JP3052277B2 - Moving body drive mechanism in media processing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a medium processing apparatus.
Regarding the moving body drive mechanism, especially read on magnetic recording media etc.
It is useful for driving a moving body such as a magnetic head for writing.
You.

[0002]

2. Description of the Related Art A magnetic head will be described below as an example of a moving body, but is not limited to this. A magnetic head moving mechanism in a conventional medium processing apparatus will be described with reference to FIG. As shown in FIG. 8A, a screw shaft 1 used in a conventional magnetic head moving mechanism is configured such that a screw 2 is chopped at a constant lead angle α and a constant pitch L to form a constant lead. . The state in which the lead is constant is shown by the relationship between the position of the screw shaft 1 and the lead of the screw 2 in FIG.

FIG. 8 (c) shows the relationship between the time from the start of the motor for driving the magnetic head and the moving speed of the magnetic head. During this period, the moving speed of the magnetic head is not constant. During this period, reading / writing of the magnetic recording medium is not performed, and reading / writing starts when the moving speed becomes constant.

[0004]

However, in the screw shaft of the above-mentioned conventional medium processing apparatus, the moving distance of the magnetic head from the start of the movement of the magnetic head to a constant moving speed is as shown in FIG. Since there is the distance indicated by the hatched portion C in c), the screw shaft is extra-longened by the moving distance for proper reading of the magnetic recording medium. For this reason, there is a problem that the medium processing device itself becomes large, which also hinders downsizing of the medium processing device.

Further, if the screw shaft is made extra long as described above, the screw shaft is more likely to bend, and the material cost of the screw shaft is increased in order to suppress this bending.

[0006]

Accordingly, the present invention provides a lead
Increasing the lead angle toward the screw part with a constant angle
Screw shaft with larger screw
And by rotating this screw shaft
Moves along the screw in the axial direction of the screw shaft
To rotate the screw shaft
When the motor is started, the rotation speed of the motor
Until the lead angle of the screw gradually increases
The moving body is driven by the part, and the rotation speed of the motor becomes constant.
After that, move the screw with the fixed lead angle
Medium processing characterized in that it drives
Provided is a moving body driving mechanism in a processing device. Also Lee
The lead angle gradually increases toward the screw part with a constant angle
Forming a screw that becomes larger
At the other end of the screw part where the angle gradually increases
Screws forming a screw part with a small lead angle
Rotating the shaft and this screw shaft
Along the screw in the axial direction of the screw shaft.
And a moving body that moves by rotating the screw shaft.
When the motor to rotate is started, the rotation speed of the motor
Until the value becomes constant, screw part with small lead angle
In the part of the screw where the minute and the lead angle gradually increase
Drive the moving body and wait until the motor rotation speed becomes constant.
Drives the moving body with the screw part with a fixed lead angle
Media processing apparatus characterized in that the configuration is such that
And a moving body driving mechanism.

[0007]

According to the present invention, the lead angle is constant.
The lead angle gradually increases toward the screw part
The screw shaft that forms the screw
Since a moving body such as a magnetic head is driven,
Useless drive time movement until the rotation speed of the motor becomes constant
Shorter distance and shorter screw shaft than before
Media processing.
The processing device can be reduced in size.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below with reference to the drawings, taking a magnetic head as an example of a moving body. In FIG. 1A,
3 shows a screw shaft 3 used for a magnetic head moving mechanism in the medium processing apparatus of the present invention.

The screw shaft 3 forms the screws 4 at a constant pitch L. This screw 4
Increases the lead angle α toward the lead direction,
A certain lead angle α is set from the middle. The timing for making the lead angle α constant is set to the time when the motor starts up. In the figure, a screw 4 having a small lead angle α is provided constantly from the end of the screw shaft 3, and the lead angle α is gradually increased before the motor starts up, so that it becomes constant when the motor starts up.

This situation is shown in FIG. 1B in terms of the relationship between the position of the screw shaft 3 and the lead. Here, the portion from the left end to the position A in the figure is referred to as the variable screw portion 4a, and the portion from the position A to the right end is referred to as the screw portion 4b. In the magnetic head moving mechanism using the screw shaft 3 having the above configuration, the time (s) from the start of the motor and the moving speed of the magnetic head (mm / mm) shown in FIG.
The magnetic head moves along the screw shaft 3 along the screw shaft 3 by the distance corresponding to the area indicated by the hatched portion B by the time t until the motor rises from the solid line graph showing the relationship with the variable s).

For this reason, the solid line is lower than the broken line representing the conventional case where the lead angle α is always constant.
During this time, the moving speed of the magnetic head is slow, and the moving distance is short. In the above description, the variable screw unit 4
Although a is used in which the lead angle α is gradually increased after providing a fixed small lead angle at one end of the screw shaft 3, it may be gradually increased from the beginning.

In addition, although the one in which the moving speed of the magnetic head is controlled by changing the lead angle α is used, the one in which the pitch L is changed as shown in FIG. As shown, both the lead angle α and the pitch L may be varied. Further, it is preferable that the moving distance of the magnetic head is designed to be as short as possible until the motor starts up.

