JPH06290567A - Magnetic tape cartridge - Google Patents

Abstract

PURPOSE:To secure the mounting accuracy of a tape on a leader block and to improve the life of the tape and the reliability by providing a holding part to hold an engaging member and a recessed groove having nearly the same width as that of the tape on the leader block 1. CONSTITUTION:On the leader block 1, the recessed groove having the same width as that of the tape is engraved, and the lower end surface of the recessed groove having the same width as the tape width and the lower end surface of the leader block 1 are accurately machined. Also, a slot 8 for hooking the leader block 1 and a recessed part to engage with a pin 2 are provided. Since the engaging place of the pin 2 is designed to be somewhat smaller than the size of the pin 2, the tape 3 is fixed firmly to the leader block 2 by the engagement with the pin 2. The magnetic tape is fixed while preventing the tape from shifting at the time of inserting the pin 2 since the width between upper and lower flanges 9 provided on the pin 2 is formed to the same as the width of tape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic tape cartridge having a magnetic tape used as a storage medium of a file device of a computer system.

[0002]

2. Description of the Related Art Conventionally, a magnetic tape device has been used as a file device of a computer system. A magnetic tape used as a storage medium of this magnetic tape device is wound around a reel and stored in a cartridge, and in particular, a single reel type magnetic tape cartridge having one reel (hereinafter referred to as a magnetic tape cartridge). With respect to the magnetic tape, a leader block attached to the start end of the magnetic tape is guided into the magnetic tape device and mounted on a magnetic tape take-up reel provided in the magnetic tape device to write / read information to / from the magnetic tape. Is done.

Conventionally, the leader block provided at the starting end of the magnetic tape is only fixed by crimping the magnetic tape to the leader block with a pin, as described in JP-A-58-169380.

Now, a conventional magnetic tape cartridge will be described with reference to FIG. FIG. 2A is a perspective view showing a conventional magnetic tape cartridge. Figure 2 (b)
FIG. 6 is a conceptual diagram showing a conventional leader block and its related members. Inside the magnetic tape cartridge 4, a magnetic tape 3 is wound and stored on a reel (not shown). At the end of the magnetic tape 3, the reel and the leader block 1
It is fixed to. The magnetic tape 3 is fixed to the leader block 1 by a pin 2 at the beginning of the tape. The leader block 1 to which the magnetic tape 3 is fixed is pulled out from the magnetic tape cartridge 4 by joining the leader block pull-out pin 5 to the slot 8 provided at the tip of the leader block 1.

[0005]

When the accuracy of attachment to the leader block is poor at the beginning of the magnetic tape, the magnetic tape is wound when the magnetic tape is wound on the winding reel provided in the magnetic tape device. There is a problem that the magnetic tape edge is damaged due to the contact between the tape and the flange of the magnetic tape guide installed in the running system of the tape device. In the case of the rotary head system in which the magnetic head unit provided in the magnetic tape device winds the magnetic tape for recording and reproduction, in order to perform high density recording by helically winding the magnetic tape around the rotary magnetic head, the magnetic tape edge is It is important to protect the edge of the magnetic tape as it serves as a standard for recording and reproducing signals. In the conventional example shown in FIG. 2, the magnetic tape 3 is attached to the leader block 1
The starting point of is fixed without any device. Also,
In the magnetic tape cartridge described in JP-A-58-169380, there is no description about how to use the magnetic tape in the rotary head system.

It is an object of the present invention to suppress the height deviation of the magnetic tape when the magnetic tape cartridge is mounted in the magnetic tape device by ensuring the accuracy of mounting the leader block to the starting end of the magnetic tape. The purpose is to protect the edges when the tape is running and to ensure high reliability in recording and reproducing signals in the magnetic tape device.

[0007]

In order to achieve the above object, according to the present invention, when the leading end of the magnetic tape in the magnetic tape cartridge is pressure-fixed to the leader block, the magnetic tape is engaged with the leader block. The engaging member to be performed has a flange, and the leader block has a gripping portion for gripping the engaging member and a groove substantially corresponding to the tape width.

[0008]

