JPS6050740A - Feed device for cassette store case - Google Patents

Abstract

PURPOSE:To perform easy and accurate positioning of a cassette store case by feeding this case in pitch by a revolving action of a roller gear type intermittent transmission mechanism, and positioning the case at the take-out position of a cassette tape. CONSTITUTION:When the 2nd cam 9 is revolved once by a driving source 10 in the clockwise direction when viewed from the lower side of the figure, a roller 111 engaged with the groove 12 of the cam 9 is detached from the groove 12. Then the next roller 112 engages with another groove 12 of the cam 9. Meanwhile the 1st cam 8 is turned clockwise by 360/n deg.. Therefore a driving pulley 1 which is fixed coaxially to the cam 8 is also turned clockwise by the same amount. As a result, a cassette store case 5 is moved down by a fixed amount with the shift of a belt 3. In this case, the shift amount of the case 5 is set equal to parallel pitches (p) of a cassette 7 by setting properly the outer diameter of the pulley 1. The case 5 moves up when the cam 9 is revolved reversely. Thus the case 5 can be moved up and down by the amount equal to an integer multiple of (p) by revolving the cam 9 forward and reversely respectively.

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a magnetic tape device equipped with an automatic cassette tape exchange function, and more particularly to a magnetic tape device that is capable of reliably positioning any cassette tape stored in a cassette storage box at a take-out position. This invention relates to a cassette storage box feeding device.

PRIOR ART AND PROBLEMS Conventional feeding devices that move a cassette storage box in which multiple cassette tapes are stored one on top of the other so that any cassette tape is positioned at the take-out position employ a method using a wire or the like. However, with this method, it was difficult to accurately position the cassette tape.

OBJECTS OF THE INVENTION The present invention is intended to solve the above-mentioned problems, and it is an object of the present invention to provide a cassette storage box feeding device that can easily and accurately perform the movement and positioning of a cassette storage box.

Structure of the Invention In the present invention, a driving roller and a driven roller are provided, a belt is passed between the two rollers, and a cassette storage box is attached to the belt between the two rollers so that the overlapping direction of the cassette tapes is along the belt. a first cam fixed coaxially with the drive pulley, and having n rotatable rollers arranged at equal intervals in the circumferential direction; and a plurality of threaded grooves on the outer periphery in which the rollers engage. A roller gear type intermittent transmission mechanism is provided, the roller gear type intermittent transmission mechanism comprising a second cam that is driven one rotation in the forward and reverse directions by a drive source and rotates the first cam by 600 (=) for each rotation. The above object is achieved by moving the belt using an intermittent transmission mechanism to position the cassette tape in the cassette storage box at the take-out position (6).

Examples of the invention The invention will now be described in detail in conjunction with the drawings.

FIG. 1 is a front view showing the overall outline of the cassette storage box feeding device according to the present invention, in which 1 is a driving pulley, 2 is a driven pulley, 6 is a belt, 4 is a holder, 5 is a cassette storage box,
6 is a roller gear type intermittent transmission mechanism.

Drive pulley 1. The slave pulleys 2 are opposed to each other in a predetermined direction, and the belt 3 is passed around both pulleys. The right side portion of the belt 3 between both pulleys is along the moving direction when the cassette storage box is in the 4th position.

The holder 4 is fixed to the belt 6 on the right side between the pulleys 1 and 2, and is movable within a predetermined range in the vertical direction in the figure.

The cassette storage box 5 is attached to the holder 4. As shown in detail in FIG. 2 (4), this cassette storage box 5 stores a plurality of cassette tapes 7 stacked at a pitch p.

As shown in detail in FIG. 6, the roller gear type intermittent transmission mechanism 6 is composed of a first cam 8, a second cam 9, and a drive source 10 that drives the second cam 9. . The first cam 8 has n rollers 111, 1 arranged at equal intervals in the circumferential direction.
1. , . . . , and each of these rollers is provided so as to be rotatable about an axis extending in the radial direction. The second cam 9 is provided with a plurality of thread-shaped grooves 12 at equal intervals in the circumferential direction on its outer periphery, and at least one of the rollers 11 mentioned above always meshes with the grooves 12. Further, this second cam 9 is driven by a drive source 10 to rotate one rotation at a time. Gao, second
This rotation of the cam 9 can be easily realized by, for example, being driven by the drive source 10 via a one-turn clutch (not shown).

