JP2007073184A - Screw fastening device of disk clamp ring of disk driving device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve workability and product quality reliability by automatically measuring screw fastening torque regarding a screw fastening device of a disk clamp ring of a disk driving device. <P>SOLUTION: The screw fastening device of a disk clamp ring of a disk driving device is provided with an automatic screw fastening torque checking mechanism for moving a screw fastening driver mechanism to a checking position by a robot mechanism and then automatically measuring the screw fastening torque. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a screw clamping device for a disk clamp ring of a disk drive device, and more particularly, to an automatic screw tightening torque check mechanism when a disk medium in an HDD (hard disk drive) device is screwed by a disk clamp ring. The present invention relates to a screw tightening device for a disc clamp ring of a disc drive having characteristics.

  In recent years, HDD (Hard Disk Drive) devices are frequently used as external storage devices for computers. Such HDD devices are thin film magnetic devices supported by a suspension by rotating a disk medium fixed to a spindle motor. The recording information recorded on the disk medium is read by the head, or the recording information is written on the disk medium.

  The spindle motor for fixing the disk medium has a disk support part for holding the disk medium and a central bubbling, and a number of screw holes for screwing the disk clamp ring are provided on the upper surface of the bubb. In addition, spacers are provided between the plurality of disk media to maintain the spacing and levelness between the disk media.

  In such a disk medium fixing process, in order to balance the rotation, each disk medium is shifted and shifted to each other, and screw tightening is performed in a state where the center of all the disk media coincides with the center of the spindle motor ( If necessary, see Patent Document 1).

  For screw tightening, automatic screw tightening is performed using a multi-axis electric driver or a single-axis electric driver (see Patent Document 2, Patent Document 3, and Patent Document 4, if necessary). In the shaft screw tightening driver mechanism, for example, screw tightening with a screw interval of φ22 is possible by using a small diameter arrangement mechanism with adjacent shaft intervals.

In addition, it is necessary to check the torque of the driver's bit before tightening the screw. Normally, after the operator attaches the driver head to the electric driver every day before the operation, the operator panel moves to the check position. The operator manually operated the screw tightening torque check mechanism to perform the check.
JP-A-10-149616 Japanese Patent Laid-Open No. 04-360732 Japanese Patent Laid-Open No. 06-099323 Japanese Patent Laid-Open No. 11-188655

  However, in the case of the conventional multi-axis screw tightening driver mechanism, since the screw torque check work is manually performed in the screw torque check process, it takes time for the positioning for the check, resulting in poor efficiency and reduced reliability. There's a problem.

  Therefore, an object of the present invention is to improve workability and improve product quality reliability by automatically measuring screw tightening torque.

Here, means for solving the problems in the present invention will be described with reference to FIG.
See Figure 1
In order to achieve the above object, in the present invention, the screw tightening torque is automatically applied to the screw tightening device of the disk clamp ring of the disk drive device after the screw tightening driver mechanism 1 is moved to the check position by the robot mechanism 4. An automatic screw tightening torque check mechanism 3 for measurement is provided.

  In this way, after the screw tightening driver mechanism 1 is moved to the check position by the robot mechanism 4 and the automatic screw tightening torque check mechanism 3 for automatically measuring the screw tightening torque is provided, the time for checking the set torque is shortened. In addition, the reliability of product quality can be improved.

  According to the present invention, by providing an automatic screw tightening torque check mechanism in a screw tightening device of a disk clamp ring of a disk drive device, it is possible to shorten a set torque check operation time and improve product quality reliability.

  The present invention provides an automatic screw tightening torque check mechanism that automatically measures screw tightening torque after a screw tightening driver mechanism is moved to a check position by a robot mechanism in a screw tightening device of a disk clamp ring of a disk drive device. It is.

