JPS6174164A - Tape loading device - Google Patents

Abstract

PURPOSE:To prevent the damage of a tape during loading by providing a tape guide which is brought into contact with the tape only during loading and is not brought into contact with it after loading. CONSTITUTION:A moving base 15 driven by a driving device is moved along a cam groove 5, and a tape 43 is led out while coming into contact with inclined tape guides 16-18 of the base 15. Next, a pinch roll 34 and a loading ring 2 provided with tape guides 35-37 are turned to load the tape 43, and the guide 16 is separated from the tape 43. By this constitution where the tape of low rigidity is guided sufficiently during loading, the damage of the tape during loading is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a tape loading device for a VTR, and more particularly to a tape loading device that is improved so as not to damage the tape during tape loading.

When loading a tape in a conventional VTR, the tape is pulled out from a tape cassette placed in a horizontal position, wound around an inclined rotating head drum, and unwound along a predetermined path (tape running path). passed on. Therefore, the inclination of the tape wound around the tape guides is naturally the same during loading and when loading is completed. However, conventionally, the time when loading is completed is used as a reference, and tape guides are arranged so that the tape is not twisted when loading is completed.

Problems to be Solved by the Invention For this reason, it is difficult for tape guides to satisfy the above conditions when placed during loading, and therefore, when using a thin and weak tape, the edges may be scratched. , and often caused unilateral stretching.

On the other hand, as a countermeasure to this problem, a mechanism has been proposed in which the inclination of the tape guide is changed in conjunction with the operation of the loading mechanism, but this has the disadvantage that it has a complicated structure and is difficult to achieve accuracy.

The present invention was made in view of the above-mentioned circumstances, and its purpose is to provide a tape loading device that does not cause damage to the tape during loading when loading thin and weak tape. become.

Means for Solving the Problems In order to achieve the above object, the inventor of the present invention devised the locus of the loading mechanism and created a tape guide that contacts the tape only during loading and does not come into contact when loading is complete. The inclination angle of the tape guide was arbitrarily selected to match the inclination of the tape during loading.

That is, it includes a movable base that is driven by a drive device and moves along a cam groove provided in the chassis, and a plurality of tape guides implanted in this movable base, one of which is the above-mentioned tape guide. The tape was drawn out by moving the movable table, and after the loading of the tape was completed, there was no contact with the tape.

Effects With the above configuration, the tape being loaded is passed through the one tape guide and placed on the other tape guide, and the tape when loading is completed is placed directly on the other tape guide. Therefore, the arrangement and inclination angle of the other tape guides should be set to the most suitable for the tape after loading, and the angle of the one tape guide should be selected to avoid any inconvenience that may occur to the other tape guide during tape loading. The correction can be made using the one tape guide mentioned above.

Embodiment Hereinafter, an embodiment of the present invention applied to a tape loading device for a VTR will be described with reference to the drawings.

First, the tape drawing device 1, which is the main part of the tape loading device according to the present invention, will be explained with reference to FIGS. 2 to 6. As shown in FIG. 2, this tape drawing device 1
is provided adjacent to the loading ring 2 and close to the take-up reel stand 3. In the figure, reference numeral 4 denotes a guide plate fixed on the chassis, and a cam a5 of a predetermined shape is formed on the guide plate 4 at a predetermined position. Note that the terminal end of this cam a5 is a cam groove 5a having a different direction.

As shown in FIGS. 3 to 5, a support shaft 6 is provided at the bottom of the guide plate 4.
A fan-shaped gear 7 is provided which can rotate around .
This sector gear 7 is meshed with a drive gear 9 which is rotationally driven by a loading motor 8 shown in FIG. 2 via a reduction gear (not shown).

Further, a rotating lever 10 is attached to the same support shaft 6 between the guide plate 4 and the sector gear 7, and this rotating lever 10
is connected to the sector gear 7 via an I return spring 13 hooked between a locking piece 11 fixed to the rotary lever 10 and a locking piece 12 fixed to the sector gear 7. .

On the other hand, the movable table 15 that is moved along the cam a5 is a flat plate having a substantially triangular shape, and tape guides 16 and 17 each inclined in a predetermined direction are provided at predetermined positions on the movable table 15.
．． 18 have been planted.

Of these, tape guides 16 and 18 are made up of fixed bottles, and tape guide 18 is made up of a rotatable guide roller 19 attached to the outer periphery of the fixed bottle and a cap 20 that also serves as a flange on the top of the bottle. In addition, two guide bins 21 and 22 are provided downwardly at predetermined positions on the movable table 15.
are implanted, and these two guide pins 21 and 22 move along the inside of the cam groove 5. This determines the position of the movable table 15, and thus the tape guides 16 to 18, at each time during movement.

The movable metalwork 5 and the rotary lever 10 are connected to each other by a link plate 24 provided between the guide pin 21 and a pin 23 at the tip of the rotary lever 10. A link plate 25 is also provided between the two.

The reference numeral 27 in FIG. 3 is a stopper pin fixed near the end of the cam groove 5 of the guide plate 4, and its head has a conical retaining surface 28 as shown in FIG. It is formed. Then, on the pin 27 that has this locking surface 28,
A semicircular recess 30 having a conical counterbore surface 29 formed at a predetermined position of the movable table 15 is adapted to be engaged therewith. Further, reference numeral 31 denotes a tape guide with a flange and a guide roller, which is attached to a predetermined position on the guide plate 4.

Furthermore, in FIG. 2, numeral 33 is a rotating head drum, numeral 34 is a pinch roller provided on the loading ring 2, numerals 35 to 37 are tape guides attached to the same loading ring 2, and numeral 38 is a supply reel stand. ,
39 is a tape pull-out pin on the supply reel stand side, 40 is a ten-leg pin, and 41 is a loading ring drive gear that meshes with the ring gear of the loading ring 2.

