JPH0660528A - Device for automatically adjusting opposed gap of magnetic head - Google Patents

Abstract

PURPOSE:To automatically adjust the opposed gap of a magentic head by driving a pulse motor without necessitating work by an operator at the time of adjusting the gap by driving the pulse motor so that a moving mechanism may be driven. CONSTITUTION:As to the moving mechanism 15 for moving a supporting mechanism 14, a small-diameter rotary shaft 22 projected at one end of an eccentric shaft 19 is allowed to horizontally pierce to the other end face side of a frame 18 through the shaft supporting part 23 of the frame 18. A driven gear 24 is fitted out and fixed at the part of the piercing shaft 22. A driving gear coupled with the pulse motor is meshed with the driven gear so as to freely move, and the pulse motor is driven by a fixed amount. Thus, the shaft 19 integrated with the shaft 22 is somewhat rotated through each gear 24, and a pad roller 13 integrated with an inverse L-shaped arm 20 is moved by a fixed amount in the corresponding direction of the magnetic head 12 with the eccentric rotation of the shaft 19.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head facing gap adjusting device internally constructed in an automatic ticket gate for automatically ticketing magnetic media such as tickets and commuter passes. The present invention relates to a device for automatically adjusting a facing gap of a magnetic head capable of automatically adjusting the gap.

[0002]

2. Description of the Related Art Generally, a magnetic head device of this type is disclosed in Japanese Patent Application No. 1-58910 and Japanese Patent Application No. 3-44.
As shown in No. 146, the facing gap between the magnetic head and the pad roller, which are opposed to each other with the transport passage sandwiched therebetween, is regularly inspected and adjusted to an appropriate facing gap.

However, since the degree of wear of each magnetic head varies depending on the frequency of use of each magnetic head, the periodic cycle of maintenance and inspection for this clearance adjustment is unclear, and the optimum maintenance and inspection date cannot be set. In addition, each time the clearance is adjusted, a staff member must manually handle the inside of the device by hand to adjust the clearance.

[0004]

SUMMARY OF THE INVENTION Therefore, according to the present invention, when the facing gap of the magnetic head is adjusted, the gap between the magnetic heads can be automatically adjusted by driving the pulse motor without the need for staff work. The purpose is to provide an adjusting device.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a facing gap adjusting device for a magnetic head, which adjusts a facing gap between a magnetic head and a contact roller, which are opposed to each other with a conveying path for a magnetic medium interposed therebetween. A magnetic head including a support member that supports the contact roller, a moving mechanism that moves the contact roller in the opposite direction of the magnetic head via the support member, and a pulse motor that applies a driving force to the moving mechanism. It is characterized in that it is an automatic facing gap adjusting device.

Further, there is provided a facing gap adjusting device for a magnetic head, which adjusts a facing gap between a magnetic head and a facing roller, which are opposed to each other with a magnetic medium transport path interposed therebetween, and a supporting member for supporting the facing roller. A roller displacement amount detection sensor for detecting a displacement amount of the contact roller corresponding to the magnetic medium when the contact roller is in contact, and a moving means for moving the contact roller in the corresponding direction of the magnetic head via the support member. An automatic facing gap adjusting device for a magnetic head, comprising: a gap adjusting control means for driving the moving means based on the sensor value of the roller displacement amount detecting sensor to move and adjust the contact roller to an optimum facing gap amount. Is characterized in that.

Further, there is provided a facing gap adjusting device for a magnetic head, which adjusts a facing gap between a magnetic head and a contact roller, which are opposed to each other with a magnetic medium conveying path interposed therebetween, and a supporting member for supporting the contact roller. A support member deflection amount detection sensor for detecting the amount of deflection of the support member that is deflected via the contact roller when contacting with the magnetic medium, and a moving means for moving the contact roller in the corresponding direction of the magnetic head. , Automatic gap adjustment of the magnetic head, which includes a gap adjustment control unit that drives the moving unit to move and adjust the contact roller to an optimum facing gap amount based on the sensor value of the support member bending amount detection sensor. It is a device.

