JP2601891Y2 - Roller guide for tape running - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION This invention is based on a rotary digital audio tape recorder (R-DAT) or 8 digital audio tape recorder.
The present invention relates to a tape guide roller guide for smoothly running a tape in a millimeter video tape recorder (8 mm VTR) or the like.

[0002]

2. Description of the Related Art For example, a tape used for R-DAT has a narrow width of 3.81 mm and has a high buckling strength despite its extremely low rigidity in a bending direction, so that it is not curled by guiding. is there.

[0003] R-DAT employs a helical scan system in which a tape is wound 90 degrees around an inclined rotating drum. Therefore, when viewed from the rotating drum side, the direction and height of the tape must be always at the entrance and exit of the rotating drum. Are different.

The direction and height of the tape are corrected by, for example, as shown in FIGS. 2 and 3, the fixed guide 1, the ten regi (tension regulator) 2, the fixed guide 3, the roller guide 4, and the inclined guide 5 on the tape outward path. Is implanted in the mechanical chassis 6, and the inclined guide 7, the return guide 8, the fixed guide 9, the capstan 10, the swing guide 11, and the fixed guide 12 are implanted in the mechanical chassis 6 on the tape return path side.

The tape 15 pulled out of the cassette 14 set in the hubs 13 and 13 alternately passes through guides on the tape outward path, and rotates the recording / reproducing rotary drum 16.
After being slid in contact with the tape for 90 degrees, the tape is wound around the cassette 14 alternately through guides on the tape return path side. Reference numeral 17 denotes a pinch roller for driving the tape, which is provided opposite to the capstan 10.

The roller guide 4 (the folding guide 8 also has the same shape as the roller guide 4 and is symmetrically disposed with the drum 16 interposed therebetween) is provided with a male screw on the lower small diameter portion as shown in the conventional example of FIG. A shaft 41 on which a shaft 41a is engraved;
1 and an upper flange 42 fixed to the upper end of
And a lower flange 44 fixed to the shaft 41.

The shuttle 20 is mounted on a slide plate 24 connected to an arm 23. The boss 21 has a fitting step portion 21c formed at its lower portion, and a hole 2 for supporting the shaft 41 of the tape running roller guide 4 at the center thereof.
1a is drilled to the vicinity of the lower part, and a female screw 21b for screwing the male screw 41a of the shaft 41 is formed on the extension thereof.

The shaft 41 of the roller guide 4 is
The male screw 41a at the lower end is screwed into the female screw 21b engraved on the boss 21 after being inserted into the hole 21a of the boss 21 press-fitted into the shuttle 20 and lightly fixed with a set screw 22 from the side surface.

The roller guide 4 includes a shuttle 2 together with an inclined guide 5 (the same applies to the inclined guide 7 on the return guide 8 side).
0.

A slide plate 24 is slidably fitted in a loading slide groove (not shown), and is moved by an arm 23.

As described above, the boss 21 is used as a positioning member in the conventional tape running roller guide 4.

The boss 21 has a hole 21a (for example, 1.5 mm in diameter) for supporting the shaft 41 of the tape running roller guide 4 as described above, and has a smaller diameter (for example, 1.4 mm in diameter) than the hole 21a. Since the female screw 21b) is engraved, processing is difficult, and defective products are easily formed.
There were problems such as a high manufacturing unit price.

[0013] As a solution to the above-mentioned problem, Japanese Utility Model Application No. 2-22515 (Japanese Utility Model Application Laid-Open No.
In the roller guide for tape running according to the known invention of No. 115930), it is proposed that a female screw for shaft screwing is always engraved on a slide plate to be used together without complicated processing for screwing a shaft to a small boss. I have.

FIG. 5 shows this state. In FIG. 5, the shaft 41 of the roller guide 4 is
After being pierced through the hole 21a of the boss 21 press-fitted into the boss 21 and being lightly fixed with a set screw 22 from the side surface, the hole 21a of the boss 21 is
Threaded male screw 41a passes through stepped hole 20a,
The shaft 41 is erected with its height adjusted by screwing into a female screw 24b engraved on the receiving seat 24a of the slide plate 24.

Another solution to the problem of the prior art shown in FIG. 3 is Japanese Utility Model Application No. 2-225 filed earlier by the present applicant.
In the roller guide for tape running according to the known invention of No. 16 (Japanese Utility Model Laid-Open No. 3-159931), a hole for supporting the shaft of the roller guide is formed in the shuttle body without using a boss and a set screw, and the shaft is screwed together. It has been proposed to fix the nut to the lower part of the shuttle by a square fitting or the like.

FIG. 6 shows this state. In FIG. 6, the shaft 41 of the roller guide 4 is
The height of the shaft 41 is adjusted by screwing a male screw 41a that is inserted into the hole 20a of the No. 0, penetrates the hole 20a, and protrudes from the hole 20a into the nut 25 squarely fitted to the lower surface of the shuttle 20. It is erected in the state where it was set.

