JPH02232852A - Tape guide device - Google Patents

Abstract

PURPOSE:To improve the traveling of a tape by forming a cut-out part which extends perpendicularly to the longitudinal direction of a tape guide part in a holder part, making the width of the cut-out of the cut-out part variable and providing a means for adjusting the tape guide part so that it can freely incline back and forth. CONSTITUTION:The notched parts 13a and 13b having circular tip parts are formed in the upper and lower parts of a boundary between the tape guide part 11 and the holder part 12, and the triangular notched part 13c is formed in the center part of the boundary. A laminated ultrasonic vibrator 14 for causing standing wave vibration in the guide part 11 is interposed perpendicularly to the longitudinal direction of the guide part 11 in the notched part 13c. The cut-out part 12a having circular tip part which extends to the vicinity of the notched part 13b perpendicularly to the longitudinal direction of the guide part 11 is formed in the lower part of the holder part 12. A tapped hole 12d is formed in the holder part below a through hole 12c and a hexagon socket adjusting bolt 15 is screwed there from the upper surface 12b of the holder part 12. The width l of the cut-out of the cut-out part 12a is varied by the screwing quantity of the bolt 15, so that the guide part 11 freely inclines at a fine angle in a back-and-forth direction.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a tape that reduces the coefficient of friction of a tape guided by a tape guide section and allows easy adjustment of the inclination of the tape guide section. This invention relates to a guide device.

[Summary of the Invention] The present invention provides a tape guide device that reduces the coefficient of friction between the tape guided by the tape guide portion and the tape guide portion by directly applying ultrasonic vibration to the tape guide portion. The tape guide section has a tape guide section that guides the tape, and a holder section that maintains the posture of the tape guide section, and an ultrasonic vibrator that generates standing wave vibration is attached to the tape guide section, and A notch extending perpendicularly to the longitudinal direction of the tape guide is formed in the holder, and the width of the notch is varied to adjust the tape guide so that it can be tilted back and forth. By providing this, it is possible to generate standing wave vibrations in the tape guide section to reduce the coefficient of friction of the tape as much as possible, further improving tape running performance, and to adjust the inclination of the tape guide section. There are some that allow for easy tilt adjustment and height adjustment.

[Prior Art] The applicant has developed a video tape recorder (VTR) in which the coefficient of friction of the magnetic tape guided by a tape guide is reduced.
) was disclosed in Japanese Patent Application No. 185242/1983. To explain this in detail with reference to FIGS. 4 to 6, 10G represents the output of the rotary head drum 9l of the open-reel video tape recorder 90 shown in FIG.
These are slide-type tape guide devices placed on the entrance side.

This tape guide device 100, as shown in FIG.
A cylindrical tape guide 101 that guides the magnetic tape 92 in the tape running direction, a holder 102 that vertically attaches and fixes this tape guide 101 on the tip 102a,
A laminated ultrasonic transducer 103 is attached to a notch 102b formed in a U-shape in the middle of this holder 102 so as to be parallel to the longitudinal direction of the holder 102.
It is made up of.

As shown in FIG. 5, the tape guide 101 is vibrated in the direction of arrow b by the vibration of the ultrasonic transducer 103 in the direction of arrow a, thereby increasing the coefficient of friction (so-called adhesive force) of the magnetic tape 92 against the tape guide 101. ) is made small in order to improve the stability of the tape running system.

[Problems to be Solved by the Invention However, the tape guide device 100 of the above-mentioned prior art
Since the tape guide 101 is indirectly vibrated via the holder 102, there is a large transmission loss of the vibration energy generated by the ultrasonic vibrator l03, and the coefficient of friction of the magnetic tape 92 against the tape guide 101 is minimized. It has been pointed out that the effect of sufficiently stabilizing tape running cannot be expected as much as expected. Furthermore, since the vibrations applied to the tape guide 101 are non-standing waves, the vibrations tend to vary;
It is difficult to cause the tape guide 101 to resonate together with the magnetic tape 92, and together with its low attenuation characteristics, it is difficult to obtain stable tape running.