Now, when the second cam 9 is rotated once in the clockwise direction when viewed from the bottom of FIG. After leaving, the next roller 11! engages with another groove 12 of the second cam 9, during which the first cam 8 rotates by 0 in the clockwise direction in FIG. Therefore, the drive pulley 1, which is fixed coaxially with the first cam 8, also rotates in the same direction and at the same angle, and the accompanying movement of the belt 3 causes the cassette storage box 5 to move a predetermined amount downward in FIG. . In this case, the amount of movement of the cassette storage box 5 (the amount of movement of the belt 6) is the amount of movement of the drive pulley 1.
By appropriately setting the diameter of the cassette tapes 7, it can be made equal to the pitch p of the cassette tapes 7 arranged side by side. If you want to move the cassette storage box 5 downward by an amount of
All you have to do is rotate the cam 9 a few degrees. Similarly, by rotating the second cam 9 in the opposite direction to that described above, the cassette storage box 5 can be moved upward.

In this way, by rotating the second cam 9 in the forward and reverse directions by a desired number of rotations, the cassette storage box 5 can be moved in the vertical direction by an integral multiple of p, and the desired number of rotations in the cassette storage box 5 can be moved. It is possible to position the cassette tape 7 at the unloading position. Also, in this case, the second “
Since the cassette storage box 5 can be fed by one pitch with one rotation of the cam 9, control is greatly simplified.

In addition, in FIG. 1, the first cam 8 is the pulley 1 for convenience.
It is shown off-center.

Effects of the Invention As described above, according to the present invention, the cassette storage box is pitch-fed by one rotation of the second cam of the roller gear type intermittent transmission mechanism to position the cassette tape at the take-out position. This makes it possible to easily and accurately position the desired cassette tape.
Moreover, it is possible to simplify the control system. Furthermore, the overall structure of the device is simple and easy to manufacture.

[Brief explanation of drawings]

The drawings show an embodiment of the cassette storage box feeding device according to the present invention. FIG. 1 is a front view showing the overall outline of the device, FIG. 2 is a front view showing details of the cassette storage box, and FIG. 5 is a front view showing the details of the cassette storage box. FIG. 3 is a diagram of the operating principle of a roller gear type intermittent transmission mechanism. (7) In the figure, 1 is a driving pulley, 2 is a driven pulley, 6 is a belt,
4 is a holder, 5 is a cassette storage box, 6 is a roller gear type intermittent transmission mechanism, 7 is a cassette tape, 8 is a first cam, 9
is the second cam, 10 is the drive source of the second cam, 11+, 1
h+..., 11 is a roller, and 12 is a screw-shaped groove. Patent applicant Fujitsu Ltd. Representative Patent Attorney Gobu Tama Mushiku (1 other person) (8)

Claims (1)

[Claims] t. Using a cassette storage box that stores a plurality of cassette tapes stacked at a pitch p, move the cassette storage box in the direction in which the cassette tapes overlap to position a desired cassette tape at a take-out position; A magnetic tape device that takes out and processes the cassette tape is provided with a driving roller and a driven roller, and a belt is passed between the two rollers, and the cassette storage box is placed on the belt between the two rollers so that the direction in which the cassette tapes overlap is aligned. a first cam that is fixed along the belt and that is rotatable and that is provided with n rotatable rollers at equal intervals in the circumferential direction; a first cam that is fixed coaxially with the drive pulley; and a plurality of rollers that mesh with the outer peripheral portion of the first cam. A roller gear type intermittent transmission mechanism comprising a second cam having a threaded groove and driven one rotation in forward and reverse directions by a drive source and rotating the first cam by (a) 0 for each rotation. A cassette storage box feeding device d0, characterized in that the roller gear type intermittent transmission mechanism moves the belt to position the cassette tape in the cassette storage box at a take-out position. 2. The cassette storage box feeding device according to claim 1, wherein the outer diameter of the drive roller is set so that the belt moves by a pitch p during one rotation of the second cam.