JPS61154200A - Shelf construction for mounting communication circuit unit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention relates to a shelf structure for mounting communication circuit units, and particularly to a shelf structure for mounting communication circuit units in the vertical direction. Regarding possible shelf structures.

Conventionally, shelves are mounted by vertically inserting communication circuit units with electronic components mounted on a rectangular printed circuit board. I had to prepare things.

If you want to share one type of shelf, it is necessary to standardize the size of the printed circuit board, but depending on the communication circuit unit that has a large number of electronic components to be mounted, it is necessary to standardize the size of the printed circuit board. Because of this, two printed circuit boards had to be stacked using spacers, etc., and the electrical connection between the two printed circuit boards was complicated, making it difficult to mount on a shelf and causing inconvenience in terms of maintenance and management of the communication circuit unit. was.

In addition, in order to be able to mount all the necessary components on one printed circuit board, the printed circuit board or shelf must necessarily be made larger, but conversely, it is necessary to increase the size of the printed circuit board or shelf. This results in a lot of wasted space.

The present invention is to enable communication circuit units of various sizes (in unit units) to be mounted vertically on the same shelf, thereby improving the packaging density of the shelf.

In order to solve these problems, the present invention provides a shelf structure in which a plurality of communication circuit units consisting of a rectangular printed circuit board and electronic components mounted on the printed circuit board are mounted. In: A fixed rail defining a plurality of grooves extending parallel to the depth direction at equal intervals on the bottom surface of the shelf, and a fixed rail defining a plurality of grooves corresponding to the grooves of these bottom surface fixed rails on the top surface of the shelf. The rails are placed,
A printed circuit board of maximum height can be inserted between these bottom and top fixed rails; it includes multiple rail members that can be detachably attached to the shelf back structure, and each rail member, when fixed, and/or has grooves on its upper and lower surfaces that correspond to the grooves of the upper fixed rail or the grooves of other rail members, and a printed circuit board with a smaller height is inserted between the fixed rail and the rail member or between the rail members. A shelf structure for mounting a communication circuit unit is provided.

1 Saturday ■ Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows an exploded perspective view of the shelf structure of the present invention. This shelf structure is made of rectangular printed circuit boards of various sizes and heights, e.g.
It is possible to mount a communication circuit unit consisting of a printed board of 1 height (la), 1/2 height (1b>), and 1/4 height (IC).

Each communication circuit unit LAP LB, LC is equipped with various electronic components and integrated circuits (not shown in FIG. 1) on a printed circuit board.
IC), ultra-large integrated circuit (LSI), etc. are mounted, and a connector 2 is attached to the tip.

The shelf 10 is a square box and has a bottom part 11, a top part 12, and a back part 13. Both side parts are not shown. A fixed rail llb is formed on the bottom surface portion 11 and defines a large number of guide grooves 11a extending in parallel at equal intervals in the depth direction. Similarly, the upper surface portion 12 is also formed with fixed rails 12b that define a large number of guide grooves 12a extending in parallel at equal intervals in the depth direction. These fixed rails llb and 12b correspond vertically in parallel, and a 1/1 height printed circuit board unit 1a can be inserted vertically between the corresponding guide grooves 11a and llb. It has become.

A rail member 20 can be detachably fixed to the back surface 13 of the shelf 10, as will be described in detail later. As shown in detail in FIGS. 2 to 4, the rail member 20 has a substantially H-shaped cross section and has longitudinal grooves 20a and 20b on the upper and lower sides, respectively. When these rail members 20 are fixed to the back surface part 13, the grooves 20a of the rail members 20.

20b is the fixed rail llb, 12b is the guide groove 11a,
12a s or other grooves 20a, 2 of the rail member 20
Unit 1 b p 1 of printed circuit board aligned corresponding to 0b and having 1/2 height or 1/4 height between these grooves.
It is now possible to insert c. That is, the back part 1
3, horizontal frame members 14 are fixed at equal intervals in the vertical direction (intervals that divide the space between the bottom surface part 11 and the top surface part 12 into four), and each rail member 14 is fixed as shown in FIGS. 3 to 5. 20 can be detachably attached to these horizontal frame members 14 at equal intervals.

Further, a back plate 15 is attached to the back part 13, and a connector 16 located between the horizontal frame members 14 is attached to the back plate 15.
are fixed, and these connectors 16 are connected to the outside of the shelf via cords 17. When the printed board units la, lb, and lc are inserted into predetermined locations on the shelf, the connector 2 fixed to the tip of the printed board is joined to the connector 16 on the back plate 15. required unit l
a.

After all lb and lc are mounted, the top plate 21 is attached to the shelf body with bolts or screws 18.

The shelf body 10 is provided with screw holes 19 for mounting the top plate 17.

FIG. 2 shows in detail the portion indicated by the symbol ``■'' in FIG. 1. As mentioned above, the communication circuit unit has various electronic components 4 mounted on the printed circuit board 3.
If the height of the component 4 with the smallest height when attached to the printed circuit board is h, then the height hl of the rail member 20 from the printed circuit board is hl<h, and the height of the adjacent rail member 2
0 to maintain a sufficient distance between them so that air A for cooling can sufficiently flow therethrough.

3 to 5 show examples of the rail member 20 and its mounting method. In the embodiment of FIG. 3, the rail member 20 is made of a suitable plastic material and has a generally T-shaped mounting portion 20c at one end thereof which further includes two projecting pins 20d and a groove 20e. On the other hand, the horizontal frame member 14 fixed to the back part 13 has a substantially T-shaped cross section and has a longitudinal protrusion 14a.
Recesses 14b are formed at regular intervals. Further, a hole 14d corresponding to the protruding pin 20d of the rail member 20 is formed in the base portion 14c having a substantially T-shaped cross section. Therefore, when the rail member 20 is inserted in the direction of arrow B, the groove 20
e engages with the recess 14b of the protrusion 14a, and the protruding pin 20d fits into the hole 14d, and when it is further pushed in with force, both sides of the rail member 20 completely fit into the recess 14b of the horizontal frame member 14. , the rail member 20 is held by the horizontal frame member 14.

In this way, the parts that engage with each other, the protruding pin 20d and the hole 14a, the width of the rail member 20 and the width of the recess 14b, and the groove 20
The width of e and the width of the protruding portion 14a are in an interference fit relationship so that they fit firmly into each other.

In the embodiment shown in FIG. 4, the rail member 20 has a T-shaped mounting portion 2Of at one end, and the screws 22 are inserted into the two holes 20g of the mounting portion 20f, and the screws 22 are inserted into the screw holes 14 of the horizontal frame member 14.
It is fixed by tightening it to e.

In the embodiment shown in FIG. 5, the rail member 20 has guide grooves 20a at the top and bottom of the central part, by combining a small central plate member 25 and slightly wide plate members 26 on both sides in a sandwich shape. 20b. The tip of the center plate member 25 is slightly protruding, and this protruding portion is inserted into the hole 14f of the horizontal frame member 14, and the screw 27 is inserted into the hole 26b of the flange portion 26a at the tip of the side plates 26. This rail member 20 is fixed by screwing it into the screw hole 14g.

6 and 7 show the relationship between the rail member 20 and the surface plate 21. FIG. Presser bars 28 are fixed to the inside of the surface plate 21 at the same intervals as the horizontal frame members 14 of the back section 13. Recesses 28a are formed in this presser bar 28 at regular intervals. On the other hand, corresponding grooves 20h are formed on both sides of the front end of the rail member 20. When the thickness of the printed circuit board 3 is t, it is desirable that the horizontal distance between the bottoms of both grooves 20h be the same t, and the presser bar 28
The horizontal width of the recess 28a is made slightly wider than t (1+
α) It is desirable to do so. Further, when the width of both grooves 20h in the vertical direction is l, it is desirable that the width of the presser bar 28 in the vertical direction is slightly smaller than l (J-α). Thus,
When the surface plate 21 is attached to the shelf 10 (FIG. 1), the front end of each rail member 20 engages with the recess 28a of the presser bar 28, and the rail member 20 is held in front thereof.

