JPH0351834Y2 - - Google Patents

Description

[Detailed description of the invention] <Summary> For example, a magnetic disk medium and head, which are enclosed in a sealed cover structure for dust prevention, are sealed inside a disk enclosure that also serves as a cover and structure. etc., the joints are difficult to disassemble during maintenance. Therefore, in order to improve disassembly work efficiency, we provided a screw hole and screwed in the screw to forcibly separate the parts.

<Industrial field of application> Comparison of piping flange-type seal joint structures that have a hole for passing a joint bolt through the opposing surface facing the other side through a packing, or a pair of holes and screw holes. This relates to, for example, a disk enclosure (hereinafter commonly referred to as D and E) of a sealed magnetic disk device, which requires a large size and is difficult to handle.

<Conventional technology and problems> A magnetic disk device rotates a disk disk,
Reading and writing are performed by floating the head due to the relative flow velocity between the head and the boundary layer of air attached to the disk surface.

This floating height is extremely small, 1×10 ^-6 m.
Because the order is front and back, if smoke or dirt in the air gets caught between them, it will immediately cause a contact accident, causing a so-called head crash.
The disk, head, head access section, etc. are put together into a main structural unit, and a lid structural unit is placed over this, and a sealing member is sandwiched between the sealing facing surfaces of these two structural units to seal the unit. Was. However, such an assembled unit includes parts such as motors, media, heads, head access parts, etc., which have a limited operating life and must be replaced if a failure occurs.
Eventually, it would be necessary to disassemble it for maintenance, but when attempting to disassemble it, there was a problem in that the sealing surface deteriorated and stuck to the opposing surface, making it difficult to separate the sealing surface even if the coupling screw was removed. And this is especially true if the DE cover structure is not just a cover, but one that manages the relative positional accuracy with related tolerances and shares the bearing structure on one side of the support shaft. Random operations or operations that involve forcing a chisel into the parts will affect the reproducibility during reassembly and may cause scratches on the sealing surface.

<Solution Means> In view of the above, the present invention provides a structure in which the seal surface that causes adsorption with a gasket or liquid seal can be easily peeled off and disassembled. In a seal structure structure having a structure in which a sealing member is sandwiched between a structure A having a facing surface for sealing and a structure B having a seal facing surface facing the same for sealing and tightening the seal member to each other. Provide some screw holes on the opposite side of the structure, or on parts facing each other in the same direction as the opposite side, and install an abutment surface on the opposite part of the other structure opposite to the screw holes. By leaving the
If you use more than one book, you can separate the seal joints while adjusting the mutual inclination.

<Function> With this configuration, by screwing the threaded bolt into the sacrificial screw hole after removing the coupling bolt, the threaded bolt can be used for both the function of a booster for separation and the function of correcting relative inclination, and it can be brought into opposing contact. Since the surface is limited, there is no need to put too much stress on the structure.
To enable easy and efficient disassembly and easy reassembly without applying impact to the device assembly.

<Embodiment> FIG. 1 is an explanatory diagram of an embodiment that also serves as a principle diagram of the present invention, and FIGS. 2, 3, and 4 are supplementary diagrams of FIG. 1.

The lower structure 1 of the disk enclosure corresponding to structure A and the cover or upper structure 2 which also serves as a cover corresponding to structure B align their joint surfaces 1a and 2a, and if necessary tighten the sealing member 3 between them. The flange portions of structures A and B are tightened as a pair when the joint surfaces of structure A and structure B face each other at the seal connection position. 1b and 2
A sealing connection is achieved by screwing bolts 4 into pairs 1d and 2d of screw through holes and screw holes provided at corresponding positions on b, respectively.

The feature of the present invention is that in addition to the pair of through holes and the closing screw holes 1d and 2d, there is a screw in either the flange part 1b or 2b that avoids the seal grooves 1c and 2c and has no through hole on the opposite side. This is achieved by configuring several extra holes 1e.

This screw hole 1e has no function when tightening the A structure and B structure with the bolt 4 and sealing by tightening the sealing member accordingly, but in order to disassemble this, it is necessary to remove all the bolts 4. , the adhesiveness of the seal member in the loosened state,
This is to gently remove the stickiness caused by oily dirt, etc., and as shown in Figure 2, when it is difficult to separate, a bolt can be screwed into this closing screw hole to remove the seal joint between the two structures that were stuck together. can be easily and quietly separated without damaging the surface.

Note that the relationship between structure B and structure A is that when structure B is just a seal cover as shown in Figure 3,
As shown in Figure 4, the disk spindle bearing,
In some cases, the bearings of the head access motors are shared, and in the structure shown in Figure 4, opposing positioning is performed using positioning pins to ensure mutual accuracy during assembly, but such repeatability accuracy is required. In some cases, it is necessary to remove the locating pin from the fitting hole little by little while maintaining parallelism between the two structures within a certain level, but this task can be facilitated by preparing several screw holes for separation work. can be made extremely easy.

<Effects> As explained above, according to the present invention, a unique effect is produced in that disassembly and reassembly work is extremely facilitated by simply providing a few extra screw holes in the seal joint structure. It is something.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram of an embodiment that also serves as a principle diagram of the present invention, and Figures 2, 3, and 4 are supplementary diagrams of Figure 1, and each is an explanatory diagram in a separated state and a sealed one. 1 in the figure showing the cross-sectional view of the state is the lower structure (A
structure), 2 is the superstructure (corresponds to B structure), 3
is a sealing member, 4 is a bolt for tightening, 1a and 2a are the joint surfaces of the respective structures that face each other during sealing, 1b and 2b are the flanges of the respective structures, and 1c and 2c are the seals configured respectively. Groove, 1
d and 2d indicate through holes and screw holes provided at opposite positions of the respective structures, and 1e indicates an independently provided screw hole. Further, 5 indicates a disk, and 6 indicates a head access section.

Claims (1)

[Claims for Utility Model Registration] The bonding surface 1a of structure A and the bonding surface 2a of structure B,
A seal joint disassembly structure comprising a seal joint structure in which the seal members 3 are opposed to each other and are tightened, wherein one or more sacrificial screw holes 1e are provided on one of the joint surfaces.