JP2004087060A - Axial aligner of floating type disk inserter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an axial aligner of a floating type disk inserter by which the axial alignment of a recessed part of a disk clamp and a shaft is exactly performed. <P>SOLUTION: The device inserts a disk 2 onto the shaft 6 by relatively moving the disk clamp 21 of clamping the disk 1 in the state of not projecting the inner peripheral edge of a shaft hole 2a of the disk 2 into an internal diameter of the recessed part 44 for axial alignment of an end surface and the shaft 6 disposed opposite to the recessed part 44 and inserted into the shaft hole 2a of the disk 2 in a floating state by jetting pressurized fluid to the end surface side from the recessed part 44 thereby performing axial alignment of the recessed part 44 and the shaft 6. The inner peripheral surface end of the recessed part 44 is provided with a step 43 for acting the inner peripheral surface of the recessed part 44 and the outer peripheral surface of the shaft 6 in directions where these surfaces are parted from each other. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a shaft alignment device in a floating disk insertion device for inserting a disk such as a magnetic disk used in a hard disk drive into a shaft.
[0002]
[Prior Art and Problems to be Solved by the Invention]
Conventionally, a hard disk has a magnetic disk on a disk which is rotatably supported and accommodated therein. By rotating the disk and scanning the rotating disk with a head, writing data to the magnetic disk, It is structured to read data from a magnetic disk. For this reason, in the manufacturing process of the hard disk, there is always a process of inserting the magnetic disk into the fulcrum shaft.
[0003]
On the other hand, in a hard disk, the distance between the head and the disk when reading and writing data is extremely small (approximately 0.1 micron or less). If dust or the like is generated in the hard disk case, the hard disk may cause a reading or writing error of the hard disk. It may occur, and the user hates dust in the case.
[0004]
Therefore, it is necessary to insert the magnetic disk into the fulcrum shaft without causing at least one of the holes and the fulcrum shaft to come into contact with each other so that dust is generated. In order to realize this, the present applicant has already filed a patent application for a device for inserting a plate-like member such as a magnetic disk into a shaft disclosed in JP-A-2001-157932.
[0005]
The above-mentioned patent application (apparatus for inserting a plate-like member into a shaft) is simply described in that the position of a recess formed in a holder for holding a disk and the hole of the disk are adjusted by primary adjusting means, By adjusting the position (axial center) between the concave portion of the holder and the shaft by the adjusting means, the disk is inserted into the shaft without bringing the inner peripheral surface of the hole of the disk into contact with the shaft.
[0006]
At this time, the secondary adjusting means allows the shaft to be movably supported in a floating state and opposed to the concave portion of the holder, and then ejects air outward from the concave portion, and the air is used to move the shaft into the hole. At the time of fitting insertion, the shaft is guided such that the gap between the outer peripheral surface of the shaft and the inner peripheral surface of the concave portion is automatically uniform.
[0007]
However, the guide force by the air is small, and an environment is required so that the guide can be smoothly performed, and the environment of the apparatus needs to be maintained. For this reason, there has been a demand for a centering device of a floating disk insertion device which has a large position adjusting force between a shaft and a hole as a secondary adjusting means and guides the shaft stably by the position adjusting force.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the centering device of the floating type disk inserting device according to the present invention is configured such that, first, the disk 2 having the shaft hole 2a formed with the recess 44 for centering on the end face is formed. In a state where the inner peripheral edge of the shaft hole 2a does not protrude into the inner diameter of the recess 44, the disc gripping portion 21 gripped on the end face side is inserted into the shaft hole 2a of the disc 2 facing the recess 44. The disk 2 and the shaft 6 are relatively moved in a floating state by ejecting a pressurized fluid to the end face side from the concave portion 44 to align the axis of the concave portion 44 with the shaft 6. In the floating type disk insertion device for inserting the disk 2 into the shaft 6, the stepped portion 43 for causing the pressurized fluid to act in a direction of separating the inner peripheral surface of the concave portion 44 and the outer peripheral surface of the shaft 6 from each other is formed by the concave portion 44. of It is characterized in that provided on the circumferential surface end.
[0009]
Secondly, the present invention is characterized in that the step portion 43 is provided continuously on the entire inner peripheral surface of the concave portion 44.
[0010]
Third, the recess 44 has a circular cross section.
