JPH06223518A - Head loading device - Google Patents

Abstract

PURPOSE:To minimize changing parts for a magnetic disk checking device and to obtain the loading device capable of coping with various kinds of disks different in thickness. CONSTITUTION:The head loading device is composed of a head arm fitting part 7 and a loading mechanism 8, which are freely attachably and detachably loaded on a moving part 42 of a carriage mechanism of the checking device respectively, and are capable of coping with various kinds of disks different in thickness. Individual head arm assemblies 3a and 3b of the fitting part 7 and loading bars 523a and 523b of the loading mechanism 8 are set at accurate height for the upper side and lower side surfaces of the various kinds of disks respectively. Thus, by merely changing spacers and simply adjusting the loading mechanism, the individual heads is satisfactorily unloaded or loaded to the various kinds of disks, and an operation rate of the magnetic disk checking device is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head loading device for loading a magnetic head onto a magnetic disk in a magnetic disk inspection apparatus.

[0002]

2. Description of the Related Art A hard magnetic disk (hereinafter simply referred to as a magnetic disk or a disk) used in a computer system is inspected by a testing device for quality or performance of a magnetic medium in a manufacturing process. An outline of the magnetic disk inspection method will be described with reference to FIG. The disk 1 to be inspected is mounted on a spindle 2 and rotates. In contrast, the carriage mechanism 4, the head loading device 5 attached to the carriage mechanism 4, and the data processing unit (not shown) constitute an inspection device. A head / arm assembly (hereinafter, simply referred to as an assembly) 3 including a magnetic head (hereinafter, simply referred to as a head) 31 and a head arm 32 is attached to the loading device 5, and the carriage 31 moves the head 31 to a radius R of the disk 1. The test data is written / read on each track T _R for inspection. In order to inspect both surfaces of the disk 1 at the same time, the assemblies 3a and 3b are provided on the upper surface and the lower surface of the disk 1, respectively. In parallel, and inspecting both sides of the same disk in parallel at two locations, or two parallel heads as a burnishing head and a glide head, a burnishing process and a glide test process. What is done collectively, and further 2
A parallel head is also developed in which the glide test step and the certify step are collectively performed by using the parallel head as a glide head and a certify head.

The loading device 5 is a disk 1
FIG. 7 shows an example of the one which is gradually improved with the increase in the density and the reduction in size.
In FIG. 7, the carriage mechanism 4 includes a slide plate 41 fixed to the base board 40, a moving portion 42 that moves along the guide rails 411, a motor 43 that drives the moving portion 42, and a ball screw 44. Is the moving part
A head arm mounting portion (hereinafter simply referred to as mounting portion) 51 and a loading mechanism 52, which are fixed to 42, respectively. As shown in the detailed view, the mounting portion 51 has two mounting tools 511a and 511b, each having an inverted F-shaped cross section, opposed to each other, and a shelf 512 of two stages thereof.
The upper and lower assemblies 3a, 3b are mounted on the a, 512b by the respective mounting bases 33a, 33b, and the both fittings are screwed to the moving part 42 to fix the respective assemblies.
Next, the loading mechanism 52 fixes the support plate 521 to the moving section 42, pivotally supports the upper and lower loading arms 522a and 522b on the supporting plate 521, and loads the upper and lower loading arms at the respective tips. The bars 523a and 523b are respectively screwed by the mounting portion K and brought into contact with the lower and upper surfaces of both head arms 32a and 32b, respectively. Cam rollers 524 are provided for both loading arms, and when each loading arm is operated by scissors by its rotation, each loading bar presses both head arms by an outward action to unload each head, and an inward action is performed. The pressure is released and the heads are loaded.

