JPS6338775B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape loading mechanism for a fixed head video tape recorder.

Fixed-head video tape recorders often have a configuration in which the tape roll is connected to the capstan, making it difficult to automate the complicated operation of loading and unloading the tape roll from the case, making it difficult to convert the tape into cassettes or cartridges. I have to.

SUMMARY OF THE INVENTION Therefore, the present invention proposes a tape mounting mechanism for a fixed head video tape recorder that uses a tape cartridge that facilitates automatic loading and unloading of tape rolls.

The following is an exploded perspective view of the case of FIG. 1 regarding the configuration of a tape cartridge according to an embodiment of the present invention.
This will be explained according to the sectional views shown in FIGS. 2 and 3. The tape cartridge case of this embodiment includes fixed side cartridge cases 2 and 3 that fix an arm 1, and rotating side cartridge cases 5 and 6 that are rotatably supported by the arm 1 by a pivot pin 4. The winding hub 7a of the tape roll 7 is supported in the semicircular notches 2a, 3a, 4a, 5a, and 6a at the center, and the lock pin 8 is attached to the C-shaped engagement portion 1a at the tip of the arm 1. The large-diameter portion 8a is engaged to lock the case in the closed state as shown in FIG.
A lock release pin (not shown) is inserted into the C-shaped engaging portion 1a against the bias of the spring 9.
The small diameter portion 8b of the lock pin 8 is positioned so that the tape roll 7 can be taken out by opening the cartridge case as shown in FIG. 3 as the cartridge case support is rotated. Incidentally, on the outer periphery of the tape roll 7, there is a leader member 7 made of synthetic resin that is wrapped around the tape roll 7 to prevent the tape from loosening.
b is arranged.

A tape mounting mechanism for taking out and loading a tape roll from the tape cartridge described above will be described below. FIG. 4 shows an exploded perspective view of the cartridge support mechanism, and the numbers 10 and 11 in the figure are as follows:
The cartridge holder halves 12 and 13 that house the cartridge case are fixed to the respective bottoms of the two cartridge holder halves 10 and 11, and are rotatably and slidably pivoted on slide shafts 14 and 15 on the base. The supported holder sliders 16 and 17 are fixed to the outside of both the holder sliders 12 and 13, and the pinion 1
Rack plates 8 and 19 mesh with each other; 20 and 21 are brackets that support the shaft 22, which rotates together with the pinions 18 and 19, on a base; 23 is fixed to one end of the shaft 22, and is manually operated. A loading lever 24 rotates the pinions 18 and 19 and slides and guides the cartridge holder halves 10 and 11 in the vertical direction along the slide shafts 14 and 15; Winding hub 7a
25 is a support block that supports the hub axle 24; 25a is attached to the support block 25, and when the cassette is inserted, the holder slider 1
The support block 25 contacts the arm portions 12a and 13a of 2 and 13 to keep the cartridge holder halves 10 and 11 in a closed state after the cartridge has been lowered.
The rollers that allow the holder sliders 12 and 13 to rotate as the holder sliders 12 and 13 move are shown. Therefore, according to the above-mentioned mechanism, first the pinions 18, 1
Insert the tape cartridge into the cartridge holder halves 10 and 11, which are in the closed state in the upper position by engaging the racks 16 and 17 with the cartridge holder 9, and turn the loading lever 23 in one direction. When it is moved, the cartridge holder halves 10 and 11 are lowered together with the racks 16 and 17 that mesh with the pinions 18 and 19, and the slide shaft 15 enters the lock hole 6a of the cartridge case 6 at the lowered position. The cartridge case is unlocked by the tip, and the hub 7a and the hub shaft 24 are fitted together. In such a state, the means for detecting the lowering of the cartridge holder halves 10, 11 moves the support block 25 toward the capstan, so the hub 7a is configured to push open the cartridge holder halves 10, 11. Then, the cartridge is removed from the cartridge case 2, 3, 5, 6 (see FIG. 6). As a result, the engagement between the racks 16, 17 and the pinions 18, 19 is released.

