2, Claims (1) In a magnetic recording and reproducing apparatus having a magnetic tape running system extending from a tape supply side to a tape winding side, a predetermined number of members of each member constituting the magnetic tape running system is provided. (
In both cases, the sliding contact surface of the magnetic tape is formed by coating the base material of the predetermined member with a thin layer made of carbide, nitride, or carbonitride of an element of Group A, Group Va, or Group Vla of the periodic table. 1. A magnetic recording and reproducing device characterized in that: (2) The magnetic recording and reproducing apparatus according to claim (1), wherein the predetermined member is a drum on which the magnetic tape is wound and run over a predetermined angle. (3) The magnetic recording and reproducing apparatus according to claim (2), wherein the drum is a rotating drum made of aluminum alloy. (4) The predetermined member is a pack tension post. The fixed post or both claims (
1) The magnetic recording and reproducing device described in item 1). (5) The magnetic recording and reproducing device according to claim (4), wherein at least one of the pack tension post and the fixed 1-post is made of stainless steel and has a cylindrical shape. (6) The magnetic recording/reproducing device according to any one of claims (1) to (5), wherein the thin layer is made of titanium nitride. (7) The magnetic recording/reproducing device according to any one of claims (1) to (6), wherein the thin layer is formed by coating the base material by a physical vapor deposition method. (8) The magnetic recording/reproducing device according to any one of claims (1) to (6), wherein the thin layer is formed by cordoning the material by chemical vapor deposition. Applicant's agent Patent attorney Jun Tsuboi 2-

Claims (8)

[Claims] (1) In a magnetic recording and reproducing apparatus having a magnetic tape running system extending from the tape supply side to the tape winding side, at least the magnetic tape sliding surface of a predetermined member of each member constituting the magnetic tape running system has a periodicity. Rate table IV group a, V
A magnetic recording/reproducing device characterized in that the base material of the predetermined member is coated with a thin haze of carbide, nitride, or carbonitride of a group a or group VI a element. (2) The magnetic recording and reproducing apparatus according to claim (1), wherein the predetermined member is a drum on which the magnetic tape is wound and run over a predetermined angle. (3) The magnetic recording/reproducing device according to claim (2), wherein the drum is a rotating drum made of aluminum. (4) The predetermined member is attached to the pack tension boss 1. The fixed post or both claims (
The magnetic recording/reproducing HM described in section 1). (5) The magnetic recording and reproducing device according to claim (4), wherein at least one of the pack tension post and the fixed post is made of stainless steel and has a cylindrical shape. (6) The magnetic recording/reproducing device according to any one of claims (1) to (5), wherein the thin layer is made of titanium nitride. (7) The magnetic recording/reproducing device according to any one of claims (1) to (6), wherein the thin layer is formed by coating the material by physical vapor deposition. (8) The thin film is coated onto the base material by chemical vapor deposition method.
- A magnetic recording/reproducing device according to any one of claims (1) to (6).