Further, as shown by the two-dot broken line in FIG. 1B, before the rotation speed of the motor becomes constant, the leads are sequentially changed so that the moving speed of the moving body becomes a predetermined constant speed. The start time of reading / writing of the magnetic head may be advanced by adjusting the time. FIG. 4 shows an example in which the medium processing apparatus of the present invention is used in, for example, an airline ticket issuing machine.

In the air ticket issuing machine 5, air tickets 6, which are mediums, are sent one by one from a hopper section 7 to a medium running path 9 by a separation roller 8 in accordance with a ticket issuing command from a higher-level device (not shown), and are directed in the direction of arrow 10. It is conveyed and sent to the magnetic encoding unit 11. After writing and reading the magnetic information of the airline ticket 6, the magnetic encoding unit 11 sends the magnetic information to the medium traveling path 9 again, conveys the medium traveling path 9 in the direction of arrow 10, and sends the medium to the printing unit 12.

The printing unit 12 performs predetermined printing on the airline ticket 6 and sends it to the discharge roller 13. The discharge roller 13 discharges the air ticket 6 to a discharge stacker 14.
As shown in FIG. 5, the air ticket 6 has a magnetic stripe portion 15, which reads and writes magnetic information on the magnetic stripe portion 15. It is designed to be transported.

FIG. 6 is a schematic configuration diagram of a magnetic encoding unit 11 using the screw shaft 3 of FIG. In the magnetic encoding unit 11, the magnetic stripe unit 15 of the air ticket 6 is read and written by running the magnetic head 16. The magnetic head 16 is mounted on a head bracket 19 that moves in the direction of arrow 18 along a guide shaft 17.

In the head bracket 19, the screw shaft 3 is passed through a shaft receiver 20, and a guide pin 21 fixed to the head bracket 19 is fitted into a spiral groove of the screw shaft 3 as shown in FIG. Is combined with The screw shaft 3 is arranged such that the magnetic stripe portion 15 comes to a place where the lead angle α is constant, and the portion where the lead angle α is changed is arranged on the starting start side of the magnetic head 16. Reading and writing can be performed at a predetermined constant speed.

When the motor 22 is rotated, its rotational force is transmitted from the pulley 23 to the pulley 25 via the drive belt 24, and the screw shaft 3 is rotated in the direction of arrow 26 so that the guide pin 21 is formed into a spiral groove. Arrow 2 along
By moving in the seven directions, the magnetic head 16 travels for reading and writing. According to the embodiment described above, in the magnetic encoding unit 11, when the motor 22 starts up, the magnetic head 16 moves along the screw shaft 3 for a shorter distance than when reading or writing, and at a predetermined constant speed during reading or writing. The head 16 can be moved.

[0019]

As described above, the moving body driving mechanism in the medium processing apparatus of the present invention has a screw with a fixed lead angle.
Screw that gradually increases the lead angle toward the
The screw shaft that forms the head has a magnetic head.
To move mobile objects such as

Therefore, the rotation speed of the motor becomes constant.
Useless drive time up to the screw to reduce the travel distance
Shafts can be shortened compared to conventional models.
The effect of reducing the size of the media processing device is obtained.
It is also expected that the production cost of the media processing equipment will be reduced.
You.

[0021]

[Brief description of the drawings]

FIG. 1 is an explanatory view of a screw shaft used in a medium processing apparatus according to the present invention.

FIG. 2 is an explanatory view of another screw shaft.

FIG. 3 is an explanatory view of another screw shaft.

FIG. 4 is a schematic configuration diagram showing an example in which the medium processing device of the present invention is used in an air ticket issuing machine.

FIG. 5 is an explanatory diagram of an airline ticket.

FIG. 6 is a schematic configuration diagram of a magnetic encoding unit using the screw shaft of FIG.

FIG. 7 is an explanatory diagram of a connection state between a head bracket and a screw shaft.

FIG. 8 is an explanatory diagram of a screw shaft used in a conventional medium processing apparatus.

[Explanation of symbols]

 3 Screw Shaft 4 Screw α Lead Angle L Pitch 5 Air Ticket Issuer 6 Air Ticket 11 Magnetic Encoding Section 27 Guide Pin

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-62-154275 (JP, A) JP-A-4-360076 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G11B 21/02

Claims (2)

(57) [Claims] (1) A lead angle is suitable for a screw part having a constant lead angle.
Formed a screw with a gradually increasing lead angle
Screw shaft and rotating this screw shaft
The screw shaft in the axial direction.
A moving body that moves along the crown and starts a motor that rotates the screw shaft.
The lead angle until the motor rotation speed becomes constant.
Drives moving body with gradually increasing screw part
However , after the motor rotation speed becomes constant, the lead angle
The moving body is driven by the fixed screw.
And a moving body driving mechanism in the medium processing apparatus. (2) The lead angle is suitable for a screw part having a constant lead angle.
To form a screw with a progressively larger lead angle,
In addition, the lead angle of the screw gradually increases
At the other end of the part, screw part with small lead angle
The formed screw shaft and this screw shaft
By rotating the screw shaft
And a moving body that moves along the screw in the direction, and a motor for rotating the screw shaft is started.
The lead angle until the motor rotation speed becomes constant.
Screw part and lead angle gradually become smaller
The moving body is driven by the screw part, and after the rotation speed of the motor becomes constant, the lead angle becomes
The moving body is driven by the fixed screw.
And a moving body driving mechanism in the medium processing apparatus.