[0011]
Fourth, the disk 2 is a magnetic disk in a hard disk drive.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
FIGS. 1 to 3 are schematic diagrams showing, in chronological order, steps of inserting a magnetic disk 2 into a fulcrum shaft 6 by a floating disk insertion device using a disk support unit 1 for supporting a disk employing the present invention. FIG. 1 illustrates a process of gripping one magnetic disk 2 in a stacked state and placing the magnetic disk 2 on a primary adjustment table 4 for adjusting a position (grip position) of the magnetic disk 2 gripped by the disk support unit 1. FIG. 2 shows a state of adjusting the position of the magnetic disk 2 on the primary adjustment table 4, and FIG. 3 shows a step of inserting the magnetic disk 2 into a fulcrum shaft 6 in a hard disk case 7.
[0013]
The disk support unit 1 is moved by a robot (not shown) between a disk mounting table 3 on which the magnetic disks 2 are stacked, the primary adjustment table 4, and an insertion table 8 in which a hard disk case 7 is arranged. The primary adjustment table 4 and the insertion table 8 can be moved up and down.
[0014]
The disk support unit 1 moves the magnetic disk stacking position (the magnetic disk 2 to be gripped) of the disk mounting table 3 with respect to the primary adjustment unit 9 of the primary adjustment table 4 depending on the positioning accuracy of the robot. , With respect to the mounting position of the hard disk case 7 on the insertion table 8, respectively, with a predetermined positioning accuracy.
[0015]
As a result, the magnetic disks 2 on the disk mounting table 3 are stacked at a predetermined magnetic disk stacking position, so that the disk support unit 1 grips substantially the same position of each magnetic disk 2. In addition, an error in a micron unit of the gripping position occurs due to the lamination state of the magnetic disks 2 and the repeatability of positioning by the robot.
[0016]
Also, the hard disk case 7 on the insertion table 8 is fixedly mounted at a predetermined mounting position. The mounting accuracy, the positional accuracy of the fulcrum shaft 6 in the hard disk case 7, the repeatability of positioning by the robot, and the like As a result, the positional accuracy between the hard disk case 7 (fulcrum shaft 6) and the disk support unit 1 has an error in units of microns.
[0017]
In other words, the positioning accuracy of the robot depends on the gripping position of the magnetic disk 2, the positional deviation error between the fulcrum shaft 6 and the disk support unit 1, and the positional deviation error between the disk support unit 1 and the primary adjustment unit 9. Accuracy that is different only in units is required. However, a conventionally known assembling robot usually satisfies the above-mentioned accuracy, and thus the description of the robot is omitted.
[0018]
When the magnetic disk 2 is inserted into the fulcrum shaft 6 by the disk support unit 1, the disk support unit 1 first removes the magnetic disk 2 from the disk mounting table 3 as shown in FIG. As shown in FIG. 1B, the magnetic disk 2 is moved onto the primary adjustment table 4 while holding the magnetic disk 2. Next, the disk support unit 1 places the magnetic disk 2 on the primary adjustment table 4 as shown in FIG. 1C, and thereafter, as shown in FIG. Retreat above 4
[0019]
On the other hand, as shown in FIG. 2, the primary adjustment table 4 is provided with an adjustment hole 11 having a diameter slightly smaller than the diameter of the shaft hole 2a for inserting the magnetic disk 2 into the fulcrum shaft 6. The adjustment claw holder 12 is accommodated in the adjustment hole 11. The adjustment hole 11 and the adjustment claw holder 12 constitute the above-described primary adjustment section 9.
[0020]
At this time, a plurality of adjusting claws 13 are accommodated in the adjusting claw holder 12, and each adjusting claw 13 is moved by sliding an adjusting shaft 14 slidably mounted in the adjusting claw holder 12 in the axial direction. The adjusting claw holder 12 can be protruded from the outer periphery. When the projection output by the adjustment shaft 14 is released, the adjustment claw 13 is returned and stored in the adjustment claw holder 12 by a spring or the like (not shown).
[0021]
When the magnetic disk 2 is placed on the primary adjustment table 4 by the disk support unit 1, the center of the shaft hole 2a of the magnetic disk 2 and the center of the adjustment hole 11 are eccentric with an error of a micron unit as described above. Due to this error, although the axial hole 2a of the magnetic disk 2 is larger than the diameter of the adjustment hole 11, the inner peripheral edge of the axial hole 2a of the magnetic disk 2 as shown in FIG. May be located within the inner diameter of the adjustment hole 11.
[0022]
Therefore, when the magnetic disk 2 is placed on the primary adjustment table 4, the adjustment claw 13 is made to protrude from the adjustment claw holder 12, so that the end of the adjustment claw 13 contacts the peripheral surface of the adjustment hole 11. The adjusting claw 13 abuts on the peripheral edge of the shaft hole 2a of the magnetic disk 2 located in the adjusting hole 11, and the adjusting claw 13 abutting on the peripheral edge of the shaft hole 2a moves the magnetic disk 2 in the shear direction. It comes into contact with the peripheral surface of the adjustment hole 11 while sliding.
[0023]
As a result, as shown in FIG. 2B, the position of the magnetic disk 2 with respect to the primary adjustment table 4 is adjusted so that the peripheral edge of the shaft hole 2a of the magnetic disk 2 is not located in the adjustment hole 11. As shown in FIG. 3A, the disk support unit 1 is lowered to grip the magnetic disk 2 on the primary adjustment table 4.
[0024]
At this time, since the positions of the disk support unit 1 and the primary adjustment table 4 are mechanically positioned, the gripping position of the magnetic disk 2 gripped by the disk support unit 1 is adjusted to a position to be described later. Adjustment (primary adjustment) of the disk 2 to the disk support unit 1 is performed.
[0025]
Then, the disk support unit holding the magnetic disk 2 in the state where the primary adjustment has been performed is moved onto the insertion table 8 as shown in FIG. 3B, and the disk support unit 1 is moved to the disk support unit 1 as described later. By lowering while performing position adjustment (secondary adjustment) with the fulcrum shaft 6, contact (contact) between the magnetic disk 2 and the fulcrum shaft 6 is prevented, and the magnetic disk 2 is inserted into the fulcrum shaft 6. be able to.
[0026]
Next, the detailed structure of the disk support unit 1 will be described in detail. As shown in FIGS. 4 and 5, the disk support unit 1 includes a support arm 15 supported on the robot side, a floating support block 16 integrally attached to the support arm 15, and a floating support block 16. And a holding body 17 supported in a hanging manner by a configuration described later.
[0027]
The gripper 17 has a shaft portion 19 having a circular cross section, a conical-piece-shaped support portion 20 provided above the shaft portion 19 and having a tapered surface which receives a floating action, and a magnetic disk 2 which can be attached and detached. It has a structure provided with a gripping portion 21 for gripping. The shaft portion 19 is loosely fitted in the shaft hole 16a of the floating support block 16 and the shaft hole 15a of the support arm 15 so as to be capable of swinging up and down and in all circumferential directions with a play gap H.
[0028]
On the other hand, the floating support block 16 has a structure in which the float case 22 is closed by a case lid 23 so as to be openable and closable. The float case 22 includes a support wall 25 having a downwardly funnel-shaped (conical) tapered surface inside. I have. A shaft hole 16a is formed in the center of the support wall 25 to form a float chamber 26. The shaft portion 19 is inserted into the shaft hole 16a to form a tapered surface between the support portion 20 and the support wall 25. The supporting portion 20 is supported by being brought into contact with the supporting portion 20.
[0029]
An air supply chamber 29 connected to an air compressor (not shown) through an air supply port 27 is formed at the lower part of the entire circumference of the support wall 25. Passages (vents) 31 are formed at predetermined intervals, and compressed air, which is a pressurized fluid supplied to the air supply chamber 29, is supplied to the float chamber 26 through the vents 31. It is possible to squirt.
[0030]
As a result, when compressed air is supplied into the air supply chamber 29 through the air supply port 27, air is jetted into the float chamber 26 from each of the ventilation holes 31 formed in the support wall 25, and the tapered surface of the support portion 20 is formed. Under the pressure of the jet air, as shown in FIG. 5, the supporting portion 20 is separated from the tapered surface of the supporting wall 25 and floated, and the shaft portion 19 is turned upward in the shaft hole 30. The support member 20 moves and is supported in a state where the support portion 20 floats from the support wall 25 in the float chamber 26, that is, the holding body 17 is supported by the float case 22 in a floating state (floating state).
[0031]
That is, as shown in FIG. 4, in a state in which air is not supplied to the air supply chamber 29 (a state in which air supply is stopped), the gripping body 17 has its own weight of the taper between the support portion 20 and the support wall 25. When the compressed air is supplied into the air supply chamber 29 as shown in FIG. The body 17 is supported in a floating state as described above.
[0032]
The holding state of the gripping body 17 with respect to the floating support block 16 is switched between the positioning support state by the abutment of the tapered surfaces and the floating support state, and particularly from the floating support state to the positioning support state by the on / off of the compressed air. When the switching is performed, the floating case 22 is restored to a fixed position and positioned by the positioning by the contact of the tapered surface.
[0033]
A shaft hole 32 is formed in the case lid 23 so as to face the center line of the support wall 25, and a positioning shaft 33 is slidably supported in the shaft hole 32 with the positioning shaft 33 protruding downward. ing. The positioning shaft 33 is urged downward by a spring 35 provided in the shaft hole 32.
[0034]
Further, a concave positioning portion 36 is formed at the center of the head of the support portion 20 (coincident with the axis) so as to be able to contact the sharply formed tip of the positioning shaft 33. In the floating state, the distal end of the positioning shaft 33 and the positioning portion 36 of the support portion 20 come into contact with each other, and the spring 35 applies a pressing urging force in the anti-floating direction side. The gripping body 17 is positioned and supported by the balance between the applied force and the air pressure.
[0035]
At this time, since the support portion 20 and the support wall 25 have tapered surfaces that are joined to each other, the floating pressure of the air uniformly acts on the entire circumference of the tapered surface of the support portion 20, and the holding member 17 is in the floating state. Also, the support accuracy of the axial center position is high, and the swing on the grip portion 21 side is suppressed.
[0036]
Further, the support portion 20 which is in a floating state in the float chamber 26 can be in contact with the positioning shaft 33 and the positioning portion 36 even when there is a fluctuation in the air pressure ejected from each of the ventilation holes 31 or a turbulent air flow. Due to the pressing, the positioning reference point of the support portion 20 (the contact point between the positioning shaft 33 and the positioning portion 36) does not shift, and the support portion 20 is floatingly supported while being positioned at the reference point.
[0037]
For this reason, the floating body 17 in the floating state is set in a range allowed by a floating gap formed between the tapered surface of the support portion 20 and the support wall 25 with the contact position between the positioning shaft 33 and the positioning portion 36 as a fulcrum. , Can freely swing in all circumferential directions, and the secondary adjustment described later can be smoothly performed.
[0038]
Next, the configuration of the grip 21 will be described. As shown in FIGS. 6 and 7, the grip portion 21 has a cylindrical shape having a hole-shaped concave portion 44 on the lower end surface, and is attached and fixed to the lower end of the shaft portion 19 in an airtight state. At this time, an input port 40 for compressed air and an exhaust port 41 for air are formed in the shaft portion 19, and the concave portion 44 is communicated with the input port 40, so that air can be ejected from the concave portion 44. .
[0039]
At this time, a step 43 is formed at the lower end of the inner peripheral surface 42 of the recess 44 so as to project inside the recess 44, and the diameter of the inner circumference 45 of the step 43 is larger than the outer diameter of the fulcrum shaft 6. In addition, the diameter is set smaller than the diameter of the adjustment hole 11 described above. The axial center of the concave portion 44 and the axial center of the adjusting hole 11 are set such that the inner peripheral edge of the adjusting hole 11 is within the inner peripheral inner diameter of the step portion 43 when the disk support unit 1 moves up and down due to the positioning accuracy of the robot. Positioning is set in advance so as not to protrude.
[0040]
As a result, as shown in FIG. 3A, the primary adjustment of the magnetic disk 2 allows the magnetic disk 2 so that the inner peripheral edge of the shaft hole 2a is not located within the inner diameter of the inner periphery 45 of the step portion 43. The holding position of the magnetic disk 2 is adjusted. In the positioning and supporting state of the gripping body 17, the gripping body 17 is positioned at a fixed position of the floating case 22, so that the positioning accuracy by the robot can be easily obtained, and exceeds the adjustable range of the primary adjustment. Such a displacement of the magnetic disk 2 does not occur, and the primary adjustment is reliably performed.
[0041]
A plurality of suction ports 46 communicating with the output port 41 are provided at a lower end surface of the grip portion 21, and the magnetic disk 2 is moved by the suction force of the air sucked through the suction ports 46. Is held by suction at the lower end surface of the. The grip 21 configured as described above is formed of a hard rubber material, a plastic material, or the like in order to prevent the magnetic disk 2 from being damaged or damaged.
[0042]
Next, the position adjustment (secondary adjustment) between the grip 21 and the fulcrum shaft 6 will be described with reference to FIGS. Note that the upper end edge of the fulcrum shaft 6 is chamfered, and a fitting guide surface 49 is formed.
[0043]
As shown in FIG. 3 (a), the gripper 17 holding the magnetic disk 2 by suction by the gripper 21 is moved down the disk support unit 1 toward the fulcrum shaft 6 as shown in FIG. 3 (b). At this time, compressed air is supplied to the air supply chamber 29 of the floating support block 16 to support the gripping body 17 in a floating state, and compressed air is supplied from the input port 40 to the concave portion 44 so that the grip portion 21 (concave portion 44) is compressed. ) To blow out compressed air.
[0044]
At this time, the air ejected from the concave portion 44 is to be released at a uniform pressure from the gap between the inner peripheral surface 45 of the step portion 43 and the outer peripheral surface of the fulcrum shaft 6. The gap with the outer peripheral surface of the nozzle 6 is made uniform over the entire circumference. For this reason, when the axis of the grip 21 and the axis of the fulcrum shaft 6 are eccentric, the gripper 17 swings in the entire circumferential direction with the above-mentioned reference point as a fulcrum, and The axes are aligned, and the position of the grip 21 and the fulcrum shaft 6 is adjusted, that is, the secondary adjustment is performed.
[0045]
When the magnetic disk 2 is inserted into the fulcrum shaft 6 while performing the above-described secondary adjustment, the center of the concave portion 44 and the fulcrum shaft 6 are aligned as described above. The inner peripheral edge of the shaft hole 2a of the magnetic disk 2 does not protrude inside, and when there is no external factor, the fulcrum shaft 6 does not contact the shaft hole 2a of the magnetic disk 2 without contact. 2 can be inserted into the fulcrum shaft 6.
[0046]
However, since the centering of the axis by the above-mentioned jet air is performed by the inner peripheral surface of the concave portion 44 and the outer peripheral surface of the fulcrum shaft 6 facing each other, the moment when the fulcrum shaft 6 is inserted into the shaft hole 2a, The contact between the shaft hole 2a and the fulcrum shaft 6 may occur. However, immediately after insertion (immediately after contact), the inner peripheral surface of the concave portion 44 and the outer peripheral surface of the fulcrum shaft 6 instantaneously oppose each other, so that the axis of the concave portion 44 and the fulcrum shaft 6 are aligned, that is, immediately after the abutment. The contact is released.
[0047]
During the insertion operation, the shaft hole 2a may come into contact with the fulcrum shaft 6 due to an external factor such as shaking. However, even if the abutment occurs, the recess 44 and the fulcrum are immediately contacted as described above. When the magnetic disk 2 is inserted into the fulcrum shaft 6, the inner peripheral surface of the concave portion 44 and the outer peripheral surface of the fulcrum shaft 6 are brought into contact with each other. No contact is made, such as scraping off the peripheral surface.
[0048]
Thereafter, the magnetic disk 2 is inserted to a position where the bottom surface of the magnetic disk 2 abuts on the step portion of the fulcrum shaft 6, the suction from the output port 41 is stopped, and the suction of the magnetic disk 2 by the suction port 46 is released. The magnetic disk 2 is smoothly inserted into the fulcrum shaft 6 in a state where the magnetic disk 2 is prevented from coming into contact with shaving or the like.
[0049]
In addition, the air discharged from the concave portion 44 is blocked by the step portion 43 and is narrowed by the gap L between the inner peripheral surface 45 of the step portion 43 and the outer peripheral surface of the fulcrum shaft 6. Therefore, it is considered that the air forms a vortex as shown by an arrow A on the upper surface side of the step portion 43, and the inner peripheral surface of the concave portion 44 and the outer peripheral surface of the fulcrum shaft 6 Act in a direction to separate them from each other.
[0050]
By the action of the air provided by the step 43, the alignment of the recess 44 and the fulcrum shaft 6 with the air is more stably maintained than in the case where the step 43 is not provided. Stably prevent contact (contact) between the two at the time of insertion work. As a result, a shaft centering mechanism which is relatively strong against external factors is provided. The shaft centering mechanism is maintained while resisting external factors, and contact between the concave portion 44 and the shaft hole 2a is prevented.
[0051]
However, although the effect of maintaining the axial alignment of the concave portion 44 and the fulcrum shaft 6 with the above configuration is great, the effect of moving the fulcrum shaft 6 and the disk 2 (moving them so that the axial centers are aligned) is relatively large. Done with a small force.
[0052]
However, at the time of the secondary adjustment, the gripping body 17 is supported by the floating support block 16 in a floating state, and the gripping body 17 swings around the tip of the positioning shaft 33. Even a relatively weak force of about the axis centering force can be smoothly swung, and the accuracy of centering between the axis of the grip 21 and the axis of the fulcrum shaft 6 is improved.
[0053]
Therefore, unlike the related art, the hard disk does not require a complicated and large-sized support mechanism for holding the shaft of the hard disk in a floating state and moving the shaft in the outer peripheral direction when the disk is inserted into the shaft. The fulcrum shaft 6 on the 7 side can be fixed, and the entire configuration of the disk support unit 1 can be simplified and inexpensive.
[0054]
The gripper 17 swings around the reference point as described above. However, since each error is in micron units as described above, the swing amount is in micron units. Of the grip 21 is extremely long, so that the swing of the grip 21 is approximated to a parallel movement, and the inner peripheral surface of the grip 21 and the fulcrum. No partial bite contact with the shaft 6 occurs.
[0055]
As described above, when the magnetic disk 2 is inserted into the fulcrum shaft 6, the magnetic disk 2 comes into contact with the fulcrum shaft 6, and the fulcrum shaft 6 is scraped by the magnetic disk 2, resulting in dust. It is prevented from remaining in the case (hard disk unit), and data reading or data writing failure (error) of the hard disk (magnetic disk) due to the dust is prevented, and the failure rate of the hard disk is reduced.
[0056]
In such a position adjusting and inserting operation, the floating support block 16 is configured such that the grip portion 21 is fitted with the shaft portion 19 at the center of the support wall 25 having a funnel-shaped tapered surface, and the tapered surfaces are joined to each other. Since the support is supported, the axial position of the gripping portion 21 with respect to the floating case 22 at the time of positioning support is fixed, and the positioning accuracy of the gripping body 17 with respect to the floating case 22 is high. The transfer operation and the like can be performed with accurate accuracy, and there is little adverse effect on the positioning accuracy on the robot side.
[0057]
Also, at the time of floating support, compressed air supplied into the air supply chamber 29 is blown out from each of the ventilation holes 31 formed in the support wall 25, and the contact between the support portion 20 and the tapered surface of the support wall 25 is cut off by the air pressure. As a result, the floating pressure of the air uniformly acts on the entire circumference of the tapered surface of the support portion 20, so that the gripper 17 can maintain the positional accuracy of the axial center position with respect to the floating case 22 even in the floating support state. The subsequent adjustment can be performed smoothly and accurately at the shortest possible travel distance.
[0058]
At this time, immediately before switching the gripper 17 to the floating support state, the gripper 17 is supported by the floating case 22 in the positioning support state, and the positional deviation between the concave portion 44 and the axis of the fulcrum shaft 6 is always maintained in micron units. The secondary adjustment can be surely performed without any displacement that exceeds the range of the secondary adjustment.
[0059]
In the present embodiment, an example in which the primary adjusting means (primary adjusting unit 9) is provided on the positioning table 4 side has been described, but the primary adjusting unit 9 may be provided on the grip body 17 side. In addition, the holding portion 21 having the step portion 43 may be employed in a device for supporting the hard disk case 7 in a floating state, and the insertion table 8 may be structured to support the hard disk case 7 in a floating state. Both the holding body 17 and the hard disk case 7 may be movable or rockable when inserted into the fulcrum shaft 6.
[0060]
【The invention's effect】
According to the structure of the present invention configured as described above, when the disc is inserted into the shaft, the pressurized fluid (e.g., compressed air) is ejected from the concave portion, so that the pressurized fluid and the inner peripheral surface of the step portion are connected to the shaft. Attempt to release with equal pressure from the gap between the outer peripheral surface of the shaft and the outer peripheral surface of the shaft. Do. At this time, the air acts on the outer periphery of the shaft in a direction that separates the inner peripheral surface of the concave portion 44 and the outer peripheral surface of the shaft from each other.
[0061]
By the action of the pressurized fluid, the alignment between the concave portion 44 and the fulcrum shaft 6 is stably maintained, and the contact (contact) between the two during the disk insertion operation due to external factors or the like is stabilized. To prevent. This provides a shaft centering mechanism that is relatively strong against external factors such as the external environment, and maintains the shaft centering of both by enduring the above external factors, etc. Insertion work that prevents biting contact with the shaft can be performed smoothly.
[0062]
In particular, when the concave portion has a circular cross-sectional shape, the gap between the inner peripheral surface of the step portion and the outer peripheral surface of the shaft can be smoothly and easily adjusted. Can be stably maintained. If the disk is a magnetic disk of a hard disk, the magnetic disk can be inserted into the rotation fulcrum shaft while preventing contact with each other, and the magnetic disk and the shaft are inserted into the hard disk case when the magnetic disk is inserted. , And the like, can be prevented from being generated due to the contact.
[Brief description of the drawings]
1A is a schematic side view of a disk support unit holding a magnetic disk mounted on a disk mounting table, and FIG. 1B is a side view of the disk support unit moved to a position above a primary adjustment unit. (C) is a schematic side view of the disk support unit in a state where the magnetic disk has been lowered to the primary adjustment table so that the magnetic disk is placed on the primary adjustment table. FIG. 4 shows a schematic side view of the disk support unit as raised from the primary adjustment table after being placed on it.
FIG. 2A is a sectional side view showing a state of a magnetic disk placed on a primary adjustment table immediately before primary adjustment, and FIG. 2B is a view showing a state in which position adjustment on the primary adjustment table has been performed; It is a sectional side view showing the state of the magnetic disk after.
3A is a schematic side view of a disk support unit in a gripped state after primary adjustment of a magnetic disk, and FIG. 3B is a schematic view of the disk support unit in a state immediately before insertion of a magnetic disk into a fulcrum shaft. It is a side view schematic diagram.
FIG. 4 is a side sectional view showing a configuration of a floating support block and a grip portion.
FIG. 5 is a side sectional view showing a floating state of the gripping unit of FIG. 4;
FIG. 6 is a side sectional view showing a configuration of a gripping portion.
FIG. 7 is an enlarged sectional view showing a state of a vortex.
[Explanation of symbols]
2 Magnetic disk (disk)
2a Shaft hole
6 fulcrum axis (axis)
21 gripper
43 steps
44 recess
45 Inner surface of step

Claims (4)

A disc (2) having a shaft hole (2a) formed with a recess (44) for axial center alignment formed on an end surface of the disk (2) in a state where the inner peripheral edge of the shaft hole (2a) does not protrude into the inside diameter of the recess (44). A disk gripping portion (21) gripping the end face side; and a shaft (6) inserted into a shaft hole (2a) of the disk (2) opposite to the concave portion (44), By ejecting the pressurized fluid to the end face side from the concave portion (44), the disk (2) and the shaft (6) are relatively moved in a floating state, and the axis of the concave portion (44) and the shaft (6) is moved. In the floating type disk insertion device for centering and inserting the disk (2) into the shaft (6), the pressurized fluid separates the inner peripheral surface of the concave portion (44) and the outer peripheral surface of the shaft (6) from each other. The step (43) acting in the direction is formed at the inner peripheral end of the recess (44). Axis alignment device of floating type disk insertion device provided. 2. A shaft centering device for a floating disk insertion device according to claim 1, wherein the step portion is continuously provided on the entire inner peripheral surface of the concave portion. 3. The centering device according to claim 1, wherein the recess has a circular cross section. 4. The centering device for a floating disk insertion device according to claim 1, wherein the disk is a magnetic disk in a hard disk drive.

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