[0017]

However, according to these conventional arrangements, the roller guide 4 is attached at an angle as described later, or rattling occurs due to insufficient fixing of the shaft 41, as will be described later. In some cases, the rotation of the roller guide 4 may be poor.

That is, in FIGS. 4 and 5, the shaft 41 supported in the hole 21a is lightly fixed with the set screw 22 from the side of the boss 21, and the male screw 41a at the lower part of the shaft is provided.
Is screwed into the female screw 21b (see FIG. 4) or the female screw 24b (see FIG. 5). In FIG. 6, the male screw 41a of the shaft 41 projecting from the hole 20a is screwed into the nut 25. Therefore, if there is a clearance (a clearance between the hole diameter and the shaft diameter) exceeding the specified value, the set screw 22 is removed.
If the roller guide 4 is tilted more than necessary due to the tightening, or if the nut 25 is loosely inserted into the shuttle 20, the roller guide 4 will be insufficiently fixed and rattling will occur, or the shaft 41 will not be able to rotate properly. There was a case. Therefore, the shaft 41 cannot be supported on the shuttle 20 with high accuracy, and the use of the boss 21 and the set screw 22 causes problems such as an increase in the number of parts and an increase in the number of assemblies.

Also, after the roller guide 4 is mounted, the screw portion may be loosened to cause these problems.

The height of the portion of the roller guide 4 that supports the shaft 41 is the height of the shuttle 20 in FIGS.
In order to screw the set screw 22 in addition to the thickness of the boss 2,
1 also requires a certain thickness. Even in FIG. 6, in order to firmly fix the shaft 41, it is necessary to increase the thickness supporting the shaft 41 to some extent, and furthermore, the thickness of the nut 25 is required. The thinning of the shuttle 20 to be supported was hindered.

This invention has been made in view of the above points, and the shaft of the tape guide roller guide is press-fitted and fixed to the shuttle body, and the tip of the shaft is attached to the slide plate, so that the roller guide can be formed with high accuracy. An object of the present invention is to provide a roller guide for running a tape which can be securely fixed, has few parts, is easy to process, and can be mass-produced at low cost.

[0022]

According to the present invention, an upper flange and a lower flange fixed to a shaft, a roller rotatably disposed between the upper flange and the lower flange and abutting on a tape, and a shuttle are mounted. A first support portion formed on the shuttle and supporting the shaft by press-fitting the shaft; and a first support portion provided on the slide plate and formed at the tip of the shaft penetrating the shuttle. A second support portion that supports the shaft by screwing the screw portion and that enables height adjustment, and the shaft is supported by the first and second support portions. It is characterized by having.

[0023]

As shown in FIG. 1 showing an embodiment of the present invention, the shaft 41 is pressed into the hole 20a of the shuttle 20 to support the shaft 41 in the shuttle 20, and the shaft 41 is pierced. The male screw 41 a of the shaft 41 is screwed into the female screw 24 b of the receiving seat 24 a formed on the slide plate 24. By this press-fitting, the shaft 41 can be reliably supported at a predetermined position. Then, the shaft 41 can be firmly fixed to the shuttle 20 by the two-point support by press-fitting and screwing. The height of the roller guide 4 can be adjusted by changing the screwing amount of the shaft 41.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a tape running roller guide according to the present invention will be described in detail below with reference to FIGS.

FIGS. 2 and 3 are a front view and a plan view showing a tape path guide of a rotary digital audio tape recorder (R-DAT) in which the tape guide roller guide according to the present invention is incorporated. .

In FIG. 2 and FIG.
The guides that lead the tape are fixed guide 1, ten leg 2, fixed guide 3, tape guide roller guide 4, inclined guide 5, inclined guide 7 on the return path, return guide 8, fixed guide 9, which are implanted in mechanical chassis 6. , Capstan 1
0, a swing guide 11, a fixed guide 12, and a pinch roller 17.

More specifically, the fixed guide 1 is fixed to the mechanical chassis 6, and determines the fulcrum of drawing out the tape 15,
Even if the winding diameter of the tape 15 changes, the tape 15
4 so as not to hit the inner wall. In addition, the fixed guide 1 has flanges formed at both ends, and suppresses fluctuation of the tape 15 pulled out from the flangeless cassette.

The tension regulator (tension regulator) 2 controls the tension of the tape 15 during the pass. The fixed guide 3 is erected on the mechanical chassis 6 and supports the tape 15 with a lower flange.

The tape guide roller guide 4 includes a drum 16
The roller guide is used because of the large wrap angle. The inclined guide 5 changes the direction of the tape 15 sent from the tape running roller guide 4 and sends the tape 15 to the M loading path of the drum 16.

The inclined guide 7 changes the direction of the tape 15 passing through the M loading path. The return guide 8 functions to load the tape 15 in the same shape as the tape guide roller guide 4 on the entry side. The fixed guide 9 is fixed to the mechanical chassis 6 and supports the tape 15 with a lower flange.

The capstan 10 holds the mechanical chassis 6 with the tape 15 sandwiched between the capstan 10 and the driving pinch roller 17.
It is erected in.

