JPH0685270B2 - Automatic disk assembly method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Outline] A method for automatically assembling and mounting a disk used as an information recording medium on the outer periphery of a spindle hub or the like, and a simple device for preventing abrasion powder from being generated. With the aim of realizing a disc assembly method that can be automatically mounted at high speed with a vertical opening / closing shaft whose outer diameter can be changed by opening / closing the split shaft, the split shaft is closed to reduce the diameter. In this state, the disks to be assembled are transferred to and stacked on the outside of the opening / closing shaft, and when the required number of disks have been stacked, open the opening / closing shaft and insert them into the center hole of each disk. By abutting the circumference, centering of each disk is performed, then the opening / closing shaft is closed, and a large gap is provided between the disk and the inner circumference of each disk. By transferring it onto a shaft such as a hub and lowering it, It is configured to be inserted into the shaft portion at the same time.

[Industrial application field]

The magnetic disk device has a structure in which a disk (magnetic recording medium) having a magnetic film and a spacer ring are alternately stacked and fixed on the outer periphery of a spindle hub. The present invention relates to an automatic disc assembling method suitable for automatically assembling a disc used as an information recording medium or the like on the outer periphery of a shaft portion such as a spindle hub.

[Conventional technology]

FIG. 6 is a sectional view of a disk mounting portion of the magnetic disk device. A hub 3 is fixed to an inner end of a spindle 2 which is inserted and supported in a casing 1 of the magnetic disk device, and a drive motor M is connected to an outer end thereof.

On the outer periphery of the spindle hub 3, discs 5 and spacer rings 6 are alternately laminated on a flange 4 at the lower end, and a disc-shaped clamper 7 is screwed and fixed on the hub 3.

By driving the spindle 2 by the motor M, the disks 5 ... Are rotated at high speed, and the magnetic head 9 records / reproduces information.

By the way, in order to mount the disk 5 and the spacer ring 6 on the outer circumference of the hub 3, a minute gap of about 0.05 mm is provided between the inner circumference of the disk 5 and the spacer ring 6 and the outer circumference of the hub 3. Is provided.

This gap is necessary for assembling the disc and the spacer ring, and if it is too small, it becomes difficult to insert the disc and the spacer ring into the outer periphery of the hub 3. On the contrary, if it is too large, the misalignment between the disc and the spacer ring becomes large, and the dynamic balance is lost when the discs 5 rotate.

Therefore, this gap is made as small as possible. As a result, when the disc and the spacer ring are inserted into the outer periphery of the hub 3, as shown in FIG.
The inner peripheral edges 5i, 6i of the ring and the outer peripheral surface of the hub 3 rub against each other to generate abrasion powder 10. The abrasion powder 10 accumulates on the lower disk 5 and adversely affects the levitation of the magnetic head 9, and also causes a head crash or the like.

In particular, since a soft material such as aluminum is used as the material of the hub 3 for weight reduction, abrasion powder is easily generated.

By the way, whether the discs are mounted manually or automatically by a handling robot, the discs 5 and the spacer rings 6 are alternately inserted one by one and directly into the hub 3.

FIG. 8 is a sectional view showing a method for automatically assembling with a conventional handling robot. Reference numeral 11 is a disk storage space, and 12 is a spacer ring storage space, and a large number of discs 5 ... And spacer rings 6 ... are stocked in advance. A protective spacer is sandwiched between the circular plates 5.

Reference numeral 13 denotes a hand portion of the handling robot, which first sucks one disk 5 from the disk storage 11 and transfers it to the top of the hub 3 and then lowers it to insert the disk 5 into the hub 3. . Next, the hand unit 13 is used as a space for the spacer ring.
Move to 12, pick up one spacer ring 6,
By transferring to the top of the hub 3 and then descending, the hub 3
Insert the spacer ring 6 into.

By repeating the same operation, above the hub 3,
One disk 5 is transferred from the disk storage 11 and is inserted and stacked, whereby the disks 5 and the spacer rings 6 are alternately laminated.

When one disk 5 is taken out from the disk storage 11, the protective spacer is removed by a dedicated robot.

[Problems to be Solved by the Invention]

In this way, using the handling robot, the disks 5 and the spacer rings 6 are alternately taken out one by one from the disk storage space 11 and the spacer ring storage space 12, and the hub 3
The method of inserting into is adopted. And, as mentioned above,
Since the gap between each disk 5 or spacer ring 6 and the outer circumference of the hub is very small, the handling robot is very important for surely inserting each disk 5 or spacer ring 6 into the hub 3. High-precision equipment is required, and the equipment becomes large-scale and expensive.

In addition, since high precision operation is required, there is a limit to the speedup of the operation of the hand unit 13, and in particular, the disks 5 and the spacer rings 6 are transferred from the stocking place one by one to the hub. Since it is inserted in No. 3, the time required for assembling the disc is long and the efficiency is poor.

The technical problem of the present invention is to solve such a problem in automatically assembling a disc, to prevent the generation of abrasion powder, and to provide a disc assembling method capable of being automatically and rapidly mounted by a simple device. It is to be realized.

[Means for Solving the Problems]

FIG. 1 is a view showing the basic principle of an automatic disc assembling method according to the present invention in the order of operation, in which the left side is a plan view and the right side is a longitudinal sectional view.

(A) is a centering device, which has an opening / closing shaft on the base 26.
15 is supported to be openable and closable. That is, the split shaft portions 15a and 15b formed by splitting the shaft into a plurality of parts can be opened and closed, and the opening / closing operation is performed by a drive mechanism (not shown).

When the split shaft portions 15a and 15b are closed, the outer diameter of the opening / closing shaft 15 is reduced, and when it is opened, it is enlarged.

(A) and (b) show a state in which the opening / closing shaft 15 is closed and the outer diameter is reduced, and in this state, a circular body such as the disk 5 and the spacer ring 6 is transferred by a handling robot (not shown). And insert. At this time, since the opening / closing shaft 15 is closed and the gap G between the outer circumference of the opening / closing shaft 15 and the inner circumference of each disk 5 or the spacer ring 6 is large, the handling robot is Easy and fast,
It can be inserted into the opening / closing shaft 15.

In this way, the required number of disks 5 and spacer rings 6
Is roughly inserted, the split shaft portions 15a and 15b of the opening / closing shaft 15 are moved in the arrow direction to open as shown in FIG. Then, the inner circumferences of the discs 5 and the spacer ring 6 come into contact with the outer circumference of the opening / closing shaft 15, and the respective inner circumferences are aligned in the vertical direction with high accuracy, and the centering is completed.

Next, as shown in (d), the split shaft portions 15a and 15b are moved in the directions of the arrows to be closed, and each disk 5 and spacer ring 6 is closed.
The gap G between the inner circumference of the and the outer circumference of the opening / closing shaft 15 is increased.

Further, the support claws 16a and 16b for supporting the discs and the spacer ring 6 thus laminated are moved downward from the lowermost disc 5 as shown by an arrow a ₁ . Next, as shown by the arrow a _2, closed is moved in a direction, to enter the lower side of the disc 5 at the bottom. Then, when it is raised as shown by the arrow a ₃ , as shown in FIG.
The gently inclined surface 17 of 6b abuts the outer peripheral edge of the lowermost circular plate 5.

Then, when the support claws 16a and 16b are raised, the respective disks 5 and the spacer ring 6 are simultaneously raised. Then, as shown in (f), when it is transferred to just above the target hub 3 and the supporting claws 16a and 16b are lowered, the inside of the mounting holes 18 and 19 of the laminated discs 5 and spacer rings 6 respectively. To
The hubs 3 sequentially enter from the bottom and are assembled all at once.

Finally, the support claws 16a and 16b further descend, then open, and rise up in a state where the support claws 16a and 16b are separated from the lowermost circular plate 5 to return to the original standby state shown in (a).

Note that the support claws 16a and 16b do not come after the discs 5 and the spacer ring 6 are laminated, but the support claws 16a are first formed under the opening / closing shaft 15 as shown by the chain line in (a). , 16b are on standby, and after the disks 5 and spacer rings 6 are stacked on the frame 26 and centered, the support claws 16 are
It is also possible to raise a and 16b to lift the discs 5 and the spacer ring 6 all together and transfer them to the target hub 3.

The inclined surfaces of the support claws 16a and 16b may be set higher than the frame surface, and the stacking and centering may be performed on the support claws 16a and 16b.

[Action]

As described above, according to the present invention, the split shaft portions 15a and 15b of the opening / closing shaft 15 are closed and the outer diameter is small.
By opening a and 15b, the disks 5 and the spacer ring 6 arranged on the outer side of the disks are centered.

Therefore, the operation of transferring each disk 5 or spacer ring 6 one by one and placing it on the outside of the opening / closing shaft 15 is rough, and it is not necessary to use a highly accurate handling robot. Further, since rough positioning is sufficient, the operation of the handling robot can be speeded up.

Each disc 5 and spacer ring 6 are roughly laminated,
By simply opening the split shaft portions 15a and 15b of the opening / closing shaft 15, the centering of each disk 5 and the spacer ring 6 can be performed easily and with high accuracy. Therefore, when the support claws 16a and 16b are lifted and transferred onto the hub 3, the hub 3 can be easily and accurately inserted into the mounting holes of all the disks 5 and the spacer rings 6.

〔Example〕

Next, practical examples of how the automatic disk assembly method according to the present invention is embodied will be described. FIG. 2 is an assembly apparatus for carrying out the method of the present invention, and FIG. Reference numeral 20 denotes a turn tebourg, which is a circular disc magazine 21 in which a large number of circular discs are stacked ... Also,
It has spacer ring magazines 22a and 22b in which two types of spacer rings are stacked. 23 is a stacking handling robot that alternately stacks discs and spacer rings, and by the hand portion 13 at the arm tip thereof, from the disc magazine 21 and the spacer ring magazines 22a and 22b, the opening / closing shaft 15l of the present invention, The disk and spacer ring are transferred alternately to the 15r side and inserted as shown in FIG.

In the illustrated example, two sets of open / close shafts 15l and 15r are mounted on the reversing mechanism as shown in (b). In this reversing mechanism, a drive motor M is attached to the lower side of the device frame 24, and a rotary plate 26 is fixed to a shaft 25 of the motor M. Two sets of left and right open / close shafts 15r and 15l are mounted on the rotary plate 26.

Now, when the required number of disks 5 and spacer rings are stacked on the opening / closing shaft 15r on the right side, the rotating plate 26 is rotated 180 by the motor M.
It rotates once and replaces the empty open / close shaft 15l on the left side. Then, while the handling robot 23 alternately stacks the disk and the spacer ring on the empty open / close shaft 15l, the open / close shaft 15r is supported by the supporting claws at the arm tip of the handling robot 29 for simultaneous insertion. Side disk and spacer
Lift the rings all together and insert into the hub 3.

27 is a conveyor line, which is conveyed in the direction of the arrow in a state where the hub 3 is positioned and fixed to the jig 28 with high precision. Then, when it reaches the disc insertion position, it stops, and the discs and the spacer ring in the stacked state are inserted all at once by the supporting claws of the handling robot 29 for simultaneous insertion.

Although (c) is an example of the supporting claws having the supporting claws 16a, 16b, 16c at intervals of 120 degrees, the number of the supporting claws may be two or three or more.

Next, the automatic disc assembly operation of this apparatus will be described in the order of operation, with reference to FIG. First, when the reversing mechanism reverses and the open / close shaft 15r in the empty state comes to the stacking handling robot 23 side, the turntable 20 is turned by the hand unit 13 of the stacking handling robot 23.
Take out one disc from the one disc magazine 21 above,
Insert into the open / close shaft 15r. Then, by the hand unit 13 of the same handling robot, the spacer ring magazine
Take out one spacer ring from 22a and open / close shaft 15r
To insert. Then, in the same operation as above, the disk magazine 21
One disk is taken out from and is inserted into the opening / closing shaft 15r. In this way, the disc and the spacer ring are alternately inserted into the open / close shaft 15r in the closed state, and the predetermined number of discs and the spacer ring are inserted, so that the state shown in FIG. Then, the split shaft portions 15a and 15b are opened, the respective disks 5 and the spacer ring 6 are centered, and the open split shaft portions 15a and 15b are locked. In this locked state, the reversing mechanism reverses 180 degrees, and the other opening / closing shaft 15l moves to the stacking handling robot 23 side. Next, with the split shaft portions 15a and 15b of the opening / closing shaft 15r closed, and the disks 5 and the spacer ring 6 free, the support claws 16 of the handling robot 29 for simultaneous insertion are provided.
a, 16b, 16c enter the lower side of the lowermost disk 5 as shown in (d) and (e) of FIG.
Lift each disk 5 and spacer ring 6 together,
Transferred onto the hub 3 on the assembly line 27, as shown in FIG. 1 (f).
Insert all at once as shown in.

In this way, the handling robot 29 for simultaneous insertion takes out the respective disks 5 and the spacer ring 6 from the opening / closing shaft 15r at the same time, transfers them to the hub 3 at a time, and inserts them.
As described above, the handling robot 23 between the stacks alternates the disc and the spacer ring one by one, and the other opening / closing axis.
Rough insertion into 15l is performed. Therefore, the stacking on the opening / closing shaft and the operation of simultaneously taking out from the opening / closing shaft and inserting into the hub can be performed in parallel, continuous operation is possible, and the idle time is shortened.

When there are two types of spacer rings, two sets of spacer ring magazines are provided such as 22a and 22b, and one of the magazines is selectively taken out and laminated.

Further, in the disc magazine, a protective spacer is sandwiched between the discs. The spacer may be taken out and discarded by the stacking handling robot 23, but a separate handling robot may be provided separately from the handling robot 23 and only the spacer take-out and discard operation may be performed.

The split shaft portions 15a and 15b of the open / close shafts 15r and 15l may be two as shown in the illustrated example, but as shown in FIG. 3 (a), 15a, 15b,
3 of 15c or 15a, 15b, 15c, 15d as shown in (b)
With four, the centering becomes easier.

FIG. 4 is a sectional view showing an embodiment of the drive mechanism for the opening / closing shaft. The split shaft portions 15a, 15b have guide shafts 30a, 30b so as to linearly move in the opening / closing direction. Reference numeral 26 denotes a frame (rotating plate) that supports the opening / closing mechanism of the opening / closing shaft 15, and a bearing 31 that supports the guide shafts 30a and 30b so as to move linearly.
a and 31b are fixed.

The lower ends of the split shaft portions 15a and 15b are tapered slopes 32a and 32b, and a wedge-shaped plug 33 is provided between the slopes 32a and 32b.
Is provided. The wedge plug 33 is connected to a piston rod 35 of a fluid cylinder (actuator) 34.

Since the split shaft portions 15a and 15b are pulled in the direction to be closed by the tension spring 36, the piston rod of the fluid cylinder 34 is
When the 35 moves backward and down, the split shaft parts 15a, 1
5b is closed to have a small diameter, as in (a), (b), (d) and (e) of FIG.

When the piston rod 35 of the fluid cylinder 34 moves forward and moves upward, the wedge-shaped plug 33 moves to the tapered slopes 32a, 3a.
It is press-fitted between 2b and split shaft against the tension spring 36.
15a and 15b will be pushed open. As a result, as shown in FIG. 1 (c), the split shaft portions 15a and 15b are opened to be in a large diameter state.

This open / close drive mechanism is an example of two split shaft portions, but in the case of three or four split shaft portions as shown in FIG.
The tapered slopes 32a and 32b and the wedge-shaped plug 33 are conical in shape, which can be easily dealt with. Note that this opening / closing drive mechanism is an example, and another mechanism may be adopted.

FIG. 5 is a cross-sectional view showing an example in which the disk automatic assembly method of the present invention is carried out for assembling a magnetic recording medium in a magnetic disk device, in the order of the assembling operation. The disk 5 in this embodiment is a magnetic recording medium having a magnetic film on its surface, and the inner peripheral edge of the mounting hole 18 is chamfered as indicated by 18a and 18b. In addition, the inner peripheral edge of the mounting hole 19 of the spacer ring 6 that determines the distance between the adjacent disks is 19a, 1
Chamfered as shown at 9b. In addition, the disk 5 ...
The outer peripheral edge is also chamfered as shown by 18c and 18d.

In this way, the disk 5 assembled and mounted on the shaft portion 3 such as a hub is mounted.
If the inner peripheral edge of the mounting hole of the spacer ring 6 is chamfered diagonally, it is extremely easy to insert the shaft 3 at the same time as described below. The gap between the hub 3 and the outer circumference can be made small, and all discs 5
Also, the center position of the spacer ring 6 and the rotation center position can be accurately matched, and the rotation is stable and smooth.

(A) shows the supporting claws 16 of the handling robot for simultaneous insertion after all the disks 5 and spacer rings 6 in the stacked state are centered by the assembly method of FIG.
a and 16b are laminated disk 5 and spacer ring 6
Is transferred directly above the hub 3 ((f) in FIG. 1)
State).

As described above, since all the disks 5 and the spacer rings 6 are stacked in the centered state on the supporting claws 16a and 16b of the handling robot for simultaneous insertion, the supporting claws 16a and 16b of the handling robot are stacked. Is lowered, as shown in (b), each disk 5 ...
The hub 3 is sequentially inserted into the mounting holes 18 and 19 of the rings 6.

During this operation, the disk 5 ... and the spacer ring 6 ...
If the center of and the center of the hub 3 do not match exactly, the chamfered portion 18a of the mounting hole 18 of the lowermost disc 5 is
It slides down on the upper edge of the hub 3 and is centered on the hub 3 by its own weight.

Thereafter, the discs 5 ... And the spacer rings 6 ... Are smoothly fitted into the hub 3 one after another. As shown in (c), when all the disks 5 and the spacer rings 6 are mounted,
Only the support claws 16a and 16b are further lowered, opened in the direction of the arrow, and then raised to the original raised position, and then the stacked discs are received at the position of the opening / closing shaft.

If the upper outer peripheral edge 3a of the hub 3 is also chamfered to form an inclined surface, it becomes easier to mount the discs 5 ... And the spacer rings 6 ... by their own weight.

As described above, when the upper end of the hub 3 is inserted into the mounting holes 18 and 19 of the stacked disk 5 and the spacer ring 6, the lowermost disk 5 is located above the support claws 16a and 16b. Although slightly moved in the horizontal direction, the top surfaces of the tips of the support claws 16a and 16b are gently inclined surfaces 17. for that reason,
The lowermost disk 5 does not damage its lower surface 5a,
It smoothly moves horizontally, and the center of the mounting hole 18 coincides with the center of the hub 3 and is centered.

In the above-described embodiment, after all the disks 5 and the spacer rings 6 are centered in the stacked state by the opening / closing shaft, the handling robot for simultaneous insertion operates so as to go to the receiving. On the other hand, as shown by the chain line in (a) of FIG. 1, the supporting claws 16a and 16b of the handling robot for simultaneous insertion move to the position of the opening / closing shaft 15 and stand by, and Support nail 16
A laminating handling robot 23 shown in FIG.
Then, the discs and the spacer rings may be alternately laminated and centered by the opening / closing operation of the opening / closing shaft 15.

〔The invention's effect〕

As described above, according to the present invention, by inserting the discs 5 ... With the split shaft portions 15a, 15b closed and opening the split shaft portions 15a, 15b, after centering all at once, The method of inserting them all at once into the shaft portion 3 such as a hub is adopted.

As described above, after centering with high accuracy by the open / close shaft 15, the shaft 3 is inserted into the shaft 3. Therefore, abrasion powder does not occur due to strong rubbing of the inner circumference of the mounting hole of the disk 5 with the outer circumference of the hub 3.

In particular, when the discs 5 and the spacer ring 6 are transferred and stacked, it is sufficient to roughly position and stack the split shaft portions 15a and 15b in a closed state, and the centering is used for the split shaft portion 15a. , 15b will be performed all at once in a short time.
The automatic assembly of the discs can be performed at high speed.

In addition, since the discs 5 and the spacer rings 6 are all inserted into the hub 3 all at once in a laminated state, when the discs 5 ... or the spacer rings 6 ... Even if foreign matter such as abrasion powder is generated, the foreign matter is not blocked by the spacer ring 6 and does not drop onto the disc 5, and the space between the disc 5 and the spacer ring 6 and the shaft portion 3 is prevented. It becomes a trapped state. Therefore, unlike the conventional case, there is no possibility that abrasion powder will fall onto the disk 5 and cause a head crash or the like.

Since the disks 5 and the spacer ring 6 are inserted with the opening / closing shaft 15 closed and the outer diameter reduced, the holding claw can be inserted into a sufficiently large gap G, and the hand portion of the handling robot can be provided. Not limited to the vacuum suction means as shown in FIG. 8, it is also possible to use a holding mechanism that sandwiches the inner circumference and the outer circumference of the disk 5 and the spacer ring 6.

[Brief description of drawings]

FIG. 1 is a view for explaining the basic principle of an automatic disc assembling method according to the present invention in the order of operation, and FIG. 2 (a) is a plan view showing the whole of an automatic disc assembling apparatus for carrying out the present invention method. FIG. 3B is a perspective view showing an embodiment of the reversing mechanism, FIG. 3C is a perspective view of a support claw, FIG. 3 is a plan view showing another embodiment of the opening / closing shaft, and FIG. 4 is an opening / closing shaft. 5 is a cross-sectional view showing an example of the opening / closing drive mechanism, FIG. 5 is a cross-sectional view showing an example in which the disk automatic assembling method of the present invention is assembled into a magnetic recording medium in a magnetic disk device in the order of assembling operation, FIG. 7 is a cross-sectional view of a disk mounting portion of a magnetic disk device, FIG. 7 is a cross-sectional view illustrating the generation of wear debris by a conventional disk assembly method, and FIG. 8 is a conventional handling robot automatic assembly method. FIG. In the figure, 3 is a hub (shaft part), 5 is a disk, 6 is a spacer ring, 15 is an opening / closing shaft, 15a, 15b ... are split shaft parts, 16
a, 16b ... Support claws, 17 is a sloping surface, 18 is a disc mounting hole, 19 is a spacer ring mounting hole, 18a, 18b
Is a chamfered part of a disk, 19a and 19b are chamfered parts of a spacer ring, 23 is a handling robot for stacking, 26 is a frame (rotating plate), and 29 is a handling robot for simultaneous insertion.

Claims (1)

[Claims] 1. An opening / closing shaft (15) whose outer diameter can be changed by opening and closing the split shaft portions (15a) (15b) is provided vertically, and the split shaft portions (15a) (15b) are closed to have a small diameter. In this state, the disks to be assembled are transferred to the outside of the opening / closing shaft (15) and stacked, and when the required number of disks have been stacked, the opening / closing shaft (15) is opened,
The discs (5) are centered by being brought into contact with the inner circumference of the central hole (18) of the discs (5), and then the opening / closing shaft (15) is closed to close the discs (5). After providing a large gap (G) between the inner circumference and the inner circumference of the discs, the stacked discs (5) are transferred all at once onto the shaft part (3) such as a hub, and lowered to simultaneously A method for automatically assembling a disc, characterized in that the disc is inserted into a shaft portion (3).