According to the above-mentioned means, the lower end surface of the recessed groove provided for the width of the magnetic tape provided in the leader block is used as the magnetic tape fixing reference surface, and the magnetic tape is pressed against the magnetic tape fixing reference surface. From above the magnetic tape, a pin having a flange is pressed into a recess that engages with the pin of the leader block, and the magnetic tape is fixed by pressure. The recessed groove in the leader block, which is approximately the width of the magnetic tape, prevents the magnetic tape from shifting when it is attached, and regulates the movement of the magnetic tape so that it does not shift from the leader block even after being fixed by pins. To do.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. The first embodiment will be described with reference to FIG. Figure 1
It is a perspective view of the leader block which shows a 1st Example. In FIG. 1, 1 is a leader block, 2 is a pin, and 3 is a tape. The leader block 1 is provided with a groove corresponding to the tape width, and the lower end surface of the groove corresponding to the tape width and the lower end surface of the leader block 1 are accurately processed. In addition, the slot 8 for hooking the leader block 1 and the pin 2
There is a recess that engages with. The slot 8 of the leader block 1 is shaped to engage with the leader block drawing pin 5 of FIG. The lower end surface of the groove having the tape width is used as the reference surface 10 for fixing the tape, and the lower end surface of the leader block 1 is used as the reference surface for mounting the leader block on the take-up reel. Pin 2
Has flanges 9 on the top and bottom. With the tape edge pressed against the lower end surface of the groove corresponding to the tape width of the leader block 1, the pin 2 is inserted into the leader block 1 at the portion where the pin 2 engages. The pin 2 is fixed to the leader block 1 by crimping the tape 3 with the shaft portion between the flanges 9.
Since the portion where the pin 2 is engaged is designed to be slightly smaller than the pin 2, the tape 3 is strongly fixed to the leader block 1 by the engagement with the pin 2. The width between the upper and lower flanges 9 provided on the pin 2 is the tape width.
It is possible to fix the magnetic tape while preventing the tape from slipping during insertion.

The second embodiment will be described with reference to FIG. FIG. 3 is a perspective view of a reader block showing a second embodiment. In FIG. 3, as in the first embodiment, the leader block 1 has a recess corresponding to the tape width, and the lower end surface of the groove of the tape width and the lower end surface of the leader block 1 are processed with high precision, and the groove of the tape width is formed. The lower end surface of the tape is the reference surface 1 for fixing the tape
0, the lower end surface of the leader block 1 is used as a reference surface for mounting the leader block on the take-up reel. The pin 2 has a cylindrical shape. The pin 2 and the leader block 1 engage with each other only in the tape width, and the upper and lower grooves serve as grooves for letting air out during engagement. The method of fixing the tape is the same as in the first embodiment.

The third embodiment will be described with reference to FIG. FIG. 4 is a perspective view of a leader block showing a third embodiment. In FIG. 4, 6 is a fixed block and 7 is a crimping block. The fixed block 6 is provided with a groove corresponding to the tape width, and the lower end surface of the groove corresponding to the tape width and the lower end surface of the fixed block 6 are accurately processed. Further, it is provided with a shaft serving as a center of rotation of the crimping block 7, a slot 8 for hooking the fixed block 6, and a recess 11 for engaging with a crimping portion of the crimping block 7. The crimping block 7 has a hole for engaging the central axis of the rotational movement provided in the fixing block 6, a convex portion for crimping the tape 3, and a convex portion for semi-fixing the tape 3 on the tape contact surface. There is. The magnetic tape 3 is sandwiched and fixed by the rotating operation of the two members of the fixed block 6 and the crimping block 7. The tape 3 includes a fixed block 6 and a crimp block 7.
Inserted from the gap between the blocks when opened (Fig. 4 (b)),
Stick the tape edge against the bottom edge of the groove for the tape width. Since the tape contact surface of the crimping block 7 is provided with a convex portion, when the block is closed (Fig. 4 (a)).
In addition, since the convex portion presses the tape until the crimping block 7 is coupled with the fixed block 6, the deviation during the crimping can be prevented. Here, although the method of fixing the magnetic tape by the rotating operation of the fixing block 6 and the pressure-bonding block 7 is adopted, there is no problem in the method of fixing the magnetic tape by fitting the two blocks.

[0012]

According to the present invention, it is possible to obtain a magnetic tape cartridge which secures the accuracy of attaching the tape to the leader block. As a result, it is possible to improve the tape life and to achieve high reliability in signal recording / reproduction of the one-reel type magnetic tape device.

[Brief description of drawings]

FIG. 1 is a perspective view of a leader block showing a first embodiment.

FIG. 2 is a perspective view of a conventional magnetic tape cartridge.

FIG. 3 is a perspective view of a leader block showing a second embodiment.

FIG. 4 is a perspective view of a leader block showing a third embodiment.

[Explanation of symbols]

 1 Leader Block 2 Pin 3 Magnetic Tape 4 Tape Cartridge 5 Leader Block Drawout Pin 6 Fixed Block 7 Crimping Block 8 Slot 9 Flange 10 Reference Surface 11 Recess

Claims (1)

[Claims] 1. A leader block provided at a starting end of the magnetic tape, the leader block having an opening for engaging a magnetic tape and a threader pin for guiding the magnetic tape, and the engagement of the magnetic tape with the leader block. A magnetic tape cartridge having an engaging member for carrying out the above, wherein the leader block has a gripping portion for gripping the engaging member and a groove substantially corresponding to the tape width.