Here, with reference to FIG. 2 to FIG. 14, the screw tightening device of the disk clamp ring of the HDD device of the present invention will be described, but it will be described as a screw tightening device for a 2.5 inch HDD device.
See FIG. 2 to FIG.
2 is a schematic plan view of a screw tightening device for a disc clamp ring, FIG. 3 is a schematic front view, and FIG. 4 is a schematic side view. In addition, illustration of members / structures that are essentially unrelated to the present invention is omitted.
The screw tightening device for the disk clamp ring of the HDD device of the present invention includes a screw tightening driver 11, a screw tightening driver rotating unit 12 for rotating the screw tightening driver 11 by a predetermined amount, and a robot mounting for moving the screw tightening driver 11 in predetermined XYZ directions. Unit 13, a pallet conveyor unit 14 for transporting an assembly formed by stacking disk media via a spacer to a hub of a spindle motor to a screw tightening position, a disk medium biasing unit 15 for biasing the disk medium before screw tightening, A recognition unit 16 for confirming the screw hole of the disk medium, a screw height detection unit 17 for detecting the height of the screw after screw tightening, and a bit cleaning unit 18 for periodically cleaning the bit of the screw tightening driver 11 are provided. Yes.

  In addition, this screw tightening device includes a screw tightening torque check unit 19 for confirming the set torque amount of the driver before work, and a screw tray stock unit 20 is provided behind the robot mounting unit 13. The screw tray stock unit 20 is stocked with a disk clamp ring in which a screw is inserted into a screw hole in an aligned state by pins.

  Further, as shown in FIG. 3, each of these units is covered with a cover unit 21 and supported by a housing unit 22, and each unit is placed inside the housing unit 22. A control unit 23 for driving control is stored.

Here, the screw tightening work procedure will be briefly described. First, before the work, a multi-axis screw tightening driver or a single-axis screw tightening driver is selected and set as the screw tightening driver 11 according to the type of the product to be screw tightened. At the same time, the torque amount of the driver is set manually, and then the screw tightening driver 11 is moved to the check position of the screw tightening torque check unit 19 by the robot mounting unit 13 according to a pre-programmed procedure. Measure the set torque.
If the measured torque amount is different from the preset setting value, the torque amount is manually reset.

  Next, after the assembly conveyed by the pallet conveyor unit 14 is set at the screw tightening position, the disk medium is aligned by the disk medium alignment unit 15, and the arrangement of the screw holes after the alignment is recognized. The screw tightening driver 11 is rotated by the screw tightening driver rotating unit 12 so that the bit of the screw tightening driver 11 matches the screw hole of the disk medium based on the result.

  After rotating a predetermined amount of rotation, the screw tightening driver 11 is moved to the screw tray stock unit 20 by the robot mounting unit 13 and the screw tightening driver 11 is lowered, thereby simultaneously vacuum-sucking the screw and the disk clamp ring, Next, the screw tightening driver 11 is moved to the screw tightening position by the robot mounting unit 13, and the screw is tightened by driving the electric driver in a state where the screw and the disk clamp ring are aligned with the disk medium.

  Next, the assembly after screw tightening is transported to the position of the screw height detection unit 17, and the screw height in the state where the screw tightening is completed is detected to determine whether the screw tightening process is good or not. If so, the same screw tightening process is sequentially and automatically performed.

Next, details of each unit and mechanism will be sequentially described.
See FIGS. 5A and 5B.
FIG. 5 (a) is a plan view of a single-axis disc clamp ring 31 of a type having one screw hole, and FIG. 5 (b) is a cross-sectional view thereof. Four reference holes 33 are provided on the same circumference as the screw hole 32, and an annular recess 34 is provided on the outer periphery of the reference hole 33.

See FIGS. 6 (a) and 6 (b).
FIG. 6A is a schematic cross-sectional view of the single-axis screw tightening driver 41 in a state where the single-axis disk clamp ring shown in FIG. 6 is adsorbed together with the screw, and FIG. 6B is a single-axis screw. FIG. 5 is a bottom view of the front end portion of the tightening driver 41, in which one electric driver 42 is provided, and an intermediate gear 45 and a driven gear 46 that sequentially mesh with a drive gear 44 provided on a rotating shaft 43 of the electric driver 42. A bit rotation shaft 47 is provided, and a bit 49 is provided at the tip of the bit rotation shaft 47 via a joint 48.

  Further, a housing 50 having a hole through which the bit 49 is inserted is provided at the tip of the bit 49, and a screw and a disc clamp ring suction component 51 are attached to the tip of the housing 50 in a replaceable manner. The housing 50 and the suction component 51 constitute a head.

  Note that an exhaust route connected to the exhaust duct 52 is provided in the housing 50 and the suction component 51, and this exhaust route is a standardized route so as to be compatible with various replaceable suction components 51.

See Fig. 7 (a)
FIG. 7A is an enlarged sectional view of the head. The housing 50 is provided with two detent pins 53, and the detent pin 54 is inserted into the reference hole 33 of the single-axis disc clamp ring 31. This prevents the disk medium 56 from rotating along with the rotation of the bit 49 in the screw tightening process.
Further, a spring 55 is provided at the rear end of the rotation prevention pin 54 to reduce the force in the insertion direction (thrust direction) of the disk medium, thereby preventing misalignment of the screw tightening.

Refer to FIG.
FIG. 7B is a bottom view of the head. The suction component 51 is attached to the housing 50 by a screw hole and a screw 57, and a screw suction port 58 that sucks the screw 35 in the center of the suction component 51. Four disc clamp ring suction ports 59 are provided, and the screw 35 and the single-axis disc clamp ring 31 are simultaneously removed by exhausting from the screw suction port 58 and the disc clamp ring suction port 59 through the exhaust duct 52. Can be adsorbed.

See FIGS. 8 (a) and (b).
FIG. 8A is a plan view of a multi-axis disc clamp ring 36 of a type having six screw holes, and FIG. 8B is a cross-sectional view thereof, as shown in the figure, on the same circumference. 6 screw holes 37 and two reference holes 38 are provided, and an annular recess 39 is provided on the outer periphery of the screw hole 37.

See FIGS. 9A and 9B.
FIG. 9A is a schematic cross-sectional view of the multi-axis screw tightening driver 61 in a state where the multi-axis disk clamp ring shown in FIG. 8 is adsorbed together with the screw, and FIG. 6 is a bottom view of the front end portion of the tightening driver 61, in which six electric drivers 62 are arranged in close contact with each other in an annular shape, and intermediate gears sequentially meshing with a driving gear 64 provided on a rotating shaft 63 of each electric driver 62. A small-diameter arrangement mechanism including a bit rotation shaft 67 attached via a 65 and a driven gear 66 is provided, and a bit 69 is provided via a joint 68 at the tip of the bit rotation shaft 67.

The small diameter arrangement mechanism provided in each electric driver 62 in this case is offset from each other along the axial direction, so that it becomes possible to arrange closer without receiving interference between the axes, Can correspond to φ15.
Further, each electric driver 62 is standardized with the electric driver 42 provided in the single-axis screw tightening driver 41 shown in FIG. 6, and therefore, similarly by the control unit 23 provided in the screw tightening device. Can be driven.

  Further, a housing 70 having a hole through which the bit 69 is inserted is provided at the tip of the bit 69, and a screw and a disc clamp ring suction component 71 are attached to the tip of the housing 70 in a replaceable manner. The housing 70 and the suction component 71 constitute a head.

Note that an exhaust route connected to the exhaust duct 72 is provided in the housing 70 and the suction component 71, and this exhaust route is a standardized route so as to be compatible with various replaceable suction components 71.
Further, the exhaust duct 72 is standardized so that it can be shared with the exhaust duct 52 of the single screw tightening driver 41, and thus can be similarly exhausted by the same exhaust system.

See FIG.
FIG. 10 is a schematic cross-sectional view of the screw tightening driver rotating unit 12. Based on the information from the recognition unit 16, the single-axis screw tightening driver 41 or the multi-axis screw tightening driver 61 is set in the screw tightening driver mounting portion 24. Thus, the screwdriver is rotated by a predetermined angle with the central axis of the screw tightening driver as the rotation axis so as to coincide with the position of the screw hole provided in the bubbling of the spindle motor.

  In this case, since the mounting dimensions of the single-axis screw tightening driver 41 or the multi-axis screw tightening driver 61 are the same, no matter which of the single-axis screw tightening driver 41 or the multi-axis screw tightening driver 61 is set, the same applies. Can rotate.

See FIG.
FIG. 11 is a plan view of the disk medium aligning unit 15 in which three disk medium aligning parts 81 _{a to} 81 _c are arranged at equal intervals of 120 °, and each disk medium aligning unit is arranged. parts 81 _a to 81 _c are respectively forward and backward biasing and member 83 _a to 83 _c fitted with a pawl member 82 _a to 82 _c pressed against the tip, the biasing member 83 _a to 83 _c with respect to the radial direction of the disk medium It constituted by a slow cylinder 84 _a -84 _c to move freely.
The reason why the biasing member 83 _c is bent is to avoid other components, and is functionally the same as the other shifting members 83 _a and 83 _b .

In this case, the moving speed of the low-speed cylinders 84 _{a to} 84 _c is 50 mm / second or less, for example, 10 mm / second, and the disk medium is not ejected because it is pressed slowly.

See FIGS. 12A to 12C.
12A to 12C are schematic cross-sectional views of the respective disk medium shifting parts 81 _{a to} 81 _c for shifting the disk medium of an H-type HDD device of a type in which three disk media are stacked. There, are different from each other shapes of the tip portion of the pressing pawl member 82 _a to 82 _c which is attached to the tip of each.

That is, as shown in FIG, pressing the pawl member 82 _a is intended to press the top of the disk medium in the radial direction, pressing the pawl member 82 _b is intended to press the disk medium in the middle in the radial direction, Furthermore, pressing the pawl member 82 _c are those presses the disk medium at the bottom in the radial direction.

In this case, since the biasing member 83 _a to 83 _c pressed from a position different from each other by 120 ° the disk medium in the radial direction of the disk medium, the resultant force of the pressing force of two biasing members, the pressing of the other biasing members Since it acts in a direction opposite to the force, a well-balanced shift is possible.

See FIGS. 13A to 13C.
FIGS. 13A to _13C are schematic cross-sectional views of disk medium shifting parts 81 _{a to} 81 _c for shifting the disk medium of an L-type HDD device of a type in which two disk media are stacked. There is exactly the same as the disk medium biasing component 81 _a to 81 _c shown in FIG. 12.

In this case, pressing the pawl member 82 _a and the pressing pawl member 82 _b is intended to press the disk medium above in a radial direction, pressing the pawl member 82 _c are those presses the disk medium under the radial direction.

That is, since the consideration of the shape of the pressing pawl member 82 _a to 82 _c, when applied to the two laminated type L-type HDD device, pressing nails were pushing the top of the disk medium in the H-type HDD device is projection of the distal end of the member 82 _a is a whiff, will be pressed against the disk medium on which corresponds to the disk medium in the middle by a recess of the tip.

Again, since the biasing member 83 _a to 83 _c pressed from a position different from each other by 120 ° the disk medium in the radial direction of the disk medium, the resultant force of the pressing force of two biasing members 83 _a, 83 _b, other since the action of the biased in the direction pressing force facing member 83 _c, allowing biasing well-balanced.

See FIG.
FIG. 14 is a schematic plan view of a crank stop provided in the disk medium offset unit 15, in which two clamp stops 85 _a and 85 _b are arranged so as to be 90 ° to each other, and each clamp stop 85 _a, 85 _b are each tip to the disc clamp ring pressing the pawl member 86 _a, 86 _b pressing member 87 fitted with _a, 87 _b and, the pressing member 87 _a, 87 a drive member for moving the _b up and down 88 _a, 88 _b .

See FIGS. 15 (a) and 15 (b).
FIGS. 15A and _15B are schematic cross-sectional views of clamp stops 85 _a and 85 _b for pressing the disk clamp ring of an H-type HDD device of a type in which three disk media are stacked. _{The a} and the clamp stop 85 _b have basically the same configuration, and the shapes of the disc clamp ring pressing claw members 86 _a and 86 _b are different depending on the pressing position.

In this case, the disk clamp ring pressing claws 86 _a and 86 _b are pressed so as to be fitted into annular recesses (34, 39) provided in the disk clamp ring. Only the disc clamp ring pressing claw members 86 _a and 86 _b need to be replaced depending on the type.

See FIGS. 16A and 16B
FIGS. 16A and 16B are schematic cross-sectional views of clamp stops 89 _a and 89 _b for pressing the disc clamp ring of an L-type HDD device in which two disc media are stacked. _{The a} and the clamp stop 89 _b have basically the same configuration, and the shapes of the disc clamp ring pressing claws 90 _a and 90 _b are different depending on the pressing position.
The plan view of the crank stop for the L-type HDD device is the same as FIG.

In this case, the disc clamp ring pressing the pawl member 90 _a, 90 a length of _b of the tip portion, which has longer than the length of the tip portion of the disk clamp ring pressing the pawl member 86 _a, 86 _b shown in FIG. 15, It is set to a length that cancels out the height corresponding to the fact that one disk medium is less.
Accordingly, it is possible to use the pressing members 87 _a and 87 _b and the driving members 88 _a and 88 _b that are the same as those of the three-layer type H-type HDD device.

  In this way, by considering the shape of the disk clamp ring pressing claw member, the HDD device with different number of stacked disk media can be obtained by simply replacing the disk clamp ring pressing claw member without changing the configuration of other members. In addition, it is possible to cope with screw tightening of various types of HDD apparatuses having different disk clamp ring shapes.

In a state of pressing the disc clamp ring screwing after completion using such a clamping stop 85 _a, 85 _b, when increasing the head of the screw tightening driver, even if the are engaged with the bit and the screw, HDD The assembly is not lifted up, and the meshing between the two is released and the assembly is separated smoothly.

  Therefore, since the tip of the bit is not worn or broken, the durability and exchangeability of the bit are improved, and the influence of screw wear by the bit is reduced, so that quality deterioration due to screw wear is improved. , Can improve the reliability of the product.

Based on the above, the screw tightening torque check mechanism according to the first embodiment of the present invention will be described next with reference to FIG.
Refer to FIG.
FIG. 17A is a schematic cross-sectional view of the screw tightening torque check unit 19 when checking the torque of the multi-axis screw tightening driver. The robot mechanism of the robot mounting unit 13 moves the multi-axis screw tightening driver to the check position. The multi-axis probe 92 that is automatically moved and attached to the tip of the torque checker 91 and the six bits 69 of the multi-axis screw tightening driver are sequentially coupled, and the set torque amount of each bit 69 is controlled via the control unit 23. Automatically detected by the torque checker 91.

Refer to FIG.
FIG. 17B is a schematic cross-sectional view of the screw tightening torque check unit 19 when checking the torque of the single shaft screw tightening driver. The robot mechanism of the robot mounting unit 13 moves the single shaft screw tightening driver to the check position. The single axis probe 93 attached to the tip of the torque checker 91 and the bit 49 of the single axis screw tightening driver are coupled to each other automatically, and the set torque amount of the bit 49 is automatically controlled by the torque checker 91 via the control unit 23. To detect.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the screw tightening mechanism of the disk clamp ring of the HDD device, and a disk-shaped member is stacked and screw tightened using the disk clamp ring. Applies to cases.

  In addition, the number of bits of the multi-axis screw tightening driver is not limited to six, but may be changed as appropriate according to the number of screw holes provided in the disc clamp ring. A four-axis screw tightening driver arranged by shifting by 90 ° may be used.

Here, referring to FIG. 1 again, the supplementary note of the present invention will be described.
See Figure 1
(Supplementary note 1) A screw of a disk clamp ring of a disk drive device, comprising an automatic screw tightening torque check mechanism for automatically measuring screw tightening torque after moving a screw tightening driver mechanism to a check position by a robot mechanism Fastening device.
(Supplementary note 2) Screw-screw driver mechanism that makes it possible to replace a multi-axis screw tightening driver mechanism and a single-shaft screw tightening driver mechanism, and to replace a suction member that simultaneously sucks a screw and a clamp ring, or the mutual angle Disk medium offset parts arranged so as to be 120 °, the disk medium offset parts have different step structures, and disc media at different stacking positions at the different levels. The disk clamping ring screw tightening device of the disk drive device according to appendix 1, further comprising at least one mechanism of a disk medium shifting mechanism having a push-out function.

It is explanatory drawing of the fundamental structure of this invention. It is a schematic plan view of the screw fastening apparatus of the Example of this invention. It is a schematic front view of the screw fastening apparatus of the Example of this invention. It is a schematic side view of the screw fastening apparatus of the Example of this invention. It is explanatory drawing of the disc clamp ring for single shafts used for the Example of this invention. It is a schematic sectional drawing of the single axis screw tightening driver used for the Example of this invention. It is explanatory drawing of the head of the front-end | tip part of the single axis screw fastening driver used for the Example of this invention. It is explanatory drawing of the multi-axis disc clamp ring used for the Example of this invention. It is a schematic sectional drawing of the multiaxial screw fastening driver used for the Example of this invention. It is a schematic block diagram of the screw fastening driver rotation unit used for the Example of this invention. FIG. 3 is a schematic plan view of a disk medium shifting unit used in an embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of a disk medium offset part for an H-type HDD device used in an example of the present invention. FIG. 2 is a schematic cross-sectional view of a disk medium offset part for an L-type HDD device used in an embodiment of the present invention. It is a schematic plan view of the crankstop used for the Example of this invention. It is a schematic sectional drawing of the crankstop for H type HDD devices used for the example of the present invention. It is a schematic sectional drawing of the crank stop for L type HDD apparatuses used for the Example of this invention. It is a schematic block diagram of the screw tightening torque check unit of Example 1 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Screw tightening driver mechanism 2 Disc medium alignment mechanism 3 Automatic screw tightening torque check mechanism 4 Robot mechanism 11 Screw tightening driver 12 Screw tightening driver rotation unit 13 Robot mounting unit 14 Pallet conveyor unit 15 Disc medium alignment unit 16 Recognition unit 17 Screw Height detection unit 18 Bit cleaning unit 19 Screw tightening torque check unit 20 Screw tray stock unit 21 Cover unit 22 Housing unit 23 Control unit 24 Driver mounting part 31 Single-axis disc clamp ring 32 Screw hole 33 Reference hole 34 Recess 35 Screw 36 Disc clamp ring for multi-axis 37 Screw hole 38 Reference hole 39 Recess 41 Single screw tightening driver 42 Electric driver 43 Rotating shaft 44 Drive gear 45 Intermediate gear 46 Driven gear 47 Bi Rotary shaft 48 joint 49 bit 50 housing 51 suction part 52 exhaust duct 53 spring 54 rotation detent pin 55 spring 56 disk medium 57 screw 58 screw suction port 59 disk clamp ring suction port 61 single screw tightening driver 62 electric driver 63 suction parts 72 exhaust duct 73 spring 81 _a to 81 _c disk medium rotating shaft 64 drive gear 65 intermediate gear 66 driven gear 67 bit rotation axis 68 joint 69 bits 70 housing 71 biasing part 82 _a to 82 _c pressing pawl member 83 _a ~ 83 _c Alignment members 84 _{a to} 84 _c Low speed cylinders 85 _a , 85 _b Crank stops 86 _a , 86 _b Disc clamp ring pressing claw members 87 _a , 87 _b Holding members 88 _a , 88 _b Drive members 89 _a , 89 _b cranks stop 90 _a, 90 _b disc clamp Li Grayed pressing pawl member 91 a torque checker 92 multiaxis probes 93 uniaxial probe

Claims (1)

A screw tightening device for a disk clamp ring of a disk drive device, comprising: an automatic screw tightening torque check mechanism for automatically measuring screw tightening torque after moving a screw tightening driver mechanism to a check position by a robot mechanism.

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