FIGS. 8 and 9 show a method for obtaining printed circuit boards, ie, communication circuit units, of various sizes and heights. As shown in FIG. 8, when obtaining a printed board 30a of 1/1 height from one printed board material 30, the edges are cut as shown. Next, when obtaining a printed board 30b with a height of 1/2, the printed board 30b with a height of 1/1 is obtained.
0a is cut leaving a cutting margin of width d in the center. Furthermore, if you want to obtain a printed board 30c of 1/4 height in the same way, 1
/2 height printed board 30b is maximized leaving a cutting margin of width d in the center. Note that the upper and lower grooves 20 of the rail member 20
vertical distance h2 between the bottoms of a and 20b (second
Figure) is slightly smaller than this cutting width d (h2=a-α)
It is desirable to do so.

The manufacturing order of the communication circuit unit is as shown in FIG.
First, the printed board material 30 is dimensioned to match the size of the printed board to be obtained (a), and then groove processing (31) is performed along the dimensioned line (bl), and then electronic components are mounted. , the unit is assembled (C), the unit is then tested in this state using the test jig 32 (d), and finally it is cut and separated into printed boards of various sizes to form the desired unit. (e) In this way, it is convenient to perform various tests such as mounting electronic components and assembling the unit using the initial large printed board material 30 as it is.

and such series of various sizes and heights)
The communication circuit unit is installed on shelf 1 as shown in Figure 1.
It is convenient to implement in 0.

Effects of the Invention As described above, according to the present invention, communication circuit units of various sizes, especially the size and height of series units, can be easily mounted vertically on the same shelf. be able to. Further, since the units of the series-based sizes can be manufactured before cutting the printed circuit board material, there is an advantage that the manufacturing process can be simplified.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of the shelf structure of the present invention, Fig. 2 is a perspective view showing the part marked with the symbol ■ in Fig. 1 in detail, and Fig. 3 is a detailed view of the part marked with the mark ■ in Fig. 1. FIG. 4 and FIG. 5 are exploded perspective views showing other embodiments of the rail member, and FIG. 6 is an exploded perspective view showing one embodiment of the rail member. FIG. 7 is an exploded perspective view, FIG. 7 is a perspective view of the front panel viewed from inside, FIG. 8 is a diagram showing an example of cutting a printed board, and FIG. 9 is a diagram schematically showing the manufacturing process of the unit. la, lb, lc---communication circuit unit, 11.12...bottom surface and top surface portion, 11a, 12a...guide groove, llb, 12b-
...Guide groove, 13...Back part, 14...Horizontal frame member, 20...Rail member, 20a, 20b
...Guide groove, 21...Front plate, 28...Press bar.

Claims (1)

[Claims] 1. In a shelf structure in which a plurality of communication circuit units consisting of a rectangular printed circuit board and electronic components mounted on the printed circuit board are mounted; a plurality of grooves extending in the depth direction parallel to the bottom surface of the shelf are defined at equal intervals. At the same time, a fixed rail is arranged on the top surface of the shelf that defines a plurality of grooves corresponding to the grooves of these bottom fixed rails, and a maximum height printed circuit board is placed between these bottom and top fixed rails. includes a plurality of rail members that can be detachably attached to the shelf back structure, and each rail member, when fixed, can be inserted into the groove of the bottom and/or top fixed rail or the groove of another rail member. A shelf structure for mounting a communication circuit unit, characterized in that it has grooves corresponding to the fixed rail and the rail member on its upper and lower surfaces, and a printed circuit board having a smaller height can be inserted between the fixed rail and the rail member or between the rail members. .