[0008]

According to the present invention, when it is necessary to adjust the facing gap between the magnetic head and the contact roller, the pulse motor is driven to drive the moving mechanism so that the contact roller moves in the facing direction of the magnetic head. To adjust the facing gap to a predetermined amount.

Further, the gap adjustment control means determines the necessity of the gap adjustment on the basis of the sensor value of the roller displacement amount detection sensor, and when the adjustment of the facing gap is required, the moving means is driven. Move the contact roller in the gap adjustment direction,
Automatically adjusts to the optimum facing gap amount.

Further, the gap adjustment control means determines the necessity of the gap adjustment on the basis of the sensor value of the support member deflection amount detection sensor, and when the facing gap needs to be adjusted, the moving means is driven. The contact roller is moved in the gap adjustment direction to automatically adjust to the optimum facing gap amount.

[0011]

Therefore, when adjusting the facing gap between the magnetic head and the contact roller, the optimum gap adjustment can be easily performed by driving the pulse motor by the gap adjustment amount.

In particular, since the roller displacement amount detecting sensor or the supporting member bending amount detecting sensor detects the wear state of the magnetic head, it is possible to clearly know the adjustment time of the facing gap, and the detected sensor value is the gap adjustment. If it is a necessary value of, it is possible to output the necessary adjustment amount and automatically adjust to the optimum facing gap amount.

Further, since the contact roller is automatically moved by the moving means, it is possible to omit the manual clearance adjustment by the staff.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. The drawings show a device for automatically adjusting a facing gap of a magnetic head which is internally provided in an automatic ticket gate.
In the embodiment, the automatic facing gap adjusting device 11 for the magnetic head includes a magnetic head 12, a pad roller 13 provided opposite to the magnetic head 12 with a facing gap L, and the pad roller 1.
3, a support mechanism 14 for supporting the magnetic head 3, a moving mechanism 15 for moving the pad roller 13 for each support mechanism 14 in the direction opposite to the magnetic head 12, and a pulse motor M1 for applying a driving force to the moving mechanism 15.

The magnetic head 12 is disposed below with a transportation path for a ticket being provided, and a pad roller 13 is provided above the magnetic head 12, so that a ticket, a commuter ticket, a boarding card, etc., carried in between the magnetic heads 12 are provided. The magnetic head 12 contacts the magnetic recording surface to write and read magnetic data. Also, magnetic head mounting holes 16 and 16 are opened in the lower part, and screws 1
It is fixedly installed on the frame 18 through 7, 17, and the pad roller 13 above the fixed magnetic head 12 is used as a reference.
The side is allowed to move in the vertical direction via a support mechanism 14 described later.

The support mechanism 14 is composed of an eccentric shaft 19 horizontally supported by a vertical wall-shaped frame 18 and an inverted L-shaped arm 20 fitted on the eccentric shaft 19.
With the hanging portion of the inverted L-shaped arm 20, the pad roller 13
Of the pad roller 13 is rotatably supported, and the other end of the pad roller 13 is engaged with a vertically elongated slot 21 formed in the frame 18 to rotatably be supported. The pad roller 13 is also supported so as to be vertically movable integrally with the movement.

A moving mechanism 15 for moving the support mechanism 14 is provided with a small-diameter rotary shaft 2 protruding from one end of an eccentric shaft 19.
2 through the shaft support 23 of the frame 18
Of the small-diameter rotary shaft 22 that extends through the other side of the driven gear 24, and the drive gear 25 connected to the pulse motor M1 meshes with the driven gear 24 so that the driven gear 24 is freely rotatable. By driving the motor M1 by a fixed amount,
The eccentric shaft 19 integrated with the small-diameter rotary shaft 22 is slightly rotated through the gears 24 and 25. With the eccentric rotation of the eccentric shaft 19, the pad roller 13 integrated with the inverted L-shaped arm 20 corresponds to the magnetic head 12. Move a certain amount in the direction.