Next, the tape loading operation will be described, mainly the operation of the tape pull-out device 1 configured as described above. When the tape cassent is installed, the tape 43
is in the state shown by the two-dot chain line in FIG. At this time, the cheap guides 16 to 18 of the moving table 15 are inside the tape 43, and the pinch roller 34 of the loading ring 2 and the tape guides 35 to 37. A tape pull-out pin 39 and a tenge pin 40 on the supply reel stand 38 side are also arranged inside the tape 43. When the loading motor 8 starts rotating in a predetermined direction, the sector gear 7 first rotates clockwise via the drive gear 9. Therefore, in FIG. 3, since the rotating lever 10 connected to the sector gear 7 via the torsion spring 13 also rotates clockwise, the rotating lever 10 is connected via the link plate 24. The moving table 15 that has been moved starts moving. The guide pins 21 and 22 are guided by the cam groove 5, and the movable table 15 moves toward the stopper 27. Therefore, the tape 43 is mainly used in the tape guide 1.
6.

When the movable table 15 approaches the end of its movement, only the guide pin 22 enters the cam groove 5a in a different direction, so the movable table 15 swings counterclockwise around the guide pin 21. Become. Therefore, as shown in FIG. 7, the tape guide 16, which has been leading the way up until now, is now rotated counterclockwise. When the moving table 15 comes into contact with the stopper 27 and stops, the tape guides 16 and 17 are aligned in a direction substantially perpendicular to the tape pulling direction, as shown in FIGS. 4 and 8. However, even at this time, the tape 43 is wrapped around the tape guides 16, 17, 18 and the fixed tape guide 31 as shown in FIG.

On the other hand, in parallel with the operation of the tape pull-out device 1, the tape pull-out pin 39 and the ten-leg pin 4 on the supply reel stand side are
0 is also pulled out, resulting in the state shown in FIG.

When this first loading is completed, the drive from the loading motor 8 is switched from the gear 9 to the loading ring drive gear 41, and the loading ring 2 rotates counterclockwise. As a result, the tape 43 is further drawn out, and as shown in FIG. 1, is wound around the rotary head drum 33, thereby completing the loading of the tape. At this time, as shown in FIG. 1, the tape 43 that had been applied to the tape guide 16 is now
, and is not in contact with the tape guide 16.

Note that the time lag from when the movable table 15 comes into contact with the stopper 27 until the driving force of the loading motor 8 is switched to the driving gear 41 is absorbed by the deformation of the tear spring 13. Furthermore, since the movable table 15 and the stopper 27 are engaged with each other at the conical retaining surfaces, the movable table 15 will not be lifted up due to the tension of the tape, and the running tape will not be shaken.

As described above, the tape guide 16 comes into contact with the tape 43 during tape loading, and the tape 43 during loading passes through the tape guide 16 to the tape guide 17.
After tape loading is completed, the tape guide 16 is not in contact with the tape and the tape 4 is
3 will be applied directly to the tape guides 17 and 18. Therefore, the inclination angle of the tape guide 17.18 should be set to the most suitable state for the tape after loading, and the angle of the tape guide 16 should be selected to minimize the inconvenience caused to the tape guide 17.18 during tape loading. The correction can be made using the guide 16. This makes it possible to prevent excessive force from being applied to the tape during loading.

As described in detail, according to the present invention, one of the plurality of tape guides installed in the movable base pulls out the tape by moving the movable base, and after the loading of the tape is completed, the tape is pulled out. It is configured to be contactless. Therefore, the tape being loaded is passed through the one tape guide mentioned above and placed on another tape guide, and the tape after loading is directly placed on the above tape guide. Therefore, the arrangement and inclination angle of the tape guide of the above type should be set to the most suitable for the tape after loading, and the angle of the one tape guide mentioned above should be selected to avoid any inconveniences that may occur to the tape guide of the above type during tape loading. It is possible to correct this. This makes it possible to prevent excessive force from being applied to the tape during loading, so that thin and weak tapes can be loaded without being damaged.

[Brief explanation of drawings]

The figures show an embodiment in which the present invention is applied to a VTR tape loading device. Fig. 1 is a schematic plan view of the VTR showing the state after tape loading is completed, and Fig. 2 is a schematic plan view of the VTR before tape loading. A diagram similar to FIG. 1 showing the state, FIG. 3 is a plan view of the tape drawer device before the tape is drawn out, FIG.
Figure 6 is a sectional view taken along the ■-V line in Figure 4, Figure 7 is a sectional view taken along the ■-Vr line in Figure 4, and Figure 7 is Figure 3 showing the state before the moving table swings its head at the terminal end. A similar diagram, FIG. 8, is a +φ diagram same as FIG. 1, showing a state in the middle of loading after the first loading by the chip pulling device. In addition, in the codes used in the drawings, 2-・・・−・−・−・・−・・−・Loading ring 4−・−−−−−・−・−・−・・−・−Guide 1 ( Chassis) 5・-m-------------Cam groove 7
・−−１−−・−−−−−１−−−・−・Sector gear 8・
−・−−−−−−−−−−・−・−Loading motor 9−・−−−−−−−−−・−−−m− Drive gear 10
−−−−−−−−−−−−・−Rotation control −15−−
------, --.--------------------------------------------------------------------------------------------------------------

Claims (1)

[Claims] It is equipped with a movable base that is driven by a drive device and moves along a cam groove provided in the chassis, and a plurality of tape guides installed in this movable base, and one of the tape guides is connected to the movable base. The tape loading device is configured to draw out the tape by moving the tape, and to come out of contact with the tape after loading the tape.