JPH07220349A - Disk clamping device - Google Patents

Abstract

PURPOSE:To enable a clamping substrate to be used in common against different disks by exchanging a lower side cap, a disk guiding part and an upper side cap in accordance with the size of a center opening of the disk. CONSTITUTION:The clamping substrate 10 is provided with a base part 22, a bearing part 24 and a rotary shaft part 26. The rotary shaft part is rotatably supported by the bearing part and provided with a stand part projecting from the bearing part and a towery part vertically extending from the stand part. The lower side cap 12 is provided with the central opening for inserting the towery part of the substrate and arranged on the clamping substrate by making the recessed part to the opposite side of the clamping substrate. The disk guiding part 16 is mounted on a tip of the towery part of the rotary shaft part and provided with an inclined part to guide the center opening of the disk. The upper side cap 20 is provided with a cup-shaped part having nearly the same diameter as that of the lower side cap, and the disk is inserted and held therewith in between the lower side cap.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc clamp device for fixing or clamping a disc such as a hard disc.

[0002]

2. Description of the Related Art A hard disk inspection apparatus used in a manufacturing line conveys a disk by a robot hand to improve productivity, and the disk clamping and inspection are automated. ing.
In a conventional disc clamp device, a plurality of annularly arranged support pieces contract inward when the disc is mounted, and then spread outward after the mounting so that each support piece presses the inner edge of the disc. To clamp. However, in this device, each piece partially presses the inner edge of the disc, so that when the disc size becomes smaller and the disc becomes thinner, the disc becomes deformed, and the disc near the clamp position is brought about. In the vicinity of the inner diameter edge portion, the distortion waveform caused by the deformation of the disk may be included in the measurement waveform and normal measurement may not be performed. In order to prevent such a deformation of the disc, conventionally, the disc is placed on a clamp base having an inner diameter equal to the inner diameter of the disc and a stepped peripheral edge portion that comes into contact with a flat surface near the inner edge portion of the disc, and clamped. A clamp cap having a peripheral edge equivalent to that of the base body presses the disk from above with surface contact. According to this, the flat surface near the inner diameter edge of the disk is uniformly pressed by the clamp cap, and the disk is not deformed. However, the size of the disc is 3.5 inches, 2.5 inches, 1.8 inches, etc., and it is uneconomical because it is necessary to facilitate a clamp base body whose inner diameter of the peripheral portion varies depending on the size of the disc. .

Accordingly, it is an object of the present invention to provide a disc clamping device which uses a single clamping base and can accommodate discs of various sizes by simple parts replacement.

[0004]

DISCLOSURE OF THE INVENTION The disc clamping device of the present invention comprises a clamping base, a lower cap, a disc guide and an upper cap. The clamp base has a base portion, a bearing portion, and a rotary shaft portion, and the rotary shaft portion is rotatably supported by the bearing portion, and is rotationally driven by a rotation driving means provided in the base portion. The rotating shaft portion has a base portion protruding from the bearing portion and a tower portion extending vertically from the center of the base portion. An exhaust port is provided on the outer surface of the bearing part, and an exhaust path communicating from the exhaust port to the tip of the tower part is formed in the clamp base. The lower cap is in the shape of a cup with a recess formed in a cylinder, has a central opening into which the tower portion of the base is inserted, and is disposed on the clamp base with the recess opposite the clamp base. The disc guide portion is attached to the tip of the tower portion of the rotating shaft portion, and has a columnar portion having an outer diameter substantially equal to the inner diameter of the lower cap, and an inclined portion that guides the center opening of the disc to this columnar portion. The upper cap has a cup-shaped portion having substantially the same diameter as the lower cap, and sandwiches the disc between the upper cap and the lower cap. By exhausting from the exhaust port, the upper cap presses the disc and the disc is clamped. In this device, the clamp base can be commonly used for different discs by replacing the lower cap, the disc guide portion and the upper cap depending on the size of the central opening of the disc.

[0005]

1 is an exploded perspective view showing a disc clamp device of the present invention, and FIG. 2 is an assembly diagram of the disc clamp device of FIG.
FIG. 2 is a cross-sectional view of the device along line A (FIG. 1) with 00 clamped. This disc clamp device has a clamp base 10, a lower cap 12,
It includes a coil spring 14, a disc guide 16, a screw 18, and an upper cap 20. The clamp base 10 includes a base portion 22, a bearing portion 24, and a rotary shaft portion 26. A cylindrical cavity 28 is formed along the central axis of the base 22, and a rotation driver (not shown) such as a motor for rotating the disk is accommodated in the cavity 28. The bearing portion 24 is attached to the upper surface of the base portion 22, and similarly to the base portion 22, the bearing portion 24 has a cylindrical cavity formed along the central axis thereof, and further, an exhaust passage that penetrates from the outer curved surface to the inner curved surface. 32 is provided, and the outer end of the exhaust passage 32 serves as the exhaust port 33 of this device. .

The rotating shaft portion 26 is coupled to the cylindrical intermediate shaft portion 34, which is housed in the cavity 30 of the cylindrical bearing portion 24, and the intermediate shaft portion 34, and projects from the bearing portion 24 into the cavity 28 of the base portion 22. And a cylindrical upper shaft portion 38 that is coupled to the intermediate shaft portion 34 and that projects from the bearing portion 24 to the opposite side of the base portion 22.
The lower shaft portion 36 is directly rotationally driven by a rotary driver housed in the cavity of the base portion 22, whereby the rotating shaft portion 2
The whole 6 rotates. The intermediate shaft portion 34 has a central opening formed along its rotation axis, a plurality of radial openings provided at right angles to the central portion and radially, and on a circumference so as to connect the plurality of radial openings. The exhaust passage 40 is formed by a groove portion provided in the. The plurality of radiant openings of the exhaust passage 40 have a linear positional relationship with the exhaust passage 32 of the bearing portion 24 via the groove portion at each predetermined rotational position of the rotary shaft portion 26. The upper shaft portion 38 includes a cylindrical base portion 42 directly connected to the intermediate shaft portion 34 and a cylindrical tower portion 44 extending vertically from the center of the upper surface of the base portion. The base 42 of the upper shaft 38
The tower 44 has an exhaust passage 46 along the central rotation axis.
Is formed. The exhaust passage 42 communicates with the exhaust passage 40 in the intermediate shaft portion 34 at its end on the base portion side, and is internally threaded at the end portion on the tower portion side.