Therefore, when adjusting the facing gap L between the magnetic head 12 and the pad roller 13, it is sufficient to drive the pulse motor M1 by the gap adjustment amount, and the optimum gap adjustment can be performed automatically. .

FIG. 3 shows an automatic facing gap adjusting device 31 for a magnetic head according to a second embodiment of the present invention, which comprises a magnetic head 32 and a pad roller 33 opposed to the head with an facing gap L therebetween. A supporting mechanism 34 for supporting the pad roller 33, a moving mechanism 35 for moving the pad roller 33 together with the supporting mechanism 34 in a direction opposite to the magnetic head 32, and a roller displacement amount detecting sensor S1 for detecting the displacement amount of the pad roller 33. It consists of.

The above-mentioned support mechanism 34 is configured to support the pad roller 33 above the magnetic head 32, which is fixedly installed, via a tilt lever 36, and the tilt lever 36 is a fulcrum at one end. A pin 37 is provided with a tilt fulcrum allowing the other end to be tilted, and the fulcrum pin 37 is pivotally attached to a frame (not shown). A horizontal piece 38 for projecting the tilting motion is provided on the.

Moving mechanism 3 for moving the support mechanism 34
Reference numeral 5 engages one end of the tilting lever 36 with one end of an urging spring 39 supported by the frame to urge and support the lever 36 downward, and resist the urging force of the urging spring 39. A lead screw type pulse motor M2 is provided so as to face the horizontal piece 38 on the other end side of the lever from below and press it upward. Then, by driving the pulse motor M2 by a certain amount, the tilt lever 36 is moved through the horizontal piece 38.
Is slightly tilted, and with this tilt, the pad roller 33 integrated with the lever 36 is moved by a certain amount in the corresponding direction of the magnetic head 32. Further, a shock absorber 40 is attached to the other end of the tilting lever 36 to absorb and eliminate the unstable movement of the tilting lever 36.

Further, the tilting lever 36 is supported in a substantially horizontal state, and a roller displacement amount detecting sensor S1 using a laser detecting sensor for detecting the laser on the upper surface of a horizontal piece 38 provided along the lever 36 is arranged. By detecting the inclination of the horizontal piece 38 with a laser, the CPU, which will be described later, detects the amount of displacement based on the inclination of the tilt lever 36, and the pad roller 33 moves up and down when the ticket passes. Then, the adequacy of the facing gap L between the magnetic head 32 and the pad roller 33 is determined from this displacement amount.

FIG. 4 is a block diagram of a control circuit of an automatic facing gap adjusting device 31 for a magnetic head according to the second embodiment.
Reference numeral 41 controls each circuit device according to a program stored in the ROM 42, and the control data is stored in the RAM 43 so as to be readable.

The processing operation of the facing gap automatic adjusting device 31 of the magnetic head of the second embodiment having the above-mentioned structure will be described below. Normally, a magnetic head 3 built inside an automatic ticket gate
2 is, every time the customer inserts a ticket or ticket
Magnetic data processing is performed in contact with the magnetic recording surface.

During this data processing, the roller displacement amount detection sensor S1 fluctuates when the passenger passes by the pad roller 33.
The displacement amount of C is detected, and C is detected based on the detected sensor value.
When the PU 41 determines the necessity of adjusting the clearance and determines that the detected displacement amount is largely displaced due to the wear of the magnetic head 32, the CPU 41 does not properly process the magnetic data of the boarding ticket. The output value to the pulse motor M2 that can be restored to an appropriate value is calculated according to the degree of displacement of 33, and the value obtained by this calculation is output to the pulse motor M2. As a result, the pad roller 33 is tilted by a predetermined amount together with the tilt lever 36, and the optimum facing gap L is automatically adjusted.

If the sensor value is within the proper range, the CPU 41 is in a state in which the magnetic data processing can be properly performed on the ticket. Therefore, the CPU 41 does not output the pulse motor M2 to the magnetic data processing as it is. To execute.