[0004]

The loading device 5 described above cannot be applied to various discs of different sizes. That is, in loading / unloading, each head 31a,
It is necessary to accurately set 31b to a predetermined height (called head z height). On the other hand, the thickness of the disc varies depending on the size, and the size of 5 inches is 1.90 mm, and the size of 3.5 inches is 1.27 mm, 2.5.
Inch is 0.89 mm, thinner 0.60 mm
There are things like. On the other hand, the upper and lower shelves 512a, 512 of the mounting portion 51
Since b is fixed at an interval corresponding to a disc of a certain thickness, and similarly, the interval between both loading bars 523b and 523b is also fixed, each head has a predetermined height for discs having different thicknesses. If the height is too small, the loading is not good when the height is too large, and when the height is too small, the head may come into contact with the surface of the disk and be damaged. On the other hand, conventionally, several sets of mounting parts having shelf intervals adapted to the thicknesses of various discs and loading bars adapted to the thickness t of the mounting part K are prepared respectively, and these are exchanged for use. It corresponds. However, these replacement parts are wasteful and their replacement is time consuming and inefficient. Therefore, it is desirable to use a loading device that can replace discs of various thicknesses by reducing the number of replacement parts as much as possible to shorten the replacement time. The present invention has been made in view of the above, and an object of the present invention is to provide a loading device capable of dealing with various discs having different thicknesses with a minimum number of replacement parts.

[0005]

SUMMARY OF THE INVENTION The present invention is a head loading device, and in a magnetic disk inspecting apparatus having the above-mentioned carriage mechanism, various magnetic disks each mounted on a moving part of the carriage mechanism and having different thicknesses. It is composed of a head arm mounting portion and a loading mechanism, which are configured for the purpose. The head arm mounting part uses a mounting member detachably mounted on the moving part, a moving block fixed to the mounting member, and a spacer having a thickness corresponding to the thickness of various discs. Two support arms respectively screwed to the upper and lower surfaces of the moving block with the interposition of each, and each head arm assembly for the upper surface and the lower surface of the magnetic disk screwed to the tip of each support arm, and Engage the rear end of the support arm,
And a micrometer for adjusting the position of the magnetic head of each assembly. The loading mechanism includes a bracket fixed to the above member, two guide rails vertically fixed to the bracket, and a bracket, which is provided at the height position corresponding to various magnetic disks having different thicknesses. Two adjustable outer stoppers and two inner stoppers, each of which is biased inwardly by a spring, and translates outwardly or inwardly between the stoppers along each guide rail. Book loading arm, loading bar that is screwed to the tip of each loading arm and contacts each head arm of each assembly, and each loading arm is moved in parallel to unload each magnetic head,
Alternatively, it is configured by a loading cam mechanism.
The cam mechanism described above includes a roller provided at the rear end of each loading arm, a rotary cam that engages with each roller to move each loading arm in parallel, a motor that drives rotation of the rotary cam, and By adjusting the height position of each stopper, it is configured by a control unit that absorbs the position change generated in each roller to smoothly rotate the rotary cam and accurately stop the rotation of the motor at the angular position of unloading and loading. It

[0006]

In the above loading device, the head arm mounting portion and the loading mechanism, which are respectively provided on the moving portions of the carriage mechanism, are moved by the carriage mechanism in the radial direction of the disk. In the mounting portion, a mounting member is removably mounted on the moving portion of the carriage mechanism, and the upper and lower surfaces of the moving block fixed to this have a thickness corresponding to the thickness of the disc to be inspected. Two support arms are screwed to each other via a spacer, and each head arm of each assembly screwed to the tip of each support arm has an accurate height with respect to the upper and lower surfaces of the disk. Is set to. Further, the position of the head of each assembly is set to the same position on the track of the disk, as adjusted by the micrometer engaged with the rear end of each support arm. In the loading mechanism, the outer stopper and the inner stopper respectively provided on the bracket are adjusted so that the height position corresponds to the thickness of the disc to be inspected. The operation of the cam mechanism causes the two loading arms to move vertically or parallel to each other between the stoppers along the two guide rails. By the outward movement, the loading bar at the tip of each loading arm presses each head arm in contact with it to unload each head, and the inward movement releases the pressing. Each head is loaded. In the cam mechanism, the controller adjusts the height positions of the stoppers to absorb the positional changes generated in the rollers, so that the rotary cam rotates smoothly and stops accurately at the angular positions of unloading and loading. As described above, the loading device described above can be used for various discs having different thicknesses only by exchanging the spacer, and the mounting portion and the loading mechanism can be easily attached to and detached from the carriage mechanism. In addition to being done in a short time, the maintenance and inspection of each part is facilitated and the operation efficiency of the inspection device is improved.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an external perspective view of a part of a head loading device according to an embodiment of the present invention, FIG. 2 is a sectional view of a head arm mounting portion of FIG. 1, and FIG. 3 is a sectional view of a loading mechanism of FIG. 4 and 5 are axial sectional views of a rotary cam used in the loading mechanism 7, and FIG. 5 is a configuration diagram of a control unit. The same parts as those of the conventional loading device 5 shown in FIG. 7 are indicated by the same numbers.