The lower cap 12 has a cup shape formed by forming a concave portion in a column, and an opening 48 having a diameter slightly larger than the diameter of the tower portion of the upper shaft portion 38 of the rotating shaft portion 26 is formed at the center thereof. To be done. The outer diameter of the lower cap 12 is slightly larger than the diameter of the central opening of the disc 100 to be clamped, and when the disc 100 having a different central opening size is clamped, the lower cap 12 has a corresponding outer diameter. Replace with cap 12. Also, the disc guide 16 and the upper cap 20 are replaced accordingly. In the lower cap 12, the tower portion 44 of the rotary shaft portion 26 is inserted into the opening 48, and the flat surface of the cap 12 is placed on the rotary shaft portion 26.
The base 42 is placed in contact with the upper surface of the base 42, that is, with the recess facing upward. The spiral spring 14 is disposed in the recess of the lower cap 12 through the tower portion 44 of the rotating shaft 26.

The disc guide portion 16 has a first columnar portion 50 having a diameter slightly smaller than the diameter of the coil spring 14, and is coupled to the first columnar portion 50. The disc guide portion 16 has a diameter substantially equal to that of the columnar recess of the lower cap 12. It is composed of two columnar portions 52 and an inclined portion 54 which is connected to the second columnar portion and has a diameter that decreases with distance from the second columnar portion, and an opening 56 is formed along the central axis thereof. The opening 56 has a first portion having a diameter slightly larger than the diameter of the tower portion 44 of the upper shaft portion 38 and the inclined portion 50.
It includes a second portion having a larger diameter on the side than the first portion. While inserting the disc guide portion 16 into the winding spring 14 and inserting the tower portion 44 of the upper shaft portion 38 into the opening 56, the disc guide portion 16 is pressed against the elasticity of the spring 14,
The disk guide 16 is attached to the tower 44 by screwing the screw 18 into the end of the tower 44. In this state, the second cylindrical portion of the disc guide portion 16 is at the height of the upper end of the lower cap 12. By attaching the disk guide portion 16 to the tower portion 44 via the winding spring 14, even if the disk guide portion 16 is pressed by an impact or the like, the spring 14 can absorb the pressing force. If such shock absorption is not expected, the winding spring 14 is removed, and the length of the first cylindrical portion 50 of the disc guide portion 16 is appropriately lengthened.
The disc guide portion 16 may be fixedly attached to the tower portion 44. Further, the screw 18 is formed with an opening penetrating along the central axis thereof. Therefore, the exhaust passage 32 of the bearing portion 24 communicates with the outside of the disc guide portion 16 through the exhaust passages 40 and 46 of the rotating shaft portion 26 and the opening of the screw 18.

The upper cap 20 comprises a cup-shaped portion 58 having a diameter substantially the same as that of the lower cap 12, similar to the lower cap 12, and a handle portion 60 extending from the center of the plane of the cup-shaped portion. The handle portion 60 is formed with a recess in the middle so that the handle portion 60 can be easily gripped by a robot hand.

The operation of clamping the disc 100 as shown in FIG. 2 by the apparatus of the present invention is as follows. First, with the exhaust port of the bearing unit 24 not exhausting,
The robot hand (not shown) has a disc guide 16
After the disc 100 is conveyed while being inserted into the central opening of the disc 100, the disc 100 is released. The position of the disc 100 is adjusted by the inclined portion 54 and comes into contact with the upper end peripheral portion of the lower cap 12. Next, the robot
The hand grips the handle portion 60 of the upper cap 20, conveys the upper cap 20 with the disc guide portion 16 inserted in the recess of the upper cap 12, and releases the upper cap 20, like the disc 100. . The position of the upper cap 20 is adjusted by the inclined portion 54, and the peripheral edge of the lower end of the upper cap 20 contacts the disc 100. In this state, when the exhaust means (not shown) is used to exhaust air from the exhaust port 33, the cavity between the upper cap 20 and the disc guide portion 16 is in a vacuum state, and the upper cap 20 is ejected from the disc 10.
By pressing 0, the disc 100 is clamped.

[0011]

According to the disk clamp device of the present invention,
Depending on the size of the central opening of the disc, the lower cap,
By exchanging the disc guide and the upper cap, the clamp base can be commonly used for different discs, which is economical.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a disc clamp device of the present invention.

FIG. 2 is a cross-sectional view showing a state where a disc is clamped by the device of FIG.

[Explanation of symbols]

 10 Clamp Base 12 Lower Cap 16 Disc Guide 20 Upper Cap 32, 42 Exhaust Path 44 Tower 100 Disc

Claims (1)

[Claims] 1. A clamp base body having a tower portion extending vertically from a planar upper surface and having an exhaust passage formed therein to communicate with a tip of the tower body, and a central opening into which the tower portion of the clamp base body is inserted. A cylindrical first cap having a concave portion on the side of the clamp base opposite to the clamp base; a disc guide attached to the tip of the tower of the clamp base; and a first cap on the first cap. A disc clamping device comprising: a disc to be arranged and a second cap having a diameter substantially the same as that of the first cap and sandwiching the disc with the first cap.