FIG. 5 shows an automatic facing gap adjusting device 51 for a magnetic head according to a third embodiment of the present invention, which is composed of a magnetic head 52 and a pad roller 53 opposed to the head with an facing gap L therebetween. The support mechanism 54 that supports the pad roller 53, the movement mechanism 55 that moves the pad roller 53 together with the support mechanism 54 in the direction opposite to the magnetic head 52, and the amount of bending of the L-shaped arm 56 that supports the pad roller 53 are detected. It is composed of an arm bending amount detecting sensor S2.

The above-mentioned support mechanism 54 is configured to support the pad roller 53 above the magnetic head 52, which is fixedly installed, via the L-shaped arm 56, and the L-shaped arm 56 has an intermediate position. A fulcrum pin 57 that pivotally supports the L-shaped bent portion at the position is provided with a tilting fulcrum allowing the free end side to be tilted, and the fulcrum pin 57 is pivotally attached to a frame (not shown) and attached to the L-shaped horizontal arm 56a. The pad roller 53 is rotatably and pivotally attached to the end on the side of the L-shaped vertical arm 56b.
An eccentric driven gear 58 for transmitting tilting power is pivotally supported at the side end portion.

A moving mechanism 55 for moving the support mechanism 54 is freely rotatable by engaging an eccentric driven gear 58 mounted on one side of the L-shaped arm 56 with a drive gear 59 connected to a worm gear type pulse motor M3. Is installed in the gear 5 and the pulse motor M3 is driven by a fixed amount to drive each gear 5
The L-shaped arm 56 is slightly tilted via 8, 59, and with this tilting, the pad roller 53 integrated with the lever 56 is moved by a certain amount in the corresponding direction of the magnetic head 52.

Further, an arm bending amount detection sensor S2 such as a strain gauge for detecting the bending amount of the L type horizontal arm 56a is arranged on the L type horizontal arm 56a of the L type arm 56,
The deflection value is detected, and the CPU, which will be described later, determines from the detected sensor value whether the facing gap L between the magnetic head 52 and the pad roller 53 is appropriate based on the inclination of the L-shaped horizontal arm 56a.

FIG. 6 shows a block diagram of a control circuit of an automatic facing gap adjusting device 51 for a magnetic head according to the third embodiment.
Reference numeral 61 controls each circuit device according to a program stored in the ROM 62, and the control data is stored in the RAM 63 so as to be readable.

The processing operation of the automatic facing gap adjusting device 51 for the magnetic head of the third embodiment having the above-described structure will be described below. Normally, a magnetic head 5 built inside an automatic ticket gate
2 is, every time the customer inserts a ticket or ticket
Magnetic data processing is performed in contact with the magnetic recording surface, and during this data processing, the arm flexure amount detection sensor S2 detects the flexure amount associated with the fluctuation of the pad roller 53 which has fluctuated when the ticket was passed, and the detected sensor CPU6 based on the value
No. 1 determines the necessity of gap adjustment, and if it is determined that the detected deflection amount is largely deflected due to wear of the magnetic head 52, the magnetic data processing of the ticket is not properly performed, and therefore the CPU 61 sets L An appropriate output value to the pulse motor M3 is calculated according to the degree of bending of the die horizontal arm 56a, and the calculated value is output to the pulse motor M3. As a result, the pad roller 53 integrated with the L-shaped arm 56 is tilted by a predetermined amount, and the optimum facing gap L is automatically adjusted.

If the sensor value is within the proper range, the CPU 61 is in a state in which the magnetic data processing can be properly performed on the ticket. Therefore, the CPU 61 does not output the pulse motor M3 to the magnetic data processing as it is. To execute.

