JPH021693Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a head adjustment device, and is particularly suitable for application to a sheet recording device.

[Background technology and its problems]

As shown in FIGS. 1 and 2, the sheet recording device basically includes a circular sheet 4 as a recording medium whose center hole 1 is engaged with a rotor 3 attached to the output shaft of a motor 2. The sheet 4 is held between the head 5 and the pad 6 having a U-shaped cross section.
and the seat 4 by running between the pads 6
Concentric recording tracks 7 are formed on top. The position of the head 5 is controlled in the radial direction of the sheet 4 (this is referred to as the X-axis direction) so that it can track a large number of concentrically formed recording tracks 7. Here, the track 7 formed on the sheet 4 has, for example, a track width of 60 [μm] and a pitch of 100 [μm].
[μm], and the guard band is selected to be approximately 40 [μm]. Therefore, the adjustment of the contact of the head 5 with the sheet 4 also requires precision on the order of several [μm].

However, in the conventional sheet recording apparatus of this type, the adjustment of the contact of the head 4 is mainly done by adjusting the relative position and direction of the pad 6 with respect to the head 5, so as to obtain the best contact condition of the head 5. The degree of freedom in adjusting the head 5 itself was about two. Therefore, it has been difficult to accurately adjust the overall contact between the inner circumferential portion having a small radius and the outer circumferential portion having a large radius.

[Purpose of invention]

The present invention aims to provide a compact head adjusting device that can greatly increase the degree of freedom in adjusting the head.

[Summary of the idea]

In order to achieve this purpose, in this invention,
The movable plate part is made by attaching a head to the tip of the bent end of the L-shaped board part through the constriction part, and the flexibility of this constriction part is used to enable adjustment in multiple directions. .

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.
In this embodiment, the head 11 is connected to the track 1 of the sheet 12 extending in the horizontal direction, as shown in FIG.
On an imaginary line 14 (extending in the X-axis direction) in the radial direction perpendicular to 3, the line passes through approximately half of the track area in a direction perpendicular to the line 14 (this direction is the Y-axis direction). It is mounted on a rotating arm plate 15 that can assume an extended reference rotating position, and the head is directed upward from this rotating arm plate 15 (this direction is defined as the Z-axis direction). The rotating arm plate 15 is rotated in the X-axis direction around the reference position in the range of rotational positions 15A to 15B, thereby allowing the head 11 to track all the tracks 13 in the track area of the seat 12. ing.

The above configuration is basically the same as that described above with reference to FIGS. 1 and 2, but in this embodiment, the head 11 is connected to the rotary arm plate via the head adjustment table 21 shown in FIGS. 4 to 8. It is mounted on 15.

The head adjustment table 21 is mounted on a rotating arm plate 15 which is pivotally connected to a rotating support shaft 23 installed on a base 22. The rotating arm plate 15 extends across the sliding bases 24L and 24R extending in the front-rear direction, and is slidably held on the upper surface thereof. In this embodiment, guide plates 25L and 25R are provided so as to bridge approximately parallel to the upper surfaces of the sliding tables 24L and 24R, and a sliding contact 27 at the tip of a spring 26 fixed to the upper surface of the rotating arm plate 15 is provided. is information board 25
The rotating arm plate 15 is pressed against the upper surfaces of the sliding bases 24L and 24R, and rotates with high precision while being regulated.

The head adjustment table 21 has a substrate portion 3 having an L-shaped longitudinal section.
1 and a plate-shaped movable plate portion 33 fixed to the bent end portion 31A thereof so as to face substantially parallel to the flat plate portion 31B of the substrate portion 31 through the constriction portion 32, and It is mounted on the rotating arm plate 15 with mounting screws 36 (FIG. 4) using mounting holes 35 (FIG. 7) drilled in a mounting plate portion 34 that protrudes rearward from the rear. Also, the movable plate portion 33
A head base 38 having the head 11 fixed to its upper end is held on the front surface of the head by a screw 39 so that it can be slightly shifted in the vertical direction.