In particular, these phenomena are remarkable in the so-called inclined guide type tape guide device that is placed at the entrance and exit of the rotating head drum of the helical scan method. It has been desired to develop a tape guide device with an inclined guide, which can easily adjust the inclination of a tape guide arranged in an inclined position at the entrance/exit of a head drum.

SUMMARY OF THE INVENTION Accordingly, the present invention provides a tape guide device that is capable of stabilizing tape running by causing the tape to resonate with a tape guide section, and that also allows easy adjustment of the inclination of the tape guide section. .

[Means for Solving the Problems] An ultrasonic vibrator that has a tape guide section that guides the tape and a holder section that maintains the posture of the tape guide section, and that generates standing wave vibration in the tape guide section. While attaching the holder, a notch extending perpendicularly to the longitudinal direction of the tape guide part is formed in the holder part, and the width of the cutout part is varied so that the tape guide part can be tilted back and forth. Adjustment means are provided.

[Function] Since the tape guide portion that guides the tape is directly vibrated by the ultrasonic vibrator, vibrations due to standing waves are generated in the tape guide portion, and the tape guide portion is moved in the radial direction of the tape guide portion. Easily resonates with tape. Therefore, the coefficient of friction of the tape with respect to the tape guide portion becomes as small as possible, and the tape runs more stably.

Further, the inclination and height adjustment of the tape guide section can be easily performed by tilting the tape guide section in the front-rear direction by varying the notch width of the notch formed in the holder section using an adjusting means. .

[Example] Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

1st. In Fig. 2, numeral 10 denotes a tape guide device, which is of an inclined fixed guide type and slide type, which is disposed at the exit and entrance of the tape running system of the rotary head drum 1 of the helical scan type VTR shown in Fig. 3. be. A semi-cylindrical tape guide section 1l that guides the magnetic tape 2 of the tape guide device 10 and a substantially rectangular parallelepiped holder section l2 that maintains the upright posture of the tape guide section 11 are integrally formed into metal blocks. It is formed into a shape.

At the upper and lower parts of the boundary between the tape guide part 1l and the holder part 12, there are notches 13a, 13 having circular tips.
b, and a triangular notch 13C is formed at the center of the boundary. This notch 13c (
Tape guide part [between the back of 1 and the front of holder part l2]
A laminated ultrasonic transducer l4 that generates standing wave vibration in the tape guide part 11 is interposed within the tape guide part 11 so as to be perpendicular to the longitudinal direction of the tape guide part l1.

At the lower part of the holder part l2, the tape guide part 1 is provided.
A notch 12a is formed with a circular tip extending perpendicularly to the longitudinal direction of the cutout 1 to the vicinity of the notch 13b.

Further, a through hole 12C is formed from the upper surface 12b on the back side of the holder portion 12 to the notch 12a so as to be perpendicular to the notch 12a.
A screw hole 12d is formed in the holder portion l2 below c. A hexagonal hole-shaped adjustment bolt (
Adjustment means) 15 is inserted and screwed together. Depending on the screwing amount of this adjustment bolt l5, the cutting arrow part 1 of the holder 12
The tape guide part 11 is made by varying the notch width g of 2a.
can be tilted at a slight angle in the front and rear directions.

The ultrasonic transducer l5 is formed by laminating a plurality of piezoelectric elements, and is placed between the back surface of the tape guide portion l1 forming the cutout portion taC and the front surface of the holder portion l2 in the axial direction (longitudinal direction) of the tape guide portion 11. It is mounted perpendicular to the

The holder 12 is mounted on the rotary head drum l which is tilted at a predetermined angle during so-called M loading of the magnetic tape 2.
The slider 3 is tilted at a predetermined angle and erected on the slider 3 that slides around the slider 3.

According to the tape guide device 10 of the embodiment described above, the laminated ultrasonic transducer l is attached approximately at the center of the tape guide part 11 perpendicularly to the longitudinal direction of the tape guide part l1.
4, the vibration is directly applied to the tape guide part 1 by generating standing wave vibration in the tape guide part l1.
1 can be easily caused to resonate with the magnetic tape 2 in the radial direction of the tape guide section 11. As a result, the resonant frequency of the tape guide section 11 of the laminated ultrasonic transducer 14 can be made higher than that of the prior art. Therefore, the adhesion force of the magnetic tape 2 to the outer peripheral surface of the tape guide section 11 can be made as small as possible, that is, the friction coefficient of the magnetic tape 2 with respect to the tape guide section 11 can be made as small as possible. This makes it possible to further stabilize and improve the running of the magnetic tape 2 in the tape running system.