In FIG. 1, the loading device 10 is
The same carriage mechanism 4 as that shown in FIG. 7 is used. However, the moving unit 42 of this embodiment has two sets of upper and lower assemblies juxtaposed to each other, and performs inspection in parallel on two surfaces of the same disk at two positions on each of the front surface and the back surface, or A type in which two parallel heads are used as a burnishing head and a glide head to perform the burnishing process and the glide test process in the same apparatus at a time, and two parallel heads are used as a glide head and a certify head. It is compatible with the format in which the test process and the certify process are performed collectively by the same device. In the following, the case of simultaneously inspecting at two locations on one surface will be described as an example, and the burnishing process and the glide test process can be collectively performed, and the glide test process and the certify process can be collectively performed. I will omit the explanation of things.

Now, here, it is assumed that the above-described simultaneous inspection of two places is performed, and the cross-sectional shape thereof is a U-shape as shown in the drawing, and the mounting member 6 is fitted with the cam lock fastener F shown in the detailed view on one of the upper surfaces thereof. Put on and take off freely,
The head arm mounting portion 7 and the loading mechanism 8 are fixed to the member 6. On the other side, a member 6'for simultaneous inspection is mounted, and a head arm mounting portion 7'and a loading mechanism 8'are fixed to it. Note that the moving direction of the moving unit 42 is the X direction.

The mounting portion 7 includes two upper and lower support arms 71a and 71b.
Head and arm assemblies 3a and 3b are screwed to the respective tips to accommodate both sides of the disk 1, and the loading mechanism 8 has two upper and lower loading arms.
81a and 81b, and the loading bars 523a and 523b screwed to the tips of the
Contact 32a, 32b. Mounting part 7 by carriage mechanism 4
And the loading mechanism 8 move together, and the heads 31a and 31b are properly unloaded and loaded onto various discs having different thicknesses by the function described below, and inspection is performed.

In the XZ section of the mounting portion 7 shown in FIG.
The support arms 71a, 71b are screwed to the upper and lower surfaces of the moving block 72 fixed to the member 6 with spacers 73, 74 by bolts 75a, 75b. In this case, even if the thickness of the disk 1 changes, the height of the lower surface of the disk 1 is
Is always constant, so the lower spacer
The 74 should be one that fits that constant height and does not need to be replaced. On the other hand, as the upper spacer 73, those corresponding to the thicknesses of various discs are prepared, and a spacer suitable for the disc to be inspected is selected and used. Next, the bracket 76 is fixed to the moving block 72, the micrometers 77a and 77b are attached to the bracket 76, and the tips thereof are engaged with the rear ends of the support arms 71a and 71b. Further, pins p are implanted in the moving block 72, and as shown in the XY cross section, the bolt holes of each support arm and the fitting holes for each pin p are made elliptical, and each micrometer is used to make an X direction of both heads 31a, 31b. The support arms are fixed by adjusting the positions so that they are the same.

In FIG. 3, the loading mechanism 8 attaches an L-shaped bracket 82 consisting of support plates 82a and 82b to the member 6 and vertically fixes two guide rails 83a and 83b to the support plate 82a. On each loading arm 81a,
Attach the 81b. Two outer stoppers 84a and 84b for each loading arm and an inner stopper 85 including stop pins 85a and 85b and a stop plate 85c are arranged on the support plate 82a so as to be positionally adjustable. In addition, the rollers 871a and 871b attached to the rear ends of the loading arms 81a and 81b, and the rotary cam 872 that is pivotally supported by the support plate 82b and that engages with each roller, and the auxiliary plate 873 are fixed and are connected to the rotary cam. Motor 874
A cam mechanism 87 is provided.

The rotary cam 872 shown in FIG. 4 is provided with two eccentric arcs C ₁ and C by providing gaps G ₁ and G ₂ on the outer circumference of the circle.
₂ , and a spring 872a is provided at the position shown in the figure, and the rollers 871a and 872 are inserted in contact with the eccentric arcs. (A) shows the unloading state, each roller is at the position of each gap, and when the rotary cam rotates in the direction of the arrow, the rollers approach each other inward along the eccentric arc as shown in (b). As a result, both loading arms move inward in parallel, and at a certain angular position, the springs stably stop and loading is performed.

In the above cam mechanism, it is necessary to have means for smoothly rotating the rotary cam 872 between the angular positions of unloading and loading, and accurately stopping at each position. However, when the heights of the stoppers 84 and 853 of the loading mechanism 8 are adjusted according to the thickness of the disk 1, the positions of the rollers 871a and 871b are changed, and the contact force with respect to the eccentric arcs C ₁ and C ₂ is reduced. The rotary cam 872 cannot rotate smoothly due to balance. A control unit 9 is provided to deal with these.

FIG. 5 shows the configuration of each part of the controller 9. Figure 5
(a) shows a means for stopping the rotary cam 872 at the angular position of unloading, the detection bar 911 provided at the position of the gap G ₁ of the rotary cam, and the projector provided vertically.
The angle detector 91 is constituted by the light receiving device 912b and the light receiving device 912b. When the detection bar is at the position shown in the figure, that is, the angular position of unloading is detected.
Stop rotating.

FIG. 5 (b) shows the above rollers 871a and 871b.
The means for absorbing the change in the position of the support plate 82a is fixed to the member 6 and the support plate 82b is elastically connected to the support plate 82b by the buffer spring 92. The spring gives flexibility to the rotary cam 872, absorbs a slight positional change of each roller, and can rotate smoothly. (c) shows the control mechanism 93 for stopping the rotary cam at the loading angular position, fixing the auxiliary plate 873 to the housing of the motor 874, and placing the spring 931 and the switch 932 at the position shown between the auxiliary plate and the member 6. And are provided. Rotation of the rotary cam causes each loading arm 81a, 81b to stop inside
When it comes into contact with 85 and stops, the rotating shaft of the motor also stops, but because the motor still has a rotating force, the reaction causes the auxiliary plate to resist the pulling force of the spring 931 and rotate in the opposite direction shown by the dotted line. The switch 932 is closed to stop the motor rotation.

[0017]

As described above, in the head loading device according to the present invention, various spacers are provided by interposing a spacer having a thickness corresponding to the thickness of the disc on the upper surface of the moving block of the head arm mounting portion. For each disk, each head arm is set to the correct height with respect to each surface, each head is set to the same position of the track of the disk by the micrometer, and the two loading arms of the loading mechanism are By adjusting the outer and inner stoppers, the height is set to correspond to the thickness of the disk to be inspected, and the rotary cam of the cam mechanism rotates smoothly under the control of the control unit, and it is accurate at each angular position. After that, each head is unloaded or loaded well, and spacer replacement Compared to the replacement method, it can be done in a shorter time, and since the mounting part and the loading mechanism can be easily attached to and detached from the carriage mechanism, maintenance and inspection of them can be facilitated, and the operation efficiency of the inspection device can be improved. There is a great contribution to the magnetic disk inspection device.

[Brief description of drawings]

FIG. 1 is an external perspective view of a part of a head loading device 10 according to an embodiment of the present invention.

FIG. 2 is a sectional view of a head arm mounting portion 7 of FIG.

3 is a sectional view of the loading mechanism 8 of FIG.

4 is an axial sectional view of the rotary cam 872 of FIG.

5 shows respective parts of a control part 9 with respect to FIG. 1, (a) shows an angle detector 91, (b) shows a buffer spring 92, and (c) shows a control mechanism 93, respectively.

FIG. 6 is an explanatory diagram of an inspection method by a magnetic disk inspection device.

FIG. 7 is an external perspective view of a conventional head loading device 5.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Magnetic disk, 2 ... Spindle, 3 ... Head / arm assembly, 3a ... Upper assembly, 3b ... Lower assembly, 31a ... Upper head, 31b ... Lower head,
32 ... Head arm, 33 ... Mounting base, 4 ... Carriage mechanism, 41 ... Slide plate, 42 ... Moving part, 5 ... Conventional head arm loading device, 523a ... Upper loading bar,
523b ... Lower loading bar, 6 ... Mounting member, 7 ...
Head arm mounting portion of the present invention, 71a ... Upper support arm, 71b ... Lower support arm, 72 ... Moving block, 73 ... Upper spacer, 74 ... Lower spacer, 75 ... Bolt, 76 ... Bracket, 8 ... Loading mechanism, 81a ... Upper loading arm, 81b ... Lower loading arm,
82 ... Bracket, 82a, 82b ... Support plate, 83a, 83b ... Guide rail, 84a, 84b ... Outer stopper, 85 ... Inner stopper,
85a, 85b ... Strike stopper, 85c ... Stop plate, 86 ... Spring, 87 ... Cam mechanism, 871a, 871b ... Roller, 872 ...
Rotary cam, 872a ... Spring, 873 ... Auxiliary plate, 87
4 ... Motor, 9 ... Control part, 91 ... Angle detector, 911 ... Detection bar, 912a ... Emitter, 912b ... Light receiver, 92 ... Buffer spring, 93
… Control mechanism, 931… Spring, 932… Switch, 10
... head loading device, G _1, G ₂ ... gap, C _1, C ₂ ... eccentric arc of the invention.

Claims (2)

[Claims] 1. A magnetic disk inspecting apparatus comprising a carriage mechanism for moving a magnetic head with respect to a magnetic disk to be inspected, which is mounted on a spindle and rotated, and is mounted on a moving part of the carriage mechanism to have a thickness. Configured for various magnetic disks of different
The head arm mounting portion includes a loading mechanism, and the head arm mounting portion includes a mounting member that is removably mounted on the moving portion, a moving block fixed to the member, and thicknesses of the various magnetic disks. By using spacers having a corresponding thickness in exchange, two supporting arms screwed respectively on the upper and lower surfaces of the moving block with the spacers interposed therebetween, and the supporting arms screwed on the tips of the supporting arms, The head arm assembly for the upper surface and the lower surface of the disk, and a micrometer that engages with the rear end of each support arm and adjusts the position of the magnetic head of each assembly. Is a bracket fixed to the member, two guide rails vertically fixed to the bracket, and the bracket. Two outer stoppers and two inner stoppers, each of which is provided on the racket and whose height position can be adjusted to correspond to various magnetic disks, are biased inwardly by springs, and each of the guides Two loading arms that move in parallel outwardly or inwardly between the stoppers along a rail, and a loading arm that is screwed to the tip of each loading arm and contacts the head arm of each assembly. A head loading device comprising a bar and a cam mechanism for unloading or loading the magnetic heads by moving the loading arms in parallel. 2. The cam mechanism comprises a roller provided at a rear end of each loading arm, a rotary cam which engages with each roller and moves the loading arm in parallel, and a rotation of the rotary cam. By adjusting the height position of the driving motor and the stoppers, the rotary cam is smoothly rotated by absorbing the position change generated in the rollers, and the rotation of the motor is changed to the unloading and loading angular positions. 2. The head loading device according to claim 1, wherein the head loading device is configured by a control unit that accurately stops at.