The swing guide 11 has upper and lower flanges formed to guide the tape 15 through the capstan 10. The fixed guide 12 is fixed to the mechanical deck, and the linearity of the tape 15 is maintained by upper and lower flanges.
4

The tape running roller guide 4, the inclined guide 5, the inclined guide 7 and the return guide 8 are mounted on a shuttle 20, respectively.

FIG. 1 is an enlarged cross-sectional view showing a mounted state of the tape running roller guide according to the present invention.

In FIG. 1, a tape guide roller guide (hereinafter referred to as a roller guide) 4 has a male screw 4 at its lower end.
A shaft 41 on which the shaft 41 is engraved; an upper flange 42 fixed to the upper end of the shaft 41; a roller 43 rotatably inserted into the shaft 41;
And a lower flange 44 fixed to the lower flange 44. Drive grooves (not shown) are formed on the upper surface of the upper flange 42.

The shaft 41 of the roller guide 4 is formed with a hole 20a of the shuttle 20 which is formed with a smaller diameter than the shaft 41.
When a screwdriver (not shown) is inserted into the drive groove of the upper flange 42 and rotated while the shaft 41 penetrates the hole 20a, the male screw 41a protruding from the hole 20a is seated on the slide plate 24. It is screwed into a female screw 24b engraved on 24a. Here, the shaft 4
1 is screwed into the receiving seat 24a by a male screw 41a integrally formed at the lower end thereof, and is press-fitted into the shuttle 20, so that the thickness of the shuttle 20 itself supporting the shaft 41 is not so required. The receiving seat 24a is formed so as to protrude upward as shown in the figure, and since the female screw 24b is formed at this protruding portion, it is possible to prevent the thickness from being increased by providing the screw. Since the shaft 41 is press-fitted into the hole 20a and supported, the press-fitting and fixing by screwing increase the accuracy of the shaft 41 with respect to a predetermined position with respect to the shuttle 20, so that the shaft 41 can be reliably positioned at the predetermined position. it can.

As described above, the tape guide roller guide 4
A first support portion for supporting the shaft 41 by press-fitting the shaft 41 into the hole 20a of the shuttle 20 body, and in this state, the shaft 41 is connected to the slide plate 24.
To support the shaft 41 by screwing it into
The shaft 41 is supported at two points with the support portion. As a result, even if the thin shuttle 20 is used, the roller guide 4 is more securely fixed, and the height of the roller guide 4 is adjusted by the male screw 41a and the female screw 24b.
Is adjusted by changing the amount of screwing, and the adjustment is easy. Since the boss 21, the set screw 22, the nut 25 and the like are not used, the number of parts is small, and the number of assembling steps can be reduced.

In the above-described embodiment, the present invention has been described with respect to the tape guide roller guide 4 on the entrance side of the M loading path. However, the present invention can be applied to the return guide 8 for tape loading on the exit side of the M loading path.

In the above-described embodiment, the present invention has been described for the roller guide of the M-loading system. However, the invention can be applied to a roller guide of another loading system.

[0040]

The tape guide roller guide according to the present invention is such that the shaft of the roller guide is press-fitted into the hole of the shuttle and the tip of the shaft is screwed into the slide plate and fixed. The guide can be mounted in place,
In addition to the more secure fixing, the roller guide can be mounted at a high accuracy at a right angle, so that a stable tape running roller guide can be realized.

Further, the simple shaft press-fitting structure has economical and practical effects such as a reduction in the number of parts and man-hours for working and mounting, and a reduction in the thickness of the shaft support portion.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an attached state of a tape running roller guide according to the present invention.

FIG. 2 is a schematic front view showing a tape path guide in which a tape guide roller guide according to the present invention is incorporated.

FIG. 3 is a schematic plan view of FIG. 2;

FIG. 4 is a cross-sectional view showing an attached state of a conventional roller guide.

FIG. 5 is a cross-sectional view showing a mounted state of another conventional roller guide.

FIG. 6 is a cross-sectional view showing a mounted state of another conventional roller guide.

[Explanation of symbols]

 4 Roller Guide for Tape Travel 20 Shuttle 23 Arm 24 Slide Plate 24a Receiving Seats 21b, 24b Female Screw 41 Shaft 41a Male Screw 43 Roller

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshihiro Endo 1-2-1-11 Ikenoba, Taito-ku, Tokyo Inside Iwa Corporation (56) References JP-A-63-50951 (JP, A) −115930 (JP, U) Actual opening 63-135534 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] 1. An upper flange and a lower flange fixed to a shaft, a roller rotatably disposed between the upper flange and the lower flange and in contact with a tape, and a slide plate on which a shuttle is mounted and moves. A first support portion formed on the shuttle and supporting the shaft by press-fitting the shaft; and a screw provided on the slide plate and formed at a tip of the shaft penetrating the shuttle. A second support portion that supports the shaft by being screwed together, and that allows height adjustment, and the shaft is supported by the first and second support portions. A tape guide roller guide characterized by being made.