Furthermore, since the tape guide portion l1 is directly vibrated by the laminated ultrasonic vibrator l4, approximately 100% of the vibration energy generated by the laminated ultrasonic vibrator 14 is
can be used to excite the tape guide section 11, resulting in very little energy loss and very high efficiency.

Furthermore, when the resonant frequency is made higher, the heat generated by the laminated ultrasonic transducer 14 is removed from the metal holder part.
Since the magnetic tape 2 can easily escape to the outside air from each side of the magnetic tape 12, damage such as deformation of the magnetic tape 2 due to heat can be reliably prevented. In addition, the above-mentioned laminated ultrasonic transducer l4 is placed in the holder l.
Since there is no need for a special member for mounting the ultrasonic transducer 14 in the notch 13c that cuts into the second side, the entire device can be made lighter and smaller.

The inclination angle between the rotating head drum l and the magnetic tape 2 is determined by the amount of screwing the adjustment bolt 15 into the threaded hole 12d of the holder part 12.
It can be easily adjusted by varying the width e of the notch 2a, tilting the upper part of the tape guide portion 1l in the front-rear direction, and changing the angle of inclination.

According to the embodiment described above, the tape guide device of the inclined guide type disposed at the exit and entrance of the rotary head drum 1 has been described, but the tape guide device of the inclined guide type disposed at the exit and entrance of the rotary head drum 1 has been described. It may also be applied to a fixed guide type tape guide device. Further, although the description has been made regarding the case where the present invention is applied to a VTR, the present invention is not limited to this, and can be applied to various recording/reproducing apparatuses and information processing apparatuses such as tape recorders.

Further, in the above embodiment, the tape guide part that guides the tape and the holder part that holds the tape guide part are formed by integral molding, but the invention is not limited to this.
Of course, a cylindrical or cylindrical tape guide part formed separately from the holder part may be fastened and fixed by fastening means such as screws.

[Effects of the Invention] As described above, according to the present invention, since the tape guide portion that guides the tape is directly vibrated by the ultrasonic vibrator, standing wave vibrations are generated in the tape guide portion. The tape guide portion can be easily caused to resonate with the tape in the radial direction of the tape guide portion. Therefore, the coefficient of friction of the tape with respect to the tape guide portion can be made as small as possible, and the running of the tape can be further improved.

In addition, an adjustment means is provided in the holder section that maintains the attitude of the tape guide section, and the notch width of the notch formed in the holder section is varied so that the tape guide section can be freely tilted in the front-rear direction. Adjustments such as the inclination of the tape guide section can be easily made.

[Brief Description of the Drawings] Fig. 1 is a perspective view showing a tape guide device according to an embodiment of the present invention, Fig. 2 is a side view showing a part of the tape guide device in cross section, and Fig. 3 is a tape guide device according to an embodiment of the present invention. Schematic plan view of a helical scan type tape running system to which a guide device is applied, No. 4
The figure is a perspective view of a prior art tape guide device, FIG. 5 is a plan view of the same device, and FIG. 6 is a schematic plan view of a VTR to which the same device is applied. 2...Tape, 10...Tape guide device, 11.
...Tape guide part, 12...Holder part, 12a.
... Notch portion, 14... Ultrasonic vibrator, 15... Adjustment bolt (adjustment means), i... Notch width. 2-111 Tee 7° perspective view Partially shown in cross section t Side view Figure 2 Helical scan or second Tee 7° travel f Y diagram schematic diagram Figure 3 Figure 5

Claims (1)

[Claims] (1) It has a tape guide section that guides the tape, and a holder section that maintains the posture of the tape guide section, and an ultrasonic vibrator that generates standing wave vibration is attached to the tape guide section, and the holder A notch extending perpendicularly to the longitudinal direction of the tape guide part is formed in the part, and adjustment means is provided for adjusting the width of the notch so as to freely tilt the tape guide part forward and backward. A tape guide device featuring: