JPS6213755B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention provides a method for holding magnetic disks (hereinafter referred to as disks) widely used in electronic computers, etc. as high-speed rotating bodies such as disk packs. A structure that allows assembly by easily aligning the rotation center (rotation center in dynamic balance) to maintain the dynamic balance that is especially required for a high-speed rotating body, without using special tools such as assembly positioning jigs with the pack. It is related to.

[Background of the invention]

Generally, in this type of structure, the rotation centers of the disk, disk pack, etc. are usually set using a jig for setting the rotation center of the disk. This example will be explained using FIGS. 1 and 2. In the figure, numeral 1 indicates a disk having a cut-off circular portion in the center, and five disks are used in this example. Reference numeral 2 denotes a spacer formed on an annular plate in order to stack the disks 1 in five stages, and is interposed between each adjacent disk 1. 3 is a disk 1 stacked in 5 stages.
This is an upper holder for pressing and holding the spacer 2 from above and below. 4 is also a lower retainer. Numeral 5 is a bolt that applies a tightening pressure to the upper retainer 3 and the lower retainer 4 to vertically clamp the disk 1 and the spacer 2. 6 is a nut screwed onto the bolt 5.

In this structure, disk 1
To assemble and position the disks, a spacer 2 is placed above the disk 1, and then the disk 1 is placed on this spacer 2, and the disks 1 are stacked in five layers in the same manner. Next, the disk 1 and the spacer 2 are held between the upper holder 3 and the lower holder 4, and the mechanical rotation center of the disk 1 is positioned using a positioning jig (not shown). Thereafter, by screwing together the bolts 5 and nuts 6, the five disks 1 are stably held by the upper retainer 3 and the lower retainer 4, forming a so-called disk pack. It is becoming.

However, in the structure described above, since the positioning of the disk 1 is performed using special jigs and tools, it requires a large number of man-hours for assembly, and this positioning work requires a high degree of skill.
There is a problem that there is a problem in practicality.

[Purpose of the invention]

The purpose of the present invention is to eliminate these problems and
To provide a structure that allows accurate positioning by extremely simple work, regardless of whether a skilled person or an unskilled person, without using special jigs or tools.

[Summary of the invention]

This purpose is to provide an upper retainer having a first guide flange that abuts the inner peripheral surface and upper surface of the uppermost disk, and a second guide flange that abuts the lower surface of the lowermost disk.
a lower retainer having a guide flange; a third guide flange that abuts the inner peripheral surface and upper surface of the lower disk; and a third guide flange that abuts the lower surface of the upper disk of the lower magnetic disk and the upper retainer or the upper spacer. This is achieved by a structure characterized by a spacer having four guide flanges.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

In FIG. 3, 1 has a missing circle part in the center,
It is a disk whose inner peripheral surface has a rounded cross section, and five disks are used. 5 is a bolt,
6 is a nut that can be screwed onto the bolt 5. Reference numeral 7 denotes an upper retainer, and a first guide flange is formed by a protrusion 7a that contacts the inner peripheral surface 1a of the uppermost disk 1 and a contact portion 7b that contacts the upper surface 1b of the disk 1. There is. Reference numeral 8 denotes a lower retainer, and a second guide flange is formed at an abutting portion 8a that abuts against the lower surface 1c of the disk 1 at the lowermost stage. A spacer 9 is provided at a position where the circumference is divided into three, and is interposed between each disk 1. That is, the spacer 9 has a protrusion 9 that abuts the inner circumferential surface 1a of the lower disk 1.
a and a contact portion 9b that contacts the upper surface 1b of the disk 1 form a third guide flange, and further,
Contact portion 9 that contacts the lower surface 1c of the upper disk 1
c and the contact portion 9d that contacts the upper holder 7 or the spacer 9 form a fourth guide flange. On the other hand, as shown in detail in FIG.
The surface that contacts the inner circumferential portion 1a is formed with a tapered surface that widens downward. The surface of the protrusion 8b that comes into contact with the spacer 9 is formed with a tapered surface that widens upward. The surface of the protruding portion 9a that comes into contact with the inner peripheral portion 1a is formed with a tapered surface that widens downward. The surface of the contact portion 9d that contacts the spacer 9 or the upper holder 7 is formed with a tapered surface that becomes wider downward.

In such a structure, in order to assemble the disk, the disk 1 is placed on the contact surface 8a of the lower retainer 8.
Further, the abutment part 9b of the spacer 9 is placed on the upper surface part 1b of this disk 1, and the disk 1 and the spacer 9 are placed above it in order to form the disk 1 in five stages. do. Then, the upper retainer 7 is placed on the uppermost disk 1, and the upper retainer 7 and the lower retainer 8 are tightened with bolts 5 and nuts 6. In other words, as shown in detail in Figure 4,
Due to the tightening forces F ₁ and F ₂ by the bolts 5 and nuts 6, the inner circumferential portion 1a of the disk 1 is
Pushed outward by _{the two} angled tapers.
At the same time, the upper retainer 7 is also pushed outward by the tapered portion of the contact portion 9d having an angle of _θ1 . Therefore, the position of the disk 1 is determined at the predetermined center of rotation. Similarly, Spacer 1 and Disk 1
Pressure is also applied between the disks 1 and the lower holder 8, so that the centers of rotation of all the disks 1 are accurately aligned.

In this embodiment, the spacers 9 are provided at positions dividing the circumference of the disk 1 into three, but a larger number may be provided.
It may be formed into an annular shape.

Also, upper retainer 7, disk 1, spacer 9
The state of contact between the three members is not limited to the embodiment. For example, a tapered surface of θ ₁ may be provided on the upper retainer side, and a contact portion that is vertically erected may be provided in contact with this tapered surface. There are various modifications such as being able to provide it on the spacer side.

Furthermore, the selection of the number of disks and the number of bolts are left to the freedom of design.

〔Effect of the invention〕

As described above, according to the present invention, there is an advantage that the disk pack can be assembled with accurate positioning by a simple operation without using special jigs and tools.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing the conventional structure, Figure 2 is the
3 is a sectional view showing an embodiment of the present invention, and FIG. 4 is an enlarged sectional view of a part of FIG. 3. 1... Disk, 7... Upper retainer, 8... Lower retainer, 9... Spacer.

Claims (1)

[Claims] 1 A structure in which a plurality of magnetic disks with a spacer interposed between them are sandwiched between an upper holder and a lower holder, and has a first guide flange that comes into contact with the inner circumferential surface and the upper surface of the uppermost magnetic disk. an upper retainer; a lower retainer having a second guide flange that abuts the lower surface of the lowermost magnetic disk;
A spacer having a third guide flange that contacts the inner circumferential surface and the upper surface of the lower magnetic disk, and a fourth guide flange that contacts the lower surface of the upper magnetic disk of the lower magnetic disk and the upper retainer or the upper spacer. A magnetic disk holding structure characterized by comprising: