JPH06223457A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To provide a loading mechanism with high reliability on suppression of damage to a tape during its loading without adding any interference evading mechanism in the magnetic recording and reproducing device of one reel cartridge type. CONSTITUTION:While loading, a leader block 19 is supported from its lower side by a base member 20a erected with a magnetic tape drawing member 20. Then, a machine reel driving motor 5 is disposed above a machine reel 4. Then, a groove width B4 of a groove provided on a lower flange of a machine reel is larger than a diameter phiD of the magnetic tape drawing member 20, but is smaller than a width B19 of the leader block 19.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leader block withdrawing mechanism, a guiding mechanism and a machine reel containing the leader block, and more particularly to a magnetic recording / reproducing apparatus suitable for protecting a magnetic tape.

[0002]

2. Description of the Related Art A magnetic recording / reproducing apparatus of this type, which is mainly used as a file device of a computer system, conventionally employs a loading mechanism as disclosed in Japanese Patent Laid-Open No. 4-76849. That is, the magnetic tape pull-out member suspended from the tip of one link arm goes around from below the leader block and engages with the leader block. Then, the magnetic tape pull-out member hangs the leader block for loading. Further, since the leader block is lifted up and stored in the machine reel, a groove for moving the magnetic tape pull-out pin is provided in the machine reel upper flange.

[0003]

In the hanging system, the magnetic tape pulling member is wound around the lower side of the leader block and then engages with the leader block, so that the magnetic tape pulling out member has a longer shape. Therefore, the influence of rattling of the link arm is easily transmitted to the leader block. Also, since it is suspended at 1 point,
Attitude control of the leader block during loading is difficult. However, in the future, the demand for long-time recording will make the magnetic tape thinner, and it becomes important to control the attitude during the loading of the leader block. In addition, the current fixed head method has a disadvantage that a large amount of magnetic tape is used, and it is presumed that the system shifts from the fixed head method to the rotary head method due to the reduction of the usage amount. However, in the rotary head system, since the magnetic tape is wound around the cylinder in a spiral manner, the magnetic tape loading path becomes three-dimensional. Therefore, loading with one hanging arm is extremely difficult from the viewpoint of scratches on the tape.

[0004]

A base member on which a magnetic tape pulling member is planted is arranged below a leader block. Further, a machine reel driving motor is installed above the machine reel so that the magnetic tape pullout member 20 is positioned below the machine reel 4 after the loading is completed. Further, the groove width of the machine reel lower flange provided as the passage of the magnetic tape drawing member is made larger than the diameter of the magnetic tape drawing member and smaller than the leader block width.

[0005]

Since the leader block and the magnetic tape pulling member are engaged by mounting the cartridge from above the magnetic tape pulling member, the length of the magnetic tape pulling member can be minimized. Therefore, the leader block is not easily affected by the play of the loading mechanism. Further, during loading, since the lower surface of the leader block is supported by the base member on which the magnetic tape drawing member is erected, the posture of the leader block in the tape width direction can be stably maintained.

Further, the machine reel is mounted on a shaft of a machine reel driving motor which is moved to the upper part of the machine reel and is suspended. Therefore, it is possible to introduce a loading mechanism that supports the leader block from below without adding a mechanism for avoiding interference between the machine reel driving motor and the loading mechanism.

Further, since the leader block transferred to the machine reel lower flange is narrower than the machine reel lower flange groove width, the leader block is guided to the magnetic tape pulling member without falling down into the groove and being stably tilted. It is stored in the reel hub.

Therefore, even if the tape is made thinner and the loading path is made three-dimensional, the tape can be loaded without damaging it.

[0009]

1 and 2 are a plan view and a side view of a magnetic recording / reproducing apparatus according to an embodiment of the present invention. When the magnetic tape pull-out member 20 is set up on the base member 20a and the cartridge 1 is mounted on the reel motor 15, the leader block 19 is engaged with the magnetic tape pull-out member 20 from above. Therefore, the length of the magnetic tape pull-out member 20 is a minimum length corresponding to the thickness of the leader block 19. Therefore, the influence of play during loading on the posture of the leader block is small. Reference numeral 17 is a guide plate. As shown in FIG. 2, the magnetic tape pulling member 20 is three-dimensionally arranged and is loaded along the groove 17a on the guide plate.

Further, as shown in FIG. 3, the base member 20
Stepped shafts 20b and 20c are planted in the lower part of a. A leaf spring 23 is mounted between the stepped portions of the stepped shafts 20b and 20c and the guide plate 17,
Due to this spring force, the base member 20a is constantly pressed against the guide plate 17 during the loading operation to maintain an appropriate posture. On the other hand, the timing belt 16 has
Rings 16a and 16b are attached to the pin 20
Since the outer diameters of b and 20c are sufficiently smaller than the inner diameters of the rings 16a and 16b, the pins 20b and 20c inserted in the rings 16a and 16b can move freely inside the rings 16a and 16b. Therefore, the loading operation is smoothly performed. Also, the timing belt 16
Are arranged along the loading path of the base member as indicated by the one-dot chain line in FIG. 1, and are driven by the motor 21. The machine reel 4 is mounted on and suspended from a machine reel driving motor shaft 5a (see FIG. 8). Therefore, a catcher 22 for positioning the magnetic tape pullout member 20 after the completion of loading is installed below the machine reel 4 with a space.

4 and 5 are a plan view and a side view of the entire apparatus during loading. The base member 20 and the leader block 19 are three-dimensionally moved along the groove 17a by the rotation of the timing belt 16. According to this, the magnetic tape 1a pulled out from the cartridge 1 is sequentially wound around the tape guides 6 to 16 and loaded three-dimensionally. The leader block 19 is loaded by the force of the leaf spring 23 applied to the base member that supports the leader block 19 while keeping the posture in which the tape to be pulled out is not overpowered.

6 and 7 are a plan view and a side view of the entire apparatus when loading is completed. When the leader block 19 enters the machine reel 1, the tape guides 12 and 13 move from the position indicated by the one-dot chain line to the actual position by a mechanism (not shown).
Is wrapped around. This completes loading. Further, FIG. 8 is a cross-sectional view of the machine reel portion in a state where loading is completed. The magnetic tape pull-out member 20 is positioned in a state where the center line thereof coincides with the motor shaft 5a of the machine reel 4 and is slightly separated from the leader block 19. Therefore, the rotation of the machine reel 4 is not hindered. When the machine reel 4 is thus suspended from the machine reel driving motor 5 arranged above the machine reel 4 in order to avoid interference between the machine reel driving motor 5 and the base member 20a, the guide plate 17, and the like. It is possible to arrange the guide plate and the catcher 22 at the optimum position below the machine reel without adding the mechanism of.

9 and 10 show the leader block 19 mounted on the machine reel lower flange 4d and mounted on the reel hub 4c. The width B ₁₉ of the leader block 19 is the width of the magnetic tape drawing member 20.
Of the diameter φD (see FIG. 3). On the other hand, with respect to the diameter φD of the magnetic tape drawing member 20, the groove width B of the groove 4b installed on the machine reel lower flange 4a.
₄ is slightly wider than the minimum required for the magnetic tape pull-out member 20 to move smoothly. Therefore, the width B ₁₉ of the leader block 19 is larger than the groove width B ₄ , and the leader block 19 pulled by the magnetic tape pull-out member 20 does not fall into the groove 4b and incline, so that the leader block hub 4c can be reliably held. Is stored in. Therefore, with such a groove width setting, an unreasonable force is not applied to the tape even when the leader block 19 is moving on the machine reel lower flange 4d.

The loading block has been described above, but the posture of the leader block 19 can be properly maintained even during unloading. Therefore, it is possible to provide a highly reliable loading mechanism against damage to the tape during loading. Shows the case of a three-dimensional tape path in the embodiment, the same effect can be obtained in any tape path including planar tape path.

[0015]

The leader block during loading and unloading can be kept in a posture in which the tape is not damaged. Further, there is no need to add a mechanism for avoiding interference between the machine reel driving motor 5 and the loading mechanism. Further, the posture of the leader block on the machine reel lower flange having the groove can be stably maintained. Therefore, it is possible to provide a reliable loading mechanism against damage to the tape even when the tape is three-dimensionally passed and the tape is made thinner.

[Brief description of drawings]

FIG. 1 is a plan view of a magnetic recording / reproducing apparatus when unloading is completed.

FIG. 2 is a side view of FIG.

FIG. 3 is a perspective view of a magnetic tape pullout member.

FIG. 4 is a plan view of the magnetic recording / reproducing apparatus during loading.

FIG. 5 is a side view of FIG.

FIG. 6 is a plan view of the magnetic recording / reproducing apparatus when loading is completed.

FIG. 7 is a side view of FIG.

FIG. 8 is a sectional view of a machine reel.

FIG. 9 is a plan view of a machine reel.

FIG. 10 is a plan view of the machine reel when loading is completed.

[Explanation of symbols]

1 ... Cartridge, 2 ... Cylinder, 4 ... Machine reel,
4a ... Lower flange of machine reel, 4b ... Lower flange groove of machine reel, 4c ... Machine reel hub, 5 ... Machine reel drive motor, 17 ... Guide plate, 19 ... Leader block, 20 ... Magnetic tape drawing member, 20a ... Base member, 22 ... Catcher, 23 ... Leaf spring, φD ... Diameter φD of magnetic tape drawing member 20, B ₄ ... Width of groove 4b,
B ₁₉ Width of the leader block 19.

Claims (3)

[Claims] 1. A reel containing a magnetic tape (1a)
Cartridge (1) enclosed in one and a leader block (1) provided at the end of the magnetic tape (1a).
9) a magnetic tape pulling member (20) for pulling out the magnetic tape (1a) from the cartridge (1) and a machine reel (4) for winding the pulled-out magnetic tape (1a). In the recording / reproducing apparatus, a magnetic recording / reproducing apparatus is characterized in that a base member (20a) in which a magnetic tape pullout member (20) is erected is located below a leader block (19). 2. A machine reel driving motor (5) is installed above a machine reel (4), and a magnetic tape pull-out member (20) after completion of loading of a magnetic tape (1a) is positioned below the machine reel (4). A magnetic recording / reproducing apparatus having a structure of: 3. The magnetic recording / reproducing according to claim 1, wherein the groove width B _{4 of the} machine reel lower flange groove (4b) is smaller than the leader block width B _{19 and} larger than the magnetic tape drawing pin diameter φD. apparatus.