Here, the head adjustment table 21 adjusts the plate surface of the base plate 31 as shown in FIGS. 4 to 8 together with orthogonal coordinates.
It is mounted on the rotating arm plate 15 so as to extend in the YZ plane, and as the rotating arm plate 15 rotates in the front-rear direction, the head 11 is placed approximately on the line 14 in the radial direction of the seat 12 (FIG. 3). It is made to be portable. This movement is performed by an actuator 39 that abuts the front surface of the free end 15A of the rotating arm plate 15 (FIG. 4). Incidentally, the free end 1 is attached to the rotating arm plate 15 by a spring 40.
A biasing force is applied so that the actuator 5A comes into contact with the actuator 39, and this changes the rotational position of the rotary arm plate 15 and the seat of the head 11 according to the position of the actuator 39 in the longitudinal direction (X-axis direction). The opposing position will be determined.

The head adjustment table 21 is configured to rotate in the direction of rotation around the X axis (referred to as the X _rpt direction), the direction of rotation around the Y axis and the Y axis (referred to as the Y _rpt direction), and the direction of the Z axis and the direction of rotation around the Z axis (referred to as Z _rpt ).
It has 5 degrees of freedom to adjust.

First, in the Y _rpt direction, the taper screws 42L and 42R are inserted forward from the screw holes drilled through the thickness of the movable plate part 33 so that the taper surfaces are in contact with the left and right edges of the head base 38. It is placed in a protruding position. Hexagonal holes are provided in the heads of the tapered screws 42L and 42R, and the base plate portion 31
The protrusion amount of the taper screws 42L and 42R can be adjusted from the rear with a rod wrench through the through holes 43L and 43R passing through the holes (Fig. 6). If the amount is increased, the head base 38 and hence the head 11 will rotate in the clockwise (or counterclockwise) direction in _FIG .
Balance can be adjusted.

Second, in the Y direction, set the countersunk screw 45L so that the tapered surface is in contact with the left and right edges of the mounting plate portion 34.
and 45R are screwed into the rotating arm plate 15, and the right flat head screw 45R (or the left flat head screw 45
By increasing the screw-in amount of L), the mounting plate 34 can be pressed to the left (or right) in FIG. (Y direction), thereby adjusting the gap position of the head 11.

Thirdly, in the Y _rpt direction, the push screw 47 is inserted forward from the screw hole drilled through the thickness of the upper end 48 of the base plate 31 so that the tip is in contact with the back surface of the upper end of the movable plate 33. It is placed prominently.
A hexagonal hole is provided in the head of this push screw 47,
The amount of protrusion of the push screw 47 can be adjusted from the rear with a rod wrench, and by varying the distance between the movable plate part 33 and the base plate part 31, the movable plate part 33 can be tilted forward about the constriction part 32. The forward tilt of the head 11, that is, the amount of tilting can be adjusted by tilting the head 11 so that the constricted portion 32 is tilted.

Fourthly, in the Z direction, a locking through hole 51 is provided at the lower end of the head base 38.
Taper screws 52U and 52D are provided so as to protrude forward from screw holes drilled through the thickness of the movable plate portion 33 so that their tapered surfaces abut against the lower edge of the movable plate portion 33 and the lower edge of the head base 38. There is. The heads of the tapered screws 52U and 52U are provided with hexagonal holes, and the tapered screws 52U and 52U are inserted into the through holes 53U and 53D that pass through the base plate 31 from behind using a rod wrench.
The amount of protrusion of the lower tapered screw 52D (or the upper tapered screw 52U) can be adjusted so that the head base 38 and therefore the head 11 will slide upward (or downward). , whereby the protrusion of the head 11 relative to the sheet can be adjusted.

Fifthly, regarding the Z _rpt direction, the movable plate part 33 is inserted from the rear direction through through holes drilled at the left and right positions of the central part of the base plate part 31 in the Z direction (that is, the vertical direction).
Pull screws 54L and 54R are screwed into. The countersunk heads of the draw screws 54L and 54R are rotatably held in the receiving holes of the base plate 31, and by increasing the screwing amount of the right screw 54R (or the left screw 54L), a pair of screws sandwiching the constricted portion 32 can be opened. By varying the distance between the movable plate part 33 and the base plate part 31 in the position, the movable plate part 33 deforms the constriction part 32 in a twisting manner and moves counterclockwise (or clockwise) in the horizontal plane in FIG. rotate,
This allows the azimuth of the gap of the head 11 to be adjusted.