The tape loading operation will be explained below with reference to FIG. The means for detecting the lowering of the cartridge holder halves 10, 11 is to drive a first pinion 26a meshing with the rack portion 25b of the first support block 25 with the first tension applying motor 26, is moved toward the capstan 29 side along the sliding rail 27 and the first support guide 28, and the tape roll 7 is moved to the capstan 29 side along the slide rail 27 and the first support guide 28.
Transfer to 9. In this state, the capstan 29 is rotated clockwise at low speed, the brake lever 30 pivoted on the bracket 21 is pulled by the plunger 31, and the brake roller 30a at the tip is moved around the outer periphery of the tape roll 7. Leader member 7
The leader member 7b is guided along the guide plate 32 and wound around the second hub 34 on the second support block 33 by its own elasticity. In this state, the tape T is attached to the guide block 35 on the inner circumference of the guide plate 32.
The tape mounting is completed by being guided around the fixing head 36. After the tape loading is completed, the plunger 31 is deenergized, the capstan 29 rotates at high speed, and the second tension applying motor 37 on the second support block 33 side applies a stronger force than the first tension applying motor 26. is driven by. Therefore, the tape roll on the second support block side 33 is
The tape is more strongly pressed onto the capstan 29 and the tape is wound up. By winding up the tape, the tape winding diameter increases, and the second support block 33 resists the bias of the second pinion 37a that meshes with the rack portion 33a, and moves the slide rail 27 and the second support The capstan 29 moves along a guide 38 in a direction opposite to that of the capstan 29 . When the end of the tape is detected by the first winding hub 7a after the tape has run, the rotating direction of the capstan 29 and the driving relationship of the first and second tension applying motors 26, 37 are reversed, and the fixed head 36 is track switching is performed by displacing the track by a predetermined pitch in the width direction. While repeating such operations, the mechanism of this embodiment scans the tape T in its longitudinal direction to record and reproduce video signals.

To end recording or playback after that,
By rotating the capstan 29 counterclockwise to completely wind the tape T around the first winding hub 7a, and returning the second support block 25 by driving the first tension applying motor 26. The tape roll 7 is stored in the cartridge cases 2, 3, 5, and 6, and as the loading lever 23 is reversed, the cartridge case halves 10 and 11 are raised to remove the tape cartridge. making it possible.

Therefore, according to the tape mounting mechanism of the present invention, by moving the take-up hub, the cartridge case and the cartridge holder halves are opened, and the tape roll can be easily taken out from the cartridge case. The effect is great.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a tape cartridge case using the present invention, FIG. 2 is a cross-sectional view of the case in a closed state, FIG. 3 is a cross-sectional view of the case in an open state, and FIG. FIG. 5 is a schematic plan view of the mechanism in the closed state, FIG. 6 is a schematic plan view of the mechanism in the open state, and FIG. 7 is an exploded perspective view of the mechanism of the embodiment. Each shows a schematic plan view. 7a... Winding hub, 7... Tape winding body, 2,
3, 5, 6... Cartridge case, 10, 11
... Cartridge holder half, 24 ... Hub axle,
25... Support block, 18, 19... Pinion, 16, 17... Rack plate (rack).

Claims (1)

[Claims] 1. Cartridge cases 2, 3, 5, which store the tape roll 7 with the take-up hub 7a exposed.
a pair of cartridge holder halves 10 and 11 into which the cartridge holder 6 is inserted;
A hub shaft 24 that fits into the take-up hub 7a as the cartridge holder 11 is lowered, and a support block 25 that rotatably supports the hub shaft 24 are disposed, respectively. It is characterized in that the tape roll 7 is taken out from the cartridge case 2, 3, 5, 6 which is opened together with the cartridge holder halves 10, 11 by the movement of the support block 25. In the tape mounting mechanism of a fixed head video tape recorder, a pinion 18 to which the driving force for lowering the cartridge holder halves 10, 11 is transmitted;
19; and the cartridge holder half 10, which engages with the pinions 18, 19 during the lowering and disengages from the pinions 18, 19 when the cartridge holder half 10, 11 is in the open state.
1. A tape mounting mechanism for a fixed head video tape recorder, comprising racks 16 and 17 attached to the tape rack 11.