As described above, when adjusting the facing gap between the magnetic head and the pad roller, the pulse motor can be driven by the gap adjustment amount to perform the optimum gap adjustment. In particular, the wear state of the magnetic head is detected by the roller displacement amount detection sensor or arm deflection amount detection sensor, so it is possible to clearly know the adjustment time of the facing gap, and this detected sensor value is the required value for gap adjustment. If so, it is possible to output the necessary adjustment amount and automatically adjust to the optimum facing gap amount. Further, since the pad roller is automatically moved by the moving mechanism, it is possible to omit the gap adjustment manually performed by the staff.

In the correspondence between the present invention and the configuration of the above-described embodiment, the magnetic medium of the present invention corresponds to the ticket of the embodiment, and the contact roller is the pad roller 1 in the same manner.
Corresponding to 3, 33, 53, the supporting member corresponds to each supporting mechanism 1
Corresponding to 4, 34, 54, the moving means is each moving mechanism 3
5, 55, the support member deflection amount detection sensor corresponds to the arm deflection amount detection sensor S2, and the gap adjustment control means corresponds to each of the CPUs 41 and 61. It is not limited to only.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a main part of an automatic facing gap adjusting device for a magnetic head according to a first embodiment of the present invention.

FIG. 2 is a front view of a main part of an automatic facing gap adjusting device for a magnetic head according to a first embodiment of the present invention.

FIG. 3 is a front view of essential parts of an automatic facing gap adjusting device for a magnetic head according to a second embodiment of the present invention.

FIG. 4 is a control circuit block diagram of a second embodiment of the present invention.

FIG. 5 is a front view of a main part of an automatic facing gap adjusting device for a magnetic head according to a third embodiment of the present invention.

FIG. 6 is a block diagram of a control circuit according to a third embodiment of the present invention.

[Explanation of symbols]

 11, 31, 51 ... Automatic head gap adjusting device for magnetic head 12, 32, 52 ... Magnetic head 13, 33, 53 ... Pad roller 14, 34, 54 ... Support mechanism 15, 35, 55 ... Moving mechanism 36 ... Tilt lever 41, 61 ... CPU 56 ... L-shaped arm L ... Opposing gap M1, M2, M3 ... Pulse motor S1 ... Roller displacement amount detection sensor S2 ... Arm deflection amount detection sensor

Claims (3)

[Claims] 1. A facing gap adjusting device for a magnetic head, which adjusts a facing gap between a magnetic head and a facing roller, which are opposed to each other with a magnetic medium conveying path interposed therebetween, and a supporting member for supporting the facing roller. An automatic facing gap adjusting device for a magnetic head, comprising: a moving mechanism for moving the contact roller in the facing direction of the magnetic head via the support member; and a pulse motor for applying a driving force to the moving mechanism. 2. A facing gap adjusting device for a magnetic head, which adjusts a facing gap between a magnetic head and a facing roller, which are placed opposite to each other with a magnetic medium conveying path interposed therebetween, and a supporting member for supporting the facing roller. A roller displacement amount detection sensor for detecting a displacement amount of the contact roller corresponding to the magnetic medium when the contact roller is in contact, and a moving means for moving the contact roller in the corresponding direction of the magnetic head via the support member. An automatic facing gap adjusting device for a magnetic head, comprising: a gap adjusting control means for driving the moving means based on the sensor value of the roller displacement amount detecting sensor to move and adjust the contact roller to an optimum facing gap amount. . 3. A facing gap adjusting device for a magnetic head, which adjusts a facing gap between a magnetic head and a facing roller, which are placed opposite to each other with a conveying path for a magnetic medium interposed therebetween, and a supporting member for supporting the facing roller. A support member deflection amount detection sensor for detecting the amount of deflection of the support member that is deflected via the contact roller when contacting with the magnetic medium, and a moving means for moving the contact roller in the corresponding direction of the magnetic head. , Automatic gap adjustment of the magnetic head, which includes a gap adjustment control unit that drives the moving unit to move and adjust the contact roller to an optimum facing gap amount based on the sensor value of the support member bending amount detection sensor. apparatus.