In the above configuration, the head 11 is adjusted according to the following procedure.

First, in order to improve the contact of the head 11 with the seat 12, the first step is to tighten the protruding adjustment taper screw 52U.
and 52D to adjust the protrusion amount of the head 11 with an accuracy of, for example, ±1 [μm]. Second, operate the R balance taper screws 42L and 42R to adjust the R balance of the head 11 to, for example, ±10 [μm]. Adjust with an accuracy of about 1 second.
7 to adjust the amount of tilting of the head 11 with an accuracy of, for example, ± several seconds. After adjusting the contact with the seat 12 to the standard state in this way, the gap position of the head 11 is adjusted by operating the flat head screws 45L and 45R for gap position adjustment in order to ensure compatibility of the seat 12. For example, the azimuth angle of the gap of the head 11 is adjusted by operating the azimuth adjustment draw screws 54L and 54R, for example, with an accuracy of about ±5 [μm].

According to the embodiment described above, adjustment can be made with five degrees of freedom, and the head can be adjusted in a manner that is sufficiently satisfactory for practical purposes. In this way, the movable plate part 33 is connected to the base plate part 31.
Since it is configured to extend through the constricted portion 32, the flexibility of the constricted portion 32 can be utilized to realize adjustment operations in multiple directions with a relatively compact configuration. Incidentally, rotational adjustments such as Y _rpt direction tilt adjustment and Z _rpt azimuth adjustment are generally difficult, but according to the above configuration, tilt deformation of the constriction portion 32,
This can be easily achieved using twist deformation.

The remaining adjustment in the X-axis direction is performed using the head adjustment table 21.
This can be achieved by adjusting the rotational position of the rotation arm plate 15 on which the rotation arm plate 15 is placed.

[Effect of idea]

As described above, according to the present invention, the movable plate is connected to the bent end of the base plate having an L-shaped cross section through the constriction, and the head is attached to the tip of the movable plate. The tilting amount and azimuth angle of the head can be adjusted by using the tilting and twisting deformations of the constricted portion, and it is therefore possible to easily obtain a compact head adjustment device that can adjust the head with a large degree of freedom. .

[Brief explanation of the drawing]

1 and 2 are a plan view and a side view showing a conventional head adjustment device, FIG. 3 is a schematic diagram illustrating the operation of a rotating arm plate for positioning the head relative to the seat, and FIG. FIG. 4 is a perspective view showing a configuration in which the head adjustment device according to the present invention is attached to a rotating arm plate, and FIGS. 5, 6, 7, and 8 are examples of the head adjustment device according to the present invention, respectively. They are a front view, a right side view, a top view, and a rear view. 11...Head, 12...Seat, 15...Rotating arm plate, 21...Head adjustment stand, 24L, 2
4R...Sliding table, 25L, 25R...Guidance board, 3
DESCRIPTION OF SYMBOLS 1... Board part, 32... Neck part, 33... Movable plate part, 34... Mounting plate part, 38... Head base, 39... Actuator, 40... Spring, 42
L, 42R...R balance adjustment taper screw, 4
5L, 45R...Gap position adjustment flats screw, 4
7... Push screw for tilting, 52U, 52D... Taper screw for adjusting protrusion, 54L, 54R... Draw screw for adjusting azimuth.

Claims (1)

[Claims for Utility Model Registration] A base plate portion having an L-shaped cross section and having a bent end portion at one end of the flat plate portion, and a substrate portion disposed to face the flat plate portion and having a constricted portion interposed in the bent end portion. a movable plate portion having a head attached to its tip; and a movable plate portion having a head attached to the tip thereof; and the amount of tilting of the head is adjusted by changing the distance between the movable plate portion and the flat plate portion to tilt the constricted portion. a tilt adjustment means; and adjusting the azimuth angle of the gap of the head by changing the distance between the movable plate part and the flat plate part at a pair of positions sandwiching the constriction part, thereby twistingly deforming the constriction part. A head adjustment device comprising: azimuth angle adjustment means;